Add fixed ESPAsyncWebServer update NimBLE

.github/workflows/build_push.yml

@@ -86,7 +86,7 @@ jobs:
         uses: actions/checkout@v2
         with:
           repository: h2zero/NimBLE-Arduino
-          ref: 1.2.0
+          ref: 1.4.2
           path: CustomNimBLE-Arduino
 
       - name: Install Adafruit_NeoPixel
@@ -167,7 +167,7 @@ jobs:
       - name: Modify platform.txt
         run: |
           for i in $(find /home/runner/.arduino15/packages/esp32/ -name "ld_libs"); do
-            sed -i 's/-lxtensa/-lxtensa -zmuldefs /' "$i"
+            sed -i 's/-lxtensa /-lxtensa -zmuldefs /' "$i"
             cat "$i"
           done
           

esp32_marauder/WiFiScan.cpp

@@ -19,6 +19,7 @@ extern "C" int ieee80211_raw_frame_sanity_check(int32_t arg, int32_t arg2, int32
 
 extern "C" {
   uint8_t esp_base_mac_addr[6];
+  esp_err_t esp_base_mac_addr_set(const uint8_t *addr);
   esp_err_t esp_ble_gap_set_rand_addr(const uint8_t *rand_addr);
 }
 

libraries/ESPAsyncWebServer/LICENSE

@@ -0,0 +1,165 @@
+                   GNU LESSER GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+
+  This version of the GNU Lesser General Public License incorporates
+the terms and conditions of version 3 of the GNU General Public
+License, supplemented by the additional permissions listed below.
+
+  0. Additional Definitions.
+
+  As used herein, "this License" refers to version 3 of the GNU Lesser
+General Public License, and the "GNU GPL" refers to version 3 of the GNU
+General Public License.
+
+  "The Library" refers to a covered work governed by this License,
+other than an Application or a Combined Work as defined below.
+
+  An "Application" is any work that makes use of an interface provided
+by the Library, but which is not otherwise based on the Library.
+Defining a subclass of a class defined by the Library is deemed a mode
+of using an interface provided by the Library.
+
+  A "Combined Work" is a work produced by combining or linking an
+Application with the Library.  The particular version of the Library
+with which the Combined Work was made is also called the "Linked
+Version".
+
+  The "Minimal Corresponding Source" for a Combined Work means the
+Corresponding Source for the Combined Work, excluding any source code
+for portions of the Combined Work that, considered in isolation, are
+based on the Application, and not on the Linked Version.
+
+  The "Corresponding Application Code" for a Combined Work means the
+object code and/or source code for the Application, including any data
+and utility programs needed for reproducing the Combined Work from the
+Application, but excluding the System Libraries of the Combined Work.
+
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+
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+without being bound by section 3 of the GNU GPL.
+
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+  If you modify a copy of the Library, and, in your modifications, a
+facility refers to a function or data to be supplied by an Application
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+
+   a) under this License, provided that you make a good faith effort to
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+   function or data, the facility still operates, and performs
+   whatever part of its purpose remains meaningful, or
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+   b) under the GNU GPL, with none of the additional permissions of
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+  3. Object Code Incorporating Material from Library Header Files.
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+   a) Give prominent notice with each copy of the object code that the
+   Library is used in it and that the Library and its use are
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+choice, if you do both of the following:
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+   a) Accompany the combined library with a copy of the same work based
+   on the Library, uncombined with any other library facilities,
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+   is a work based on the Library, and explaining where to find the
+   accompanying uncombined form of the same work.
+
+  6. Revised Versions of the GNU Lesser General Public License.
+
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+versions will be similar in spirit to the present version, but may
+differ in detail to address new problems or concerns.
+
+  Each version is given a distinguishing version number. If the
+Library as you received it specifies that a certain numbered version
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+published by the Free Software Foundation. If the Library as you
+received it does not specify a version number of the GNU Lesser
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+General Public License ever published by the Free Software Foundation.
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+  If the Library as you received it specifies that a proxy can decide
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+Library.

libraries/ESPAsyncWebServer/README.md

@@ -0,0 +1,87 @@
+# ESP Async WebServer
+
+[![License: LGPL 3.0](https://img.shields.io/badge/License-LGPL%203.0-yellow.svg)](https://opensource.org/license/lgpl-3-0/)
+[![Continuous Integration](https://github.com/mathieucarbou/ESPAsyncWebServer/actions/workflows/ci.yml/badge.svg)](https://github.com/mathieucarbou/ESPAsyncWebServer/actions/workflows/ci.yml)
+[![PlatformIO Registry](https://badges.registry.platformio.org/packages/mathieucarbou/library/ESP%20Async%20WebServer.svg)](https://registry.platformio.org/libraries/mathieucarbou/ESP%20Async%20WebServer)
+
+Asynchronous HTTP and WebSocket Server Library for ESP32.
+Supports: WebSocket, SSE, Authentication, Arduino Json 7, File Upload, Static File serving, URL Rewrite, URL Redirect, etc.
+
+This fork is based on [yubox-node-org/ESPAsyncWebServer](https://github.com/yubox-node-org/ESPAsyncWebServer) and includes all the concurrency fixes.
+
+## Changes in this fork
+
+- Removed SPIFFSEditor
+- Deployed in PlatformIO registry and Arduino IDE library manager
+- CI
+- Some code cleanup
+- `SSE_MAX_QUEUED_MESSAGES` to control the maximum number of messages that can be queued for a SSE client
+- `write()` function public in `AsyncEventSource.h`
+- Arduino Json 7 compatibility and backward compatible with 6 and 6 (changes in `AsyncJson.h`). The API to use Json has not changed. These are only internal changes.
+- `WS_MAX_QUEUED_MESSAGES`: control the maximum number of messages that can be queued for a Websocket client
+- Resurrected `AsyncWebSocketMessageBuffer` and `makeBuffer()` in order to make the fork API-compatible with the original library from me-no-dev regarding WebSocket.
+- [#5](https://github.com/mathieucarbou/ESPAsyncWebServer/pull/5) ([@vortigont](https://github.com/vortigont)): set real "Last-Modified" header based on file's LastWrite time
+- [#13](https://github.com/mathieucarbou/ESPAsyncWebServer/pull/13) ([@tueddy](https://github.com/tueddy)): Compile with Arduino 3 (ESP-IDF 5.1)
+- [#14](https://github.com/mathieucarbou/ESPAsyncWebServer/pull/14) ([@nilo85](https://github.com/nilo85)): Add support for Auth & GET requests in AsyncCallbackJsonWebHandler
+- Added `setAuthentication(const String& username, const String& password)`
+- Added `StreamConcat` example to shoiw how to stream multiple files in one response
+- Remove filename after inline in Content-Disposition header according to RFC2183
+- Depends on `mathieucarbou/Async TCP @ ^3.1.4`
+- Arduino 3 / ESP-IDF 5.1 compatibility
+- Added all flavors of `binary()`, `text()`, `binaryAll()` and `textAll()` in `AsyncWebSocket`
+- Added `setCloseClientOnQueueFull(bool)` which can be set on a client to either close the connection or discard messages but not close the connection when the queue is full
+
+## Documentation
+
+Usage and API stays the same as the original library.
+Please look at the original libraries for more examples and documentation.
+
+[https://github.com/yubox-node-org/ESPAsyncWebServer](https://github.com/yubox-node-org/ESPAsyncWebServer)
+
+## `AsyncWebSocketMessageBuffer` and `makeBuffer()`
+
+The fork from `yubox-node-org` introduces some breaking API changes compared to the original library, especially regarding the use of `std::shared_ptr<std::vector<uint8_t>>` for WebSocket.
+
+This fork is compatible with the original library from `me-no-dev` regarding WebSocket, and wraps the optimizations done by `yubox-node-org` in the `AsyncWebSocketMessageBuffer` class.
+So you have the choice of which API to use.
+I strongly suggest to use the optimized API from `yubox-node-org` as it is much more efficient.
+
+Here is an example for serializing a Json document in a websocket message buffer. This code is compatible with any forks, but not optimized:
+
+```cpp
+void send(JsonDocument& doc) {
+  const size_t len = measureJson(doc);
+
+  // original API from me-no-dev
+  AsyncWebSocketMessageBuffer* buffer = _ws->makeBuffer(len);
+  assert(buffer); // up to you to keep or remove this
+  serializeJson(doc, buffer->get(), len);
+  _ws->textAll(buffer);
+}
+```
+
+Here is an example for serializing a Json document in a more optimized way, and compatible with both forks:
+
+```cpp
+void send(JsonDocument& doc) {
+  const size_t len = measureJson(doc);
+
+#if defined(ASYNCWEBSERVER_FORK_mathieucarbou)
+
+  // this fork (originally from yubox-node-org), uses another API with shared pointer that better support concurrent use cases then the original project
+  auto buffer = std::make_shared<std::vector<uint8_t>>(len);
+  assert(buffer); // up to you to keep or remove this
+  serializeJson(doc, buffer->data(), len);
+  _ws->textAll(std::move(buffer));
+
+#else
+
+  // original API from me-no-dev
+  AsyncWebSocketMessageBuffer* buffer = _ws->makeBuffer(len);
+  assert(buffer); // up to you to keep or remove this
+  serializeJson(doc, buffer->get(), len);
+  _ws->textAll(buffer);
+
+#endif
+}
+```

libraries/ESPAsyncWebServer/docs/_config.yml

@@ -0,0 +1,8 @@
+# bundle exec jekyll serve --host=0.0.0.0
+
+title: ESP Async WebServer
+description: "Asynchronous HTTP and WebSocket Server Library for ESP32"
+remote_theme: pages-themes/cayman@v0.2.0
+plugins:
+  - jekyll-remote-theme
+  

libraries/ESPAsyncWebServer/docs/index.md

@@ -0,0 +1,87 @@
+# ESP Async WebServer
+
+[![License: LGPL 3.0](https://img.shields.io/badge/License-LGPL%203.0-yellow.svg)](https://opensource.org/license/lgpl-3-0/)
+[![Continuous Integration](https://github.com/mathieucarbou/ESPAsyncWebServer/actions/workflows/ci.yml/badge.svg)](https://github.com/mathieucarbou/ESPAsyncWebServer/actions/workflows/ci.yml)
+[![PlatformIO Registry](https://badges.registry.platformio.org/packages/mathieucarbou/library/ESP%20Async%20WebServer.svg)](https://registry.platformio.org/libraries/mathieucarbou/ESP%20Async%20WebServer)
+
+Asynchronous HTTP and WebSocket Server Library for ESP32.
+Supports: WebSocket, SSE, Authentication, Arduino Json 7, File Upload, Static File serving, URL Rewrite, URL Redirect, etc.
+
+This fork is based on [yubox-node-org/ESPAsyncWebServer](https://github.com/yubox-node-org/ESPAsyncWebServer) and includes all the concurrency fixes.
+
+## Changes in this fork
+
+- Removed SPIFFSEditor
+- Deployed in PlatformIO registry and Arduino IDE library manager
+- CI
+- Some code cleanup
+- `SSE_MAX_QUEUED_MESSAGES` to control the maximum number of messages that can be queued for a SSE client
+- `write()` function public in `AsyncEventSource.h`
+- Arduino Json 7 compatibility and backward compatible with 6 and 6 (changes in `AsyncJson.h`). The API to use Json has not changed. These are only internal changes.
+- `WS_MAX_QUEUED_MESSAGES`: control the maximum number of messages that can be queued for a Websocket client
+- Resurrected `AsyncWebSocketMessageBuffer` and `makeBuffer()` in order to make the fork API-compatible with the original library from me-no-dev regarding WebSocket.
+- [#5](https://github.com/mathieucarbou/ESPAsyncWebServer/pull/5) ([@vortigont](https://github.com/vortigont)): set real "Last-Modified" header based on file's LastWrite time
+- [#13](https://github.com/mathieucarbou/ESPAsyncWebServer/pull/13) ([@tueddy](https://github.com/tueddy)): Compile with Arduino 3 (ESP-IDF 5.1)
+- [#14](https://github.com/mathieucarbou/ESPAsyncWebServer/pull/14) ([@nilo85](https://github.com/nilo85)): Add support for Auth & GET requests in AsyncCallbackJsonWebHandler
+- Added `setAuthentication(const String& username, const String& password)`
+- Added `StreamConcat` example to shoiw how to stream multiple files in one response
+- Remove filename after inline in Content-Disposition header according to RFC2183
+- Depends on `mathieucarbou/Async TCP @ ^3.1.4`
+- Arduino 3 / ESP-IDF 5.1 compatibility
+- Added all flavors of `binary()`, `text()`, `binaryAll()` and `textAll()` in `AsyncWebSocket`
+- Added `setCloseClientOnQueueFull(bool)` which can be set on a client to either close the connection or discard messages but not close the connection when the queue is full
+
+## Documentation
+
+Usage and API stays the same as the original library.
+Please look at the original libraries for more examples and documentation.
+
+[https://github.com/yubox-node-org/ESPAsyncWebServer](https://github.com/yubox-node-org/ESPAsyncWebServer)
+
+## `AsyncWebSocketMessageBuffer` and `makeBuffer()`
+
+The fork from `yubox-node-org` introduces some breaking API changes compared to the original library, especially regarding the use of `std::shared_ptr<std::vector<uint8_t>>` for WebSocket.
+
+This fork is compatible with the original library from `me-no-dev` regarding WebSocket, and wraps the optimizations done by `yubox-node-org` in the `AsyncWebSocketMessageBuffer` class.
+So you have the choice of which API to use.
+I strongly suggest to use the optimized API from `yubox-node-org` as it is much more efficient.
+
+Here is an example for serializing a Json document in a websocket message buffer. This code is compatible with any forks, but not optimized:
+
+```cpp
+void send(JsonDocument& doc) {
+  const size_t len = measureJson(doc);
+
+  // original API from me-no-dev
+  AsyncWebSocketMessageBuffer* buffer = _ws->makeBuffer(len);
+  assert(buffer); // up to you to keep or remove this
+  serializeJson(doc, buffer->get(), len);
+  _ws->textAll(buffer);
+}
+```
+
+Here is an example for serializing a Json document in a more optimized way, and compatible with both forks:
+
+```cpp
+void send(JsonDocument& doc) {
+  const size_t len = measureJson(doc);
+
+#if defined(ASYNCWEBSERVER_FORK_mathieucarbou)
+
+  // this fork (originally from yubox-node-org), uses another API with shared pointer that better support concurrent use cases then the original project
+  auto buffer = std::make_shared<std::vector<uint8_t>>(len);
+  assert(buffer); // up to you to keep or remove this
+  serializeJson(doc, buffer->data(), len);
+  _ws->textAll(std::move(buffer));
+
+#else
+
+  // original API from me-no-dev
+  AsyncWebSocketMessageBuffer* buffer = _ws->makeBuffer(len);
+  assert(buffer); // up to you to keep or remove this
+  serializeJson(doc, buffer->get(), len);
+  _ws->textAll(buffer);
+
+#endif
+}
+```

libraries/ESPAsyncWebServer/examples/CaptivePortal/CaptivePortal.ino

@@ -0,0 +1,54 @@
+#include <DNSServer.h>
+#ifdef ESP32
+#include <WiFi.h>
+#include <AsyncTCP.h>
+#elif defined(ESP8266)
+#include <ESP8266WiFi.h>
+#include <ESPAsyncTCP.h>
+#endif
+#include "ESPAsyncWebServer.h"
+
+DNSServer dnsServer;
+AsyncWebServer server(80);
+
+class CaptiveRequestHandler : public AsyncWebHandler {
+public:
+  CaptiveRequestHandler() {}
+  virtual ~CaptiveRequestHandler() {}
+
+  bool canHandle(__unused AsyncWebServerRequest *request){
+    //request->addInterestingHeader("ANY");
+    return true;
+  }
+
+  void handleRequest(AsyncWebServerRequest *request) {
+    AsyncResponseStream *response = request->beginResponseStream("text/html");
+    response->print("<!DOCTYPE html><html><head><title>Captive Portal</title></head><body>");
+    response->print("<p>This is out captive portal front page.</p>");
+    response->printf("<p>You were trying to reach: http://%s%s</p>", request->host().c_str(), request->url().c_str());
+    response->printf("<p>Try opening <a href='http://%s'>this link</a> instead</p>", WiFi.softAPIP().toString().c_str());
+    response->print("</body></html>");
+    request->send(response);
+  }
+};
+
+
+void setup(){
+  Serial.begin(115200);
+  Serial.println();
+  Serial.println("Configuring access point...");
+
+  if (!WiFi.softAP("esp-captive")) {
+    Serial.println("Soft AP creation failed.");
+    while (1);
+  }
+
+  dnsServer.start(53, "*", WiFi.softAPIP());
+  server.addHandler(new CaptiveRequestHandler()).setFilter(ON_AP_FILTER);//only when requested from AP
+  //more handlers...
+  server.begin();
+}
+
+void loop(){
+  dnsServer.processNextRequest();
+}

libraries/ESPAsyncWebServer/examples/Filters/Filters.ino

@@ -0,0 +1,108 @@
+// Reproduced issue https://github.com/mathieucarbou/ESPAsyncWebServer/issues/26
+
+#include <DNSServer.h>
+#ifdef ESP32
+#include <AsyncTCP.h>
+#include <WiFi.h>
+#elif defined(ESP8266)
+#include <ESP8266WiFi.h>
+#include <ESPAsyncTCP.h>
+#endif
+#include "ESPAsyncWebServer.h"
+
+DNSServer dnsServer;
+AsyncWebServer server(80);
+
+class CaptiveRequestHandler : public AsyncWebHandler {
+  public:
+    CaptiveRequestHandler() {}
+    virtual ~CaptiveRequestHandler() {}
+
+    bool canHandle(__unused AsyncWebServerRequest* request) {
+      // request->addInterestingHeader("ANY");
+      return true;
+    }
+
+    void handleRequest(AsyncWebServerRequest* request) {
+      AsyncResponseStream* response = request->beginResponseStream("text/html");
+      response->print("<!DOCTYPE html><html><head><title>Captive Portal</title></head><body>");
+      response->print("<p>This is out captive portal front page.</p>");
+      response->printf("<p>You were trying to reach: http://%s%s</p>", request->host().c_str(), request->url().c_str());
+      response->printf("<p>Try opening <a href='http://%s'>this link</a> instead</p>", WiFi.softAPIP().toString().c_str());
+      response->print("</body></html>");
+      request->send(response);
+    }
+};
+
+bool hit1 = false;
+bool hit2 = false;
+
+void setup() {
+  Serial.begin(115200);
+
+  server
+    .on("/", HTTP_GET, [](AsyncWebServerRequest* request) {
+      Serial.println("Captive portal request...");
+      Serial.println("WiFi.localIP(): " + WiFi.localIP().toString());
+      Serial.println("request->client()->localIP(): " + request->client()->localIP().toString());
+#if ESP_IDF_VERSION_MAJOR >= 5
+      Serial.println("WiFi.type(): " + String((int)WiFi.localIP().type()));
+      Serial.println("request->client()->type(): " + String((int)request->client()->localIP().type()));
+#endif
+      Serial.println(WiFi.localIP() == request->client()->localIP() ? "should be: ON_STA_FILTER" : "should be: ON_AP_FILTER");
+      Serial.println(WiFi.localIP() == request->client()->localIP());
+      Serial.println(WiFi.localIP().toString() == request->client()->localIP().toString());
+      request->send(200, "text/plain", "This is the captive portal");
+      hit1 = true;
+    })
+    .setFilter(ON_AP_FILTER);
+
+  server
+    .on("/", HTTP_GET, [](AsyncWebServerRequest* request) {
+      Serial.println("Website request...");
+      Serial.println("WiFi.localIP(): " + WiFi.localIP().toString());
+      Serial.println("request->client()->localIP(): " + request->client()->localIP().toString());
+#if ESP_IDF_VERSION_MAJOR >= 5
+      Serial.println("WiFi.type(): " + String((int)WiFi.localIP().type()));
+      Serial.println("request->client()->type(): " + String((int)request->client()->localIP().type()));
+#endif
+      Serial.println(WiFi.localIP() == request->client()->localIP() ? "should be: ON_STA_FILTER" : "should be: ON_AP_FILTER");
+      Serial.println(WiFi.localIP() == request->client()->localIP());
+      Serial.println(WiFi.localIP().toString() == request->client()->localIP().toString());
+      request->send(200, "text/plain", "This is the website");
+      hit2 = true;
+    })
+    .setFilter(ON_STA_FILTER);
+
+  // assert(WiFi.softAP("esp-captive-portal"));
+  // dnsServer.start(53, "*", WiFi.softAPIP());
+  // server.begin();
+  // Serial.println("Captive portal started!");
+
+  // while (!hit1) {
+  //   dnsServer.processNextRequest();
+  //   yield();
+  // }
+  // delay(1000); // Wait for the client to process the response
+
+  // Serial.println("Captive portal opened, stopping it and connecting to WiFi...");
+  // dnsServer.stop();
+  // WiFi.softAPdisconnect();
+
+  WiFi.persistent(false);
+  WiFi.begin("IoT");
+  while (WiFi.status() != WL_CONNECTED) {
+    delay(500);
+  }
+  Serial.println("Connected to WiFi with IP address: " + WiFi.localIP().toString());
+  server.begin();
+
+  // while (!hit2) {
+  //   delay(10);
+  // }
+  // delay(1000); // Wait for the client to process the response
+  // ESP.restart();
+}
+
+void loop() {
+}

libraries/ESPAsyncWebServer/examples/SimpleServer/SimpleServer.ino

@@ -0,0 +1,74 @@
+//
+// A simple server implementation showing how to:
+//  * serve static messages
+//  * read GET and POST parameters
+//  * handle missing pages / 404s
+//
+
+#include <Arduino.h>
+#ifdef ESP32
+#include <WiFi.h>
+#include <AsyncTCP.h>
+#elif defined(ESP8266)
+#include <ESP8266WiFi.h>
+#include <ESPAsyncTCP.h>
+#endif
+#include <ESPAsyncWebServer.h>
+
+AsyncWebServer server(80);
+
+const char* ssid = "YOUR_SSID";
+const char* password = "YOUR_PASSWORD";
+
+const char* PARAM_MESSAGE = "message";
+
+void notFound(AsyncWebServerRequest *request) {
+    request->send(404, "text/plain", "Not found");
+}
+
+void setup() {
+
+    Serial.begin(115200);
+    WiFi.mode(WIFI_STA);
+    WiFi.begin(ssid, password);
+    if (WiFi.waitForConnectResult() != WL_CONNECTED) {
+        Serial.printf("WiFi Failed!\n");
+        return;
+    }
+
+    Serial.print("IP Address: ");
+    Serial.println(WiFi.localIP());
+
+    server.on("/", HTTP_GET, [](AsyncWebServerRequest *request){
+        request->send(200, "text/plain", "Hello, world");
+    });
+
+    // Send a GET request to <IP>/get?message=<message>
+    server.on("/get", HTTP_GET, [] (AsyncWebServerRequest *request) {
+        String message;
+        if (request->hasParam(PARAM_MESSAGE)) {
+            message = request->getParam(PARAM_MESSAGE)->value();
+        } else {
+            message = "No message sent";
+        }
+        request->send(200, "text/plain", "Hello, GET: " + message);
+    });
+
+    // Send a POST request to <IP>/post with a form field message set to <message>
+    server.on("/post", HTTP_POST, [](AsyncWebServerRequest *request){
+        String message;
+        if (request->hasParam(PARAM_MESSAGE, true)) {
+            message = request->getParam(PARAM_MESSAGE, true)->value();
+        } else {
+            message = "No message sent";
+        }
+        request->send(200, "text/plain", "Hello, POST: " + message);
+    });
+
+    server.onNotFound(notFound);
+
+    server.begin();
+}
+
+void loop() {
+}

libraries/ESPAsyncWebServer/examples/StreamFiles/StreamConcat.h

@@ -0,0 +1,33 @@
+#pragma once
+
+#include <Stream.h>
+
+class StreamConcat : public Stream {
+  public:
+    StreamConcat(Stream* s1, Stream* s2) : _s1(s1), _s2(s2) {}
+
+    size_t write(__unused const uint8_t* p, __unused size_t n) override { return 0; }
+    size_t write(__unused uint8_t c) override { return 0; }
+    void flush() override {}
+
+    int available() override { return _s1->available() + _s2->available(); }
+
+    int read() override {
+      int c = _s1->read();
+      return c != -1 ? c : _s2->read();
+    }
+
+    size_t readBytes(char* buffer, size_t length) override {
+      size_t count = _s1->readBytes(buffer, length);
+      return count > 0 ? count : _s2->readBytes(buffer, length);
+    }
+
+    int peek() override {
+      int c = _s1->peek();
+      return c != -1 ? c : _s2->peek();
+    }
+
+  private:
+    Stream* _s1;
+    Stream* _s2;
+};

libraries/ESPAsyncWebServer/examples/StreamFiles/StreamFiles.ino

@@ -0,0 +1,73 @@
+#include <Arduino.h>
+#include <DNSServer.h>
+#ifdef ESP32
+#include <AsyncTCP.h>
+#include <WiFi.h>
+#elif defined(ESP8266)
+#include <ESP8266WiFi.h>
+#include <ESPAsyncTCP.h>
+#endif
+#include "StreamConcat.h"
+#include "StreamString.h"
+#include <ESPAsyncWebServer.h>
+#include <LittleFS.h>
+
+DNSServer dnsServer;
+AsyncWebServer server(80);
+
+void setup() {
+  Serial.begin(115200);
+
+  LittleFS.begin();
+
+  WiFi.mode(WIFI_AP);
+  WiFi.softAP("esp-captive");
+  dnsServer.start(53, "*", WiFi.softAPIP());
+
+  File file1 = LittleFS.open("/header.html", "w");
+  file1.print("<html><head><title>ESP Captive Portal</title><meta http-equiv=\"refresh\" content=\"1\"></head><body>");
+  file1.close();
+
+  File file2 = LittleFS.open("/body.html", "w");
+  file2.print("<h1>Welcome to ESP Captive Portal</h1>");
+  file2.close();
+
+  File file3 = LittleFS.open("/footer.html", "w");
+  file3.print("</body></html>");
+  file3.close();
+
+  server.on("/", HTTP_GET, [](AsyncWebServerRequest* request) {
+    File header = LittleFS.open("/header.html", "r");
+    File body = LittleFS.open("/body.html", "r");
+    StreamConcat stream1(&header, &body);
+
+    StreamString content;
+    content.printf("FreeHeap: %" PRIu32, ESP.getFreeHeap());
+    StreamConcat stream2 = StreamConcat(&stream1, &content);
+
+    File footer = LittleFS.open("/footer.html", "r");
+    StreamConcat stream3 = StreamConcat(&stream2, &footer);
+
+    request->send(stream3, "text/html", stream3.available());
+    header.close();
+    body.close();
+    footer.close();
+  });
+
+  server.onNotFound([](AsyncWebServerRequest* request) {
+    request->send(404, "text/plain", "Not found");
+  });
+
+  server.begin();
+}
+
+uint32_t last = 0;
+
+void loop() {
+  // dnsServer.processNextRequest();
+
+  if (millis() - last > 2000) {
+    Serial.printf("FreeHeap: %" PRIu32, ESP.getFreeHeap());
+    last = millis();
+  }
+}

libraries/ESPAsyncWebServer/examples/StreamFiles/StreamString.h

@@ -0,0 +1,36 @@
+#pragma once
+
+#include <Stream.h>
+
+class StreamString : public Stream {
+  public:
+    size_t write(const uint8_t* p, size_t n) override { return _buffer.concat(reinterpret_cast<const char*>(p), n) ? n : 0; }
+    size_t write(uint8_t c) override { return _buffer.concat(static_cast<char>(c)) ? 1 : 0; }
+    void flush() override {}
+
+    int available() override { return static_cast<int>(_buffer.length()); }
+
+    int read() override {
+      if (_buffer.length() == 0)
+        return -1;
+      char c = _buffer[0];
+      _buffer.remove(0, 1);
+      return c;
+    }
+
+    size_t readBytes(char* buffer, size_t length) override {
+      if (length > _buffer.length())
+        length = _buffer.length();
+      // Don't use _str.ToCharArray() because it inserts a terminator
+      memcpy(buffer, _buffer.c_str(), length);
+      _buffer.remove(0, static_cast<unsigned int>(length));
+      return length;
+    }
+
+    int peek() override { return _buffer.length() > 0 ? _buffer[0] : -1; }
+
+    const String& buffer() const { return _buffer; }
+
+  private:
+    String _buffer;
+};

libraries/ESPAsyncWebServer/library.json

@@ -0,0 +1,54 @@
+{
+  "name": "ESP Async WebServer",
+  "version": "2.10.4",
+  "description": "Asynchronous HTTP and WebSocket Server Library for ESP32. Supports: WebSocket, SSE, Authentication, Arduino Json 7, File Upload, Static File serving, URL Rewrite, URL Redirect, etc.",
+  "keywords": "http,async,websocket,webserver",
+  "homepage": "https://github.com/mathieucarbou/ESPAsyncWebServer",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/mathieucarbou/ESPAsyncWebServer.git"
+  },
+  "authors": [
+    {
+      "name": "Hristo Gochkov"
+    },
+    {
+      "name": "Mathieu Carbou",
+      "maintainer": true
+    }
+  ],
+  "license": "LGPL-3.0",
+  "frameworks": "arduino",
+  "platforms": [
+    "espressif32",
+    "espressif8266"
+  ],
+  "dependencies": [
+    {
+      "owner": "mathieucarbou",
+      "name": "Async TCP",
+      "version": "^3.1.4",
+      "platforms": "espressif32"
+    },
+    {
+      "owner": "esphome",
+      "name": "ESPAsyncTCP-esphome",
+      "version": "^2.0.0",
+      "platforms": "espressif8266"
+    },
+    {
+      "name": "Hash",
+      "platforms": "espressif8266"
+    }
+  ],
+  "export": {
+    "include": [
+      "examples",
+      "src",
+      "library.json",
+      "library.properties",
+      "LICENSE",
+      "README.md"
+    ]
+  }
+}

libraries/ESPAsyncWebServer/library.properties

@@ -0,0 +1,10 @@
+name=ESP Async WebServer
+version=2.10.4
+author=Me-No-Dev
+maintainer=Mathieu Carbou <mathieu.carbou@gmail.com>
+sentence=Asynchronous HTTP and WebSocket Server Library for ESP32
+paragraph=Supports: WebSocket, SSE, Authentication, Arduino Json 7, File Upload, Static File serving, URL Rewrite, URL Redirect, etc
+category=Other
+url=https://github.com/mathieucarbou/ESPAsyncWebServer
+architectures=esp8266,esp32
+license=LGPL-3.0

libraries/ESPAsyncWebServer/platformio.ini

@@ -0,0 +1,44 @@
+[env]
+framework = arduino
+build_flags = 
+  -Wall -Wextra
+  -D CONFIG_ARDUHAL_LOG_COLORS
+  -D CORE_DEBUG_LEVEL=ARDUHAL_LOG_LEVEL_VERBOSE
+lib_deps = 
+  bblanchon/ArduinoJson @ 7.0.4
+  mathieucarbou/Async TCP @ ^3.1.4
+  ; https://github.com/mathieucarbou/AsyncTCP
+  ; https://github.com/me-no-dev/AsyncTCP
+  esphome/ESPAsyncTCP-esphome @ 2.0.0
+upload_protocol = esptool
+monitor_speed = 115200
+monitor_filters = esp32_exception_decoder, log2file
+
+[platformio]
+lib_dir = .
+; src_dir = examples/CaptivePortal
+; src_dir = examples/SimpleServer
+src_dir = examples/StreamFiles
+; src_dir = examples/Filters
+
+[env:arduino]
+platform = espressif32
+board = esp32dev
+
+[env:arduino-2]
+platform = espressif32@6.7.0
+board = esp32dev
+
+[env:arduino-3]
+platform = espressif32
+platform_packages=
+  platformio/framework-arduinoespressif32 @ https://github.com/espressif/arduino-esp32.git#3.0.0
+  platformio/framework-arduinoespressif32-libs @ https://github.com/espressif/arduino-esp32/releases/download/3.0.0/esp32-arduino-libs-3.0.0.zip
+board = esp32dev
+
+[env:esp8266]
+platform = espressif8266
+board = huzzah
+lib_deps = 
+  bblanchon/ArduinoJson @ 7.0.4
+  esphome/ESPAsyncTCP-esphome @ 2.0.0

libraries/ESPAsyncWebServer/src/AsyncEventSource.cpp

@@ -0,0 +1,412 @@
+/*
+  Asynchronous WebServer library for Espressif MCUs
+
+  Copyright (c) 2016 Hristo Gochkov. All rights reserved.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+#include "Arduino.h"
+#include "AsyncEventSource.h"
+#ifndef ESP8266
+  #include <rom/ets_sys.h>
+#endif
+
+static String generateEventMessage(const char *message, const char *event, uint32_t id, uint32_t reconnect){
+  String ev;
+
+  if(reconnect){
+    ev += F("retry: ");
+    ev += reconnect;
+    ev += F("\r\n");
+  }
+
+  if(id){
+    ev += F("id: ");
+    ev += String(id);
+    ev += F("\r\n");
+  }
+
+  if(event != NULL){
+    ev += F("event: ");
+    ev += String(event);
+    ev += F("\r\n");
+  }
+
+  if(message != NULL){
+    size_t messageLen = strlen(message);
+    char * lineStart = (char *)message;
+    char * lineEnd;
+    do {
+      char * nextN = strchr(lineStart, '\n');
+      char * nextR = strchr(lineStart, '\r');
+      if(nextN == NULL && nextR == NULL){
+        size_t llen = ((char *)message + messageLen) - lineStart;
+        char * ldata = (char *)malloc(llen+1);
+        if(ldata != NULL){
+          memcpy(ldata, lineStart, llen);
+          ldata[llen] = 0;
+          ev += F("data: ");
+          ev += ldata;
+          ev += F("\r\n\r\n");
+          free(ldata);
+        }
+        lineStart = (char *)message + messageLen;
+      } else {
+        char * nextLine = NULL;
+        if(nextN != NULL && nextR != NULL){
+          if(nextR < nextN){
+            lineEnd = nextR;
+            if(nextN == (nextR + 1))
+              nextLine = nextN + 1;
+            else
+              nextLine = nextR + 1;
+          } else {
+            lineEnd = nextN;
+            if(nextR == (nextN + 1))
+              nextLine = nextR + 1;
+            else
+              nextLine = nextN + 1;
+          }
+        } else if(nextN != NULL){
+          lineEnd = nextN;
+          nextLine = nextN + 1;
+        } else {
+          lineEnd = nextR;
+          nextLine = nextR + 1;
+        }
+
+        size_t llen = lineEnd - lineStart;
+        char * ldata = (char *)malloc(llen+1);
+        if(ldata != NULL){
+          memcpy(ldata, lineStart, llen);
+          ldata[llen] = 0;
+          ev += F("data: ");
+          ev += ldata;
+          ev += F("\r\n");
+          free(ldata);
+        }
+        lineStart = nextLine;
+        if(lineStart == ((char *)message + messageLen))
+          ev += F("\r\n");
+      }
+    } while(lineStart < ((char *)message + messageLen));
+  }
+
+  return ev;
+}
+
+// Message
+
+AsyncEventSourceMessage::AsyncEventSourceMessage(const char * data, size_t len)
+: _data(nullptr), _len(len), _sent(0), _acked(0)
+{
+  _data = (uint8_t*)malloc(_len+1);
+  if(_data == nullptr){
+    _len = 0;
+  } else {
+    memcpy(_data, data, len);
+    _data[_len] = 0;
+  }
+}
+
+AsyncEventSourceMessage::~AsyncEventSourceMessage() {
+     if(_data != NULL)
+        free(_data);
+}
+
+size_t AsyncEventSourceMessage::ack(size_t len, uint32_t time) {
+  (void)time;
+  // If the whole message is now acked...
+  if(_acked + len > _len){
+     // Return the number of extra bytes acked (they will be carried on to the next message)
+     const size_t extra = _acked + len - _len;
+     _acked = _len;
+     return extra;
+  }
+  // Return that no extra bytes left.
+  _acked += len;
+  return 0;
+}
+
+// This could also return void as the return value is not used.
+// Leaving as-is for compatibility...
+size_t AsyncEventSourceMessage::send(AsyncClient *client) {
+    if (_sent >= _len) {
+      return 0;
+    }
+    const size_t len_to_send = _len - _sent;
+    auto position = reinterpret_cast<const char*>(_data + _sent);
+    const size_t sent_now = client->write(position, len_to_send);
+    _sent += sent_now;
+    return sent_now;
+}
+
+// Client
+
+AsyncEventSourceClient::AsyncEventSourceClient(AsyncWebServerRequest *request, AsyncEventSource *server)
+: _messageQueue(AlternativeLinkedList<AsyncEventSourceMessage *>([](AsyncEventSourceMessage *m){ delete  m; }))
+{
+  _client = request->client();
+  _server = server;
+  _lastId = 0;
+  if(request->hasHeader(F("Last-Event-ID")))
+    _lastId = atoi(request->getHeader(F("Last-Event-ID"))->value().c_str());
+
+  _client->setRxTimeout(0);
+  _client->onError(NULL, NULL);
+  _client->onAck([](void *r, AsyncClient* c, size_t len, uint32_t time){ (void)c; ((AsyncEventSourceClient*)(r))->_onAck(len, time); }, this);
+  _client->onPoll([](void *r, AsyncClient* c){ (void)c; ((AsyncEventSourceClient*)(r))->_onPoll(); }, this);
+  _client->onData(NULL, NULL);
+  _client->onTimeout([this](void *r, AsyncClient* c __attribute__((unused)), uint32_t time){ ((AsyncEventSourceClient*)(r))->_onTimeout(time); }, this);
+  _client->onDisconnect([this](void *r, AsyncClient* c){ ((AsyncEventSourceClient*)(r))->_onDisconnect(); delete c; }, this);
+
+  _server->_addClient(this);
+  delete request;
+}
+
+AsyncEventSourceClient::~AsyncEventSourceClient(){
+  _lockmq.lock();
+  _messageQueue.free();
+  _lockmq.unlock();
+  close();
+}
+
+void AsyncEventSourceClient::_queueMessage(AsyncEventSourceMessage *dataMessage){
+  if(dataMessage == NULL)
+    return;
+  if(!connected()){
+    delete dataMessage;
+    return;
+  }
+  //length() is not thread-safe, thus acquiring the lock before this call..
+  _lockmq.lock();
+  if(_messageQueue.length() >= SSE_MAX_QUEUED_MESSAGES){
+#ifdef ESP8266
+    ets_printf(String(F("ERROR: Too many messages queued\n")).c_str());
+#else
+    log_e("Too many messages queued: deleting message");
+#endif
+      delete dataMessage;
+  } else {
+    _messageQueue.add(dataMessage);
+    // runqueue trigger when new messages added
+    if(_client->canSend()) {
+      _runQueue();
+    }
+  }
+  _lockmq.unlock();
+}
+
+void AsyncEventSourceClient::_onAck(size_t len, uint32_t time){
+  // Same here, acquiring the lock early
+  _lockmq.lock();
+  while(len && !_messageQueue.isEmpty()){
+    len = _messageQueue.front()->ack(len, time);
+    if(_messageQueue.front()->finished())
+      _messageQueue.remove(_messageQueue.front());
+  }
+  _runQueue();
+  _lockmq.unlock();
+}
+
+void AsyncEventSourceClient::_onPoll(){
+  _lockmq.lock();
+  if(!_messageQueue.isEmpty()){
+    _runQueue();
+  }
+  _lockmq.unlock();
+}
+
+void AsyncEventSourceClient::_onTimeout(uint32_t time __attribute__((unused))){
+  _client->close(true);
+}
+
+void AsyncEventSourceClient::_onDisconnect(){
+  _client = NULL;
+  _server->_handleDisconnect(this);
+}
+
+void AsyncEventSourceClient::close(){
+  if(_client != NULL)
+    _client->close();
+}
+
+void AsyncEventSourceClient::write(const char * message, size_t len){
+  _queueMessage(new AsyncEventSourceMessage(message, len));
+}
+
+void AsyncEventSourceClient::send(const char *message, const char *event, uint32_t id, uint32_t reconnect){
+  String ev = generateEventMessage(message, event, id, reconnect);
+  _queueMessage(new AsyncEventSourceMessage(ev.c_str(), ev.length()));
+}
+
+size_t AsyncEventSourceClient::packetsWaiting() const {
+    size_t len;
+    _lockmq.lock();
+    len = _messageQueue.length();
+    _lockmq.unlock();
+    return len;
+}
+
+void AsyncEventSourceClient::_runQueue() {
+  // Calls to this private method now already protected by _lockmq acquisition
+  // so no extra call of _lockmq.lock() here..
+  for (auto i = _messageQueue.begin(); i != _messageQueue.end(); ++i) {
+    // If it crashes here, iterator (i) has been invalidated as _messageQueue
+    // has been changed... (UL 2020-11-15: Not supposed to happen any more ;-) )
+    if (!(*i)->sent()) {
+      (*i)->send(_client);
+    }
+  }
+}
+
+
+// Handler
+
+AsyncEventSource::AsyncEventSource(const String& url)
+  : _url(url)
+  , _clients(AlternativeLinkedList<AsyncEventSourceClient *>([](AsyncEventSourceClient *c){ delete c; }))
+  , _connectcb(NULL)
+{}
+
+AsyncEventSource::~AsyncEventSource(){
+  close();
+}
+
+void AsyncEventSource::onConnect(ArEventHandlerFunction cb){
+  _connectcb = cb;
+}
+
+void AsyncEventSource::authorizeConnect(ArAuthorizeConnectHandler cb){
+  _authorizeConnectHandler = cb;
+}
+
+void AsyncEventSource::_addClient(AsyncEventSourceClient * client){
+  /*char * temp = (char *)malloc(2054);
+  if(temp != NULL){
+    memset(temp+1,' ',2048);
+    temp[0] = ':';
+    temp[2049] = '\r';
+    temp[2050] = '\n';
+    temp[2051] = '\r';
+    temp[2052] = '\n';
+    temp[2053] = 0;
+    client->write((const char *)temp, 2053);
+    free(temp);
+  }*/
+  AsyncWebLockGuard l(_client_queue_lock);
+  _clients.add(client);
+  if(_connectcb)
+    _connectcb(client);
+}
+
+void AsyncEventSource::_handleDisconnect(AsyncEventSourceClient * client){
+  AsyncWebLockGuard l(_client_queue_lock);
+  _clients.remove(client);
+}
+
+void AsyncEventSource::close(){
+  // While the whole loop is not done, the linked list is locked and so the
+  // iterator should remain valid even when AsyncEventSource::_handleDisconnect()
+  // is called very early
+  AsyncWebLockGuard l(_client_queue_lock);
+  for(const auto &c: _clients){
+    if(c->connected())
+      c->close();
+  }
+}
+
+// pmb fix
+size_t AsyncEventSource::avgPacketsWaiting() const {
+  size_t aql = 0;
+  uint32_t nConnectedClients = 0;
+  AsyncWebLockGuard l(_client_queue_lock);
+  if (_clients.isEmpty()) {
+    return 0;
+  }
+  for(const auto &c: _clients){
+    if(c->connected()) {
+      aql += c->packetsWaiting();
+      ++nConnectedClients;
+    }
+  }
+  return ((aql) + (nConnectedClients/2)) / (nConnectedClients); // round up
+}
+
+void AsyncEventSource::send(
+    const char *message, const char *event, uint32_t id, uint32_t reconnect){
+  String ev = generateEventMessage(message, event, id, reconnect);
+  AsyncWebLockGuard l(_client_queue_lock);
+  for(const auto &c: _clients){
+    if(c->connected()) {
+      c->write(ev.c_str(), ev.length());
+    }
+  }
+}
+
+size_t AsyncEventSource::count() const {
+  size_t n_clients;
+  AsyncWebLockGuard l(_client_queue_lock);
+  n_clients = _clients.count_if([](AsyncEventSourceClient *c){
+                                    return c->connected();
+                                });
+  return n_clients;
+}
+
+bool AsyncEventSource::canHandle(AsyncWebServerRequest *request){
+  if(request->method() != HTTP_GET || !request->url().equals(_url)) {
+    return false;
+  }
+  request->addInterestingHeader(F("Last-Event-ID"));
+  request->addInterestingHeader("Cookie");
+  return true;
+}
+
+void AsyncEventSource::handleRequest(AsyncWebServerRequest *request){
+  if((_username.length() && _password.length()) && !request->authenticate(_username.c_str(), _password.c_str())) {
+    return request->requestAuthentication();
+  }
+  if(_authorizeConnectHandler != NULL){
+    if(!_authorizeConnectHandler(request)){
+      return request->send(401);
+    }
+  }
+  request->send(new AsyncEventSourceResponse(this));
+}
+
+// Response
+
+AsyncEventSourceResponse::AsyncEventSourceResponse(AsyncEventSource *server){
+  _server = server;
+  _code = 200;
+  _contentType = F("text/event-stream");
+  _sendContentLength = false;
+  addHeader(F("Cache-Control"), F("no-cache"));
+  addHeader(F("Connection"), F("keep-alive"));
+}
+
+void AsyncEventSourceResponse::_respond(AsyncWebServerRequest *request){
+  String out = _assembleHead(request->version());
+  request->client()->write(out.c_str(), _headLength);
+  _state = RESPONSE_WAIT_ACK;
+}
+
+size_t AsyncEventSourceResponse::_ack(AsyncWebServerRequest *request, size_t len, uint32_t time __attribute__((unused))){
+  if(len){
+    new AsyncEventSourceClient(request, _server);
+  }
+  return 0;
+}
+

libraries/ESPAsyncWebServer/src/AsyncEventSource.h

@@ -0,0 +1,147 @@
+/*
+  Asynchronous WebServer library for Espressif MCUs
+
+  Copyright (c) 2016 Hristo Gochkov. All rights reserved.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+#ifndef ASYNCEVENTSOURCE_H_
+#define ASYNCEVENTSOURCE_H_
+
+#include <Arduino.h>
+#ifdef ESP32
+#include <AsyncTCP.h>
+#ifndef SSE_MAX_QUEUED_MESSAGES
+#define SSE_MAX_QUEUED_MESSAGES 32
+#endif
+#else
+#include <ESPAsyncTCP.h>
+#ifndef SSE_MAX_QUEUED_MESSAGES
+#define SSE_MAX_QUEUED_MESSAGES 8
+#endif
+#endif
+
+#include <ESPAsyncWebServer.h>
+
+#include "AsyncWebSynchronization.h"
+
+#ifdef ESP8266
+#include <Hash.h>
+#ifdef CRYPTO_HASH_h // include Hash.h from espressif framework if the first include was from the crypto library
+#include <../src/Hash.h>
+#endif
+#endif
+
+#ifdef ESP32
+#define DEFAULT_MAX_SSE_CLIENTS 8
+#else
+#define DEFAULT_MAX_SSE_CLIENTS 4
+#endif
+
+class AsyncEventSource;
+class AsyncEventSourceResponse;
+class AsyncEventSourceClient;
+typedef std::function<void(AsyncEventSourceClient *client)> ArEventHandlerFunction;
+typedef std::function<bool(AsyncWebServerRequest *request)> ArAuthorizeConnectHandler;
+
+class AsyncEventSourceMessage {
+  private:
+    uint8_t * _data;
+    size_t _len;
+    size_t _sent;
+    //size_t _ack;
+    size_t _acked;
+  public:
+    AsyncEventSourceMessage(const char * data, size_t len);
+    ~AsyncEventSourceMessage();
+    size_t ack(size_t len, uint32_t time __attribute__((unused)));
+    size_t send(AsyncClient *client);
+    bool finished(){ return _acked == _len; }
+    bool sent() { return _sent == _len; }
+};
+
+class AsyncEventSourceClient {
+  private:
+    AsyncClient *_client;
+    AsyncEventSource *_server;
+    uint32_t _lastId;
+    AlternativeLinkedList<AsyncEventSourceMessage *> _messageQueue;
+    // ArFi 2020-08-27 for protecting/serializing _messageQueue
+    AsyncPlainLock _lockmq;
+    void _queueMessage(AsyncEventSourceMessage *dataMessage);
+    void _runQueue();
+
+  public:
+
+    AsyncEventSourceClient(AsyncWebServerRequest *request, AsyncEventSource *server);
+    ~AsyncEventSourceClient();
+
+    AsyncClient* client(){ return _client; }
+    void close();
+    void write(const char * message, size_t len);
+    void send(const char *message, const char *event=NULL, uint32_t id=0, uint32_t reconnect=0);
+    bool connected() const { return (_client != NULL) && _client->connected(); }
+    uint32_t lastId() const { return _lastId; }
+    size_t  packetsWaiting() const;
+
+    //system callbacks (do not call)
+    void _onAck(size_t len, uint32_t time);
+    void _onPoll();
+    void _onTimeout(uint32_t time);
+    void _onDisconnect();
+};
+
+class AsyncEventSource: public AsyncWebHandler {
+  private:
+    String _url;
+    AlternativeLinkedList<AsyncEventSourceClient *> _clients;
+    // Same as for individual messages, protect mutations of _clients list
+    // since simultaneous access from different tasks is possible
+    AsyncWebLock _client_queue_lock;
+    ArEventHandlerFunction _connectcb;
+	  ArAuthorizeConnectHandler _authorizeConnectHandler;
+  public:
+    AsyncEventSource(const String& url);
+    ~AsyncEventSource();
+
+    const char * url() const { return _url.c_str(); }
+    void close();
+    void onConnect(ArEventHandlerFunction cb);
+    void authorizeConnect(ArAuthorizeConnectHandler cb);
+    void send(const char *message, const char *event=NULL, uint32_t id=0, uint32_t reconnect=0);
+    // number of clients connected
+    size_t count() const;
+    size_t  avgPacketsWaiting() const;
+
+    //system callbacks (do not call)
+    void _addClient(AsyncEventSourceClient * client);
+    void _handleDisconnect(AsyncEventSourceClient * client);
+    virtual bool canHandle(AsyncWebServerRequest *request) override final;
+    virtual void handleRequest(AsyncWebServerRequest *request) override final;
+};
+
+class AsyncEventSourceResponse: public AsyncWebServerResponse {
+  private:
+    String _content;
+    AsyncEventSource *_server;
+  public:
+    AsyncEventSourceResponse(AsyncEventSource *server);
+    void _respond(AsyncWebServerRequest *request);
+    size_t _ack(AsyncWebServerRequest *request, size_t len, uint32_t time);
+    bool _sourceValid() const { return true; }
+};
+
+
+#endif /* ASYNCEVENTSOURCE_H_ */

libraries/ESPAsyncWebServer/src/AsyncJson.h

@@ -0,0 +1,282 @@
+// AsyncJson.h
+/*
+  Async Response to use with ArduinoJson and AsyncWebServer
+  Written by Andrew Melvin (SticilFace) with help from me-no-dev and BBlanchon.
+
+  Example of callback in use
+
+   server.on("/json", HTTP_ANY, [](AsyncWebServerRequest * request) {
+
+    AsyncJsonResponse * response = new AsyncJsonResponse();
+    JsonObject& root = response->getRoot();
+    root["key1"] = "key number one";
+    JsonObject& nested = root.createNestedObject("nested");
+    nested["key1"] = "key number one";
+
+    response->setLength();
+    request->send(response);
+  });
+
+  --------------------
+
+  Async Request to use with ArduinoJson and AsyncWebServer
+  Written by Arsène von Wyss (avonwyss)
+
+  Example
+
+  AsyncCallbackJsonWebHandler* handler = new AsyncCallbackJsonWebHandler("/rest/endpoint");
+  handler->onRequest([](AsyncWebServerRequest *request, JsonVariant &json) {
+    JsonObject& jsonObj = json.as<JsonObject>();
+    // ...
+  });
+  server.addHandler(handler);
+
+*/
+#ifndef ASYNC_JSON_H_
+#define ASYNC_JSON_H_
+#include <ArduinoJson.h>
+#include <ESPAsyncWebServer.h>
+#include <Print.h>
+
+#if ARDUINOJSON_VERSION_MAJOR == 6
+#ifndef DYNAMIC_JSON_DOCUMENT_SIZE
+#define DYNAMIC_JSON_DOCUMENT_SIZE 1024
+#endif
+#endif
+
+constexpr const char* JSON_MIMETYPE = "application/json";
+
+/*
+ * Json Response
+ * */
+
+class ChunkPrint : public Print {
+  private:
+    uint8_t* _destination;
+    size_t _to_skip;
+    size_t _to_write;
+    size_t _pos;
+
+  public:
+    ChunkPrint(uint8_t* destination, size_t from, size_t len)
+        : _destination(destination), _to_skip(from), _to_write(len), _pos{0} {}
+    virtual ~ChunkPrint() {}
+    size_t write(uint8_t c) {
+      if (_to_skip > 0) {
+        _to_skip--;
+        return 1;
+      } else if (_to_write > 0) {
+        _to_write--;
+        _destination[_pos++] = c;
+        return 1;
+      }
+      return 0;
+    }
+    size_t write(const uint8_t* buffer, size_t size) {
+      return this->Print::write(buffer, size);
+    }
+};
+
+class AsyncJsonResponse : public AsyncAbstractResponse {
+  protected:
+#if ARDUINOJSON_VERSION_MAJOR == 5
+    DynamicJsonBuffer _jsonBuffer;
+#elif ARDUINOJSON_VERSION_MAJOR == 6
+    DynamicJsonDocument _jsonBuffer;
+#else
+    JsonDocument _jsonBuffer;
+#endif
+
+    JsonVariant _root;
+    bool _isValid;
+
+  public:
+#if ARDUINOJSON_VERSION_MAJOR == 5
+    AsyncJsonResponse(bool isArray = false) : _isValid{false} {
+      _code = 200;
+      _contentType = JSON_MIMETYPE;
+      if (isArray)
+        _root = _jsonBuffer.createArray();
+      else
+        _root = _jsonBuffer.createObject();
+    }
+#elif ARDUINOJSON_VERSION_MAJOR == 6
+    AsyncJsonResponse(bool isArray = false, size_t maxJsonBufferSize = DYNAMIC_JSON_DOCUMENT_SIZE) : _jsonBuffer(maxJsonBufferSize), _isValid{false} {
+      _code = 200;
+      _contentType = JSON_MIMETYPE;
+      if (isArray)
+        _root = _jsonBuffer.createNestedArray();
+      else
+        _root = _jsonBuffer.createNestedObject();
+    }
+#else
+    AsyncJsonResponse(bool isArray = false) : _isValid{false} {
+      _code = 200;
+      _contentType = JSON_MIMETYPE;
+      if (isArray)
+        _root = _jsonBuffer.add<JsonArray>();
+      else
+        _root = _jsonBuffer.add<JsonObject>();
+    }
+#endif
+
+    ~AsyncJsonResponse() {}
+    JsonVariant& getRoot() { return _root; }
+    bool _sourceValid() const { return _isValid; }
+    size_t setLength() {
+
+#if ARDUINOJSON_VERSION_MAJOR == 5
+      _contentLength = _root.measureLength();
+#else
+      _contentLength = measureJson(_root);
+#endif
+
+      if (_contentLength) {
+        _isValid = true;
+      }
+      return _contentLength;
+    }
+
+    size_t getSize() const { return _jsonBuffer.size(); }
+
+#if ARDUINOJSON_VERSION_MAJOR >= 6
+    bool overflowed() const { return _jsonBuffer.overflowed(); }
+#endif
+
+    size_t _fillBuffer(uint8_t* data, size_t len) {
+      ChunkPrint dest(data, _sentLength, len);
+
+#if ARDUINOJSON_VERSION_MAJOR == 5
+      _root.printTo(dest);
+#else
+      serializeJson(_root, dest);
+#endif
+      return len;
+    }
+};
+
+class PrettyAsyncJsonResponse : public AsyncJsonResponse {
+  public:
+#if ARDUINOJSON_VERSION_MAJOR == 6
+    PrettyAsyncJsonResponse(bool isArray = false, size_t maxJsonBufferSize = DYNAMIC_JSON_DOCUMENT_SIZE) : AsyncJsonResponse{isArray, maxJsonBufferSize} {}
+#else
+    PrettyAsyncJsonResponse(bool isArray = false) : AsyncJsonResponse{isArray} {}
+#endif
+    size_t setLength() {
+#if ARDUINOJSON_VERSION_MAJOR == 5
+      _contentLength = _root.measurePrettyLength();
+#else
+      _contentLength = measureJsonPretty(_root);
+#endif
+      if (_contentLength) {
+        _isValid = true;
+      }
+      return _contentLength;
+    }
+    size_t _fillBuffer(uint8_t* data, size_t len) {
+      ChunkPrint dest(data, _sentLength, len);
+#if ARDUINOJSON_VERSION_MAJOR == 5
+      _root.prettyPrintTo(dest);
+#else
+      serializeJsonPretty(_root, dest);
+#endif
+      return len;
+    }
+};
+
+typedef std::function<void(AsyncWebServerRequest* request, JsonVariant& json)> ArJsonRequestHandlerFunction;
+
+class AsyncCallbackJsonWebHandler : public AsyncWebHandler {
+  private:
+  protected:
+    const String _uri;
+    WebRequestMethodComposite _method;
+    ArJsonRequestHandlerFunction _onRequest;
+    size_t _contentLength;
+#if ARDUINOJSON_VERSION_MAJOR == 6
+    const size_t maxJsonBufferSize;
+#endif
+    size_t _maxContentLength;
+
+  public:
+#if ARDUINOJSON_VERSION_MAJOR == 6
+    AsyncCallbackJsonWebHandler(const String& uri, ArJsonRequestHandlerFunction onRequest, size_t maxJsonBufferSize = DYNAMIC_JSON_DOCUMENT_SIZE)
+        : _uri(uri), _method(HTTP_GET | HTTP_POST | HTTP_PUT | HTTP_PATCH), _onRequest(onRequest), maxJsonBufferSize(maxJsonBufferSize), _maxContentLength(16384) {}
+#else
+    AsyncCallbackJsonWebHandler(const String& uri, ArJsonRequestHandlerFunction onRequest)
+        : _uri(uri), _method(HTTP_GET | HTTP_POST | HTTP_PUT | HTTP_PATCH), _onRequest(onRequest), _maxContentLength(16384) {}
+#endif
+
+    void setMethod(WebRequestMethodComposite method) { _method = method; }
+    void setMaxContentLength(int maxContentLength) { _maxContentLength = maxContentLength; }
+    void onRequest(ArJsonRequestHandlerFunction fn) { _onRequest = fn; }
+
+    virtual bool canHandle(AsyncWebServerRequest* request) override final {
+      if (!_onRequest)
+        return false;
+
+      WebRequestMethodComposite request_method = request->method();
+      if (!(_method & request_method))
+        return false;
+
+      if (_uri.length() && (_uri != request->url() && !request->url().startsWith(_uri + "/")))
+        return false;
+
+      if (request_method != HTTP_GET && !request->contentType().equalsIgnoreCase(JSON_MIMETYPE))
+        return false;
+
+      request->addInterestingHeader("ANY");
+      return true;
+    }
+
+    virtual void handleRequest(AsyncWebServerRequest* request) override final {
+      if((_username != "" && _password != "") && !request->authenticate(_username.c_str(), _password.c_str()))
+        return request->requestAuthentication();
+      if (_onRequest) {
+        if (request->method() == HTTP_GET) {
+          JsonVariant json;
+          _onRequest(request, json);
+          return;
+        } else if (request->_tempObject != NULL) {
+
+#if ARDUINOJSON_VERSION_MAJOR == 5
+          DynamicJsonBuffer jsonBuffer;
+          JsonVariant json = jsonBuffer.parse((uint8_t*)(request->_tempObject));
+          if (json.success()) {
+#elif ARDUINOJSON_VERSION_MAJOR == 6
+          DynamicJsonDocument jsonBuffer(this->maxJsonBufferSize);
+          DeserializationError error = deserializeJson(jsonBuffer, (uint8_t*)(request->_tempObject));
+          if (!error) {
+            JsonVariant json = jsonBuffer.as<JsonVariant>();
+#else
+          JsonDocument jsonBuffer;
+          DeserializationError error = deserializeJson(jsonBuffer, (uint8_t*)(request->_tempObject));
+          if (!error) {
+            JsonVariant json = jsonBuffer.as<JsonVariant>();
+#endif
+
+            _onRequest(request, json);
+            return;
+          }
+        }
+        request->send(_contentLength > _maxContentLength ? 413 : 400);
+      } else {
+        request->send(500);
+      }
+    }
+    virtual void handleUpload(__unused AsyncWebServerRequest* request, __unused const String& filename, __unused size_t index, __unused uint8_t* data, __unused size_t len, __unused bool final) override final {
+    }
+    virtual void handleBody(AsyncWebServerRequest* request, uint8_t* data, size_t len, size_t index, size_t total) override final {
+      if (_onRequest) {
+        _contentLength = total;
+        if (total > 0 && request->_tempObject == NULL && total < _maxContentLength) {
+          request->_tempObject = malloc(total);
+        }
+        if (request->_tempObject != NULL) {
+          memcpy((uint8_t*)(request->_tempObject) + index, data, len);
+        }
+      }
+    }
+    virtual bool isRequestHandlerTrivial() override final { return _onRequest ? false : true; }
+};
+#endif

libraries/ESPAsyncWebServer/src/AsyncWebSocket.h

@@ -0,0 +1,354 @@
+/*
+  Asynchronous WebServer library for Espressif MCUs
+
+  Copyright (c) 2016 Hristo Gochkov. All rights reserved.
+  This file is part of the esp8266 core for Arduino environment.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+#ifndef ASYNCWEBSOCKET_H_
+#define ASYNCWEBSOCKET_H_
+
+#include <Arduino.h>
+#ifdef ESP32
+#include <AsyncTCP.h>
+#ifndef WS_MAX_QUEUED_MESSAGES
+#define WS_MAX_QUEUED_MESSAGES 32
+#endif
+#else
+#include <ESPAsyncTCP.h>
+#ifndef WS_MAX_QUEUED_MESSAGES
+#define WS_MAX_QUEUED_MESSAGES 8
+#endif
+#endif
+#include <ESPAsyncWebServer.h>
+
+#include "AsyncWebSynchronization.h"
+
+#include <list>
+#include <deque>
+#include <memory>
+
+#ifdef ESP8266
+#include <Hash.h>
+#ifdef CRYPTO_HASH_h // include Hash.h from espressif framework if the first include was from the crypto library
+#include <../src/Hash.h>
+#endif
+#endif
+
+#ifdef ESP32
+#define DEFAULT_MAX_WS_CLIENTS 8
+#else
+#define DEFAULT_MAX_WS_CLIENTS 4
+#endif
+
+class AsyncWebSocket;
+class AsyncWebSocketResponse;
+class AsyncWebSocketClient;
+class AsyncWebSocketControl;
+
+typedef struct {
+    /** Message type as defined by enum AwsFrameType.
+     * Note: Applications will only see WS_TEXT and WS_BINARY.
+     * All other types are handled by the library. */
+    uint8_t message_opcode;
+    /** Frame number of a fragmented message. */
+    uint32_t num;
+    /** Is this the last frame in a fragmented message ?*/
+    uint8_t final;
+    /** Is this frame masked? */
+    uint8_t masked;
+    /** Message type as defined by enum AwsFrameType.
+     * This value is the same as message_opcode for non-fragmented
+     * messages, but may also be WS_CONTINUATION in a fragmented message. */
+    uint8_t opcode;
+    /** Length of the current frame.
+     * This equals the total length of the message if num == 0 && final == true */
+    uint64_t len;
+    /** Mask key */
+    uint8_t mask[4];
+    /** Offset of the data inside the current frame. */
+    uint64_t index;
+} AwsFrameInfo;
+
+typedef enum { WS_DISCONNECTED, WS_CONNECTED, WS_DISCONNECTING } AwsClientStatus;
+typedef enum { WS_CONTINUATION, WS_TEXT, WS_BINARY, WS_DISCONNECT = 0x08, WS_PING, WS_PONG } AwsFrameType;
+typedef enum { WS_MSG_SENDING, WS_MSG_SENT, WS_MSG_ERROR } AwsMessageStatus;
+typedef enum { WS_EVT_CONNECT, WS_EVT_DISCONNECT, WS_EVT_PONG, WS_EVT_ERROR, WS_EVT_DATA } AwsEventType;
+
+class AsyncWebSocketMessageBuffer {
+  friend AsyncWebSocket;
+  friend AsyncWebSocketClient;
+
+  private:
+    std::shared_ptr<std::vector<uint8_t>> _buffer;
+
+  public:
+    AsyncWebSocketMessageBuffer();
+    AsyncWebSocketMessageBuffer(size_t size);
+    AsyncWebSocketMessageBuffer(uint8_t* data, size_t size);
+    ~AsyncWebSocketMessageBuffer();
+    bool reserve(size_t size);
+    uint8_t* get() { return _buffer->data(); }
+    size_t length() const { return _buffer->size(); }
+};
+
+class AsyncWebSocketMessage
+{
+private:
+    std::shared_ptr<std::vector<uint8_t>> _WSbuffer;
+    uint8_t _opcode{WS_TEXT};
+    bool _mask{false};
+    AwsMessageStatus _status{WS_MSG_ERROR};
+    size_t _sent{};
+    size_t _ack{};
+    size_t _acked{};
+
+public:
+    AsyncWebSocketMessage(std::shared_ptr<std::vector<uint8_t>> buffer, uint8_t opcode=WS_TEXT, bool mask=false);
+
+    bool finished() const { return _status != WS_MSG_SENDING; }
+    bool betweenFrames() const { return _acked == _ack; }
+
+    void ack(size_t len, uint32_t time);
+    size_t send(AsyncClient *client);
+};
+
+class AsyncWebSocketClient {
+  private:
+    AsyncClient *_client;
+    AsyncWebSocket *_server;
+    uint32_t _clientId;
+    AwsClientStatus _status;
+
+    AsyncWebLock _lock;
+
+    std::deque<AsyncWebSocketControl> _controlQueue;
+    std::deque<AsyncWebSocketMessage> _messageQueue;
+    bool closeWhenFull = true;
+
+    uint8_t _pstate;
+    AwsFrameInfo _pinfo;
+
+    uint32_t _lastMessageTime;
+    uint32_t _keepAlivePeriod;
+
+    void _queueControl(uint8_t opcode, const uint8_t *data=NULL, size_t len=0, bool mask=false);
+    void _queueMessage(std::shared_ptr<std::vector<uint8_t>> buffer, uint8_t opcode=WS_TEXT, bool mask=false);
+    void _runQueue();
+    void _clearQueue();
+
+  public:
+    void *_tempObject;
+
+    AsyncWebSocketClient(AsyncWebServerRequest *request, AsyncWebSocket *server);
+    ~AsyncWebSocketClient();
+
+    //client id increments for the given server
+    uint32_t id() const { return _clientId; }
+    AwsClientStatus status() const { return _status; }
+    AsyncClient* client() { return _client; }
+    const AsyncClient* client() const { return _client; }
+    AsyncWebSocket *server(){ return _server; }
+    const AsyncWebSocket *server() const { return _server; }
+    AwsFrameInfo const &pinfo() const { return _pinfo; }
+
+    //  - If "true" (default), the connection will be closed if the message queue is full.
+    // This is the default behavior in yubox-node-org, which is not silently discarding messages but instead closes the connection.
+    // The big issue with this behavior is  that is can cause the UI to automatically re-create a new WS connection, which can be filled again, 
+    // and so on, causing a resource exhaustion.
+    // 
+    // - If "false", the incoming message will be discarded if the queue is full.
+    // This is the default behavior in the original ESPAsyncWebServer library from me-no-dev.
+    // This behavior allows the best performance at the expense of unreliable message delivery in case the queue is full (some messages may be lost).
+    // 
+    // - In any case, when the queue is full, a message is logged.
+    // - IT is recommended to use the methods queueIsFull(), availableForWriteAll(), availableForWrite(clientId) to check if the queue is full before sending a message.
+    // 
+    // Usage:
+    //  - can be set in the onEvent listener when connecting (event type is: WS_EVT_CONNECT)
+    // 
+    // Use cases:, 
+    // - if using websocket to send logging messages, maybe some loss is acceptable.
+    // - But if using websocket to send UI update messages, maybe the connection should be closed and the UI redrawn.
+    void setCloseClientOnQueueFull(bool close) { closeWhenFull = close; }
+    bool willCloseClientOnQueueFull() const { return closeWhenFull; }
+
+    IPAddress remoteIP() const;
+    uint16_t  remotePort() const;
+
+    bool shouldBeDeleted() const { return !_client; }
+
+    //control frames
+    void close(uint16_t code=0, const char * message=NULL);
+    void ping(const uint8_t *data=NULL, size_t len=0);
+
+    //set auto-ping period in seconds. disabled if zero (default)
+    void keepAlivePeriod(uint16_t seconds){
+      _keepAlivePeriod = seconds * 1000;
+    }
+    uint16_t keepAlivePeriod(){
+      return (uint16_t)(_keepAlivePeriod / 1000);
+    }
+
+    //data packets
+    void message(std::shared_ptr<std::vector<uint8_t>> buffer, uint8_t opcode=WS_TEXT, bool mask=false) { _queueMessage(buffer, opcode, mask); }
+    bool queueIsFull() const;
+    size_t queueLen() const;
+
+    size_t printf(const char *format, ...)  __attribute__ ((format (printf, 2, 3)));
+#ifndef ESP32
+    size_t printf_P(PGM_P formatP, ...)  __attribute__ ((format (printf, 2, 3)));
+#endif
+
+    void text(std::shared_ptr<std::vector<uint8_t>> buffer);
+    void text(const uint8_t *message, size_t len);
+    void text(const char *message, size_t len);
+    void text(const char *message);
+    void text(const String &message);
+    void text(const __FlashStringHelper *message);
+    void text(AsyncWebSocketMessageBuffer *buffer); 
+
+    void binary(std::shared_ptr<std::vector<uint8_t>> buffer);
+    void binary(const uint8_t *message, size_t len);
+    void binary(const char * message, size_t len);
+    void binary(const char * message);
+    void binary(const String &message);
+    void binary(const __FlashStringHelper *message, size_t len);
+    void binary(AsyncWebSocketMessageBuffer *buffer); 
+
+    bool canSend() const;
+
+    //system callbacks (do not call)
+    void _onAck(size_t len, uint32_t time);
+    void _onError(int8_t);
+    void _onPoll();
+    void _onTimeout(uint32_t time);
+    void _onDisconnect();
+    void _onData(void *pbuf, size_t plen);
+};
+
+typedef std::function<bool(AsyncWebServerRequest *request)> AwsHandshakeHandler;
+typedef std::function<void(AsyncWebSocket * server, AsyncWebSocketClient * client, AwsEventType type, void * arg, uint8_t *data, size_t len)> AwsEventHandler;
+
+//WebServer Handler implementation that plays the role of a socket server
+class AsyncWebSocket: public AsyncWebHandler {
+  private:
+    String _url;
+    std::list<AsyncWebSocketClient> _clients;
+    uint32_t _cNextId;
+    AwsEventHandler _eventHandler;
+	AwsHandshakeHandler _handshakeHandler;
+    bool _enabled;
+    AsyncWebLock _lock;
+
+  public:
+    AsyncWebSocket(const String& url);
+    ~AsyncWebSocket();
+    const char * url() const { return _url.c_str(); }
+    void enable(bool e){ _enabled = e; }
+    bool enabled() const { return _enabled; }
+    bool availableForWriteAll();
+    bool availableForWrite(uint32_t id);
+
+    size_t count() const;
+    AsyncWebSocketClient * client(uint32_t id);
+    bool hasClient(uint32_t id){ return client(id) != NULL; }
+
+    void close(uint32_t id, uint16_t code=0, const char * message=NULL);
+    void closeAll(uint16_t code=0, const char * message=NULL);
+    void cleanupClients(uint16_t maxClients = DEFAULT_MAX_WS_CLIENTS);
+
+    void ping(uint32_t id, const uint8_t *data=NULL, size_t len=0);
+    void pingAll(const uint8_t *data=NULL, size_t len=0); //  done
+
+    void text(uint32_t id, const uint8_t * message, size_t len);
+    void text(uint32_t id, const char *message, size_t len);
+    void text(uint32_t id, const char *message);
+    void text(uint32_t id, const String &message);
+    void text(uint32_t id, const __FlashStringHelper *message);
+    void text(uint32_t id, AsyncWebSocketMessageBuffer *buffer);
+    void text(uint32_t id, std::shared_ptr<std::vector<uint8_t>> buffer);
+
+    void textAll(const uint8_t *message, size_t len);
+    void textAll(const char * message, size_t len);
+    void textAll(const char * message);
+    void textAll(const String &message);
+    void textAll(const __FlashStringHelper *message);
+    void textAll(AsyncWebSocketMessageBuffer *buffer);
+    void textAll(std::shared_ptr<std::vector<uint8_t>> buffer);
+
+    void binary(uint32_t id, const uint8_t *message, size_t len);
+    void binary(uint32_t id, const char *message, size_t len);
+    void binary(uint32_t id, const char *message);
+    void binary(uint32_t id, const String &message);
+    void binary(uint32_t id, const __FlashStringHelper *message, size_t len);
+    void binary(uint32_t id, AsyncWebSocketMessageBuffer *buffer);
+    void binary(uint32_t id, std::shared_ptr<std::vector<uint8_t>> buffer);
+
+    void binaryAll(const uint8_t *message, size_t len);
+    void binaryAll(const char *message, size_t len);
+    void binaryAll(const char *message);
+    void binaryAll(const String &message);
+    void binaryAll(const __FlashStringHelper *message, size_t len);
+    void binaryAll(AsyncWebSocketMessageBuffer *buffer);
+    void binaryAll(std::shared_ptr<std::vector<uint8_t>> buffer);
+
+    size_t printf(uint32_t id, const char *format, ...)  __attribute__ ((format (printf, 3, 4)));
+    size_t printfAll(const char *format, ...)  __attribute__ ((format (printf, 2, 3)));
+#ifndef ESP32
+    size_t printf_P(uint32_t id, PGM_P formatP, ...)  __attribute__ ((format (printf, 3, 4)));
+#endif
+    size_t printfAll_P(PGM_P formatP, ...)  __attribute__ ((format (printf, 2, 3)));
+
+    //event listener
+    void onEvent(AwsEventHandler handler){
+      _eventHandler = handler;
+    }
+
+    // Handshake Handler
+    void handleHandshake(AwsHandshakeHandler handler){
+      _handshakeHandler = handler; 
+    }
+	
+    //system callbacks (do not call)
+    uint32_t _getNextId(){ return _cNextId++; }
+    AsyncWebSocketClient *_newClient(AsyncWebServerRequest *request);
+    void _handleEvent(AsyncWebSocketClient * client, AwsEventType type, void * arg, uint8_t *data, size_t len);
+    virtual bool canHandle(AsyncWebServerRequest *request) override final;
+    virtual void handleRequest(AsyncWebServerRequest *request) override final;
+
+
+    //  messagebuffer functions/objects. 
+    AsyncWebSocketMessageBuffer * makeBuffer(size_t size = 0); 
+    AsyncWebSocketMessageBuffer * makeBuffer(uint8_t * data, size_t size); 
+
+    const std::list<AsyncWebSocketClient> &getClients() const { return _clients; }
+};
+
+//WebServer response to authenticate the socket and detach the tcp client from the web server request
+class AsyncWebSocketResponse: public AsyncWebServerResponse {
+  private:
+    String _content;
+    AsyncWebSocket *_server;
+  public:
+    AsyncWebSocketResponse(const String& key, AsyncWebSocket *server);
+    void _respond(AsyncWebServerRequest *request);
+    size_t _ack(AsyncWebServerRequest *request, size_t len, uint32_t time);
+    bool _sourceValid() const { return true; }
+};
+
+
+#endif /* ASYNCWEBSOCKET_H_ */

libraries/ESPAsyncWebServer/src/AsyncWebSynchronization.h

@@ -0,0 +1,134 @@
+#ifndef ASYNCWEBSYNCHRONIZATION_H_
+#define ASYNCWEBSYNCHRONIZATION_H_
+
+// Synchronisation is only available on ESP32, as the ESP8266 isn't using FreeRTOS by default
+
+#include <ESPAsyncWebServer.h>
+
+#ifdef ESP32
+
+// This is the ESP32 version of the Sync Lock, using the FreeRTOS Semaphore
+// Modified 'AsyncWebLock' to just only use mutex since pxCurrentTCB is not
+// always available. According to example by Arjan Filius, changed name,
+// added unimplemented version for ESP8266
+class AsyncPlainLock
+{
+private:
+  SemaphoreHandle_t _lock;
+
+public:
+  AsyncPlainLock() {
+    _lock = xSemaphoreCreateBinary();
+    // In this fails, the system is likely that much out of memory that
+    // we should abort anyways. If assertions are disabled, nothing is lost..
+    assert(_lock);
+    xSemaphoreGive(_lock);
+  }
+
+  ~AsyncPlainLock() {
+    vSemaphoreDelete(_lock);
+  }
+
+  bool lock() const {
+      xSemaphoreTake(_lock, portMAX_DELAY);
+      return true;
+  }
+
+  void unlock() const {
+    xSemaphoreGive(_lock);
+  }
+};
+
+// This is the ESP32 version of the Sync Lock, using the FreeRTOS Semaphore
+class AsyncWebLock
+{
+private:
+    SemaphoreHandle_t _lock;
+    mutable TaskHandle_t _lockedBy{};
+
+public:
+    AsyncWebLock()
+    {
+        _lock = xSemaphoreCreateBinary();
+        // In this fails, the system is likely that much out of memory that
+        // we should abort anyways. If assertions are disabled, nothing is lost..
+        assert(_lock);
+        _lockedBy = NULL;
+        xSemaphoreGive(_lock);
+    }
+
+    ~AsyncWebLock() {
+        vSemaphoreDelete(_lock);
+    }
+
+    bool lock() const {
+        const auto currentTask = xTaskGetCurrentTaskHandle();
+        if (_lockedBy != currentTask) {
+            xSemaphoreTake(_lock, portMAX_DELAY);
+            _lockedBy = currentTask;
+            return true;
+        }
+        return false;
+    }
+
+    void unlock() const {
+        _lockedBy = NULL;
+        xSemaphoreGive(_lock);
+    }
+};
+
+#else
+
+// This is the 8266 version of the Sync Lock which is currently unimplemented
+class AsyncWebLock
+{
+
+public:
+  AsyncWebLock() {
+  }
+
+  ~AsyncWebLock() {
+  }
+
+  bool lock() const {
+    return false;
+  }
+
+  void unlock() const {
+  }
+};
+
+// Same for AsyncPlainLock, for ESP8266 this is just the unimplemented version above. 
+using AsyncPlainLock = AsyncWebLock;
+
+#endif
+
+class AsyncWebLockGuard
+{
+private:
+  const AsyncWebLock *_lock;
+
+public:
+  AsyncWebLockGuard(const AsyncWebLock &l) {
+    if (l.lock()) {
+      _lock = &l;
+    } else {
+      _lock = NULL;
+    }
+  }
+
+  ~AsyncWebLockGuard() {
+    if (_lock) {
+      _lock->unlock();
+    }
+  }
+
+  void unlock() {
+    if (_lock) {
+      _lock->unlock();
+      _lock = NULL;
+    }
+  }
+};
+
+#endif // ASYNCWEBSYNCHRONIZATION_H_

libraries/ESPAsyncWebServer/src/ESPAsyncWebServer.h

@@ -0,0 +1,501 @@
+/*
+  Asynchronous WebServer library for Espressif MCUs
+
+  Copyright (c) 2016 Hristo Gochkov. All rights reserved.
+  This file is part of the esp8266 core for Arduino environment.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+#ifndef _ESPAsyncWebServer_H_
+#define _ESPAsyncWebServer_H_
+
+#include "Arduino.h"
+
+#include <functional>
+#include <list>
+#include <vector>
+#include "FS.h"
+
+#include "StringArray.h"
+
+#ifdef ESP32
+#include <WiFi.h>
+#include <AsyncTCP.h>
+#elif defined(ESP8266)
+#include <ESP8266WiFi.h>
+#include <ESPAsyncTCP.h>
+#else
+#error Platform not supported
+#endif
+
+#define ASYNCWEBSERVER_VERSION "2.10.4"
+#define ASYNCWEBSERVER_VERSION_MAJOR 2
+#define ASYNCWEBSERVER_VERSION_MINOR 10
+#define ASYNCWEBSERVER_VERSION_REVISION 4
+#define ASYNCWEBSERVER_FORK_mathieucarbou
+
+#ifdef ASYNCWEBSERVER_REGEX
+#define ASYNCWEBSERVER_REGEX_ATTRIBUTE
+#else
+#define ASYNCWEBSERVER_REGEX_ATTRIBUTE __attribute__((warning("ASYNCWEBSERVER_REGEX not defined")))
+#endif
+
+class AsyncWebServer;
+class AsyncWebServerRequest;
+class AsyncWebServerResponse;
+class AsyncWebHeader;
+class AsyncWebParameter;
+class AsyncWebRewrite;
+class AsyncWebHandler;
+class AsyncStaticWebHandler;
+class AsyncCallbackWebHandler;
+class AsyncResponseStream;
+
+#ifndef WEBSERVER_H
+typedef enum {
+  HTTP_GET     = 0b00000001,
+  HTTP_POST    = 0b00000010,
+  HTTP_DELETE  = 0b00000100,
+  HTTP_PUT     = 0b00001000,
+  HTTP_PATCH   = 0b00010000,
+  HTTP_HEAD    = 0b00100000,
+  HTTP_OPTIONS = 0b01000000,
+  HTTP_ANY     = 0b01111111,
+} WebRequestMethod;
+#endif
+
+#ifndef HAVE_FS_FILE_OPEN_MODE
+namespace fs {
+    class FileOpenMode {
+    public:
+        static const char *read;
+        static const char *write;
+        static const char *append;
+    };
+};
+#else
+#include "FileOpenMode.h"
+#endif
+
+//if this value is returned when asked for data, packet will not be sent and you will be asked for data again
+#define RESPONSE_TRY_AGAIN 0xFFFFFFFF
+
+typedef uint8_t WebRequestMethodComposite;
+typedef std::function<void(void)> ArDisconnectHandler;
+
+/*
+ * PARAMETER :: Chainable object to hold GET/POST and FILE parameters
+ * */
+
+class AsyncWebParameter {
+  private:
+    String _name;
+    String _value;
+    size_t _size;
+    bool _isForm;
+    bool _isFile;
+
+  public:
+
+    AsyncWebParameter(const String& name, const String& value, bool form=false, bool file=false, size_t size=0): _name(name), _value(value), _size(size), _isForm(form), _isFile(file){}
+    const String& name() const { return _name; }
+    const String& value() const { return _value; }
+    size_t size() const { return _size; }
+    bool isPost() const { return _isForm; }
+    bool isFile() const { return _isFile; }
+};
+
+/*
+ * HEADER :: Chainable object to hold the headers
+ * */
+
+class AsyncWebHeader {
+  private:
+    String _name;
+    String _value;
+
+  public:
+    AsyncWebHeader() = default;
+    AsyncWebHeader(const AsyncWebHeader &) = default;
+
+    AsyncWebHeader(const String& name, const String& value): _name(name), _value(value){}
+    AsyncWebHeader(const String& data): _name(), _value(){
+      if(!data) return;
+      int index = data.indexOf(':');
+      if (index < 0) return;
+      _name = data.substring(0, index);
+      _value = data.substring(index + 2);
+    }
+
+    AsyncWebHeader &operator=(const AsyncWebHeader &) = default;
+
+    const String& name() const { return _name; }
+    const String& value() const { return _value; }
+    String toString() const { return _name + F(": ") + _value + F("\r\n"); }
+};
+
+/*
+ * REQUEST :: Each incoming Client is wrapped inside a Request and both live together until disconnect
+ * */
+
+typedef enum { RCT_NOT_USED = -1, RCT_DEFAULT = 0, RCT_HTTP, RCT_WS, RCT_EVENT, RCT_MAX } RequestedConnectionType;
+
+typedef std::function<size_t(uint8_t*, size_t, size_t)> AwsResponseFiller;
+typedef std::function<String(const String&)> AwsTemplateProcessor;
+
+class AsyncWebServerRequest {
+  using File = fs::File;
+  using FS = fs::FS;
+  friend class AsyncWebServer;
+  friend class AsyncCallbackWebHandler;
+  private:
+    AsyncClient* _client;
+    AsyncWebServer* _server;
+    AsyncWebHandler* _handler;
+    AsyncWebServerResponse* _response;
+    std::vector<String> _interestingHeaders;
+    ArDisconnectHandler _onDisconnectfn;
+
+    String _temp;
+    uint8_t _parseState;
+
+    uint8_t _version;
+    WebRequestMethodComposite _method;
+    String _url;
+    String _host;
+    String _contentType;
+    String _boundary;
+    String _authorization;
+    RequestedConnectionType _reqconntype;
+    void _removeNotInterestingHeaders();
+    bool _isDigest;
+    bool _isMultipart;
+    bool _isPlainPost;
+    bool _expectingContinue;
+    size_t _contentLength;
+    size_t _parsedLength;
+
+    std::list<AsyncWebHeader> _headers;
+    AlternativeLinkedList<AsyncWebParameter *> _params;
+    std::vector<String> _pathParams;
+
+    uint8_t _multiParseState;
+    uint8_t _boundaryPosition;
+    size_t _itemStartIndex;
+    size_t _itemSize;
+    String _itemName;
+    String _itemFilename;
+    String _itemType;
+    String _itemValue;
+    uint8_t *_itemBuffer;
+    size_t _itemBufferIndex;
+    bool _itemIsFile;
+
+    void _onPoll();
+    void _onAck(size_t len, uint32_t time);
+    void _onError(int8_t error);
+    void _onTimeout(uint32_t time);
+    void _onDisconnect();
+    void _onData(void *buf, size_t len);
+
+    void _addParam(AsyncWebParameter*);
+    void _addPathParam(const char *param);
+
+    bool _parseReqHead();
+    bool _parseReqHeader();
+    void _parseLine();
+    void _parsePlainPostChar(uint8_t data);
+    void _parseMultipartPostByte(uint8_t data, bool last);
+    void _addGetParams(const String& params);
+
+    void _handleUploadStart();
+    void _handleUploadByte(uint8_t data, bool last);
+    void _handleUploadEnd();
+
+  public:
+    File _tempFile;
+    void *_tempObject;
+
+    AsyncWebServerRequest(AsyncWebServer*, AsyncClient*);
+    ~AsyncWebServerRequest();
+
+    AsyncClient* client(){ return _client; }
+    uint8_t version() const { return _version; }
+    WebRequestMethodComposite method() const { return _method; }
+    const String& url() const { return _url; }
+    const String& host() const { return _host; }
+    const String& contentType() const { return _contentType; }
+    size_t contentLength() const { return _contentLength; }
+    bool multipart() const { return _isMultipart; }
+    const __FlashStringHelper *methodToString() const;
+    const __FlashStringHelper *requestedConnTypeToString() const;
+    RequestedConnectionType requestedConnType() const { return _reqconntype; }
+    bool isExpectedRequestedConnType(RequestedConnectionType erct1, RequestedConnectionType erct2 = RCT_NOT_USED, RequestedConnectionType erct3 = RCT_NOT_USED);
+    void onDisconnect (ArDisconnectHandler fn);
+
+    //hash is the string representation of:
+    // base64(user:pass) for basic or
+    // user:realm:md5(user:realm:pass) for digest
+    bool authenticate(const char * hash);
+    bool authenticate(const char * username, const char * password, const char * realm = NULL, bool passwordIsHash = false);
+    void requestAuthentication(const char * realm = NULL, bool isDigest = true);
+
+    void setHandler(AsyncWebHandler *handler){ _handler = handler; }
+    void addInterestingHeader(const String& name);
+
+    void redirect(const String& url);
+
+    void send(AsyncWebServerResponse *response);
+    void send(int code, const String& contentType=String(), const String& content=String());
+    void send(FS &fs, const String& path, const String& contentType=String(), bool download=false, AwsTemplateProcessor callback=nullptr);
+    void send(File content, const String& path, const String& contentType=String(), bool download=false, AwsTemplateProcessor callback=nullptr);
+    void send(Stream &stream, const String& contentType, size_t len, AwsTemplateProcessor callback=nullptr);
+    void send(const String& contentType, size_t len, AwsResponseFiller callback, AwsTemplateProcessor templateCallback=nullptr);
+    void sendChunked(const String& contentType, AwsResponseFiller callback, AwsTemplateProcessor templateCallback=nullptr);
+    void send_P(int code, const String& contentType, const uint8_t * content, size_t len, AwsTemplateProcessor callback=nullptr);
+    void send_P(int code, const String& contentType, PGM_P content, AwsTemplateProcessor callback=nullptr);
+
+    AsyncWebServerResponse *beginResponse(int code, const String& contentType=String(), const String& content=String());
+    AsyncWebServerResponse *beginResponse(FS &fs, const String& path, const String& contentType=String(), bool download=false, AwsTemplateProcessor callback=nullptr);
+    AsyncWebServerResponse *beginResponse(File content, const String& path, const String& contentType=String(), bool download=false, AwsTemplateProcessor callback=nullptr);
+    AsyncWebServerResponse *beginResponse(Stream &stream, const String& contentType, size_t len, AwsTemplateProcessor callback=nullptr);
+    AsyncWebServerResponse *beginResponse(const String& contentType, size_t len, AwsResponseFiller callback, AwsTemplateProcessor templateCallback=nullptr);
+    AsyncWebServerResponse *beginChunkedResponse(const String& contentType, AwsResponseFiller callback, AwsTemplateProcessor templateCallback=nullptr);
+    AsyncResponseStream *beginResponseStream(const String& contentType, size_t bufferSize=1460);
+    AsyncWebServerResponse *beginResponse_P(int code, const String& contentType, const uint8_t * content, size_t len, AwsTemplateProcessor callback=nullptr);
+    AsyncWebServerResponse *beginResponse_P(int code, const String& contentType, PGM_P content, AwsTemplateProcessor callback=nullptr);
+
+    size_t headers() const;                     // get header count
+    bool hasHeader(const String& name) const;   // check if header exists
+    bool hasHeader(const __FlashStringHelper * data) const;   // check if header exists
+
+    AsyncWebHeader* getHeader(const String& name);
+    const AsyncWebHeader* getHeader(const String& name) const;
+    AsyncWebHeader* getHeader(const __FlashStringHelper * data);
+    const AsyncWebHeader* getHeader(const __FlashStringHelper * data) const;
+    AsyncWebHeader* getHeader(size_t num);
+    const AsyncWebHeader* getHeader(size_t num) const;
+
+    size_t params() const;                      // get arguments count
+    bool hasParam(const String& name, bool post=false, bool file=false) const;
+    bool hasParam(const __FlashStringHelper * data, bool post=false, bool file=false) const;
+
+    AsyncWebParameter* getParam(const String& name, bool post=false, bool file=false) const;
+    AsyncWebParameter* getParam(const __FlashStringHelper * data, bool post, bool file) const;
+    AsyncWebParameter* getParam(size_t num) const;
+
+    size_t args() const { return params(); }     // get arguments count
+    const String& arg(const String& name) const; // get request argument value by name
+    const String& arg(const __FlashStringHelper * data) const; // get request argument value by F(name)
+    const String& arg(size_t i) const;           // get request argument value by number
+    const String& argName(size_t i) const;       // get request argument name by number
+    bool hasArg(const char* name) const;         // check if argument exists
+    bool hasArg(const __FlashStringHelper * data) const;         // check if F(argument) exists
+
+    const String& ASYNCWEBSERVER_REGEX_ATTRIBUTE pathArg(size_t i) const;
+
+    const String& header(const char* name) const;// get request header value by name
+    const String& header(const __FlashStringHelper * data) const;// get request header value by F(name)
+    const String& header(size_t i) const;        // get request header value by number
+    const String& headerName(size_t i) const;    // get request header name by number
+    String urlDecode(const String& text) const;
+};
+
+/*
+ * FILTER :: Callback to filter AsyncWebRewrite and AsyncWebHandler (done by the Server)
+ * */
+
+typedef std::function<bool(AsyncWebServerRequest *request)> ArRequestFilterFunction;
+
+bool ON_STA_FILTER(AsyncWebServerRequest *request);
+
+bool ON_AP_FILTER(AsyncWebServerRequest *request);
+
+/*
+ * REWRITE :: One instance can be handle any Request (done by the Server)
+ * */
+
+class AsyncWebRewrite {
+  protected:
+    String _from;
+    String _toUrl;
+    String _params;
+    ArRequestFilterFunction _filter;
+  public:
+    AsyncWebRewrite(const char* from, const char* to): _from(from), _toUrl(to), _params(String()), _filter(NULL){
+      int index = _toUrl.indexOf('?');
+      if (index > 0) {
+        _params = _toUrl.substring(index +1);
+        _toUrl = _toUrl.substring(0, index);
+      }
+    }
+    virtual ~AsyncWebRewrite(){}
+    AsyncWebRewrite& setFilter(ArRequestFilterFunction fn) { _filter = fn; return *this; }
+    bool filter(AsyncWebServerRequest *request) const { return _filter == NULL || _filter(request); }
+    const String& from(void) const { return _from; }
+    const String& toUrl(void) const { return _toUrl; }
+    const String& params(void) const { return _params; }
+    virtual bool match(AsyncWebServerRequest *request) { return from() == request->url() && filter(request); }
+};
+
+/*
+ * HANDLER :: One instance can be attached to any Request (done by the Server)
+ * */
+
+class AsyncWebHandler {
+  protected:
+    ArRequestFilterFunction _filter;
+    String _username;
+    String _password;
+  public:
+    AsyncWebHandler():_username(""), _password(""){}
+    AsyncWebHandler& setFilter(ArRequestFilterFunction fn) { _filter = fn; return *this; }
+    AsyncWebHandler& setAuthentication(const char *username, const char *password){  _username = String(username);_password = String(password); return *this; };
+    AsyncWebHandler& setAuthentication(const String& username, const String& password){  _username = username;_password = password; return *this; };
+    bool filter(AsyncWebServerRequest *request){ return _filter == NULL || _filter(request); }
+    virtual ~AsyncWebHandler(){}
+    virtual bool canHandle(AsyncWebServerRequest *request __attribute__((unused))){
+      return false;
+    }
+    virtual void handleRequest(AsyncWebServerRequest *request __attribute__((unused))){}
+    virtual void handleUpload(AsyncWebServerRequest *request  __attribute__((unused)), const String& filename __attribute__((unused)), size_t index __attribute__((unused)), uint8_t *data __attribute__((unused)), size_t len __attribute__((unused)), bool final  __attribute__((unused))){}
+    virtual void handleBody(AsyncWebServerRequest *request __attribute__((unused)), uint8_t *data __attribute__((unused)), size_t len __attribute__((unused)), size_t index __attribute__((unused)), size_t total __attribute__((unused))){}
+    virtual bool isRequestHandlerTrivial(){return true;}
+};
+
+/*
+ * RESPONSE :: One instance is created for each Request (attached by the Handler)
+ * */
+
+typedef enum {
+  RESPONSE_SETUP, RESPONSE_HEADERS, RESPONSE_CONTENT, RESPONSE_WAIT_ACK, RESPONSE_END, RESPONSE_FAILED
+} WebResponseState;
+
+class AsyncWebServerResponse {
+  protected:
+    int _code;
+    std::list<AsyncWebHeader> _headers;
+    String _contentType;
+    size_t _contentLength;
+    bool _sendContentLength;
+    bool _chunked;
+    size_t _headLength;
+    size_t _sentLength;
+    size_t _ackedLength;
+    size_t _writtenLength;
+    WebResponseState _state;
+    const char* _responseCodeToString(int code);
+public:
+    static const __FlashStringHelper *responseCodeToString(int code);
+
+  public:
+    AsyncWebServerResponse();
+    virtual ~AsyncWebServerResponse();
+    virtual void setCode(int code);
+    virtual void setContentLength(size_t len);
+    virtual void setContentType(const String& type);
+    virtual void addHeader(const String& name, const String& value);
+    virtual String _assembleHead(uint8_t version);
+    virtual bool _started() const;
+    virtual bool _finished() const;
+    virtual bool _failed() const;
+    virtual bool _sourceValid() const;
+    virtual void _respond(AsyncWebServerRequest *request);
+    virtual size_t _ack(AsyncWebServerRequest *request, size_t len, uint32_t time);
+};
+
+/*
+ * SERVER :: One instance
+ * */
+
+typedef std::function<void(AsyncWebServerRequest *request)> ArRequestHandlerFunction;
+typedef std::function<void(AsyncWebServerRequest *request, const String& filename, size_t index, uint8_t *data, size_t len, bool final)> ArUploadHandlerFunction;
+typedef std::function<void(AsyncWebServerRequest *request, uint8_t *data, size_t len, size_t index, size_t total)> ArBodyHandlerFunction;
+
+class AsyncWebServer {
+  protected:
+    AsyncServer _server;
+    AlternativeLinkedList<AsyncWebRewrite*> _rewrites;
+    AlternativeLinkedList<AsyncWebHandler*> _handlers;
+    AsyncCallbackWebHandler* _catchAllHandler;
+
+  public:
+    AsyncWebServer(uint16_t port);
+    ~AsyncWebServer();
+
+    void begin();
+    void end();
+
+#if ASYNC_TCP_SSL_ENABLED
+    void onSslFileRequest(AcSSlFileHandler cb, void* arg);
+    void beginSecure(const char *cert, const char *private_key_file, const char *password);
+#endif
+
+    AsyncWebRewrite& addRewrite(AsyncWebRewrite* rewrite);
+    bool removeRewrite(AsyncWebRewrite* rewrite);
+    AsyncWebRewrite& rewrite(const char* from, const char* to);
+
+    AsyncWebHandler& addHandler(AsyncWebHandler* handler);
+    bool removeHandler(AsyncWebHandler* handler);
+
+    AsyncCallbackWebHandler& on(const char* uri, ArRequestHandlerFunction onRequest);
+    AsyncCallbackWebHandler& on(const char* uri, WebRequestMethodComposite method, ArRequestHandlerFunction onRequest);
+    AsyncCallbackWebHandler& on(const char* uri, WebRequestMethodComposite method, ArRequestHandlerFunction onRequest, ArUploadHandlerFunction onUpload);
+    AsyncCallbackWebHandler& on(const char* uri, WebRequestMethodComposite method, ArRequestHandlerFunction onRequest, ArUploadHandlerFunction onUpload, ArBodyHandlerFunction onBody);
+
+    AsyncStaticWebHandler& serveStatic(const char* uri, fs::FS& fs, const char* path, const char* cache_control = NULL);
+
+    void onNotFound(ArRequestHandlerFunction fn);  //called when handler is not assigned
+    void onFileUpload(ArUploadHandlerFunction fn); //handle file uploads
+    void onRequestBody(ArBodyHandlerFunction fn); //handle posts with plain body content (JSON often transmitted this way as a request)
+
+    void reset(); //remove all writers and handlers, with onNotFound/onFileUpload/onRequestBody
+
+    void _handleDisconnect(AsyncWebServerRequest *request);
+    void _attachHandler(AsyncWebServerRequest *request);
+    void _rewriteRequest(AsyncWebServerRequest *request);
+};
+
+class DefaultHeaders {
+  using headers_t = std::list<AsyncWebHeader>;
+  headers_t _headers;
+
+public:
+  DefaultHeaders() = default;
+
+  using ConstIterator = headers_t::const_iterator;
+
+  void addHeader(const String& name, const String& value){
+    _headers.emplace_back(name, value);
+  }
+
+  ConstIterator begin() const { return _headers.begin(); }
+  ConstIterator end() const { return _headers.end(); }
+
+  DefaultHeaders(DefaultHeaders const &) = delete;
+  DefaultHeaders &operator=(DefaultHeaders const &) = delete;
+
+  static DefaultHeaders &Instance() {
+    static DefaultHeaders instance;
+    return instance;
+  }
+};
+
+#include "WebResponseImpl.h"
+#include "WebHandlerImpl.h"
+#include "AsyncWebSocket.h"
+#include "AsyncEventSource.h"
+
+#endif /* _AsyncWebServer_H_ */

libraries/ESPAsyncWebServer/src/ESP_Async_WebServer.h

@@ -0,0 +1,2 @@
+// to please Arduino Lint
+#include "ESPAsyncWebServer.h"

libraries/ESPAsyncWebServer/src/StringArray.h

@@ -0,0 +1,174 @@
+/*
+  Asynchronous WebServer library for Espressif MCUs
+
+  Copyright (c) 2016 Hristo Gochkov. All rights reserved.
+  This file is part of the esp8266 core for Arduino environment.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+#ifndef STRINGARRAY_H_
+#define STRINGARRAY_H_
+
+#include "stddef.h"
+#include "WString.h"
+
+template <typename T>
+class AlternativeLinkedListNode {
+    T _value;
+  public:
+    AlternativeLinkedListNode<T>* next;
+    AlternativeLinkedListNode(const T val): _value(val), next(nullptr) {}
+    ~AlternativeLinkedListNode(){}
+    const T& value() const { return _value; };
+    T& value(){ return _value; }
+};
+
+template <typename T, template<typename> class Item = AlternativeLinkedListNode>
+class AlternativeLinkedList {
+  public:
+    typedef Item<T> ItemType;
+    typedef std::function<void(const T&)> OnRemove;
+    typedef std::function<bool(const T&)> Predicate;
+  private:
+    ItemType* _root;
+    OnRemove _onRemove;
+
+    class Iterator {
+      ItemType* _node;
+    public:
+      Iterator(ItemType* current = nullptr) : _node(current) {}
+      Iterator(const Iterator& i) : _node(i._node) {}
+      Iterator& operator ++() { _node = _node->next; return *this; }
+      bool operator != (const Iterator& i) const { return _node != i._node; }
+      const T& operator * () const { return _node->value(); }
+      const T* operator -> () const { return &_node->value(); }
+    };
+    
+  public:
+    typedef const Iterator ConstIterator;
+    ConstIterator begin() const { return ConstIterator(_root); }
+    ConstIterator end() const { return ConstIterator(nullptr); }
+
+    AlternativeLinkedList(OnRemove onRemove) : _root(nullptr), _onRemove(onRemove) {}
+    ~AlternativeLinkedList(){}
+    void add(const T& t){
+      auto it = new ItemType(t);
+      if(!_root){
+        _root = it;
+      } else {
+        auto i = _root;
+        while(i->next) i = i->next;
+        i->next = it;
+      }
+    }
+    T& front() const {
+      return _root->value();
+    }
+    
+    bool isEmpty() const {
+      return _root == nullptr;
+    }
+    size_t length() const {
+      size_t i = 0;
+      auto it = _root;
+      while(it){
+        i++;
+        it = it->next;
+      }
+      return i;
+    }
+    size_t count_if(Predicate predicate) const {
+      size_t i = 0;
+      auto it = _root;
+      while(it){
+        if (!predicate){
+          i++;
+        }
+        else if (predicate(it->value())) {
+          i++;
+        }
+        it = it->next;
+      }
+      return i;
+    }
+    const T* nth(size_t N) const {
+      size_t i = 0;
+      auto it = _root;
+      while(it){
+        if(i++ == N)
+          return &(it->value());
+        it = it->next;
+      }
+      return nullptr;
+    }
+    bool remove(const T& t){
+      auto it = _root;
+      auto pit = _root;
+      while(it){
+        if(it->value() == t){
+          if(it == _root){
+            _root = _root->next;
+          } else {
+            pit->next = it->next;
+          }
+          
+          if (_onRemove) {
+            _onRemove(it->value());
+          }
+          
+          delete it;
+          return true;
+        }
+        pit = it;
+        it = it->next;
+      }
+      return false;
+    }
+    bool remove_first(Predicate predicate){
+      auto it = _root;
+      auto pit = _root;
+      while(it){
+        if(predicate(it->value())){
+          if(it == _root){
+            _root = _root->next;
+          } else {
+            pit->next = it->next;
+          }
+          if (_onRemove) {
+            _onRemove(it->value());
+          }
+          delete it;
+          return true;
+        }
+        pit = it;
+        it = it->next;
+      }
+      return false;
+    }
+    
+    void free(){
+      while(_root != nullptr){
+        auto it = _root;
+        _root = _root->next;
+        if (_onRemove) {
+          _onRemove(it->value());
+        }
+        delete it;
+      }
+      _root = nullptr;
+    }
+};
+
+#endif /* STRINGARRAY_H_ */

libraries/ESPAsyncWebServer/src/WebAuthentication.cpp

@@ -0,0 +1,247 @@
+/*
+  Asynchronous WebServer library for Espressif MCUs
+
+  Copyright (c) 2016 Hristo Gochkov. All rights reserved.
+  This file is part of the esp8266 core for Arduino environment.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+#include "WebAuthentication.h"
+#include <libb64/cencode.h>
+#ifdef ESP32
+#include "mbedtls/md5.h"
+#else
+#include "md5.h"
+#endif
+
+
+// Basic Auth hash = base64("username:password")
+
+bool checkBasicAuthentication(const char * hash, const char * username, const char * password){
+  if(username == NULL || password == NULL || hash == NULL)
+    return false;
+
+  size_t toencodeLen = strlen(username)+strlen(password)+1;
+  size_t encodedLen = base64_encode_expected_len(toencodeLen);
+  if(strlen(hash) != encodedLen)
+// Fix from https://github.com/me-no-dev/ESPAsyncWebServer/issues/667
+#ifdef ARDUINO_ARCH_ESP32
+    if(strlen(hash) != encodedLen)
+#else
+    if (strlen(hash) != encodedLen - 1)
+#endif
+    return false;
+
+  char *toencode = new char[toencodeLen+1];
+  if(toencode == NULL){
+    return false;
+  }
+  char *encoded = new char[base64_encode_expected_len(toencodeLen)+1];
+  if(encoded == NULL){
+    delete[] toencode;
+    return false;
+  }
+  sprintf_P(toencode, PSTR("%s:%s"), username, password);
+  if(base64_encode_chars(toencode, toencodeLen, encoded) > 0 && memcmp(hash, encoded, encodedLen) == 0){
+    delete[] toencode;
+    delete[] encoded;
+    return true;
+  }
+  delete[] toencode;
+  delete[] encoded;
+  return false;
+}
+
+static bool getMD5(uint8_t * data, uint16_t len, char * output){//33 bytes or more
+#ifdef ESP32
+    mbedtls_md5_context _ctx;
+#else
+    md5_context_t _ctx;
+#endif
+  uint8_t i;
+  uint8_t * _buf = (uint8_t*)malloc(16);
+  if(_buf == NULL)
+    return false;
+  memset(_buf, 0x00, 16);
+#ifdef ESP32
+  mbedtls_md5_init(&_ctx);
+#if ESP_IDF_VERSION_MAJOR == 5
+  mbedtls_md5_starts(&_ctx);
+  mbedtls_md5_update(&_ctx, data, len);
+  mbedtls_md5_finish(&_ctx, _buf);
+#else
+  mbedtls_md5_starts_ret(&_ctx);
+  mbedtls_md5_update_ret(&_ctx, data, len);
+  mbedtls_md5_finish_ret(&_ctx, _buf);
+#endif
+#else
+  MD5Init(&_ctx);
+  MD5Update(&_ctx, data, len);
+  MD5Final(_buf, &_ctx);
+#endif
+  for(i = 0; i < 16; i++) {
+    sprintf_P(output + (i * 2), PSTR("%02x"), _buf[i]);
+  }
+  free(_buf);
+  return true;
+}
+
+static String genRandomMD5(){
+#ifdef ESP8266
+  uint32_t r = RANDOM_REG32;
+#else
+  uint32_t r = rand();
+#endif
+  char * out = (char*)malloc(33);
+  if(out == NULL || !getMD5((uint8_t*)(&r), 4, out))
+    return emptyString;
+  String res = String(out);
+  free(out);
+  return res;
+}
+
+static String stringMD5(const String& in){
+  char * out = (char*)malloc(33);
+  if(out == NULL || !getMD5((uint8_t*)(in.c_str()), in.length(), out))
+    return emptyString;
+  String res = String(out);
+  free(out);
+  return res;
+}
+
+String generateDigestHash(const char * username, const char * password, const char * realm){
+  if(username == NULL || password == NULL || realm == NULL){
+    return emptyString;
+  }
+  char * out = (char*)malloc(33);
+  String res = String(username);
+  res += ':';
+  res.concat(realm);
+  res += ':';
+  String in = res;
+  in.concat(password);
+  if(out == NULL || !getMD5((uint8_t*)(in.c_str()), in.length(), out))
+    return emptyString;
+  res.concat(out);
+  free(out);
+  return res;
+}
+
+String requestDigestAuthentication(const char * realm){
+  String header = F("realm=\"");
+  if(realm == NULL)
+    header.concat(F("asyncesp"));
+  else
+    header.concat(realm);
+  header.concat(F("\", qop=\"auth\", nonce=\""));
+  header.concat(genRandomMD5());
+  header.concat(F("\", opaque=\""));
+  header.concat(genRandomMD5());
+  header += '"';
+  return header;
+}
+
+bool checkDigestAuthentication(const char * header, const __FlashStringHelper *method, const char * username, const char * password, const char * realm, bool passwordIsHash, const char * nonce, const char * opaque, const char * uri){
+  if(username == NULL || password == NULL || header == NULL || method == NULL){
+    //os_printf("AUTH FAIL: missing requred fields\n");
+    return false;
+  }
+
+  String myHeader = String(header);
+  int nextBreak = myHeader.indexOf(',');
+  if(nextBreak < 0){
+    //os_printf("AUTH FAIL: no variables\n");
+    return false;
+  }
+
+  String myUsername = String();
+  String myRealm = String();
+  String myNonce = String();
+  String myUri = String();
+  String myResponse = String();
+  String myQop = String();
+  String myNc = String();
+  String myCnonce = String();
+
+  myHeader += F(", ");
+  do {
+    String avLine = myHeader.substring(0, nextBreak);
+    avLine.trim();
+    myHeader = myHeader.substring(nextBreak+1);
+    nextBreak = myHeader.indexOf(',');
+
+    int eqSign = avLine.indexOf('=');
+    if(eqSign < 0){
+      //os_printf("AUTH FAIL: no = sign\n");
+      return false;
+    }
+    String varName = avLine.substring(0, eqSign);
+    avLine = avLine.substring(eqSign + 1);
+    if(avLine.startsWith(String('"'))){
+      avLine = avLine.substring(1, avLine.length() - 1);
+    }
+
+    if(varName.equals(F("username"))){
+      if(!avLine.equals(username)){
+        //os_printf("AUTH FAIL: username\n");
+        return false;
+      }
+      myUsername = avLine;
+    } else if(varName.equals(F("realm"))){
+      if(realm != NULL && !avLine.equals(realm)){
+        //os_printf("AUTH FAIL: realm\n");
+        return false;
+      }
+      myRealm = avLine;
+    } else if(varName.equals(F("nonce"))){
+      if(nonce != NULL && !avLine.equals(nonce)){
+        //os_printf("AUTH FAIL: nonce\n");
+        return false;
+      }
+      myNonce = avLine;
+    } else if(varName.equals(F("opaque"))){
+      if(opaque != NULL && !avLine.equals(opaque)){
+        //os_printf("AUTH FAIL: opaque\n");
+        return false;
+      }
+    } else if(varName.equals(F("uri"))){
+      if(uri != NULL && !avLine.equals(uri)){
+        //os_printf("AUTH FAIL: uri\n");
+        return false;
+      }
+      myUri = avLine;
+    } else if(varName.equals(F("response"))){
+      myResponse = avLine;
+    } else if(varName.equals(F("qop"))){
+      myQop = avLine;
+    } else if(varName.equals(F("nc"))){
+      myNc = avLine;
+    } else if(varName.equals(F("cnonce"))){
+      myCnonce = avLine;
+    }
+  } while(nextBreak > 0);
+
+  String ha1 = (passwordIsHash) ? String(password) : stringMD5(myUsername + ':' + myRealm + ':' + String(password));
+  String ha2 = String(method) + ':' + myUri;
+  String response = ha1 + ':' + myNonce + ':' + myNc + ':' + myCnonce + ':' + myQop + ':' + stringMD5(ha2);
+
+  if(myResponse.equals(stringMD5(response))){
+    //os_printf("AUTH SUCCESS\n");
+    return true;
+  }
+
+  //os_printf("AUTH FAIL: password\n");
+  return false;
+}

libraries/ESPAsyncWebServer/src/WebAuthentication.h

@@ -0,0 +1,34 @@
+/*
+  Asynchronous WebServer library for Espressif MCUs
+
+  Copyright (c) 2016 Hristo Gochkov. All rights reserved.
+  This file is part of the esp8266 core for Arduino environment.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#ifndef WEB_AUTHENTICATION_H_
+#define WEB_AUTHENTICATION_H_
+
+#include "Arduino.h"
+
+bool checkBasicAuthentication(const char * header, const char * username, const char * password);
+String requestDigestAuthentication(const char * realm);
+bool checkDigestAuthentication(const char * header, const __FlashStringHelper *method, const char * username, const char * password, const char * realm, bool passwordIsHash, const char * nonce, const char * opaque, const char * uri);
+
+//for storing hashed versions on the device that can be authenticated against
+String generateDigestHash(const char * username, const char * password, const char * realm);
+
+#endif

libraries/ESPAsyncWebServer/src/WebHandlerImpl.h

@@ -0,0 +1,151 @@
+/*
+  Asynchronous WebServer library for Espressif MCUs
+
+  Copyright (c) 2016 Hristo Gochkov. All rights reserved.
+  This file is part of the esp8266 core for Arduino environment.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+#ifndef ASYNCWEBSERVERHANDLERIMPL_H_
+#define ASYNCWEBSERVERHANDLERIMPL_H_
+
+#include <string>
+#ifdef ASYNCWEBSERVER_REGEX
+#include <regex>
+#endif
+
+#include "stddef.h"
+#include <time.h>
+
+class AsyncStaticWebHandler: public AsyncWebHandler {
+   using File = fs::File;
+   using FS = fs::FS;
+  private:
+    bool _getFile(AsyncWebServerRequest *request);
+    bool _fileExists(AsyncWebServerRequest *request, const String& path);
+    uint8_t _countBits(const uint8_t value) const;
+  protected:
+    FS _fs;
+    String _uri;
+    String _path;
+    String _default_file;
+    String _cache_control;
+    String _last_modified;
+    AwsTemplateProcessor _callback;
+    bool _isDir;
+    bool _gzipFirst;
+    uint8_t _gzipStats;
+  public:
+    AsyncStaticWebHandler(const char* uri, FS& fs, const char* path, const char* cache_control);
+    virtual bool canHandle(AsyncWebServerRequest *request) override final;
+    virtual void handleRequest(AsyncWebServerRequest *request) override final;
+    AsyncStaticWebHandler& setIsDir(bool isDir);
+    AsyncStaticWebHandler& setDefaultFile(const char* filename);
+    AsyncStaticWebHandler& setCacheControl(const char* cache_control);
+    AsyncStaticWebHandler& setLastModified(const char* last_modified);
+    AsyncStaticWebHandler& setLastModified(struct tm* last_modified);
+  #ifdef ESP8266
+    AsyncStaticWebHandler& setLastModified(time_t last_modified);
+    AsyncStaticWebHandler& setLastModified(); //sets to current time. Make sure sntp is runing and time is updated
+  #endif
+    AsyncStaticWebHandler& setTemplateProcessor(AwsTemplateProcessor newCallback) {_callback = newCallback; return *this;}
+};
+
+class AsyncCallbackWebHandler: public AsyncWebHandler {
+  private:
+  protected:
+    String _uri;
+    WebRequestMethodComposite _method;
+    ArRequestHandlerFunction _onRequest;
+    ArUploadHandlerFunction _onUpload;
+    ArBodyHandlerFunction _onBody;
+    bool _isRegex;
+  public:
+    AsyncCallbackWebHandler() : _uri(), _method(HTTP_ANY), _onRequest(NULL), _onUpload(NULL), _onBody(NULL), _isRegex(false) {}
+    void setUri(const String& uri){ 
+      _uri = uri; 
+      _isRegex = uri.startsWith("^") && uri.endsWith("$");
+    }
+    void setMethod(WebRequestMethodComposite method){ _method = method; }
+    void onRequest(ArRequestHandlerFunction fn){ _onRequest = fn; }
+    void onUpload(ArUploadHandlerFunction fn){ _onUpload = fn; }
+    void onBody(ArBodyHandlerFunction fn){ _onBody = fn; }
+
+    virtual bool canHandle(AsyncWebServerRequest *request) override final{
+
+      if(!_onRequest)
+        return false;
+
+      if(!(_method & request->method()))
+        return false;
+
+#ifdef ASYNCWEBSERVER_REGEX
+      if (_isRegex) {
+        std::regex pattern(_uri.c_str());
+        std::smatch matches;
+        std::string s(request->url().c_str());
+        if(std::regex_search(s, matches, pattern)) {
+          for (size_t i = 1; i < matches.size(); ++i) { // start from 1
+            request->_addPathParam(matches[i].str().c_str());
+          }
+        } else {
+          return false;
+        }
+      } else 
+#endif
+      if (_uri.length() && _uri.startsWith("/*.")) {
+         String uriTemplate = String (_uri);
+         uriTemplate = uriTemplate.substring(uriTemplate.lastIndexOf("."));
+         if (!request->url().endsWith(uriTemplate))
+           return false;
+      }
+      else
+      if (_uri.length() && _uri.endsWith("*")) {
+        String uriTemplate = String(_uri);
+	uriTemplate = uriTemplate.substring(0, uriTemplate.length() - 1);
+        if (!request->url().startsWith(uriTemplate))
+          return false;
+      }
+      else if(_uri.length() && (_uri != request->url() && !request->url().startsWith(_uri+"/")))
+        return false;
+
+      request->addInterestingHeader("ANY");
+      return true;
+    }
+  
+    virtual void handleRequest(AsyncWebServerRequest *request) override final {
+      if((_username != "" && _password != "") && !request->authenticate(_username.c_str(), _password.c_str()))
+        return request->requestAuthentication();
+      if(_onRequest)
+        _onRequest(request);
+      else
+        request->send(500);
+    }
+    virtual void handleUpload(AsyncWebServerRequest *request, const String& filename, size_t index, uint8_t *data, size_t len, bool final) override final {
+      if((_username != "" && _password != "") && !request->authenticate(_username.c_str(), _password.c_str()))
+        return request->requestAuthentication();
+      if(_onUpload)
+        _onUpload(request, filename, index, data, len, final);
+    }
+    virtual void handleBody(AsyncWebServerRequest *request, uint8_t *data, size_t len, size_t index, size_t total) override final {
+      if((_username != "" && _password != "") && !request->authenticate(_username.c_str(), _password.c_str()))
+        return request->requestAuthentication();
+      if(_onBody)
+        _onBody(request, data, len, index, total);
+    }
+    virtual bool isRequestHandlerTrivial() override final {return _onRequest ? false : true;}
+};
+
+#endif /* ASYNCWEBSERVERHANDLERIMPL_H_ */

libraries/ESPAsyncWebServer/src/WebHandlers.cpp

@@ -0,0 +1,233 @@
+/*
+  Asynchronous WebServer library for Espressif MCUs
+
+  Copyright (c) 2016 Hristo Gochkov. All rights reserved.
+  This file is part of the esp8266 core for Arduino environment.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+#include "ESPAsyncWebServer.h"
+#include "WebHandlerImpl.h"
+
+AsyncStaticWebHandler::AsyncStaticWebHandler(const char* uri, FS& fs, const char* path, const char* cache_control)
+  : _fs(fs), _uri(uri), _path(path), _default_file(F("index.htm")), _cache_control(cache_control), _last_modified(), _callback(nullptr)
+{
+  // Ensure leading '/'
+  if (_uri.length() == 0 || _uri[0] != '/') _uri = String('/') + _uri;
+  if (_path.length() == 0 || _path[0] != '/') _path = String('/') + _path;
+
+  // If path ends with '/' we assume a hint that this is a directory to improve performance.
+  // However - if it does not end with '/' we, can't assume a file, path can still be a directory.
+  _isDir = _path[_path.length()-1] == '/';
+
+  // Remove the trailing '/' so we can handle default file
+  // Notice that root will be "" not "/"
+  if (_uri[_uri.length()-1] == '/') _uri = _uri.substring(0, _uri.length()-1);
+  if (_path[_path.length()-1] == '/') _path = _path.substring(0, _path.length()-1);
+
+  // Reset stats
+  _gzipFirst = false;
+  _gzipStats = 0xF8;
+}
+
+AsyncStaticWebHandler& AsyncStaticWebHandler::setIsDir(bool isDir){
+  _isDir = isDir;
+  return *this;
+}
+
+AsyncStaticWebHandler& AsyncStaticWebHandler::setDefaultFile(const char* filename){
+  _default_file = String(filename);
+  return *this;
+}
+
+AsyncStaticWebHandler& AsyncStaticWebHandler::setCacheControl(const char* cache_control){
+  _cache_control = String(cache_control);
+  return *this;
+}
+
+AsyncStaticWebHandler& AsyncStaticWebHandler::setLastModified(const char* last_modified){
+  _last_modified = last_modified;
+  return *this;
+}
+
+AsyncStaticWebHandler& AsyncStaticWebHandler::setLastModified(struct tm* last_modified){
+  auto formatP = PSTR("%a, %d %b %Y %H:%M:%S %Z");
+  char format[strlen_P(formatP) + 1];
+  strcpy_P(format, formatP);
+
+  char result[30];
+  strftime(result, sizeof(result), format, last_modified);
+  return setLastModified((const char *)result);
+}
+
+#ifdef ESP8266
+AsyncStaticWebHandler& AsyncStaticWebHandler::setLastModified(time_t last_modified){
+  return setLastModified((struct tm *)gmtime(&last_modified));
+}
+
+AsyncStaticWebHandler& AsyncStaticWebHandler::setLastModified(){
+  time_t last_modified;
+  if(time(&last_modified) == 0) //time is not yet set
+    return *this;
+  return setLastModified(last_modified);
+}
+#endif
+bool AsyncStaticWebHandler::canHandle(AsyncWebServerRequest *request){
+  if(request->method() != HTTP_GET
+    || !request->url().startsWith(_uri)
+    || !request->isExpectedRequestedConnType(RCT_DEFAULT, RCT_HTTP)
+  ){
+    return false;
+  }
+  if (_getFile(request)) {
+    // We interested in "If-Modified-Since" header to check if file was modified
+    if (_last_modified.length())
+      request->addInterestingHeader(F("If-Modified-Since"));
+
+    if(_cache_control.length())
+      request->addInterestingHeader(F("If-None-Match"));
+
+    return true;
+  }
+
+  return false;
+}
+
+bool AsyncStaticWebHandler::_getFile(AsyncWebServerRequest *request)
+{
+  // Remove the found uri
+  String path = request->url().substring(_uri.length());
+
+  // We can skip the file check and look for default if request is to the root of a directory or that request path ends with '/'
+  bool canSkipFileCheck = (_isDir && path.length() == 0) || (path.length() && path[path.length()-1] == '/');
+
+  path = _path + path;
+
+  // Do we have a file or .gz file
+  if (!canSkipFileCheck && _fileExists(request, path))
+    return true;
+
+  // Can't handle if not default file
+  if (_default_file.length() == 0)
+    return false;
+
+  // Try to add default file, ensure there is a trailing '/' ot the path.
+  if (path.length() == 0 || path[path.length()-1] != '/')
+    path += String('/');
+  path += _default_file;
+
+  return _fileExists(request, path);
+}
+
+#ifdef ESP32
+#define FILE_IS_REAL(f) (f == true && !f.isDirectory())
+#else
+#define FILE_IS_REAL(f) (f == true)
+#endif
+
+bool AsyncStaticWebHandler::_fileExists(AsyncWebServerRequest *request, const String& path)
+{
+  bool fileFound = false;
+  bool gzipFound = false;
+
+  String gzip = path + F(".gz");
+
+  if (_gzipFirst) {
+    if (_fs.exists(gzip)) {                             
+     request->_tempFile = _fs.open(gzip, fs::FileOpenMode::read);
+     gzipFound = FILE_IS_REAL(request->_tempFile);
+    } 
+    if (!gzipFound){
+     if (_fs.exists(path)) {                              
+      request->_tempFile = _fs.open(path, fs::FileOpenMode::read);
+      fileFound = FILE_IS_REAL(request->_tempFile);
+     }  
+    }
+  } else {
+    if (_fs.exists(path)) {                           
+     request->_tempFile = _fs.open(path, fs::FileOpenMode::read);
+     fileFound = FILE_IS_REAL(request->_tempFile);
+    }
+    if (!fileFound){
+     if (_fs.exists(gzip)) {                             
+      request->_tempFile = _fs.open(gzip, fs::FileOpenMode::read);
+      gzipFound = FILE_IS_REAL(request->_tempFile);
+     }
+    }
+  }
+
+  bool found = fileFound || gzipFound;
+
+  if (found) {
+    // Extract the file name from the path and keep it in _tempObject
+    size_t pathLen = path.length();
+    char * _tempPath = (char*)malloc(pathLen+1);
+    snprintf_P(_tempPath, pathLen+1, PSTR("%s"), path.c_str());
+    request->_tempObject = (void*)_tempPath;
+
+    // Calculate gzip statistic
+    _gzipStats = (_gzipStats << 1) + (gzipFound ? 1 : 0);
+    if (_gzipStats == 0x00) _gzipFirst = false; // All files are not gzip
+    else if (_gzipStats == 0xFF) _gzipFirst = true; // All files are gzip
+    else _gzipFirst = _countBits(_gzipStats) > 4; // IF we have more gzip files - try gzip first
+  }
+
+  return found;
+}
+
+uint8_t AsyncStaticWebHandler::_countBits(const uint8_t value) const
+{
+  uint8_t w = value;
+  uint8_t n;
+  for (n=0; w!=0; n++) w&=w-1;
+  return n;
+}
+
+void AsyncStaticWebHandler::handleRequest(AsyncWebServerRequest *request)
+{
+  // Get the filename from request->_tempObject and free it
+  String filename = String((char*)request->_tempObject);
+  free(request->_tempObject);
+  request->_tempObject = NULL;
+  if((_username.length() && _password.length()) && !request->authenticate(_username.c_str(), _password.c_str()))
+      return request->requestAuthentication();
+
+  if (request->_tempFile == true) {
+    time_t lw = request->_tempFile.getLastWrite();    // get last file mod time (if supported by FS)
+    if (lw) setLastModified(gmtime(&lw));
+    String etag(lw ? lw : request->_tempFile.size());   // set etag to lastmod timestamp if available, otherwise to size
+    if (_last_modified.length() && _last_modified == request->header(F("If-Modified-Since"))) {
+      request->_tempFile.close();
+      request->send(304); // Not modified
+    } else if (_cache_control.length() && request->hasHeader(F("If-None-Match")) && request->header(F("If-None-Match")).equals(etag)) {
+      request->_tempFile.close();
+      AsyncWebServerResponse * response = new AsyncBasicResponse(304); // Not modified
+      response->addHeader(F("Cache-Control"), _cache_control);
+      response->addHeader(F("ETag"), etag);
+      request->send(response);
+    } else {
+      AsyncWebServerResponse * response = new AsyncFileResponse(request->_tempFile, filename, String(), false, _callback);
+      if (_last_modified.length())
+        response->addHeader(F("Last-Modified"), _last_modified);
+      if (_cache_control.length()){
+        response->addHeader(F("Cache-Control"), _cache_control);
+        response->addHeader(F("ETag"), etag);
+      }
+      request->send(response);
+    }
+  } else {
+    request->send(404);
+  }
+}

libraries/ESPAsyncWebServer/src/WebRequest.cpp

@@ -0,0 +1,993 @@
+/*
+  Asynchronous WebServer library for Espressif MCUs
+
+  Copyright (c) 2016 Hristo Gochkov. All rights reserved.
+  This file is part of the esp8266 core for Arduino environment.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+#include "ESPAsyncWebServer.h"
+#include "WebResponseImpl.h"
+#include "WebAuthentication.h"
+
+#ifndef ESP8266
+#define os_strlen strlen
+#endif
+
+#define __is_param_char(c) ((c) && ((c) != '{') && ((c) != '[') && ((c) != '&') && ((c) != '='))
+
+enum { PARSE_REQ_START, PARSE_REQ_HEADERS, PARSE_REQ_BODY, PARSE_REQ_END, PARSE_REQ_FAIL };
+
+AsyncWebServerRequest::AsyncWebServerRequest(AsyncWebServer* s, AsyncClient* c)
+  : _client(c)
+  , _server(s)
+  , _handler(NULL)
+  , _response(NULL)
+  , _temp()
+  , _parseState(0)
+  , _version(0)
+  , _method(HTTP_ANY)
+  , _url()
+  , _host()
+  , _contentType()
+  , _boundary()
+  , _authorization()
+  , _reqconntype(RCT_HTTP)
+  , _isDigest(false)
+  , _isMultipart(false)
+  , _isPlainPost(false)
+  , _expectingContinue(false)
+  , _contentLength(0)
+  , _parsedLength(0)
+  , _params(AlternativeLinkedList<AsyncWebParameter *>([](AsyncWebParameter *p){ delete p; }))
+  , _multiParseState(0)
+  , _boundaryPosition(0)
+  , _itemStartIndex(0)
+  , _itemSize(0)
+  , _itemName()
+  , _itemFilename()
+  , _itemType()
+  , _itemValue()
+  , _itemBuffer(0)
+  , _itemBufferIndex(0)
+  , _itemIsFile(false)
+  , _tempObject(NULL)
+{
+  c->onError([](void *r, AsyncClient* c, int8_t error){ (void)c; AsyncWebServerRequest *req = (AsyncWebServerRequest*)r; req->_onError(error); }, this);
+  c->onAck([](void *r, AsyncClient* c, size_t len, uint32_t time){ (void)c; AsyncWebServerRequest *req = (AsyncWebServerRequest*)r; req->_onAck(len, time); }, this);
+  c->onDisconnect([](void *r, AsyncClient* c){ AsyncWebServerRequest *req = (AsyncWebServerRequest*)r; req->_onDisconnect(); delete c; }, this);
+  c->onTimeout([](void *r, AsyncClient* c, uint32_t time){ (void)c; AsyncWebServerRequest *req = (AsyncWebServerRequest*)r; req->_onTimeout(time); }, this);
+  c->onData([](void *r, AsyncClient* c, void *buf, size_t len){ (void)c; AsyncWebServerRequest *req = (AsyncWebServerRequest*)r; req->_onData(buf, len); }, this);
+  c->onPoll([](void *r, AsyncClient* c){ (void)c; AsyncWebServerRequest *req = ( AsyncWebServerRequest*)r; req->_onPoll(); }, this);
+}
+
+AsyncWebServerRequest::~AsyncWebServerRequest(){
+  _headers.clear();
+
+  _params.free();
+  _pathParams.clear();
+
+  _interestingHeaders.clear();
+
+  if(_response != NULL){
+    delete _response;
+  }
+
+  if(_tempObject != NULL){
+    free(_tempObject);
+  }
+
+  if(_tempFile){
+    _tempFile.close();
+  }
+  
+  if(_itemBuffer){
+    free(_itemBuffer);
+  }
+  
+}
+
+void AsyncWebServerRequest::_onData(void *buf, size_t len){
+  size_t i = 0;
+  while (true) {
+
+  if(_parseState < PARSE_REQ_BODY){
+    // Find new line in buf
+    char *str = (char*)buf;
+    for (i = 0; i < len; i++) {
+      if (str[i] == '\n') {
+        break;
+      }
+    }
+    if (i == len) { // No new line, just add the buffer in _temp
+      char ch = str[len-1];
+      str[len-1] = 0;
+      _temp.reserve(_temp.length()+len);
+      _temp.concat(str);
+      _temp.concat(ch);
+    } else { // Found new line - extract it and parse
+      str[i] = 0; // Terminate the string at the end of the line.
+      _temp.concat(str);
+      _temp.trim();
+      _parseLine();
+      if (++i < len) {
+        // Still have more buffer to process
+        buf = str+i;
+        len-= i;
+        continue;
+      }
+    }
+  } else if(_parseState == PARSE_REQ_BODY){
+    // A handler should be already attached at this point in _parseLine function.
+    // If handler does nothing (_onRequest is NULL), we don't need to really parse the body.
+    const bool needParse = _handler && !_handler->isRequestHandlerTrivial();
+    if(_isMultipart){
+      if(needParse){
+        size_t i;
+        for(i=0; i<len; i++){
+          _parseMultipartPostByte(((uint8_t*)buf)[i], i == len - 1);
+          _parsedLength++;
+        }
+      } else
+          _parsedLength += len;
+    } else {
+      if(_parsedLength == 0){
+        if(_contentType.startsWith(F("application/x-www-form-urlencoded"))){
+          _isPlainPost = true;
+        } else if(_contentType == F("text/plain") && __is_param_char(((char*)buf)[0])){
+          size_t i = 0;
+          while (i<len && __is_param_char(((char*)buf)[i++]));
+          if(i < len && ((char*)buf)[i-1] == '='){
+            _isPlainPost = true;
+          }
+        }
+      }
+      if(!_isPlainPost) {
+        //check if authenticated before calling the body
+        if(_handler) _handler->handleBody(this, (uint8_t*)buf, len, _parsedLength, _contentLength);
+        _parsedLength += len;
+      } else if(needParse) {
+        size_t i;
+        for(i=0; i<len; i++){
+          _parsedLength++;
+          _parsePlainPostChar(((uint8_t*)buf)[i]);
+        }
+      } else {
+        _parsedLength += len;
+      }
+    }
+    if(_parsedLength == _contentLength){
+      _parseState = PARSE_REQ_END;
+      //check if authenticated before calling handleRequest and request auth instead
+      if(_handler) _handler->handleRequest(this);
+      else send(501);
+    }
+  }
+  break;
+  }
+}
+
+void AsyncWebServerRequest::_removeNotInterestingHeaders(){
+  if (std::any_of(std::begin(_interestingHeaders), std::end(_interestingHeaders),
+      [](const String &str){ return str.equalsIgnoreCase(F("ANY")); }))
+      return; // nothing to do
+
+  for(auto iter = std::begin(_headers); iter != std::end(_headers); )
+  {
+      const auto name = iter->name();
+
+      if (std::none_of(std::begin(_interestingHeaders), std::end(_interestingHeaders),
+                       [&name](const String &str){ return str.equalsIgnoreCase(name); }))
+          iter = _headers.erase(iter);
+      else
+          iter++;
+  }
+}
+
+void AsyncWebServerRequest::_onPoll(){
+  //os_printf("p\n");
+  if(_response != NULL && _client != NULL && _client->canSend()){
+    if(!_response->_finished()){
+      _response->_ack(this, 0, 0);
+    } else {
+      AsyncWebServerResponse* r = _response;
+      _response = NULL;
+      delete r;
+
+      _client->close();
+    }
+  }
+}
+
+void AsyncWebServerRequest::_onAck(size_t len, uint32_t time){
+  //os_printf("a:%u:%u\n", len, time);
+  if(_response != NULL){
+    if(!_response->_finished()){
+      _response->_ack(this, len, time);
+    } else if(_response->_finished()){
+      AsyncWebServerResponse* r = _response;
+      _response = NULL;
+      delete r;
+
+      _client->close();
+    }
+  }
+}
+
+void AsyncWebServerRequest::_onError(int8_t error){
+  (void)error;
+}
+
+void AsyncWebServerRequest::_onTimeout(uint32_t time){
+  (void)time;
+  //os_printf("TIMEOUT: %u, state: %s\n", time, _client->stateToString());
+  _client->close();
+}
+
+void AsyncWebServerRequest::onDisconnect (ArDisconnectHandler fn){
+    _onDisconnectfn=fn;
+}
+
+void AsyncWebServerRequest::_onDisconnect(){
+  //os_printf("d\n");
+  if(_onDisconnectfn) {
+      _onDisconnectfn();
+    }
+  _server->_handleDisconnect(this);
+}
+
+void AsyncWebServerRequest::_addParam(AsyncWebParameter *p){
+  _params.add(p);
+}
+
+void AsyncWebServerRequest::_addPathParam(const char *p){
+  _pathParams.emplace_back(p);
+}
+
+void AsyncWebServerRequest::_addGetParams(const String& params){
+  size_t start = 0;
+  while (start < params.length()){
+    int end = params.indexOf('&', start);
+    if (end < 0) end = params.length();
+    int equal = params.indexOf('=', start);
+    if (equal < 0 || equal > end) equal = end;
+    String name = params.substring(start, equal);
+    String value = equal + 1 < end ? params.substring(equal + 1, end) : String();
+    _addParam(new AsyncWebParameter(urlDecode(name), urlDecode(value)));
+    start = end + 1;
+  }
+}
+
+bool AsyncWebServerRequest::_parseReqHead(){
+  // Split the head into method, url and version
+  int index = _temp.indexOf(' ');
+  String m = _temp.substring(0, index);
+  index = _temp.indexOf(' ', index+1);
+  String u = _temp.substring(m.length()+1, index);
+  _temp = _temp.substring(index+1);
+
+  if(m == F("GET")){
+    _method = HTTP_GET;
+  } else if(m == F("POST")){
+    _method = HTTP_POST;
+  } else if(m == F("DELETE")){
+    _method = HTTP_DELETE;
+  } else if(m == F("PUT")){
+    _method = HTTP_PUT;
+  } else if(m == F("PATCH")){
+    _method = HTTP_PATCH;
+  } else if(m == F("HEAD")){
+    _method = HTTP_HEAD;
+  } else if(m == F("OPTIONS")){
+    _method = HTTP_OPTIONS;
+  }
+
+  String g;
+  index = u.indexOf('?');
+  if(index > 0){
+    g = u.substring(index +1);
+    u = u.substring(0, index);
+  }
+  _url = urlDecode(u);
+  _addGetParams(g);
+
+  if(!_temp.startsWith(F("HTTP/1.0")))
+    _version = 1;
+
+  _temp = String();
+  return true;
+}
+
+bool strContains(const String &src, const String &find, bool mindcase = true) {
+  int pos=0, i=0;
+  const int slen = src.length();
+  const int flen = find.length();
+
+  if (slen < flen) return false;
+  while (pos <= (slen - flen)) {
+    for (i=0; i < flen; i++) {
+      if (mindcase) {
+        if (src[pos+i] != find[i]) i = flen + 1; // no match
+      }
+      else if (tolower(src[pos+i]) != tolower(find[i])) {
+        i = flen + 1; // no match
+      }
+    }
+    if (i == flen) return true;
+    pos++;
+  }
+  return false;
+}
+
+bool AsyncWebServerRequest::_parseReqHeader(){
+  int index = _temp.indexOf(':');
+  if(index){
+    String name = _temp.substring(0, index);
+    String value = _temp.substring(index + 2);
+    if(name.equalsIgnoreCase("Host")){
+      _host = value;
+    } else if(name.equalsIgnoreCase(F("Content-Type"))){
+	    _contentType = value.substring(0, value.indexOf(';'));
+      if (value.startsWith(F("multipart/"))){
+        _boundary = value.substring(value.indexOf('=')+1);
+        _boundary.replace(String('"'), String());
+        _isMultipart = true;
+      }
+    } else if(name.equalsIgnoreCase(F("Content-Length"))){
+      _contentLength = atoi(value.c_str());
+    } else if(name.equalsIgnoreCase(F("Expect")) && value == F("100-continue")){
+      _expectingContinue = true;
+    } else if(name.equalsIgnoreCase(F("Authorization"))){
+      if(value.length() > 5 && value.substring(0,5).equalsIgnoreCase(F("Basic"))){
+        _authorization = value.substring(6);
+      } else if(value.length() > 6 && value.substring(0,6).equalsIgnoreCase(F("Digest"))){
+        _isDigest = true;
+        _authorization = value.substring(7);
+      }
+    } else {
+      if(name.equalsIgnoreCase(F("Upgrade")) && value.equalsIgnoreCase(F("websocket"))){
+        // WebSocket request can be uniquely identified by header: [Upgrade: websocket]
+        _reqconntype = RCT_WS;
+      } else {
+        if(name.equalsIgnoreCase(F("Accept")) && strContains(value, F("text/event-stream"), false)){
+          // WebEvent request can be uniquely identified by header:  [Accept: text/event-stream]
+          _reqconntype = RCT_EVENT;
+        }
+      }
+    }
+    _headers.emplace_back(name, value);
+  }
+  _temp = String();
+  return true;
+}
+
+void AsyncWebServerRequest::_parsePlainPostChar(uint8_t data){
+  if(data && (char)data != '&')
+    _temp += (char)data;
+  if(!data || (char)data == '&' || _parsedLength == _contentLength){
+    String name = F("body");
+    String value = _temp;
+    if(!_temp.startsWith(String('{')) && !_temp.startsWith(String('[')) && _temp.indexOf('=') > 0){
+      name = _temp.substring(0, _temp.indexOf('='));
+      value = _temp.substring(_temp.indexOf('=') + 1);
+    }
+    _addParam(new AsyncWebParameter(urlDecode(name), urlDecode(value), true));
+    _temp = String();
+  }
+}
+
+void AsyncWebServerRequest::_handleUploadByte(uint8_t data, bool last){
+  _itemBuffer[_itemBufferIndex++] = data;
+
+  if(last || _itemBufferIndex == 1460){
+    //check if authenticated before calling the upload
+    if(_handler)
+      _handler->handleUpload(this, _itemFilename, _itemSize - _itemBufferIndex, _itemBuffer, _itemBufferIndex, false);
+    _itemBufferIndex = 0;
+  }
+}
+
+enum {
+  EXPECT_BOUNDARY,
+  PARSE_HEADERS,
+  WAIT_FOR_RETURN1,
+  EXPECT_FEED1,
+  EXPECT_DASH1,
+  EXPECT_DASH2,
+  BOUNDARY_OR_DATA,
+  DASH3_OR_RETURN2,
+  EXPECT_FEED2,
+  PARSING_FINISHED,
+  PARSE_ERROR
+};
+
+void AsyncWebServerRequest::_parseMultipartPostByte(uint8_t data, bool last){
+#define itemWriteByte(b) do { _itemSize++; if(_itemIsFile) _handleUploadByte(b, last); else _itemValue+=(char)(b); } while(0)
+
+  if(!_parsedLength){
+    _multiParseState = EXPECT_BOUNDARY;
+    _temp = String();
+    _itemName = String();
+    _itemFilename = String();
+    _itemType = String();
+  }
+
+  if(_multiParseState == WAIT_FOR_RETURN1){
+    if(data != '\r'){
+      itemWriteByte(data);
+    } else {
+      _multiParseState = EXPECT_FEED1;
+    }
+  } else if(_multiParseState == EXPECT_BOUNDARY){
+    if(_parsedLength < 2 && data != '-'){
+      _multiParseState = PARSE_ERROR;
+      return;
+    } else if(_parsedLength - 2 < _boundary.length() && _boundary.c_str()[_parsedLength - 2] != data){
+      _multiParseState = PARSE_ERROR;
+      return;
+    } else if(_parsedLength - 2 == _boundary.length() && data != '\r'){
+      _multiParseState = PARSE_ERROR;
+      return;
+    } else if(_parsedLength - 3 == _boundary.length()){
+      if(data != '\n'){
+        _multiParseState = PARSE_ERROR;
+        return;
+      }
+      _multiParseState = PARSE_HEADERS;
+      _itemIsFile = false;
+    }
+  } else if(_multiParseState == PARSE_HEADERS){
+    if((char)data != '\r' && (char)data != '\n')
+       _temp += (char)data;
+    if((char)data == '\n'){
+      if(_temp.length()){
+        if(_temp.length() > 12 && _temp.substring(0, 12).equalsIgnoreCase(F("Content-Type"))){
+          _itemType = _temp.substring(14);
+          _itemIsFile = true;
+        } else if(_temp.length() > 19 && _temp.substring(0, 19).equalsIgnoreCase(F("Content-Disposition"))){
+          _temp = _temp.substring(_temp.indexOf(';') + 2);
+          while(_temp.indexOf(';') > 0){
+            String name = _temp.substring(0, _temp.indexOf('='));
+            String nameVal = _temp.substring(_temp.indexOf('=') + 2, _temp.indexOf(';') - 1);
+            if(name == F("name")){
+              _itemName = nameVal;
+            } else if(name == F("filename")){
+              _itemFilename = nameVal;
+              _itemIsFile = true;
+            }
+            _temp = _temp.substring(_temp.indexOf(';') + 2);
+          }
+          String name = _temp.substring(0, _temp.indexOf('='));
+          String nameVal = _temp.substring(_temp.indexOf('=') + 2, _temp.length() - 1);
+          if(name == F("name")){
+            _itemName = nameVal;
+          } else if(name == F("filename")){
+            _itemFilename = nameVal;
+            _itemIsFile = true;
+          }
+        }
+        _temp = String();
+      } else {
+        _multiParseState = WAIT_FOR_RETURN1;
+        //value starts from here
+        _itemSize = 0;
+        _itemStartIndex = _parsedLength;
+        _itemValue = String();
+        if(_itemIsFile){
+          if(_itemBuffer)
+            free(_itemBuffer);
+          _itemBuffer = (uint8_t*)malloc(1460);
+          if(_itemBuffer == NULL){
+            _multiParseState = PARSE_ERROR;
+            return;
+          }
+          _itemBufferIndex = 0;
+        }
+      }
+    }
+  } else if(_multiParseState == EXPECT_FEED1){
+    if(data != '\n'){
+      _multiParseState = WAIT_FOR_RETURN1;
+      itemWriteByte('\r'); _parseMultipartPostByte(data, last);
+    } else {
+      _multiParseState = EXPECT_DASH1;
+    }
+  } else if(_multiParseState == EXPECT_DASH1){
+    if(data != '-'){
+      _multiParseState = WAIT_FOR_RETURN1;
+      itemWriteByte('\r'); itemWriteByte('\n');  _parseMultipartPostByte(data, last);
+    } else {
+      _multiParseState = EXPECT_DASH2;
+    }
+  } else if(_multiParseState == EXPECT_DASH2){
+    if(data != '-'){
+      _multiParseState = WAIT_FOR_RETURN1;
+      itemWriteByte('\r'); itemWriteByte('\n'); itemWriteByte('-');  _parseMultipartPostByte(data, last);
+    } else {
+      _multiParseState = BOUNDARY_OR_DATA;
+      _boundaryPosition = 0;
+    }
+  } else if(_multiParseState == BOUNDARY_OR_DATA){
+    if(_boundaryPosition < _boundary.length() && _boundary.c_str()[_boundaryPosition] != data){
+      _multiParseState = WAIT_FOR_RETURN1;
+      itemWriteByte('\r'); itemWriteByte('\n'); itemWriteByte('-');  itemWriteByte('-');
+      uint8_t i;
+      for(i=0; i<_boundaryPosition; i++)
+        itemWriteByte(_boundary.c_str()[i]);
+      _parseMultipartPostByte(data, last);
+    } else if(_boundaryPosition == _boundary.length() - 1){
+      _multiParseState = DASH3_OR_RETURN2;
+      if(!_itemIsFile){
+        _addParam(new AsyncWebParameter(_itemName, _itemValue, true));
+      } else {
+        if(_itemSize){
+          //check if authenticated before calling the upload
+          if(_handler) _handler->handleUpload(this, _itemFilename, _itemSize - _itemBufferIndex, _itemBuffer, _itemBufferIndex, true);
+          _itemBufferIndex = 0;
+          _addParam(new AsyncWebParameter(_itemName, _itemFilename, true, true, _itemSize));
+        }
+        free(_itemBuffer);
+        _itemBuffer = NULL;
+      }
+
+    } else {
+      _boundaryPosition++;
+    }
+  } else if(_multiParseState == DASH3_OR_RETURN2){
+    if(data == '-' && (_contentLength - _parsedLength - 4) != 0){
+      //os_printf("ERROR: The parser got to the end of the POST but is expecting %u bytes more!\nDrop an issue so we can have more info on the matter!\n", _contentLength - _parsedLength - 4);
+      _contentLength = _parsedLength + 4;//lets close the request gracefully
+    }
+    if(data == '\r'){
+      _multiParseState = EXPECT_FEED2;
+    } else if(data == '-' && _contentLength == (_parsedLength + 4)){
+      _multiParseState = PARSING_FINISHED;
+    } else {
+      _multiParseState = WAIT_FOR_RETURN1;
+      itemWriteByte('\r'); itemWriteByte('\n'); itemWriteByte('-');  itemWriteByte('-');
+      uint8_t i; for(i=0; i<_boundary.length(); i++) itemWriteByte(_boundary.c_str()[i]);
+      _parseMultipartPostByte(data, last);
+    }
+  } else if(_multiParseState == EXPECT_FEED2){
+    if(data == '\n'){
+      _multiParseState = PARSE_HEADERS;
+      _itemIsFile = false;
+    } else {
+      _multiParseState = WAIT_FOR_RETURN1;
+      itemWriteByte('\r'); itemWriteByte('\n'); itemWriteByte('-');  itemWriteByte('-');
+      uint8_t i; for(i=0; i<_boundary.length(); i++) itemWriteByte(_boundary.c_str()[i]);
+      itemWriteByte('\r'); _parseMultipartPostByte(data, last);
+    }
+  }
+}
+
+void AsyncWebServerRequest::_parseLine(){
+  if(_parseState == PARSE_REQ_START){
+    if(!_temp.length()){
+      _parseState = PARSE_REQ_FAIL;
+      _client->close();
+    } else {
+      _parseReqHead();
+      _parseState = PARSE_REQ_HEADERS;
+    }
+    return;
+  }
+
+  if(_parseState == PARSE_REQ_HEADERS){
+    if(!_temp.length()){
+      //end of headers
+      _server->_rewriteRequest(this);
+      _server->_attachHandler(this);
+      _removeNotInterestingHeaders();
+      if(_expectingContinue){
+        String response = F("HTTP/1.1 100 Continue\r\n\r\n");
+        _client->write(response.c_str(), response.length());
+      }
+      //check handler for authentication
+      if(_contentLength){
+        _parseState = PARSE_REQ_BODY;
+      } else {
+        _parseState = PARSE_REQ_END;
+        if(_handler) _handler->handleRequest(this);
+        else send(501);
+      }
+    } else _parseReqHeader();
+  }
+}
+
+size_t AsyncWebServerRequest::headers() const{
+  return _headers.size();
+}
+
+bool AsyncWebServerRequest::hasHeader(const String& name) const {
+  for(const auto& h: _headers){
+    if(h.name().equalsIgnoreCase(name)){
+      return true;
+    }
+  }
+  return false;
+}
+
+bool AsyncWebServerRequest::hasHeader(const __FlashStringHelper * data) const {
+  return hasHeader(String(data));
+}
+
+AsyncWebHeader* AsyncWebServerRequest::getHeader(const String& name) {
+  auto iter = std::find_if(std::begin(_headers), std::end(_headers),
+                           [&name](const AsyncWebHeader &header){ return header.name().equalsIgnoreCase(name); });
+
+  if (iter == std::end(_headers))
+        return nullptr;
+
+  return &(*iter);
+}
+
+const AsyncWebHeader* AsyncWebServerRequest::getHeader(const String& name) const {
+  auto iter = std::find_if(std::begin(_headers), std::end(_headers),
+                           [&name](const AsyncWebHeader &header){ return header.name().equalsIgnoreCase(name); });
+
+  if (iter == std::end(_headers))
+        return nullptr;
+
+  return &(*iter);
+}
+
+AsyncWebHeader* AsyncWebServerRequest::getHeader(const __FlashStringHelper * data) {
+  PGM_P p = reinterpret_cast<PGM_P>(data);
+  size_t n = strlen_P(p);
+  char * name = (char*) malloc(n+1);
+  if (name) {
+    strcpy_P(name, p);
+    AsyncWebHeader* result = getHeader( String(name));
+    free(name);
+    return result;
+  } else {
+    return nullptr;
+  }
+}
+
+const AsyncWebHeader* AsyncWebServerRequest::getHeader(const __FlashStringHelper * data) const {
+  PGM_P p = reinterpret_cast<PGM_P>(data);
+  size_t n = strlen_P(p);
+  char * name = (char*) malloc(n+1);
+  if (name) {
+    strcpy_P(name, p);
+    const AsyncWebHeader* result = getHeader( String(name));
+    free(name);
+    return result;
+  } else {
+    return nullptr;
+  }
+}
+
+AsyncWebHeader* AsyncWebServerRequest::getHeader(size_t num) {
+  if (num >= _headers.size())
+      return nullptr;
+  return &(*std::next(std::begin(_headers), num));
+}
+
+const AsyncWebHeader* AsyncWebServerRequest::getHeader(size_t num) const {
+  if (num >= _headers.size())
+      return nullptr;
+  return &(*std::next(std::begin(_headers), num));
+}
+
+size_t AsyncWebServerRequest::params() const {
+  return _params.length();
+}
+
+bool AsyncWebServerRequest::hasParam(const String& name, bool post, bool file) const {
+  for(const auto& p: _params){
+    if(p->name() == name && p->isPost() == post && p->isFile() == file){
+      return true;
+    }
+  }
+  return false;
+}
+
+bool AsyncWebServerRequest::hasParam(const __FlashStringHelper * data, bool post, bool file) const {
+  return hasParam(String(data).c_str(), post, file);
+}
+
+AsyncWebParameter* AsyncWebServerRequest::getParam(const String& name, bool post, bool file) const {
+  for(const auto& p: _params){
+    if(p->name() == name && p->isPost() == post && p->isFile() == file){
+      return p;
+    }
+  }
+  return nullptr;
+}
+
+AsyncWebParameter* AsyncWebServerRequest::getParam(const __FlashStringHelper * data, bool post, bool file) const {
+  return getParam(String(data).c_str(), post, file);
+}
+
+AsyncWebParameter* AsyncWebServerRequest::getParam(size_t num) const {
+  auto param = _params.nth(num);
+  return param ? *param : nullptr;
+}
+
+void AsyncWebServerRequest::addInterestingHeader(const String& name){
+  if(std::none_of(std::begin(_interestingHeaders), std::end(_interestingHeaders),
+                  [&name](const String &str){ return str.equalsIgnoreCase(name); }))
+    _interestingHeaders.push_back(name);
+}
+
+void AsyncWebServerRequest::send(AsyncWebServerResponse *response){
+  _response = response;
+  if(_response == NULL){
+    _client->close(true);
+    _onDisconnect();
+    return;
+  }
+  if(!_response->_sourceValid()){
+    delete response;
+    _response = NULL;
+    send(500);
+  }
+  else {
+    _client->setRxTimeout(0);
+    _response->_respond(this);
+  }
+}
+
+AsyncWebServerResponse * AsyncWebServerRequest::beginResponse(int code, const String& contentType, const String& content){
+  return new AsyncBasicResponse(code, contentType, content);
+}
+
+AsyncWebServerResponse * AsyncWebServerRequest::beginResponse(FS &fs, const String& path, const String& contentType, bool download, AwsTemplateProcessor callback){
+  if(fs.exists(path) || (!download && fs.exists(path+F(".gz"))))
+    return new AsyncFileResponse(fs, path, contentType, download, callback);
+  return NULL;
+}
+
+AsyncWebServerResponse * AsyncWebServerRequest::beginResponse(File content, const String& path, const String& contentType, bool download, AwsTemplateProcessor callback){
+  if(content == true)
+    return new AsyncFileResponse(content, path, contentType, download, callback);
+  return NULL;
+}
+
+AsyncWebServerResponse * AsyncWebServerRequest::beginResponse(Stream &stream, const String& contentType, size_t len, AwsTemplateProcessor callback){
+  return new AsyncStreamResponse(stream, contentType, len, callback);
+}
+
+AsyncWebServerResponse * AsyncWebServerRequest::beginResponse(const String& contentType, size_t len, AwsResponseFiller callback, AwsTemplateProcessor templateCallback){
+  return new AsyncCallbackResponse(contentType, len, callback, templateCallback);
+}
+
+AsyncWebServerResponse * AsyncWebServerRequest::beginChunkedResponse(const String& contentType, AwsResponseFiller callback, AwsTemplateProcessor templateCallback){
+  if(_version)
+    return new AsyncChunkedResponse(contentType, callback, templateCallback);
+  return new AsyncCallbackResponse(contentType, 0, callback, templateCallback);
+}
+
+AsyncResponseStream * AsyncWebServerRequest::beginResponseStream(const String& contentType, size_t bufferSize){
+  return new AsyncResponseStream(contentType, bufferSize);
+}
+
+AsyncWebServerResponse * AsyncWebServerRequest::beginResponse_P(int code, const String& contentType, const uint8_t * content, size_t len, AwsTemplateProcessor callback){
+  return new AsyncProgmemResponse(code, contentType, content, len, callback);
+}
+
+AsyncWebServerResponse * AsyncWebServerRequest::beginResponse_P(int code, const String& contentType, PGM_P content, AwsTemplateProcessor callback){
+  return beginResponse_P(code, contentType, (const uint8_t *)content, strlen_P(content), callback);
+}
+
+void AsyncWebServerRequest::send(int code, const String& contentType, const String& content){
+  send(beginResponse(code, contentType, content));
+}
+
+void AsyncWebServerRequest::send(FS &fs, const String& path, const String& contentType, bool download, AwsTemplateProcessor callback){
+  if(fs.exists(path) || (!download && fs.exists(path+F(".gz")))){
+    send(beginResponse(fs, path, contentType, download, callback));
+  } else send(404);
+}
+
+void AsyncWebServerRequest::send(File content, const String& path, const String& contentType, bool download, AwsTemplateProcessor callback){
+  if(content == true){
+    send(beginResponse(content, path, contentType, download, callback));
+  } else send(404);
+}
+
+void AsyncWebServerRequest::send(Stream &stream, const String& contentType, size_t len, AwsTemplateProcessor callback){
+  send(beginResponse(stream, contentType, len, callback));
+}
+
+void AsyncWebServerRequest::send(const String& contentType, size_t len, AwsResponseFiller callback, AwsTemplateProcessor templateCallback){
+  send(beginResponse(contentType, len, callback, templateCallback));
+}
+
+void AsyncWebServerRequest::sendChunked(const String& contentType, AwsResponseFiller callback, AwsTemplateProcessor templateCallback){
+  send(beginChunkedResponse(contentType, callback, templateCallback));
+}
+
+void AsyncWebServerRequest::send_P(int code, const String& contentType, const uint8_t * content, size_t len, AwsTemplateProcessor callback){
+  send(beginResponse_P(code, contentType, content, len, callback));
+}
+
+void AsyncWebServerRequest::send_P(int code, const String& contentType, PGM_P content, AwsTemplateProcessor callback){
+  send(beginResponse_P(code, contentType, content, callback));
+}
+
+void AsyncWebServerRequest::redirect(const String& url){
+  AsyncWebServerResponse * response = beginResponse(302);
+  response->addHeader(F("Location"), url);
+  send(response);
+}
+
+bool AsyncWebServerRequest::authenticate(const char * username, const char * password, const char * realm, bool passwordIsHash){
+  if(_authorization.length()){
+    if(_isDigest)
+      return checkDigestAuthentication(_authorization.c_str(), methodToString(), username, password, realm, passwordIsHash, NULL, NULL, NULL);
+    else if(!passwordIsHash)
+      return checkBasicAuthentication(_authorization.c_str(), username, password);
+    else
+      return _authorization.equals(password);
+  }
+  return false;
+}
+
+bool AsyncWebServerRequest::authenticate(const char * hash){
+  if(!_authorization.length() || hash == NULL)
+    return false;
+
+  if(_isDigest){
+    String hStr = String(hash);
+    int separator = hStr.indexOf(':');
+    if(separator <= 0)
+      return false;
+    String username = hStr.substring(0, separator);
+    hStr = hStr.substring(separator + 1);
+    separator = hStr.indexOf(':');
+    if(separator <= 0)
+      return false;
+    String realm = hStr.substring(0, separator);
+    hStr = hStr.substring(separator + 1);
+    return checkDigestAuthentication(_authorization.c_str(), methodToString(), username.c_str(), hStr.c_str(), realm.c_str(), true, NULL, NULL, NULL);
+  }
+
+  return (_authorization.equals(hash));
+}
+
+void AsyncWebServerRequest::requestAuthentication(const char * realm, bool isDigest){
+  AsyncWebServerResponse * r = beginResponse(401);
+  if(!isDigest && realm == NULL){
+    r->addHeader(F("WWW-Authenticate"), F("Basic realm=\"Login Required\""));
+  } else if(!isDigest){
+    String header = F("Basic realm=\"");
+    header.concat(realm);
+    header += '"';
+    r->addHeader(F("WWW-Authenticate"), header);
+  } else {
+    String header = F("Digest ");
+    header.concat(requestDigestAuthentication(realm));
+    r->addHeader(F("WWW-Authenticate"), header);
+  }
+  send(r);
+}
+
+bool AsyncWebServerRequest::hasArg(const char* name) const {
+  for(const auto& arg: _params){
+    if(arg->name() == name){
+      return true;
+    }
+  }
+  return false;
+}
+
+bool AsyncWebServerRequest::hasArg(const __FlashStringHelper * data) const {
+  return hasArg(String(data).c_str());
+}
+
+
+const String& AsyncWebServerRequest::arg(const String& name) const {
+  for(const auto& arg: _params){
+    if(arg->name() == name){
+      return arg->value();
+    }
+  }
+  return emptyString;
+}
+
+const String& AsyncWebServerRequest::arg(const __FlashStringHelper * data) const {
+  return arg(String(data).c_str());
+}
+
+const String& AsyncWebServerRequest::arg(size_t i) const {
+  return getParam(i)->value();
+}
+
+const String& AsyncWebServerRequest::argName(size_t i) const {
+  return getParam(i)->name();
+}
+
+const String& AsyncWebServerRequest::pathArg(size_t i) const {
+  return i < _pathParams.size() ? _pathParams[i] : emptyString;
+}
+
+const String& AsyncWebServerRequest::header(const char* name) const {
+  const AsyncWebHeader* h = getHeader(String(name));
+  return h ? h->value() : emptyString;
+}
+
+const String& AsyncWebServerRequest::header(const __FlashStringHelper * data) const {
+  return header(String(data).c_str());
+};
+
+
+const String& AsyncWebServerRequest::header(size_t i) const {
+  const AsyncWebHeader* h = getHeader(i);
+  return h ?  h->value() : emptyString;
+}
+
+const String& AsyncWebServerRequest::headerName(size_t i) const {
+  const AsyncWebHeader* h = getHeader(i);
+  return h ? h->name() : emptyString;
+}
+
+String AsyncWebServerRequest::urlDecode(const String& text) const {
+  char temp[] = "0x00";
+  unsigned int len = text.length();
+  unsigned int i = 0;
+  String decoded = String();
+  decoded.reserve(len); // Allocate the string internal buffer - never longer from source text
+  while (i < len){
+    char decodedChar;
+    char encodedChar = text.charAt(i++);
+    if ((encodedChar == '%') && (i + 1 < len)){
+      temp[2] = text.charAt(i++);
+      temp[3] = text.charAt(i++);
+      decodedChar = strtol(temp, NULL, 16);
+    } else if (encodedChar == '+') {
+      decodedChar = ' ';
+    } else {
+      decodedChar = encodedChar;  // normal ascii char
+    }
+    decoded.concat(decodedChar);
+  }
+  return decoded;
+}
+
+
+const __FlashStringHelper *AsyncWebServerRequest::methodToString() const {
+  if(_method == HTTP_ANY) return F("ANY");
+  else if(_method & HTTP_GET) return F("GET");
+  else if(_method & HTTP_POST) return F("POST");
+  else if(_method & HTTP_DELETE) return F("DELETE");
+  else if(_method & HTTP_PUT) return F("PUT");
+  else if(_method & HTTP_PATCH) return F("PATCH");
+  else if(_method & HTTP_HEAD) return F("HEAD");
+  else if(_method & HTTP_OPTIONS) return F("OPTIONS");
+  return F("UNKNOWN");
+}
+
+const __FlashStringHelper *AsyncWebServerRequest::requestedConnTypeToString() const {
+  switch (_reqconntype) {
+    case RCT_NOT_USED: return F("RCT_NOT_USED");
+    case RCT_DEFAULT:  return F("RCT_DEFAULT");
+    case RCT_HTTP:     return F("RCT_HTTP");
+    case RCT_WS:       return F("RCT_WS");
+    case RCT_EVENT:    return F("RCT_EVENT");
+    default:           return F("ERROR");
+  }
+}
+
+bool AsyncWebServerRequest::isExpectedRequestedConnType(RequestedConnectionType erct1, RequestedConnectionType erct2, RequestedConnectionType erct3) {
+    bool res = false;
+    if ((erct1 != RCT_NOT_USED) && (erct1 == _reqconntype)) res = true;
+    if ((erct2 != RCT_NOT_USED) && (erct2 == _reqconntype)) res = true;
+    if ((erct3 != RCT_NOT_USED) && (erct3 == _reqconntype)) res = true;
+    return res;
+}

libraries/ESPAsyncWebServer/src/WebResponseImpl.h

@@ -0,0 +1,138 @@
+/*
+  Asynchronous WebServer library for Espressif MCUs
+
+  Copyright (c) 2016 Hristo Gochkov. All rights reserved.
+  This file is part of the esp8266 core for Arduino environment.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+#ifndef ASYNCWEBSERVERRESPONSEIMPL_H_
+#define ASYNCWEBSERVERRESPONSEIMPL_H_
+
+#ifdef Arduino_h
+// arduino is not compatible with std::vector
+#undef min
+#undef max
+#endif
+#include <vector>
+#include <memory>
+
+// It is possible to restore these defines, but one can use _min and _max instead. Or std::min, std::max.
+
+class AsyncBasicResponse: public AsyncWebServerResponse {
+  private:
+    String _content;
+  public:
+    AsyncBasicResponse(int code, const String& contentType=String(), const String& content=String());
+    void _respond(AsyncWebServerRequest *request);
+    size_t _ack(AsyncWebServerRequest *request, size_t len, uint32_t time);
+    bool _sourceValid() const { return true; }
+};
+
+class AsyncAbstractResponse: public AsyncWebServerResponse {
+  private:
+    String _head;
+    // Data is inserted into cache at begin(). 
+    // This is inefficient with vector, but if we use some other container, 
+    // we won't be able to access it as contiguous array of bytes when reading from it,
+    // so by gaining performance in one place, we'll lose it in another.
+    std::vector<uint8_t> _cache;
+    size_t _readDataFromCacheOrContent(uint8_t* data, const size_t len);
+    size_t _fillBufferAndProcessTemplates(uint8_t* buf, size_t maxLen);
+  protected:
+    AwsTemplateProcessor _callback;
+  public:
+    AsyncAbstractResponse(AwsTemplateProcessor callback=nullptr);
+    void _respond(AsyncWebServerRequest *request);
+    size_t _ack(AsyncWebServerRequest *request, size_t len, uint32_t time);
+    bool _sourceValid() const { return false; }
+    virtual size_t _fillBuffer(uint8_t *buf __attribute__((unused)), size_t maxLen __attribute__((unused))) { return 0; }
+};
+
+#ifndef TEMPLATE_PLACEHOLDER
+#define TEMPLATE_PLACEHOLDER '%'
+#endif
+
+#define TEMPLATE_PARAM_NAME_LENGTH 32
+class AsyncFileResponse: public AsyncAbstractResponse {
+  using File = fs::File;
+  using FS = fs::FS;
+  private:
+    File _content;
+    String _path;
+    void _setContentType(const String& path);
+  public:
+    AsyncFileResponse(FS &fs, const String& path, const String& contentType=String(), bool download=false, AwsTemplateProcessor callback=nullptr);
+    AsyncFileResponse(File content, const String& path, const String& contentType=String(), bool download=false, AwsTemplateProcessor callback=nullptr);
+    ~AsyncFileResponse();
+    bool _sourceValid() const { return !!(_content); }
+    virtual size_t _fillBuffer(uint8_t *buf, size_t maxLen) override;
+};
+
+class AsyncStreamResponse: public AsyncAbstractResponse {
+  private:
+    Stream *_content;
+  public:
+    AsyncStreamResponse(Stream &stream, const String& contentType, size_t len, AwsTemplateProcessor callback=nullptr);
+    bool _sourceValid() const { return !!(_content); }
+    virtual size_t _fillBuffer(uint8_t *buf, size_t maxLen) override;
+};
+
+class AsyncCallbackResponse: public AsyncAbstractResponse {
+  private:
+    AwsResponseFiller _content;
+    size_t _filledLength;
+  public:
+    AsyncCallbackResponse(const String& contentType, size_t len, AwsResponseFiller callback, AwsTemplateProcessor templateCallback=nullptr);
+    bool _sourceValid() const { return !!(_content); }
+    virtual size_t _fillBuffer(uint8_t *buf, size_t maxLen) override;
+};
+
+class AsyncChunkedResponse: public AsyncAbstractResponse {
+  private:
+    AwsResponseFiller _content;
+    size_t _filledLength;
+  public:
+    AsyncChunkedResponse(const String& contentType, AwsResponseFiller callback, AwsTemplateProcessor templateCallback=nullptr);
+    bool _sourceValid() const { return !!(_content); }
+    virtual size_t _fillBuffer(uint8_t *buf, size_t maxLen) override;
+};
+
+class AsyncProgmemResponse: public AsyncAbstractResponse {
+  private:
+    const uint8_t * _content;
+    size_t _readLength;
+  public:
+    AsyncProgmemResponse(int code, const String& contentType, const uint8_t * content, size_t len, AwsTemplateProcessor callback=nullptr);
+    bool _sourceValid() const { return true; }
+    virtual size_t _fillBuffer(uint8_t *buf, size_t maxLen) override;
+};
+
+class cbuf;
+
+class AsyncResponseStream: public AsyncAbstractResponse, public Print {
+  private:
+    std::unique_ptr<cbuf> _content;
+  public:
+    AsyncResponseStream(const String& contentType, size_t bufferSize);
+    ~AsyncResponseStream();
+    bool _sourceValid() const { return (_state < RESPONSE_END); }
+    virtual size_t _fillBuffer(uint8_t *buf, size_t maxLen) override;
+    size_t write(const uint8_t *data, size_t len);
+    size_t write(uint8_t data);
+    using Print::write;
+};
+
+#endif /* ASYNCWEBSERVERRESPONSEIMPL_H_ */

libraries/ESPAsyncWebServer/src/WebResponses.cpp

@@ -0,0 +1,704 @@
+/*
+  Asynchronous WebServer library for Espressif MCUs
+
+  Copyright (c) 2016 Hristo Gochkov. All rights reserved.
+  This file is part of the esp8266 core for Arduino environment.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+#include "ESPAsyncWebServer.h"
+#include "WebResponseImpl.h"
+#include "cbuf.h"
+
+// Since ESP8266 does not link memchr by default, here's its implementation.
+void* memchr(void* ptr, int ch, size_t count)
+{
+  unsigned char* p = static_cast<unsigned char*>(ptr);
+  while(count--)
+    if(*p++ == static_cast<unsigned char>(ch))
+      return --p;
+  return nullptr;
+}
+
+
+/*
+ * Abstract Response
+ * */
+const char* AsyncWebServerResponse::_responseCodeToString(int code) {
+  return reinterpret_cast<const char *>(responseCodeToString(code));
+}
+
+const __FlashStringHelper *AsyncWebServerResponse::responseCodeToString(int code) {
+  switch (code) {
+    case 100: return F("Continue");
+    case 101: return F("Switching Protocols");
+    case 200: return F("OK");
+    case 201: return F("Created");
+    case 202: return F("Accepted");
+    case 203: return F("Non-Authoritative Information");
+    case 204: return F("No Content");
+    case 205: return F("Reset Content");
+    case 206: return F("Partial Content");
+    case 300: return F("Multiple Choices");
+    case 301: return F("Moved Permanently");
+    case 302: return F("Found");
+    case 303: return F("See Other");
+    case 304: return F("Not Modified");
+    case 305: return F("Use Proxy");
+    case 307: return F("Temporary Redirect");
+    case 400: return F("Bad Request");
+    case 401: return F("Unauthorized");
+    case 402: return F("Payment Required");
+    case 403: return F("Forbidden");
+    case 404: return F("Not Found");
+    case 405: return F("Method Not Allowed");
+    case 406: return F("Not Acceptable");
+    case 407: return F("Proxy Authentication Required");
+    case 408: return F("Request Time-out");
+    case 409: return F("Conflict");
+    case 410: return F("Gone");
+    case 411: return F("Length Required");
+    case 412: return F("Precondition Failed");
+    case 413: return F("Request Entity Too Large");
+    case 414: return F("Request-URI Too Large");
+    case 415: return F("Unsupported Media Type");
+    case 416: return F("Requested range not satisfiable");
+    case 417: return F("Expectation Failed");
+    case 500: return F("Internal Server Error");
+    case 501: return F("Not Implemented");
+    case 502: return F("Bad Gateway");
+    case 503: return F("Service Unavailable");
+    case 504: return F("Gateway Time-out");
+    case 505: return F("HTTP Version not supported");
+    default:  return F("");
+  }
+}
+
+AsyncWebServerResponse::AsyncWebServerResponse()
+  : _code(0)
+  , _contentType()
+  , _contentLength(0)
+  , _sendContentLength(true)
+  , _chunked(false)
+  , _headLength(0)
+  , _sentLength(0)
+  , _ackedLength(0)
+  , _writtenLength(0)
+  , _state(RESPONSE_SETUP)
+{
+  for(const auto &header: DefaultHeaders::Instance()) {
+    _headers.emplace_back(header);
+  }
+}
+
+AsyncWebServerResponse::~AsyncWebServerResponse() = default;
+
+void AsyncWebServerResponse::setCode(int code){
+  if(_state == RESPONSE_SETUP)
+    _code = code;
+}
+
+void AsyncWebServerResponse::setContentLength(size_t len){
+  if(_state == RESPONSE_SETUP)
+    _contentLength = len;
+}
+
+void AsyncWebServerResponse::setContentType(const String& type){
+  if(_state == RESPONSE_SETUP)
+    _contentType = type;
+}
+
+void AsyncWebServerResponse::addHeader(const String& name, const String& value){
+  _headers.emplace_back(name, value);
+}
+
+String AsyncWebServerResponse::_assembleHead(uint8_t version){
+  if(version){
+    addHeader(F("Accept-Ranges"), F("none"));
+    if(_chunked)
+      addHeader(F("Transfer-Encoding"), F("chunked"));
+  }
+  String out = String();
+  int bufSize = 300;
+  char buf[bufSize];
+
+  snprintf_P(buf, bufSize, PSTR("HTTP/1.%d %d %s\r\n"), version, _code, _responseCodeToString(_code));
+  out.concat(buf);
+
+  if(_sendContentLength) {
+    snprintf_P(buf, bufSize, PSTR("Content-Length: %d\r\n"), _contentLength);
+    out.concat(buf);
+  }
+  if(_contentType.length()) {
+    snprintf_P(buf, bufSize, PSTR("Content-Type: %s\r\n"), _contentType.c_str());
+    out.concat(buf);
+  }
+
+  for(const auto& header: _headers){
+    snprintf_P(buf, bufSize, PSTR("%s: %s\r\n"), header.name().c_str(), header.value().c_str());
+    out.concat(buf);
+  }
+  _headers.clear();
+
+  out.concat(F("\r\n"));
+  _headLength = out.length();
+  return out;
+}
+
+bool AsyncWebServerResponse::_started() const { return _state > RESPONSE_SETUP; }
+bool AsyncWebServerResponse::_finished() const { return _state > RESPONSE_WAIT_ACK; }
+bool AsyncWebServerResponse::_failed() const { return _state == RESPONSE_FAILED; }
+bool AsyncWebServerResponse::_sourceValid() const { return false; }
+void AsyncWebServerResponse::_respond(AsyncWebServerRequest *request){ _state = RESPONSE_END; request->client()->close(); }
+size_t AsyncWebServerResponse::_ack(AsyncWebServerRequest *request, size_t len, uint32_t time){ (void)request; (void)len; (void)time; return 0; }
+
+/*
+ * String/Code Response
+ * */
+AsyncBasicResponse::AsyncBasicResponse(int code, const String& contentType, const String& content){
+  _code = code;
+  _content = content;
+  _contentType = contentType;
+  if(_content.length()){
+    _contentLength = _content.length();
+    if(!_contentType.length())
+      _contentType = F("text/plain");
+  }
+  addHeader(F("Connection"), F("close"));
+}
+
+void AsyncBasicResponse::_respond(AsyncWebServerRequest *request){
+  _state = RESPONSE_HEADERS;
+  String out = _assembleHead(request->version());
+  size_t outLen = out.length();
+  size_t space = request->client()->space();
+  if(!_contentLength && space >= outLen){
+    _writtenLength += request->client()->write(out.c_str(), outLen);
+    _state = RESPONSE_WAIT_ACK;
+  } else if(_contentLength && space >= outLen + _contentLength){
+    out += _content;
+    outLen += _contentLength;
+    _writtenLength += request->client()->write(out.c_str(), outLen);
+    _state = RESPONSE_WAIT_ACK;
+  } else if(space && space < outLen){
+    String partial = out.substring(0, space);
+    _content = out.substring(space) + _content;
+    _contentLength += outLen - space;
+    _writtenLength += request->client()->write(partial.c_str(), partial.length());
+    _state = RESPONSE_CONTENT;
+  } else if(space > outLen && space < (outLen + _contentLength)){
+    size_t shift = space - outLen;
+    outLen += shift;
+    _sentLength += shift;
+    out += _content.substring(0, shift);
+    _content = _content.substring(shift);
+    _writtenLength += request->client()->write(out.c_str(), outLen);
+    _state = RESPONSE_CONTENT;
+  } else {
+    _content = out + _content;
+    _contentLength += outLen;
+    _state = RESPONSE_CONTENT;
+  }
+}
+
+size_t AsyncBasicResponse::_ack(AsyncWebServerRequest *request, size_t len, uint32_t time){
+  (void)time;
+  _ackedLength += len;
+  if(_state == RESPONSE_CONTENT){
+    size_t available = _contentLength - _sentLength;
+    size_t space = request->client()->space();
+    //we can fit in this packet
+    if(space > available){
+      _writtenLength += request->client()->write(_content.c_str(), available);
+      _content = String();
+      _state = RESPONSE_WAIT_ACK;
+      return available;
+    }
+    //send some data, the rest on ack
+    String out = _content.substring(0, space);
+    _content = _content.substring(space);
+    _sentLength += space;
+    _writtenLength += request->client()->write(out.c_str(), space);
+    return space;
+  } else if(_state == RESPONSE_WAIT_ACK){
+    if(_ackedLength >= _writtenLength){
+      _state = RESPONSE_END;
+    }
+  }
+  return 0;
+}
+
+
+/*
+ * Abstract Response
+ * */
+
+AsyncAbstractResponse::AsyncAbstractResponse(AwsTemplateProcessor callback): _callback(callback)
+{
+  // In case of template processing, we're unable to determine real response size
+  if(callback) {
+    _contentLength = 0;
+    _sendContentLength = false;
+    _chunked = true;
+  }
+}
+
+void AsyncAbstractResponse::_respond(AsyncWebServerRequest *request){
+  addHeader(F("Connection"), F("close"));
+  _head = _assembleHead(request->version());
+  _state = RESPONSE_HEADERS;
+  _ack(request, 0, 0);
+}
+
+size_t AsyncAbstractResponse::_ack(AsyncWebServerRequest *request, size_t len, uint32_t time){
+  (void)time;
+  if(!_sourceValid()){
+    _state = RESPONSE_FAILED;
+    request->client()->close();
+    return 0;
+  }
+  _ackedLength += len;
+  size_t space = request->client()->space();
+
+  size_t headLen = _head.length();
+  if(_state == RESPONSE_HEADERS){
+    if(space >= headLen){
+      _state = RESPONSE_CONTENT;
+      space -= headLen;
+    } else {
+      String out = _head.substring(0, space);
+      _head = _head.substring(space);
+      _writtenLength += request->client()->write(out.c_str(), out.length());
+      return out.length();
+    }
+  }
+
+  if(_state == RESPONSE_CONTENT){
+    size_t outLen;
+    if(_chunked){
+      if(space <= 8){
+        return 0;
+      }
+      outLen = space;
+    } else if(!_sendContentLength){
+      outLen = space;
+    } else {
+      outLen = ((_contentLength - _sentLength) > space)?space:(_contentLength - _sentLength);
+    }
+
+    uint8_t *buf = (uint8_t *)malloc(outLen+headLen);
+    if (!buf) {
+      // os_printf("_ack malloc %d failed\n", outLen+headLen);
+      return 0;
+    }
+
+    if(headLen){
+      memcpy(buf, _head.c_str(), _head.length());
+    }
+
+    size_t readLen = 0;
+
+    if(_chunked){
+      // HTTP 1.1 allows leading zeros in chunk length. Or spaces may be added.
+      // See RFC2616 sections 2, 3.6.1.
+      readLen = _fillBufferAndProcessTemplates(buf+headLen+6, outLen - 8);
+      if(readLen == RESPONSE_TRY_AGAIN){
+          free(buf);
+          return 0;
+      }
+      outLen = sprintf_P((char*)buf+headLen, PSTR("%x"), readLen) + headLen;
+      while(outLen < headLen + 4) buf[outLen++] = ' ';
+      buf[outLen++] = '\r';
+      buf[outLen++] = '\n';
+      outLen += readLen;
+      buf[outLen++] = '\r';
+      buf[outLen++] = '\n';
+    } else {
+      readLen = _fillBufferAndProcessTemplates(buf+headLen, outLen);
+      if(readLen == RESPONSE_TRY_AGAIN){
+          free(buf);
+          return 0;
+      }
+      outLen = readLen + headLen;
+    }
+
+    if(headLen){
+        _head = String();
+    }
+
+    if(outLen){
+        _writtenLength += request->client()->write((const char*)buf, outLen);
+    }
+
+    if(_chunked){
+        _sentLength += readLen;
+    } else {
+        _sentLength += outLen - headLen;
+    }
+
+    free(buf);
+
+    if((_chunked && readLen == 0) || (!_sendContentLength && outLen == 0) || (!_chunked && _sentLength == _contentLength)){
+      _state = RESPONSE_WAIT_ACK;
+    }
+    return outLen;
+
+  } else if(_state == RESPONSE_WAIT_ACK){
+    if(!_sendContentLength || _ackedLength >= _writtenLength){
+      _state = RESPONSE_END;
+      if(!_chunked && !_sendContentLength)
+        request->client()->close(true);
+    }
+  }
+  return 0;
+}
+
+size_t AsyncAbstractResponse::_readDataFromCacheOrContent(uint8_t* data, const size_t len)
+{
+    // If we have something in cache, copy it to buffer
+    const size_t readFromCache = std::min(len, _cache.size());
+    if(readFromCache) {
+      memcpy(data, _cache.data(), readFromCache);
+      _cache.erase(_cache.begin(), _cache.begin() + readFromCache);
+    }
+    // If we need to read more...
+    const size_t needFromFile = len - readFromCache;
+    const size_t readFromContent = _fillBuffer(data + readFromCache, needFromFile);
+    return readFromCache + readFromContent;
+}
+
+size_t AsyncAbstractResponse::_fillBufferAndProcessTemplates(uint8_t* data, size_t len)
+{
+  if(!_callback)
+    return _fillBuffer(data, len);
+
+  const size_t originalLen = len;
+  len = _readDataFromCacheOrContent(data, len);
+  // Now we've read 'len' bytes, either from cache or from file
+  // Search for template placeholders
+  uint8_t* pTemplateStart = data;
+  while((pTemplateStart < &data[len]) && (pTemplateStart = (uint8_t*)memchr(pTemplateStart, TEMPLATE_PLACEHOLDER, &data[len - 1] - pTemplateStart + 1))) { // data[0] ... data[len - 1]
+    uint8_t* pTemplateEnd = (pTemplateStart < &data[len - 1]) ? (uint8_t*)memchr(pTemplateStart + 1, TEMPLATE_PLACEHOLDER, &data[len - 1] - pTemplateStart) : nullptr;
+    // temporary buffer to hold parameter name
+    uint8_t buf[TEMPLATE_PARAM_NAME_LENGTH + 1];
+    String paramName;
+    // If closing placeholder is found:
+    if(pTemplateEnd) {
+      // prepare argument to callback
+      const size_t paramNameLength = std::min((size_t)sizeof(buf) - 1, (size_t)(pTemplateEnd - pTemplateStart - 1));
+      if(paramNameLength) {
+        memcpy(buf, pTemplateStart + 1, paramNameLength);
+        buf[paramNameLength] = 0;
+        paramName = String(reinterpret_cast<char*>(buf));
+      } else { // double percent sign encountered, this is single percent sign escaped.
+        // remove the 2nd percent sign
+        memmove(pTemplateEnd, pTemplateEnd + 1, &data[len] - pTemplateEnd - 1);
+        len += _readDataFromCacheOrContent(&data[len - 1], 1) - 1;
+        ++pTemplateStart;
+      }
+    } else if(&data[len - 1] - pTemplateStart + 1 < TEMPLATE_PARAM_NAME_LENGTH + 2) { // closing placeholder not found, check if it's in the remaining file data
+      memcpy(buf, pTemplateStart + 1, &data[len - 1] - pTemplateStart);
+      const size_t readFromCacheOrContent = _readDataFromCacheOrContent(buf + (&data[len - 1] - pTemplateStart), TEMPLATE_PARAM_NAME_LENGTH + 2 - (&data[len - 1] - pTemplateStart + 1));
+      if(readFromCacheOrContent) {
+        pTemplateEnd = (uint8_t*)memchr(buf + (&data[len - 1] - pTemplateStart), TEMPLATE_PLACEHOLDER, readFromCacheOrContent);
+        if(pTemplateEnd) {
+          // prepare argument to callback
+          *pTemplateEnd = 0;
+          paramName = String(reinterpret_cast<char*>(buf));
+          // Copy remaining read-ahead data into cache
+          _cache.insert(_cache.begin(), pTemplateEnd + 1, buf + (&data[len - 1] - pTemplateStart) + readFromCacheOrContent);
+          pTemplateEnd = &data[len - 1];
+        }
+        else // closing placeholder not found in file data, store found percent symbol as is and advance to the next position
+        {
+          // but first, store read file data in cache
+          _cache.insert(_cache.begin(), buf + (&data[len - 1] - pTemplateStart), buf + (&data[len - 1] - pTemplateStart) + readFromCacheOrContent);
+          ++pTemplateStart;
+        }
+      }
+      else // closing placeholder not found in content data, store found percent symbol as is and advance to the next position
+        ++pTemplateStart;
+    }
+    else // closing placeholder not found in content data, store found percent symbol as is and advance to the next position
+      ++pTemplateStart;
+    if(paramName.length()) {
+      // call callback and replace with result.
+      // Everything in range [pTemplateStart, pTemplateEnd] can be safely replaced with parameter value.
+      // Data after pTemplateEnd may need to be moved.
+      // The first byte of data after placeholder is located at pTemplateEnd + 1.
+      // It should be located at pTemplateStart + numBytesCopied (to begin right after inserted parameter value).
+      const String paramValue(_callback(paramName));
+      const char* pvstr = paramValue.c_str();
+      const unsigned int pvlen = paramValue.length();
+      const size_t numBytesCopied = std::min(pvlen, static_cast<unsigned int>(&data[originalLen - 1] - pTemplateStart + 1));
+      // make room for param value
+      // 1. move extra data to cache if parameter value is longer than placeholder AND if there is no room to store
+      if((pTemplateEnd + 1 < pTemplateStart + numBytesCopied) && (originalLen - (pTemplateStart + numBytesCopied - pTemplateEnd - 1) < len)) {
+        _cache.insert(_cache.begin(), &data[originalLen - (pTemplateStart + numBytesCopied - pTemplateEnd - 1)], &data[len]);
+        //2. parameter value is longer than placeholder text, push the data after placeholder which not saved into cache further to the end
+        memmove(pTemplateStart + numBytesCopied, pTemplateEnd + 1, &data[originalLen] - pTemplateStart - numBytesCopied);
+        len = originalLen; // fix issue with truncated data, not sure if it has any side effects
+      } else if(pTemplateEnd + 1 != pTemplateStart + numBytesCopied)
+        //2. Either parameter value is shorter than placeholder text OR there is enough free space in buffer to fit.
+        //   Move the entire data after the placeholder
+        memmove(pTemplateStart + numBytesCopied, pTemplateEnd + 1, &data[len] - pTemplateEnd - 1);
+      // 3. replace placeholder with actual value
+      memcpy(pTemplateStart, pvstr, numBytesCopied);
+      // If result is longer than buffer, copy the remainder into cache (this could happen only if placeholder text itself did not fit entirely in buffer)
+      if(numBytesCopied < pvlen) {
+        _cache.insert(_cache.begin(), pvstr + numBytesCopied, pvstr + pvlen);
+      } else if(pTemplateStart + numBytesCopied < pTemplateEnd + 1) { // result is copied fully; if result is shorter than placeholder text...
+        // there is some free room, fill it from cache
+        const size_t roomFreed = pTemplateEnd + 1 - pTemplateStart - numBytesCopied;
+        const size_t totalFreeRoom = originalLen - len + roomFreed;
+        len += _readDataFromCacheOrContent(&data[len - roomFreed], totalFreeRoom) - roomFreed;
+      } else { // result is copied fully; it is longer than placeholder text
+        const size_t roomTaken = pTemplateStart + numBytesCopied - pTemplateEnd - 1;
+        len = std::min(len + roomTaken, originalLen);
+      }
+    }
+  } // while(pTemplateStart)
+  return len;
+}
+
+
+/*
+ * File Response
+ * */
+
+AsyncFileResponse::~AsyncFileResponse(){
+  if(_content)
+    _content.close();
+}
+
+void AsyncFileResponse::_setContentType(const String& path){
+#if HAVE_EXTERN_GET_CONTENT_TYPE_FUNCTION
+  extern const __FlashStringHelper *getContentType(const String &path);
+  _contentType = getContentType(path);
+#else
+  if (path.endsWith(F(".html"))) _contentType = F("text/html");
+  else if (path.endsWith(F(".htm"))) _contentType = F("text/html");
+  else if (path.endsWith(F(".css"))) _contentType = F("text/css");
+  else if (path.endsWith(F(".json"))) _contentType = F("application/json");
+  else if (path.endsWith(F(".js"))) _contentType = F("application/javascript");
+  else if (path.endsWith(F(".png"))) _contentType = F("image/png");
+  else if (path.endsWith(F(".gif"))) _contentType = F("image/gif");
+  else if (path.endsWith(F(".jpg"))) _contentType = F("image/jpeg");
+  else if (path.endsWith(F(".ico"))) _contentType = F("image/x-icon");
+  else if (path.endsWith(F(".svg"))) _contentType = F("image/svg+xml");
+  else if (path.endsWith(F(".eot"))) _contentType = F("font/eot");
+  else if (path.endsWith(F(".woff"))) _contentType = F("font/woff");
+  else if (path.endsWith(F(".woff2"))) _contentType = F("font/woff2");
+  else if (path.endsWith(F(".ttf"))) _contentType = F("font/ttf");
+  else if (path.endsWith(F(".xml"))) _contentType = F("text/xml");
+  else if (path.endsWith(F(".pdf"))) _contentType = F("application/pdf");
+  else if (path.endsWith(F(".zip"))) _contentType = F("application/zip");
+  else if(path.endsWith(F(".gz"))) _contentType = F("application/x-gzip");
+  else _contentType = F("text/plain");
+#endif
+}
+
+AsyncFileResponse::AsyncFileResponse(FS &fs, const String& path, const String& contentType, bool download, AwsTemplateProcessor callback): AsyncAbstractResponse(callback){
+  _code = 200;
+  _path = path;
+
+  if(!download && !fs.exists(_path) && fs.exists(_path + F(".gz"))){
+    _path = _path + F(".gz");
+    addHeader(F("Content-Encoding"), F("gzip"));
+    _callback = nullptr; // Unable to process zipped templates
+    _sendContentLength = true;
+    _chunked = false;
+  }
+
+  _content = fs.open(_path, fs::FileOpenMode::read);
+  _contentLength = _content.size();
+
+  if(contentType.length() == 0)
+    _setContentType(path);
+  else
+    _contentType = contentType;
+
+  int filenameStart = path.lastIndexOf('/') + 1;
+  char buf[26+path.length()-filenameStart];
+  char* filename = (char*)path.c_str() + filenameStart;
+
+  if(download) {
+    // set filename and force download
+    snprintf_P(buf, sizeof (buf), PSTR("attachment; filename=\"%s\""), filename);
+  } else {
+    // set filename and force rendering
+    snprintf_P(buf, sizeof (buf), PSTR("inline"));
+  }
+  addHeader(F("Content-Disposition"), buf);
+}
+
+AsyncFileResponse::AsyncFileResponse(File content, const String& path, const String& contentType, bool download, AwsTemplateProcessor callback): AsyncAbstractResponse(callback){
+  _code = 200;
+  _path = path;
+
+  if(!download && String(content.name()).endsWith(F(".gz")) && !path.endsWith(F(".gz"))){
+    addHeader(F("Content-Encoding"), F("gzip"));
+    _callback = nullptr; // Unable to process gzipped templates
+    _sendContentLength = true;
+    _chunked = false;
+  }
+
+  _content = content;
+  _contentLength = _content.size();
+
+  if(contentType.length() == 0)
+    _setContentType(path);
+  else
+    _contentType = contentType;
+
+  int filenameStart = path.lastIndexOf('/') + 1;
+  char buf[26+path.length()-filenameStart];
+  char* filename = (char*)path.c_str() + filenameStart;
+
+  if(download) {
+    snprintf_P(buf, sizeof (buf), PSTR("attachment; filename=\"%s\""), filename);
+  } else {
+    snprintf_P(buf, sizeof (buf), PSTR("inline"));
+  }
+  addHeader(F("Content-Disposition"), buf);
+}
+
+size_t AsyncFileResponse::_fillBuffer(uint8_t *data, size_t len){
+  return _content.read(data, len);
+}
+
+/*
+ * Stream Response
+ * */
+
+AsyncStreamResponse::AsyncStreamResponse(Stream &stream, const String& contentType, size_t len, AwsTemplateProcessor callback): AsyncAbstractResponse(callback) {
+  _code = 200;
+  _content = &stream;
+  _contentLength = len;
+  _contentType = contentType;
+}
+
+size_t AsyncStreamResponse::_fillBuffer(uint8_t *data, size_t len){
+  size_t available = _content->available();
+  size_t outLen = (available > len)?len:available;
+  size_t i;
+  for(i=0;i<outLen;i++)
+    data[i] = _content->read();
+  return outLen;
+}
+
+/*
+ * Callback Response
+ * */
+
+AsyncCallbackResponse::AsyncCallbackResponse(const String& contentType, size_t len, AwsResponseFiller callback, AwsTemplateProcessor templateCallback): AsyncAbstractResponse(templateCallback) {
+  _code = 200;
+  _content = callback;
+  _contentLength = len;
+  if(!len)
+    _sendContentLength = false;
+  _contentType = contentType;
+  _filledLength = 0;
+}
+
+size_t AsyncCallbackResponse::_fillBuffer(uint8_t *data, size_t len){
+  size_t ret = _content(data, len, _filledLength);
+  if(ret != RESPONSE_TRY_AGAIN){
+      _filledLength += ret;
+  }
+  return ret;
+}
+
+/*
+ * Chunked Response
+ * */
+
+AsyncChunkedResponse::AsyncChunkedResponse(const String& contentType, AwsResponseFiller callback, AwsTemplateProcessor processorCallback): AsyncAbstractResponse(processorCallback) {
+  _code = 200;
+  _content = callback;
+  _contentLength = 0;
+  _contentType = contentType;
+  _sendContentLength = false;
+  _chunked = true;
+  _filledLength = 0;
+}
+
+size_t AsyncChunkedResponse::_fillBuffer(uint8_t *data, size_t len){
+  size_t ret = _content(data, len, _filledLength);
+  if(ret != RESPONSE_TRY_AGAIN){
+      _filledLength += ret;
+  }
+  return ret;
+}
+
+/*
+ * Progmem Response
+ * */
+
+AsyncProgmemResponse::AsyncProgmemResponse(int code, const String& contentType, const uint8_t * content, size_t len, AwsTemplateProcessor callback): AsyncAbstractResponse(callback) {
+  _code = code;
+  _content = content;
+  _contentType = contentType;
+  _contentLength = len;
+  _readLength = 0;
+}
+
+size_t AsyncProgmemResponse::_fillBuffer(uint8_t *data, size_t len){
+  size_t left = _contentLength - _readLength;
+  if (left > len) {
+    memcpy_P(data, _content + _readLength, len);
+    _readLength += len;
+    return len;
+  }
+  memcpy_P(data, _content + _readLength, left);
+  _readLength += left;
+  return left;
+}
+
+
+/*
+ * Response Stream (You can print/write/printf to it, up to the contentLen bytes)
+ * */
+
+AsyncResponseStream::AsyncResponseStream(const String& contentType, size_t bufferSize)
+{
+  _code = 200;
+  _contentLength = 0;
+  _contentType = contentType;
+  _content = std::unique_ptr<cbuf>(new cbuf(bufferSize)); //std::make_unique<cbuf>(bufferSize);
+}
+
+AsyncResponseStream::~AsyncResponseStream() = default;
+
+size_t AsyncResponseStream::_fillBuffer(uint8_t *buf, size_t maxLen){
+  return _content->read((char*)buf, maxLen);
+}
+
+size_t AsyncResponseStream::write(const uint8_t *data, size_t len){
+  if(_started())
+    return 0;
+
+  if(len > _content->room()){
+    size_t needed = len - _content->room();
+    _content->resizeAdd(needed);
+  }
+  size_t written = _content->write((const char*)data, len);
+  _contentLength += written;
+  return written;
+}
+
+size_t AsyncResponseStream::write(uint8_t data){
+  return write(&data, 1);
+}

libraries/ESPAsyncWebServer/src/WebServer.cpp

@@ -0,0 +1,198 @@
+/*
+  Asynchronous WebServer library for Espressif MCUs
+
+  Copyright (c) 2016 Hristo Gochkov. All rights reserved.
+  This file is part of the esp8266 core for Arduino environment.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+#include "ESPAsyncWebServer.h"
+#include "WebHandlerImpl.h"
+
+bool ON_STA_FILTER(AsyncWebServerRequest *request) {
+  return WiFi.localIP() == request->client()->localIP();
+}
+
+bool ON_AP_FILTER(AsyncWebServerRequest *request) {
+  return WiFi.localIP() != request->client()->localIP();
+}
+
+#ifndef HAVE_FS_FILE_OPEN_MODE
+const char *fs::FileOpenMode::read = "r";
+const char *fs::FileOpenMode::write = "w";
+const char *fs::FileOpenMode::append = "a";
+#endif
+
+AsyncWebServer::AsyncWebServer(uint16_t port)
+  : _server(port)
+  , _rewrites(AlternativeLinkedList<AsyncWebRewrite*>([](AsyncWebRewrite* r){ delete r; }))
+  , _handlers(AlternativeLinkedList<AsyncWebHandler*>([](AsyncWebHandler* h){ delete h; }))
+{
+  _catchAllHandler = new AsyncCallbackWebHandler();
+  if(_catchAllHandler == NULL)
+    return;
+  _server.onClient([](void *s, AsyncClient* c){
+    if(c == NULL)
+      return;
+    c->setRxTimeout(3);
+    AsyncWebServerRequest *r = new AsyncWebServerRequest((AsyncWebServer*)s, c);
+    if(r == NULL){
+      c->close(true);
+      c->free();
+      delete c;
+    }
+  }, this);
+}
+
+AsyncWebServer::~AsyncWebServer(){
+  reset();
+  end();
+  if(_catchAllHandler) delete _catchAllHandler;
+}
+
+AsyncWebRewrite& AsyncWebServer::addRewrite(AsyncWebRewrite* rewrite){
+  _rewrites.add(rewrite);
+  return *rewrite;
+}
+
+bool AsyncWebServer::removeRewrite(AsyncWebRewrite *rewrite){
+  return _rewrites.remove(rewrite);
+}
+
+AsyncWebRewrite& AsyncWebServer::rewrite(const char* from, const char* to){
+  return addRewrite(new AsyncWebRewrite(from, to));
+}
+
+AsyncWebHandler& AsyncWebServer::addHandler(AsyncWebHandler* handler){
+  _handlers.add(handler);
+  return *handler;
+}
+
+bool AsyncWebServer::removeHandler(AsyncWebHandler *handler){
+  return _handlers.remove(handler);
+}
+
+void AsyncWebServer::begin(){
+  _server.setNoDelay(true);
+  _server.begin();
+}
+
+void AsyncWebServer::end(){
+  _server.end();
+}
+
+#if ASYNC_TCP_SSL_ENABLED
+void AsyncWebServer::onSslFileRequest(AcSSlFileHandler cb, void* arg){
+  _server.onSslFileRequest(cb, arg);
+}
+
+void AsyncWebServer::beginSecure(const char *cert, const char *key, const char *password){
+  _server.beginSecure(cert, key, password);
+}
+#endif
+
+void AsyncWebServer::_handleDisconnect(AsyncWebServerRequest *request){
+  delete request;
+}
+
+void AsyncWebServer::_rewriteRequest(AsyncWebServerRequest *request){
+  for(const auto& r: _rewrites){
+    if (r->match(request)){
+      request->_url = r->toUrl();
+      request->_addGetParams(r->params());
+    }
+  }
+}
+
+void AsyncWebServer::_attachHandler(AsyncWebServerRequest *request){
+  for(const auto& h: _handlers){
+    if (h->filter(request) && h->canHandle(request)){
+      request->setHandler(h);
+      return;
+    }
+  }
+
+  request->addInterestingHeader(F("ANY"));
+  request->setHandler(_catchAllHandler);
+}
+
+
+AsyncCallbackWebHandler& AsyncWebServer::on(const char* uri, WebRequestMethodComposite method, ArRequestHandlerFunction onRequest, ArUploadHandlerFunction onUpload, ArBodyHandlerFunction onBody){
+  AsyncCallbackWebHandler* handler = new AsyncCallbackWebHandler();
+  handler->setUri(uri);
+  handler->setMethod(method);
+  handler->onRequest(onRequest);
+  handler->onUpload(onUpload);
+  handler->onBody(onBody);
+  addHandler(handler);
+  return *handler;
+}
+
+AsyncCallbackWebHandler& AsyncWebServer::on(const char* uri, WebRequestMethodComposite method, ArRequestHandlerFunction onRequest, ArUploadHandlerFunction onUpload){
+  AsyncCallbackWebHandler* handler = new AsyncCallbackWebHandler();
+  handler->setUri(uri);
+  handler->setMethod(method);
+  handler->onRequest(onRequest);
+  handler->onUpload(onUpload);
+  addHandler(handler);
+  return *handler;
+}
+
+AsyncCallbackWebHandler& AsyncWebServer::on(const char* uri, WebRequestMethodComposite method, ArRequestHandlerFunction onRequest){
+  AsyncCallbackWebHandler* handler = new AsyncCallbackWebHandler();
+  handler->setUri(uri);
+  handler->setMethod(method);
+  handler->onRequest(onRequest);
+  addHandler(handler);
+  return *handler;
+}
+
+AsyncCallbackWebHandler& AsyncWebServer::on(const char* uri, ArRequestHandlerFunction onRequest){
+  AsyncCallbackWebHandler* handler = new AsyncCallbackWebHandler();
+  handler->setUri(uri);
+  handler->onRequest(onRequest);
+  addHandler(handler);
+  return *handler;
+}
+
+AsyncStaticWebHandler& AsyncWebServer::serveStatic(const char* uri, fs::FS& fs, const char* path, const char* cache_control){
+  AsyncStaticWebHandler* handler = new AsyncStaticWebHandler(uri, fs, path, cache_control);
+  addHandler(handler);
+  return *handler;
+}
+
+void AsyncWebServer::onNotFound(ArRequestHandlerFunction fn){
+  _catchAllHandler->onRequest(fn);
+}
+
+void AsyncWebServer::onFileUpload(ArUploadHandlerFunction fn){
+  _catchAllHandler->onUpload(fn);
+}
+
+void AsyncWebServer::onRequestBody(ArBodyHandlerFunction fn){
+  _catchAllHandler->onBody(fn);
+}
+
+void AsyncWebServer::reset(){
+  _rewrites.free();
+  _handlers.free();
+
+  if (_catchAllHandler != NULL){
+    _catchAllHandler->onRequest(NULL);
+    _catchAllHandler->onUpload(NULL);
+    _catchAllHandler->onBody(NULL);
+  }
+}
+