mirror of
https://github.com/HackTricks-wiki/hacktricks-cloud.git
synced 2025-12-05 20:40:18 -08:00
update searcher
This commit is contained in:
Carlos Polop
10
theme/elasticlunr.min.js
vendored
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10
theme/elasticlunr.min.js
vendored
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File diff suppressed because one or more lines are too long
@@ -1,554 +1,172 @@
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/* ────────────────────────────────────────────────────────────────
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Polyfill so requestIdleCallback works everywhere (IE 11/Safari)
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─────────────────────────────────────────────────────────────── */
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if (typeof window.requestIdleCallback !== "function") {
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window.requestIdleCallback = function (cb) {
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const start = Date.now();
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return setTimeout(function () {
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cb({
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didTimeout: false,
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timeRemaining: function () {
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return Math.max(0, 50 - (Date.now() - start));
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}
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});
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}, 1);
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};
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window.cancelIdleCallback = window.clearTimeout;
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}
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/* ────────────────────────────────────────────────────────────────
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search.js
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─────────────────────────────────────────────────────────────── */
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"use strict";
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window.search = window.search || {};
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(function search(search) {
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// Search functionality
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//
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// You can use !hasFocus() to prevent keyhandling in your key
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// event handlers while the user is typing their search.
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if (!Mark || !elasticlunr) {
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return;
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}
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//IE 11 Compatibility from https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/startsWith
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if (!String.prototype.startsWith) {
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String.prototype.startsWith = function(search, pos) {
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return this.substr(!pos || pos < 0 ? 0 : +pos, search.length) === search;
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};
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}
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var search_wrap = document.getElementById('search-wrapper'),
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search_modal = document.getElementById('search-modal'),
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searchbar = document.getElementById('searchbar'),
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searchbar_outer = document.getElementById('searchbar-outer'),
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searchresults = document.getElementById('searchresults'),
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searchresults_outer = document.getElementById('searchresults-outer'),
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searchresults_header = document.getElementById('searchresults-header'),
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searchicon = document.getElementById('search-toggle'),
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content = document.getElementById('content'),
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searchindex = null,
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doc_urls = [],
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results_options = {
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teaser_word_count: 30,
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limit_results: 30,
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},
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search_options = {
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bool: "AND",
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expand: true,
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fields: {
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title: {boost: 1},
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body: {boost: 1},
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breadcrumbs: {boost: 0}
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}
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},
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mark_exclude = [],
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marker = new Mark(content),
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current_searchterm = "",
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URL_SEARCH_PARAM = 'search',
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URL_MARK_PARAM = 'highlight',
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teaser_count = 0,
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SEARCH_HOTKEY_KEYCODE = 83,
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ESCAPE_KEYCODE = 27,
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DOWN_KEYCODE = 40,
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UP_KEYCODE = 38,
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SELECT_KEYCODE = 13;
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function hasFocus() {
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return searchbar === document.activeElement;
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}
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function removeChildren(elem) {
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while (elem.firstChild) {
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elem.removeChild(elem.firstChild);
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}
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}
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||||
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||||
// Helper to parse a url into its building blocks.
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function parseURL(url) {
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var a = document.createElement('a');
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a.href = url;
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return {
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source: url,
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protocol: a.protocol.replace(':',''),
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host: a.hostname,
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port: a.port,
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params: (function(){
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var ret = {};
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var seg = a.search.replace(/^\?/,'').split('&');
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var len = seg.length, i = 0, s;
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for (;i<len;i++) {
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if (!seg[i]) { continue; }
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s = seg[i].split('=');
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ret[s[0]] = s[1];
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}
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return ret;
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})(),
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file: (a.pathname.match(/\/([^/?#]+)$/i) || [,''])[1],
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hash: a.hash.replace('#',''),
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path: a.pathname.replace(/^([^/])/,'/$1')
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};
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}
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// Helper to recreate a url string from its building blocks.
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function renderURL(urlobject) {
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var url = urlobject.protocol + "://" + urlobject.host;
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if (urlobject.port != "") {
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url += ":" + urlobject.port;
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}
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url += urlobject.path;
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var joiner = "?";
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for(var prop in urlobject.params) {
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if(urlobject.params.hasOwnProperty(prop)) {
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url += joiner + prop + "=" + urlobject.params[prop];
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joiner = "&";
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}
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}
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if (urlobject.hash != "") {
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url += "#" + urlobject.hash;
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}
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return url;
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}
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// Helper to escape html special chars for displaying the teasers
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var escapeHTML = (function() {
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var MAP = {
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'&': '&',
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'<': '<',
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'>': '>',
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'"': '"',
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"'": '''
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};
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var repl = function(c) { return MAP[c]; };
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return function(s) {
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return s.replace(/[&<>'"]/g, repl);
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};
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})();
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function formatSearchMetric(count, searchterm) {
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if (count == 1) {
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return count + " search result for '" + searchterm + "':";
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} else if (count == 0) {
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return "No search results for '" + searchterm + "'.";
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} else {
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return count + " search results for '" + searchterm + "':";
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}
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}
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function formatSearchResult(result, searchterms) {
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var teaser = makeTeaser(escapeHTML(result.doc.body), searchterms);
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teaser_count++;
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// The ?URL_MARK_PARAM= parameter belongs inbetween the page and the #heading-anchor
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var url = doc_urls[result.ref].split("#");
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if (url.length == 1) { // no anchor found
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url.push("");
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}
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// encodeURIComponent escapes all chars that could allow an XSS except
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// for '. Due to that we also manually replace ' with its url-encoded
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// representation (%27).
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var searchterms = encodeURIComponent(searchterms.join(" ")).replace(/\'/g, "%27");
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return '<a href="' + path_to_root + url[0] + '?' + URL_MARK_PARAM + '=' + searchterms + '#' + url[1]
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+ '" aria-details="teaser_' + teaser_count + '">' + result.doc.breadcrumbs
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+ '<span class="teaser" id="teaser_' + teaser_count + '" aria-label="Search Result Teaser">'
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+ teaser + '</span>' + '</a>';
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}
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function makeTeaser(body, searchterms) {
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// The strategy is as follows:
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// First, assign a value to each word in the document:
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// Words that correspond to search terms (stemmer aware): 40
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// Normal words: 2
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// First word in a sentence: 8
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// Then use a sliding window with a constant number of words and count the
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// sum of the values of the words within the window. Then use the window that got the
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// maximum sum. If there are multiple maximas, then get the last one.
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// Enclose the terms in <em>.
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var stemmed_searchterms = searchterms.map(function(w) {
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return elasticlunr.stemmer(w.toLowerCase());
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});
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var searchterm_weight = 40;
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var weighted = []; // contains elements of ["word", weight, index_in_document]
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// split in sentences, then words
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var sentences = body.toLowerCase().split('. ');
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var index = 0;
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var value = 0;
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var searchterm_found = false;
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for (var sentenceindex in sentences) {
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var words = sentences[sentenceindex].split(' ');
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value = 8;
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for (var wordindex in words) {
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var word = words[wordindex];
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if (word.length > 0) {
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for (var searchtermindex in stemmed_searchterms) {
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if (elasticlunr.stemmer(word).startsWith(stemmed_searchterms[searchtermindex])) {
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value = searchterm_weight;
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searchterm_found = true;
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}
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};
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weighted.push([word, value, index]);
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value = 2;
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}
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index += word.length;
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index += 1; // ' ' or '.' if last word in sentence
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};
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index += 1; // because we split at a two-char boundary '. '
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};
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if (weighted.length == 0) {
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return body;
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}
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var window_weight = [];
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var window_size = Math.min(weighted.length, results_options.teaser_word_count);
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var cur_sum = 0;
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for (var wordindex = 0; wordindex < window_size; wordindex++) {
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cur_sum += weighted[wordindex][1];
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};
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window_weight.push(cur_sum);
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for (var wordindex = 0; wordindex < weighted.length - window_size; wordindex++) {
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cur_sum -= weighted[wordindex][1];
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cur_sum += weighted[wordindex + window_size][1];
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window_weight.push(cur_sum);
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};
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if (searchterm_found) {
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var max_sum = 0;
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var max_sum_window_index = 0;
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// backwards
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for (var i = window_weight.length - 1; i >= 0; i--) {
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if (window_weight[i] > max_sum) {
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max_sum = window_weight[i];
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max_sum_window_index = i;
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}
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};
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} else {
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max_sum_window_index = 0;
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}
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// add <em/> around searchterms
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var teaser_split = [];
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var index = weighted[max_sum_window_index][2];
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for (var i = max_sum_window_index; i < max_sum_window_index+window_size; i++) {
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var word = weighted[i];
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if (index < word[2]) {
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// missing text from index to start of `word`
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teaser_split.push(body.substring(index, word[2]));
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index = word[2];
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}
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if (word[1] == searchterm_weight) {
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teaser_split.push("<em>")
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}
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index = word[2] + word[0].length;
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teaser_split.push(body.substring(word[2], index));
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if (word[1] == searchterm_weight) {
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teaser_split.push("</em>")
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}
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};
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return teaser_split.join('');
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}
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function init(config) {
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results_options = config.results_options;
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search_options = config.search_options;
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searchbar_outer = config.searchbar_outer;
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doc_urls = config.doc_urls;
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searchindex = elasticlunr.Index.load(config.index);
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// Set up events
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searchicon.addEventListener('click', function(e) { searchIconClickHandler(); }, false);
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search_wrap.addEventListener('click', function(e) { searchIconClickHandler(); }, false);
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search_modal.addEventListener('click', function(e) { e.stopPropagation(); }, false);
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searchbar.addEventListener('keyup', function(e) { searchbarKeyUpHandler(); }, false);
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document.addEventListener('keydown', function(e) { globalKeyHandler(e); }, false);
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// If the user uses the browser buttons, do the same as if a reload happened
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window.onpopstate = function(e) { doSearchOrMarkFromUrl(); };
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// Suppress "submit" events so the page doesn't reload when the user presses Enter
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document.addEventListener('submit', function(e) { e.preventDefault(); }, false);
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// If reloaded, do the search or mark again, depending on the current url parameters
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doSearchOrMarkFromUrl();
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}
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function unfocusSearchbar() {
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// hacky, but just focusing a div only works once
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var tmp = document.createElement('input');
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tmp.setAttribute('style', 'position: absolute; opacity: 0;');
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searchicon.appendChild(tmp);
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tmp.focus();
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tmp.remove();
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}
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// On reload or browser history backwards/forwards events, parse the url and do search or mark
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function doSearchOrMarkFromUrl() {
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// Check current URL for search request
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var url = parseURL(window.location.href);
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if (url.params.hasOwnProperty(URL_SEARCH_PARAM)
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&& url.params[URL_SEARCH_PARAM] != "") {
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showSearch(true);
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searchbar.value = decodeURIComponent(
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(url.params[URL_SEARCH_PARAM]+'').replace(/\+/g, '%20'));
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searchbarKeyUpHandler(); // -> doSearch()
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} else {
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showSearch(false);
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}
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if (url.params.hasOwnProperty(URL_MARK_PARAM)) {
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var words = decodeURIComponent(url.params[URL_MARK_PARAM]).split(' ');
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marker.mark(words, {
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exclude: mark_exclude
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});
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var markers = document.querySelectorAll("mark");
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function hide() {
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for (var i = 0; i < markers.length; i++) {
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markers[i].classList.add("fade-out");
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window.setTimeout(function(e) { marker.unmark(); }, 300);
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}
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}
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for (var i = 0; i < markers.length; i++) {
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markers[i].addEventListener('click', hide);
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}
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||||
}
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||||
}
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||||
// Eventhandler for keyevents on `document`
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function globalKeyHandler(e) {
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if (e.altKey || e.ctrlKey || e.metaKey || e.shiftKey || e.target.type === 'textarea' || e.target.type === 'text' || !hasFocus() && /^(?:input|select|textarea)$/i.test(e.target.nodeName)) { return; }
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if (e.keyCode === ESCAPE_KEYCODE) {
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e.preventDefault();
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||||
searchbar.classList.remove("active");
|
||||
setSearchUrlParameters("",
|
||||
(searchbar.value.trim() !== "") ? "push" : "replace");
|
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if (hasFocus()) {
|
||||
unfocusSearchbar();
|
||||
}
|
||||
showSearch(false);
|
||||
marker.unmark();
|
||||
} else if (!hasFocus() && e.keyCode === SEARCH_HOTKEY_KEYCODE) {
|
||||
e.preventDefault();
|
||||
showSearch(true);
|
||||
window.scrollTo(0, 0);
|
||||
searchbar.select();
|
||||
} else if (hasFocus() && e.keyCode === DOWN_KEYCODE) {
|
||||
e.preventDefault();
|
||||
unfocusSearchbar();
|
||||
searchresults.firstElementChild.classList.add("focus");
|
||||
} else if (!hasFocus() && (e.keyCode === DOWN_KEYCODE
|
||||
|| e.keyCode === UP_KEYCODE
|
||||
|| e.keyCode === SELECT_KEYCODE)) {
|
||||
// not `:focus` because browser does annoying scrolling
|
||||
var focused = searchresults.querySelector("li.focus");
|
||||
if (!focused) return;
|
||||
e.preventDefault();
|
||||
if (e.keyCode === DOWN_KEYCODE) {
|
||||
var next = focused.nextElementSibling;
|
||||
if (next) {
|
||||
focused.classList.remove("focus");
|
||||
next.classList.add("focus");
|
||||
}
|
||||
} else if (e.keyCode === UP_KEYCODE) {
|
||||
focused.classList.remove("focus");
|
||||
var prev = focused.previousElementSibling;
|
||||
if (prev) {
|
||||
prev.classList.add("focus");
|
||||
} else {
|
||||
searchbar.select();
|
||||
}
|
||||
} else { // SELECT_KEYCODE
|
||||
window.location.assign(focused.querySelector('a'));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
function showSearch(yes) {
|
||||
if (yes) {
|
||||
search_wrap.classList.remove('hidden');
|
||||
searchicon.setAttribute('aria-expanded', 'true');
|
||||
} else {
|
||||
search_wrap.classList.add('hidden');
|
||||
searchicon.setAttribute('aria-expanded', 'false');
|
||||
var results = searchresults.children;
|
||||
for (var i = 0; i < results.length; i++) {
|
||||
results[i].classList.remove("focus");
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
function showResults(yes) {
|
||||
if (yes) {
|
||||
searchresults_outer.classList.remove('hidden');
|
||||
} else {
|
||||
searchresults_outer.classList.add('hidden');
|
||||
}
|
||||
}
|
||||
|
||||
// Eventhandler for search icon
|
||||
function searchIconClickHandler() {
|
||||
if (search_wrap.classList.contains('hidden')) {
|
||||
showSearch(true);
|
||||
window.scrollTo(0, 0);
|
||||
searchbar.select();
|
||||
} else {
|
||||
showSearch(false);
|
||||
}
|
||||
}
|
||||
|
||||
// Eventhandler for keyevents while the searchbar is focused
|
||||
function searchbarKeyUpHandler() {
|
||||
var searchterm = searchbar.value.trim();
|
||||
if (searchterm != "") {
|
||||
searchbar.classList.add("active");
|
||||
doSearch(searchterm);
|
||||
} else {
|
||||
searchbar.classList.remove("active");
|
||||
showResults(false);
|
||||
removeChildren(searchresults);
|
||||
}
|
||||
|
||||
setSearchUrlParameters(searchterm, "push_if_new_search_else_replace");
|
||||
|
||||
// Remove marks
|
||||
marker.unmark();
|
||||
}
|
||||
|
||||
// Update current url with ?URL_SEARCH_PARAM= parameter, remove ?URL_MARK_PARAM and #heading-anchor .
|
||||
// `action` can be one of "push", "replace", "push_if_new_search_else_replace"
|
||||
// and replaces or pushes a new browser history item.
|
||||
// "push_if_new_search_else_replace" pushes if there is no `?URL_SEARCH_PARAM=abc` yet.
|
||||
function setSearchUrlParameters(searchterm, action) {
|
||||
var url = parseURL(window.location.href);
|
||||
var first_search = ! url.params.hasOwnProperty(URL_SEARCH_PARAM);
|
||||
if (searchterm != "" || action == "push_if_new_search_else_replace") {
|
||||
url.params[URL_SEARCH_PARAM] = searchterm;
|
||||
delete url.params[URL_MARK_PARAM];
|
||||
url.hash = "";
|
||||
} else {
|
||||
delete url.params[URL_MARK_PARAM];
|
||||
delete url.params[URL_SEARCH_PARAM];
|
||||
}
|
||||
// A new search will also add a new history item, so the user can go back
|
||||
// to the page prior to searching. A updated search term will only replace
|
||||
// the url.
|
||||
if (action == "push" || (action == "push_if_new_search_else_replace" && first_search) ) {
|
||||
history.pushState({}, document.title, renderURL(url));
|
||||
} else if (action == "replace" || (action == "push_if_new_search_else_replace" && !first_search) ) {
|
||||
history.replaceState({}, document.title, renderURL(url));
|
||||
}
|
||||
}
|
||||
|
||||
function doSearch(searchterm) {
|
||||
|
||||
// Don't search the same twice
|
||||
if (current_searchterm == searchterm) { return; }
|
||||
else { current_searchterm = searchterm; }
|
||||
|
||||
if (searchindex == null) { return; }
|
||||
|
||||
// Do the actual search
|
||||
var results = searchindex.search(searchterm, search_options);
|
||||
var resultcount = Math.min(results.length, results_options.limit_results);
|
||||
|
||||
// Display search metrics
|
||||
searchresults_header.innerText = formatSearchMetric(resultcount, searchterm);
|
||||
|
||||
// Clear and insert results
|
||||
var searchterms = searchterm.split(' ');
|
||||
removeChildren(searchresults);
|
||||
for(var i = 0; i < resultcount ; i++){
|
||||
var resultElem = document.createElement('li');
|
||||
resultElem.innerHTML = formatSearchResult(results[i], searchterms);
|
||||
searchresults.appendChild(resultElem);
|
||||
}
|
||||
|
||||
// Display results
|
||||
showResults(true);
|
||||
}
|
||||
|
||||
(async function loadSearchIndex(lang = window.lang || "en") {
|
||||
const branch = lang === "en" ? "master" : lang;
|
||||
const rawUrl =
|
||||
`https://raw.githubusercontent.com/HackTricks-wiki/hacktricks-cloud/refs/heads/${branch}/searchindex.js`;
|
||||
const localJs = "/searchindex.js";
|
||||
const TIMEOUT_MS = 10_000;
|
||||
|
||||
const injectScript = (src) =>
|
||||
new Promise((resolve, reject) => {
|
||||
const s = document.createElement("script");
|
||||
s.src = src;
|
||||
s.onload = () => resolve(src);
|
||||
s.onerror = (e) => reject(e);
|
||||
document.head.appendChild(s);
|
||||
});
|
||||
|
||||
try {
|
||||
/* 1 — download raw JS from GitHub */
|
||||
const controller = new AbortController();
|
||||
const timer = setTimeout(() => controller.abort(), TIMEOUT_MS);
|
||||
|
||||
const res = await fetch(rawUrl, { signal: controller.signal });
|
||||
clearTimeout(timer);
|
||||
if (!res.ok) throw new Error(`HTTP ${res.status}`);
|
||||
|
||||
/* 2 — wrap in a Blob so the browser sees application/javascript */
|
||||
const code = await res.text();
|
||||
const blobUrl = URL.createObjectURL(
|
||||
new Blob([code], { type: "application/javascript" })
|
||||
);
|
||||
|
||||
/* 3 — execute it */
|
||||
await injectScript(blobUrl);
|
||||
|
||||
/* ───────────── PATCH ─────────────
|
||||
heavy parsing now deferred to idle time
|
||||
/* ht_searcher.js ────────────────────────────────────────────────
|
||||
Dual‑index Web‑Worker search (HackTricks + HackTricks‑Cloud)
|
||||
· keeps working even if one index fails
|
||||
· cloud results rendered **blue**
|
||||
· ⏳ while loading → 🔍 when ready
|
||||
*/
|
||||
requestIdleCallback(() => init(window.search));
|
||||
return; // ✔ UI remains responsive
|
||||
} catch (eRemote) {
|
||||
console.warn("Remote JS failed →", eRemote);
|
||||
}
|
||||
|
||||
/* ───────── fallback: local copy ───────── */
|
||||
(() => {
|
||||
"use strict";
|
||||
|
||||
/* ───────────── 0. helpers (main thread) ───────────── */
|
||||
const clear = el => { while (el.firstChild) el.removeChild(el.firstChild); };
|
||||
|
||||
/* ───────────── 1. Web‑Worker code ─────────────────── */
|
||||
const workerCode = `
|
||||
self.window = self;
|
||||
self.search = self.search || {};
|
||||
const abs = p => location.origin + p;
|
||||
|
||||
/* 1 — elasticlunr */
|
||||
try { importScripts('https://cdn.jsdelivr.net/npm/elasticlunr@0.9.5/elasticlunr.min.js'); }
|
||||
catch { importScripts(abs('/elasticlunr.min.js')); }
|
||||
|
||||
/* 2 — load a single index (remote → local) */
|
||||
async function loadIndex(remote, local, isCloud=false){
|
||||
let rawLoaded = false;
|
||||
try {
|
||||
await injectScript(localJs);
|
||||
|
||||
/* ───────────── PATCH ───────────── */
|
||||
requestIdleCallback(() => init(window.search));
|
||||
return;
|
||||
} catch (eLocal) {
|
||||
console.error("Local JS failed →", eLocal);
|
||||
const r = await fetch(remote,{mode:'cors'});
|
||||
if (!r.ok) throw new Error('HTTP '+r.status);
|
||||
importScripts(URL.createObjectURL(new Blob([await r.text()],{type:'application/javascript'})));
|
||||
rawLoaded = true;
|
||||
} catch(e){ console.warn('remote',remote,'failed →',e); }
|
||||
if(!rawLoaded){
|
||||
try { importScripts(abs(local)); rawLoaded = true; }
|
||||
catch(e){ console.error('local',local,'failed →',e); }
|
||||
}
|
||||
if(!rawLoaded) return null; /* give up on this index */
|
||||
const data = { json:self.search.index, urls:self.search.doc_urls, cloud:isCloud };
|
||||
delete self.search.index; delete self.search.doc_urls;
|
||||
return data;
|
||||
}
|
||||
|
||||
(async () => {
|
||||
const MAIN_RAW = 'https://raw.githubusercontent.com/HackTricks-wiki/hacktricks/refs/heads/master/searchindex.js';
|
||||
const CLOUD_RAW = 'https://raw.githubusercontent.com/HackTricks-wiki/hacktricks-cloud/refs/heads/master/searchindex.js';
|
||||
|
||||
const indices = [];
|
||||
const main = await loadIndex(MAIN_RAW , '/searchindex-book.js', false); if(main) indices.push(main);
|
||||
const cloud= await loadIndex(CLOUD_RAW, '/searchindex.js', true ); if(cloud) indices.push(cloud);
|
||||
|
||||
if(!indices.length){ postMessage({ready:false, error:'no-index'}); return; }
|
||||
|
||||
/* build index objects */
|
||||
const built = indices.map(d => ({
|
||||
idx : elasticlunr.Index.load(d.json),
|
||||
urls: d.urls,
|
||||
cloud: d.cloud,
|
||||
base: d.cloud ? 'https://cloud.hacktricks.wiki/' : ''
|
||||
}));
|
||||
|
||||
postMessage({ready:true});
|
||||
const MAX = 30, opts = {bool:'AND', expand:true};
|
||||
|
||||
self.onmessage = ({data:q}) => {
|
||||
if(!q){ postMessage([]); return; }
|
||||
|
||||
const all = [];
|
||||
for(const s of built){
|
||||
const res = s.idx.search(q,opts);
|
||||
if(!res.length) continue;
|
||||
const max = res[0].score || 1;
|
||||
res.forEach(r => {
|
||||
const doc = s.idx.documentStore.getDoc(r.ref);
|
||||
all.push({
|
||||
norm : r.score / max,
|
||||
title: doc.title,
|
||||
body : doc.body,
|
||||
breadcrumbs: doc.breadcrumbs,
|
||||
url : s.base + s.urls[r.ref],
|
||||
cloud: s.cloud
|
||||
});
|
||||
});
|
||||
}
|
||||
all.sort((a,b)=>b.norm-a.norm);
|
||||
postMessage(all.slice(0,MAX));
|
||||
};
|
||||
})();
|
||||
`;
|
||||
|
||||
/* ───────────── 2. spawn worker ───────────── */
|
||||
const worker = new Worker(URL.createObjectURL(new Blob([workerCode],{type:'application/javascript'})));
|
||||
|
||||
/* ───────────── 3. DOM refs ─────────────── */
|
||||
const wrap = document.getElementById('search-wrapper');
|
||||
const bar = document.getElementById('searchbar');
|
||||
const list = document.getElementById('searchresults');
|
||||
const listOut = document.getElementById('searchresults-outer');
|
||||
const header = document.getElementById('searchresults-header');
|
||||
const icon = document.getElementById('search-toggle');
|
||||
|
||||
const READY_ICON = icon.innerHTML;
|
||||
icon.textContent = '⏳';
|
||||
icon.setAttribute('aria-label','Loading search …');
|
||||
|
||||
const HOT=83, ESC=27, DOWN=40, UP=38, ENTER=13;
|
||||
let debounce, teaserCount=0;
|
||||
|
||||
/* ───────────── helpers (teaser, metric) ───────────── */
|
||||
const escapeHTML = (()=>{const M={'&':'&','<':'<','>':'>','"':'"','\'':'''};return s=>s.replace(/[&<>'"]/g,c=>M[c]);})();
|
||||
const URL_MARK='highlight';
|
||||
function metric(c,t){return c?`${c} search result${c>1?'s':''} for '${t}':`:`No search results for '${t}'.`;}
|
||||
|
||||
function makeTeaser(body,terms){
|
||||
const stem=w=>elasticlunr.stemmer(w.toLowerCase());
|
||||
const T=terms.map(stem),W_S=40,W_F=8,W_N=2,WIN=30;
|
||||
const W=[],sents=body.toLowerCase().split('. ');
|
||||
let i=0,v=W_F,found=false;
|
||||
sents.forEach(s=>{v=W_F; s.split(' ').forEach(w=>{ if(w){ if(T.some(t=>stem(w).startsWith(t))){v=W_S;found=true;} W.push([w,v,i]); v=W_N;} i+=w.length+1; }); i++;});
|
||||
if(!W.length) return body;
|
||||
const win=Math.min(W.length,WIN);
|
||||
const sums=[W.slice(0,win).reduce((a,[,wt])=>a+wt,0)];
|
||||
for(let k=1;k<=W.length-win;k++) sums[k]=sums[k-1]-W[k-1][1]+W[k+win-1][1];
|
||||
const best=found?sums.lastIndexOf(Math.max(...sums)):0;
|
||||
const out=[]; i=W[best][2];
|
||||
for(let k=best;k<best+win;k++){const [w,wt,pos]=W[k]; if(i<pos){out.push(body.substring(i,pos)); i=pos;} if(wt===W_S) out.push('<em>'); out.push(body.substr(pos,w.length)); if(wt===W_S) out.push('</em>'); i=pos+w.length;}
|
||||
return out.join('');
|
||||
}
|
||||
|
||||
function format(d,terms){
|
||||
const teaser=makeTeaser(escapeHTML(d.body),terms);
|
||||
teaserCount++;
|
||||
const enc=encodeURIComponent(terms.join(' ')).replace(/'/g,'%27');
|
||||
const parts=d.url.split('#'); if(parts.length===1) parts.push('');
|
||||
const abs=d.url.startsWith('http');
|
||||
const href=`${abs?'':path_to_root}${parts[0]}?${URL_MARK}=${enc}#${parts[1]}`;
|
||||
const style=d.cloud?" style=\"color:#1e88e5\"":"";
|
||||
const isCloud=d.cloud?" [Cloud]":" [Book]";
|
||||
return `<a href="${href}" aria-details="teaser_${teaserCount}"${style}>`+
|
||||
`${d.breadcrumbs}${isCloud}<span class="teaser" id="teaser_${teaserCount}" aria-label="Search Result Teaser">${teaser}</span></a>`;
|
||||
}
|
||||
|
||||
/* ───────────── UI control ───────────── */
|
||||
function showUI(s){wrap.classList.toggle('hidden',!s); icon.setAttribute('aria-expanded',s); if(s){window.scrollTo(0,0); bar.focus(); bar.select();} else {listOut.classList.add('hidden'); [...list.children].forEach(li=>li.classList.remove('focus'));}}
|
||||
function blur(){const t=document.createElement('input'); t.style.cssText='position:absolute;opacity:0;'; icon.appendChild(t); t.focus(); t.remove();}
|
||||
|
||||
icon.addEventListener('click',()=>showUI(wrap.classList.contains('hidden')));
|
||||
|
||||
document.addEventListener('keydown',e=>{
|
||||
if(e.altKey||e.ctrlKey||e.metaKey||e.shiftKey) return;
|
||||
const f=/^(?:input|select|textarea)$/i.test(e.target.nodeName);
|
||||
if(e.keyCode===HOT && !f){e.preventDefault(); showUI(true);} else if(e.keyCode===ESC){e.preventDefault(); showUI(false); blur();}
|
||||
else if(e.keyCode===DOWN && document.activeElement===bar){e.preventDefault(); const first=list.firstElementChild; if(first){blur(); first.classList.add('focus');}}
|
||||
else if([DOWN,UP,ENTER].includes(e.keyCode) && document.activeElement!==bar){const cur=list.querySelector('li.focus'); if(!cur) return; e.preventDefault(); if(e.keyCode===DOWN){const nxt=cur.nextElementSibling; if(nxt){cur.classList.remove('focus'); nxt.classList.add('focus');}} else if(e.keyCode===UP){const prv=cur.previousElementSibling; cur.classList.remove('focus'); if(prv){prv.classList.add('focus');} else {bar.focus();}} else {const a=cur.querySelector('a'); if(a) window.location.assign(a.href);}}
|
||||
});
|
||||
|
||||
bar.addEventListener('input',e=>{ clearTimeout(debounce); debounce=setTimeout(()=>worker.postMessage(e.target.value.trim()),120); });
|
||||
|
||||
/* ───────────── worker messages ───────────── */
|
||||
worker.onmessage = ({data}) => {
|
||||
if(data && data.ready!==undefined){
|
||||
if(data.ready){ icon.innerHTML=READY_ICON; icon.setAttribute('aria-label','Open search (S)'); }
|
||||
else { icon.textContent='❌'; icon.setAttribute('aria-label','Search unavailable'); }
|
||||
return;
|
||||
}
|
||||
const docs=data, q=bar.value.trim(), terms=q.split(/\s+/).filter(Boolean);
|
||||
header.textContent=metric(docs.length,q);
|
||||
clear(list);
|
||||
docs.forEach(d=>{const li=document.createElement('li'); li.innerHTML=format(d,terms); list.appendChild(li);});
|
||||
listOut.classList.toggle('hidden',!docs.length);
|
||||
};
|
||||
})();
|
||||
|
||||
// Exported functions
|
||||
search.hasFocus = hasFocus;
|
||||
})(window.search);
|
||||
Reference in New Issue
Block a user