# DO - Functions
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## Basic Information
DigitalOcean Functions, also known as "DO Functions," is a serverless computing platform that lets you **run code without having to worry about the underlying infrastructure**. With DO Functions, you can write and deploy your code as "functions" that can be **triggered** via **API**, **HTTP requests** (if enabled) or **cron**. These functions are executed in a fully managed environment, so you **don't need to worry** about scaling, security, or maintenance.
In DO, to create a function first you need to **create a namespace** which will be **grouping functions**.\
Inside the namespace you can then create a function.
### Triggers
The way **to trigger a function via REST API** (always enabled, it's the method the cli uses) is by triggering a request with an **authentication token** like:
```bash
curl -X POST "https://faas-lon1-129376a7.doserverless.co/api/v1/namespaces/fn-c100c012-65bf-4040-1230-2183764b7c23/actions/functionname?blocking=true&result=true" \
-H "Content-Type: application/json" \
-H "Authorization: Basic MGU0NTczZGQtNjNiYS00MjZlLWI2YjctODk0N2MyYTA2NGQ4OkhwVEllQ2t4djNZN2x6YjJiRmFGc1FERXBySVlWa1lEbUxtRE1aRTludXA1UUNlU2VpV0ZGNjNqWnVhYVdrTFg="
```
To see how is the **`doctl`** cli tool getting this token (so you can replicate it), the **following command shows the complete network trace:**
```bash
doctl serverless connect --trace
```
**When HTTP trigger is enabled**, a web function can be invoked through these **HTTP methods GET, POST, PUT, PATCH, DELETE, HEAD and OPTIONS**.
{% hint style="danger" %}
In DO functions, **environment variables cannot be encrypted** (at the time of this writing).\
I couldn't find any way to read them from the CLI but from the console it's straight forward.
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**Functions URLs** look like this: `https://.doserverless.co/api/v1/web//default/`
### Enumeration
```bash
# Namespace
doctl serverless namespaces list
# Functions (need to connect to a namespace)
doctl serverless connect
doctl serverless functions list
doctl serverless functions invoke
doctl serverless functions get
# Logs of executions
doctl serverless activations list
doctl serverless activations get # Get all the info about execution
doctl serverless activations logs # get only the logs of execution
doctl serverless activations result # get only the response result of execution
# I couldn't find any way to get the env variables form the CLI
```
{% hint style="danger" %}
There **isn't metadata endpoint** from the Functions sandbox.
{% endhint %}
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