forgejo-federation/docs/content/doc/features/webhooks.en-us.md
oliverpool b6e81357bd
Add Webhook authorization header (#20926)
_This is a different approach to #20267, I took the liberty of adapting
some parts, see below_

## Context

In some cases, a weebhook endpoint requires some kind of authentication.
The usual way is by sending a static `Authorization` header, with a
given token. For instance:

- Matrix expects a `Bearer <token>` (already implemented, by storing the
header cleartext in the metadata - which is buggy on retry #19872)
- TeamCity #18667
- Gitea instances #20267
- SourceHut https://man.sr.ht/graphql.md#authentication-strategies (this
is my actual personal need :)

## Proposed solution

Add a dedicated encrypt column to the webhook table (instead of storing
it as meta as proposed in #20267), so that it gets available for all
present and future hook types (especially the custom ones #19307).

This would also solve the buggy matrix retry #19872.

As a first step, I would recommend focusing on the backend logic and
improve the frontend at a later stage. For now the UI is a simple
`Authorization` field (which could be later customized with `Bearer` and
`Basic` switches):


![2022-08-23-142911](https://user-images.githubusercontent.com/3864879/186162483-5b721504-eef5-4932-812e-eb96a68494cc.png)

The header name is hard-coded, since I couldn't fine any usecase
justifying otherwise.

## Questions

- What do you think of this approach? @justusbunsi @Gusted @silverwind 
- ~~How are the migrations generated? Do I have to manually create a new
file, or is there a command for that?~~
- ~~I started adding it to the API: should I complete it or should I
drop it? (I don't know how much the API is actually used)~~

## Done as well:

- add a migration for the existing matrix webhooks and remove the
`Authorization` logic there


_Closes #19872_

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: Gusted <williamzijl7@hotmail.com>
Co-authored-by: delvh <dev.lh@web.de>
2022-11-03 20:23:20 +02:00

194 lines
5.2 KiB
Markdown

---
date: "2016-12-01T16:00:00+02:00"
title: "Webhooks"
slug: "webhooks"
weight: 10
toc: false
draft: false
menu:
sidebar:
parent: "features"
name: "Webhooks"
weight: 30
identifier: "webhooks"
---
# Webhooks
Gitea supports webhooks for repository events. This can be configured in the settings
page `/:username/:reponame/settings/hooks` by a repository admin. Webhooks can also be configured on a per-organization and whole system basis.
All event pushes are POST requests. The methods currently supported are:
- Gitea (can also be a GET request)
- Gogs
- Slack
- Discord
- Dingtalk
- Telegram
- Microsoft Teams
- Feishu
- Wechatwork
- Packagist
### Event information
**WARNING**: The `secret` field in the payload is deprecated as of Gitea 1.13.0 and will be removed in 1.14.0: https://github.com/go-gitea/gitea/issues/11755
The following is an example of event information that will be sent by Gitea to
a Payload URL:
```
X-GitHub-Delivery: f6266f16-1bf3-46a5-9ea4-602e06ead473
X-GitHub-Event: push
X-Gogs-Delivery: f6266f16-1bf3-46a5-9ea4-602e06ead473
X-Gogs-Event: push
X-Gitea-Delivery: f6266f16-1bf3-46a5-9ea4-602e06ead473
X-Gitea-Event: push
```
```json
{
"secret": "3gEsCfjlV2ugRwgpU#w1*WaW*wa4NXgGmpCfkbG3",
"ref": "refs/heads/develop",
"before": "28e1879d029cb852e4844d9c718537df08844e03",
"after": "bffeb74224043ba2feb48d137756c8a9331c449a",
"compare_url": "http://localhost:3000/gitea/webhooks/compare/28e1879d029cb852e4844d9c718537df08844e03...bffeb74224043ba2feb48d137756c8a9331c449a",
"commits": [
{
"id": "bffeb74224043ba2feb48d137756c8a9331c449a",
"message": "Webhooks Yay!",
"url": "http://localhost:3000/gitea/webhooks/commit/bffeb74224043ba2feb48d137756c8a9331c449a",
"author": {
"name": "Gitea",
"email": "someone@gitea.io",
"username": "gitea"
},
"committer": {
"name": "Gitea",
"email": "someone@gitea.io",
"username": "gitea"
},
"timestamp": "2017-03-13T13:52:11-04:00"
}
],
"repository": {
"id": 140,
"owner": {
"id": 1,
"login": "gitea",
"full_name": "Gitea",
"email": "someone@gitea.io",
"avatar_url": "https://localhost:3000/avatars/1",
"username": "gitea"
},
"name": "webhooks",
"full_name": "gitea/webhooks",
"description": "",
"private": false,
"fork": false,
"html_url": "http://localhost:3000/gitea/webhooks",
"ssh_url": "ssh://gitea@localhost:2222/gitea/webhooks.git",
"clone_url": "http://localhost:3000/gitea/webhooks.git",
"website": "",
"stars_count": 0,
"forks_count": 1,
"watchers_count": 1,
"open_issues_count": 7,
"default_branch": "master",
"created_at": "2017-02-26T04:29:06-05:00",
"updated_at": "2017-03-13T13:51:58-04:00"
},
"pusher": {
"id": 1,
"login": "gitea",
"full_name": "Gitea",
"email": "someone@gitea.io",
"avatar_url": "https://localhost:3000/avatars/1",
"username": "gitea"
},
"sender": {
"id": 1,
"login": "gitea",
"full_name": "Gitea",
"email": "someone@gitea.io",
"avatar_url": "https://localhost:3000/avatars/1",
"username": "gitea"
}
}
```
### Example
This is an example of how to use webhooks to run a php script upon push requests to the repository.
In your repository Settings, under Webhooks, Setup a Gitea webhook as follows:
- Target URL: http://mydomain.com/webhook.php
- HTTP Method: POST
- POST Content Type: application/json
- Secret: 123
- Trigger On: Push Events
- Active: Checked
Now on your server create the php file webhook.php
```
<?php
$secret_key = '123';
// check for POST request
if ($_SERVER['REQUEST_METHOD'] != 'POST') {
error_log('FAILED - not POST - '. $_SERVER['REQUEST_METHOD']);
exit();
}
// get content type
$content_type = isset($_SERVER['CONTENT_TYPE']) ? strtolower(trim($_SERVER['CONTENT_TYPE'])) : '';
if ($content_type != 'application/json') {
error_log('FAILED - not application/json - '. $content_type);
exit();
}
// get payload
$payload = trim(file_get_contents("php://input"));
if (empty($payload)) {
error_log('FAILED - no payload');
exit();
}
// get header signature
$header_signature = isset($_SERVER['HTTP_X_GITEA_SIGNATURE']) ? $_SERVER['HTTP_X_GITEA_SIGNATURE'] : '';
if (empty($header_signature)) {
error_log('FAILED - header signature missing');
exit();
}
// calculate payload signature
$payload_signature = hash_hmac('sha256', $payload, $secret_key, false);
// check payload signature against header signature
if ($header_signature !== $payload_signature) {
error_log('FAILED - payload signature');
exit();
}
// convert json to array
$decoded = json_decode($payload, true);
// check for json decode errors
if (json_last_error() !== JSON_ERROR_NONE) {
error_log('FAILED - json decode - '. json_last_error());
exit();
}
// success, do something
```
There is a Test Delivery button in the webhook settings that allows to test the configuration as well as a list of the most Recent Deliveries.
### Authorization header
**With 1.19**, Gitea hooks can be configured to send an [authorization header](https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Authorization) to the webhook target.