GitSwarm 2016.3-2 Documentation

GitSwarm API

Automate GitSwarm via a simple and powerful API. All definitions can be found under /lib/api.

Resources

Documentation for various API resources can be found separately in the following locations:

• Award Emoji
• Branches
• Builds
• Build triggers
• Build Variables
• Commits
• Deploy Keys
• Groups
• Issues
• Keys
• Labels
• Merge Requests
• Milestones
• Open source license templates
• Namespaces
• Notes (comments)
• Projects including setting Webhooks
• Project Snippets
• Repositories
• Repository Files
• Runners
• Services
• Session
• Settings
• Sidekiq metrics
• System Hooks
• Tags
• Users
• Todos

Internal CI API

The following documentation is for the internal CI API:

• Builds
• Runners

Authentication

All API requests require authentication via a session cookie or token. There are three types of tokens available: private tokens, OAuth 2 tokens, and personal access tokens.

If authentication information is invalid or omitted, an error message will be returned with status code 401:

{
  "message": "401 Unauthorized"
}

Private Tokens

You need to pass a private_token parameter via query string or header. If passed as a header, the header name must be PRIVATE-TOKEN (uppercase and with a dash instead of an underscore). You can find or reset your private token in your account page (/profile/account).

OAuth 2 Tokens

You can use an OAuth 2 token to authenticate with the API by passing it either in the access_token parameter or in the Authorization header.

Example of using the OAuth2 token in the header:

curl -H "Authorization: Bearer OAUTH-TOKEN" https://gitswarm.example.com/api/v3/projects

Read more about GitSwarm as an OAuth2 client.

Personal Access Tokens

Note: This feature was introduced in GitSwarm 2016.2

You can create as many personal access tokens as you like from your GitSwarm profile (/profile/personal_access_tokens); perhaps one for each application that needs access to the GitSwarm API.

Once you have your token, pass it to the API using either the private_token parameter or the PRIVATE-TOKEN header.

 Session cookie

When signing in to GitSwarm as an ordinary user, a _gitlab_session cookie is set. The API will use this cookie for authentication if it is present, but using the API to generate a new session cookie is currently not supported.

Basic Usage

API requests should be prefixed with api and the API version. The API version is defined in lib/api.rb.

Example of a valid API request:

GET https://gitswarm.example.com/api/v3/projects?private_token=9koXpg98eAheJpvBs5tK

Example of a valid API request using cURL and authentication via header:

curl --header "PRIVATE-TOKEN: 9koXpg98eAheJpvBs5tK" "https://gitswarm.example.com/api/v3/projects"

The API uses JSON to serialize data. You don't need to specify .json at the end of an API URL.

Status codes

The API is designed to return different status codes according to context and action. This way, if a request results in an error, the caller is able to get insight into what went wrong.

The following table gives an overview of how the API functions generally behave.

The following table shows the possible return codes for API requests.

Sudo

All API requests support performing an API call as if you were another user, provided your private token is from an administrator account. You need to pass the sudo parameter either via query string or a header with an ID/username of the user you want to perform the operation as. If passed as a header, the header name must be SUDO (uppercase).

If a non administrative private_token is provided, then an error message will be returned with status code 403:

{
  "message": "403 Forbidden: Must be admin to use sudo"
}

If the sudo user ID or username cannot be found, an error message will be returned with status code 404:

{
  "message": "404 Not Found: No user id or username for: <id/username>"
}

Example of a valid API call and a request using cURL with sudo request, providing a username:

GET /projects?private_token=9koXpg98eAheJpvBs5tK&sudo=username

curl --header "PRIVATE-TOKEN: 9koXpg98eAheJpvBs5tK" --header "SUDO: username" "https://gitswarm.example.com/api/v3/projects"

Example of a valid API call and a request using cURL with sudo request, providing an ID:

GET /projects?private_token=9koXpg98eAheJpvBs5tK&sudo=23

curl --header "PRIVATE-TOKEN: 9koXpg98eAheJpvBs5tK" --header "SUDO: 23" "https://gitswarm.example.com/api/v3/projects"

Pagination

Sometimes the returned result will span across many pages. When listing resources you can pass the following parameters:

In the example below, we list 50 namespaces per page.

curl -X PUT -H "PRIVATE-TOKEN: 9koXpg98eAheJpvBs5tK" "https://gitswarm.example.com/api/v3/namespaces?per_page=50

Pagination Link header

Link headers are sent back with each response. They have rel set to prev/next/first/last and contain the relevant URL. Please use these links instead of generating your own URLs.

In the cURL example below, we limit the output to 3 items per page (per_page=3) and we request the second page (page=2) of comments of the issue with ID 8 which belongs to the project with ID 8:

curl -I -H "PRIVATE-TOKEN: 9koXpg98eAheJpvBs5tK" https://gitswarm.example.com/api/v3/projects/8/issues/8/notes?per_page=3&page=2

The response will then be:

HTTP/1.1 200 OK
Cache-Control: no-cache
Content-Length: 1103
Content-Type: application/json
Date: Mon, 18 Jan 2016 09:43:18 GMT
Link: <https://gitswarm.example.com/api/v3/projects/8/issues/8/notes?page=1&per_page=3>; rel="prev", <https://gitswarm.example.com/api/v3/projects/8/issues/8/notes?page=3&per_page=3>; rel="next", <https://gitswarm.example.com/api/v3/projects/8/issues/8/notes?page=1&per_page=3>; rel="first", <https://gitswarm.example.com/api/v3/projects/8/issues/8/notes?page=3&per_page=3>; rel="last"
Status: 200 OK
Vary: Origin
X-Next-Page: 3
X-Page: 2
X-Per-Page: 3
X-Prev-Page: 1
X-Request-Id: 732ad4ee-9870-4866-a199-a9db0cde3c86
X-Runtime: 0.108688
X-Total: 8
X-Total-Pages: 3

Other pagination headers

Additional pagination headers are also sent back.

id vs iid

When you work with the API, you may notice two similar fields in API entities: id and iid. The main difference between them is scope.

For example, an issue might have id: 46 and iid: 5.

That means that if you want to get an issue via the API you should use the id:

GET /projects/42/issues/:id

On the other hand, if you want to create a link to a web page you should use the iid:

GET /projects/42/issues/:iid

Data validation and error reporting

When working with the API you may encounter validation errors, in which case the API will answer with an HTTP 400 status.

Such errors appear in two cases:

• A required attribute of the API request is missing, e.g., the title of an issue is not given
• An attribute did not pass the validation, e.g., user bio is too long

When an attribute is missing, you will get something like:

HTTP/1.1 400 Bad Request
Content-Type: application/json
{
    "message":"400 (Bad request) \"title\" not given"
}

When a validation error occurs, error messages will be different. They will hold all details of validation errors:

HTTP/1.1 400 Bad Request
Content-Type: application/json
{
    "message": {
        "bio": [
            "is too long (maximum is 255 characters)"
        ]
    }
}

This makes error messages more machine-readable. The format can be described as follows:

{
    "message": {
        "<property-name>": [
            "<error-message>",
            "<error-message>",
            ...
        ],
        "<embed-entity>": {
            "<property-name>": [
                "<error-message>",
                "<error-message>",
                ...
            ],
        }
    }
}

Clients

There are many unofficial GitSwarm API Clients for most of the popular programming languages. Visit the GitSwarm website for a complete list.