gitlab-org--gitlab-foss/doc/api
Dmitriy Zaporozhets 9d48bace9b Merge branch 'patch-6' into 'master'
Fixed Session Cookie header

## What does this MR do?

This MR fixes the wiki text header for the Session Cookie section

## Are there points in the code the reviewer needs to double check?

It is markdown so probably not. Two very simple changes - first is replacing a dot with a space (was causing invalid markdown, not rendered as a header) and capitalized the word Cookie to match the other header formatting.

## Why was this MR needed?

Fix the wiki documentation.

## Screenshots (if relevant)

None.

## Does this MR meet the acceptance criteria?

I can't imagine it wouldn't.

- [x] [CHANGELOG](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CHANGELOG) entry added
- [x] [Documentation created/updated](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/development/doc_styleguide.md)
- [x] API support added
- Tests
  - [x] Added for this feature/bug
  - [x] All builds are passing
- [x] Conform by the [merge request performance guides](http://docs.gitlab.com/ce/development/merge_request_performance_guidelines.html)
- [x] Conform by the [style guides](https://gitlab.com/gitlab-org/gitlab-ce/blob/master/CONTRIBUTING.md#style-guides)
- [x] Branch has no merge conflicts with `master` (if you do - rebase it please)
- [x] [Squashed related commits together](https://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits)

## What are the relevant issue numbers?

I didn't think this warranted an issue as it  is just some simple wiki markdown formatting with little to no consequence.

See merge request !6584
2016-09-30 13:52:24 +00:00
..
ci Fix a typo in documentation 2016-09-13 18:04:26 +02:00
access_requests.md Fix doc linting errors and remove useless API specs 2016-08-11 11:02:34 +02:00
award_emoji.md Fix tests for Snippets toggling awards 2016-09-19 19:53:09 +03:00
branches.md use long options for curl examples in API documentation (!5703) 2016-08-09 01:42:50 +02:00
broadcast_messages.md Add BroadcastMessage API documentation 2016-08-31 17:03:19 -03:00
build_triggers.md use long options for curl examples in API documentation (!5703) 2016-08-09 01:42:50 +02:00
build_variables.md use long options for curl examples in API documentation (!5703) 2016-08-09 01:42:50 +02:00
builds.md expose pipeline data in builds API 2016-09-28 23:58:16 -03:00
commits.md The ID of a project can be also a string 2016-08-31 17:40:54 +02:00
deploy_key_multiple_projects.md use long options for curl examples in API documentation (!5703) 2016-08-09 01:42:50 +02:00
deploy_keys.md use long options for curl examples in API documentation (!5703) 2016-08-09 01:42:50 +02:00
deployments.md Do not expose projects on deployments 2016-08-18 21:10:53 +02:00
enviroments.md use long options for curl examples in API documentation (!5703) 2016-08-09 01:42:50 +02:00
groups.md Allow to set request_access_enabled for groups and projects using API 2016-09-19 12:13:57 -03:00
issues.md API: Expose issue#confidential 2016-08-31 09:20:04 +02:00
keys.md Move get user by ID of an SSH key documentation to separate file 2015-09-03 16:32:26 +03:00
labels.md use long options for curl examples in API documentation (!5703) 2016-08-09 01:42:50 +02:00
licenses.md use long options for curl examples in API documentation (!5703) 2016-08-09 01:42:50 +02:00
members.md Issue #21440: Fix to curl example for adding member to project 2016-09-06 21:34:33 +01:00
merge_requests.md entities: expose {,merge_commit_}sha in MergeRequest 2016-08-31 10:50:54 -04:00
milestones.md use long options for curl examples in API documentation (!5703) 2016-08-09 01:42:50 +02:00
namespaces.md use long options for curl examples in API documentation (!5703) 2016-08-09 01:42:50 +02:00
notes.md Fix API notes endpoint when posting only emoji 2016-09-16 16:28:53 +02:00
notification_settings.md Add notification_settings API calls 2016-09-09 17:08:06 +00:00
oauth2.md Merge branch 'master' into 'fix_oauth_doc' 2016-09-30 12:58:41 +00:00
pipelines.md Add docs on API for pipelines, plus minor fixes 2016-08-18 16:56:39 +02:00
project_snippets.md api: expose web_url for project entities 2016-08-24 10:32:31 -04:00
projects.md Expose project share expiration_date field on API 2016-09-28 10:12:49 -03:00
README.md Fixed Session Cookie header 2016-09-29 05:07:17 +00:00
repositories.md Move git tags API to separate file 2015-11-12 15:41:13 +01:00
repository_files.md Add optional 'author' param when making commits 2016-09-19 10:00:26 -07:00
runners.md use long options for curl examples in API documentation (!5703) 2016-08-09 01:42:50 +02:00
services.md Ability to specify branches for pivotal tracker integration 2016-08-15 11:01:41 +03:00
session.md Added documentation and CHANGELOG item 2016-08-18 16:47:26 -05:00
settings.md Expose the Koding application settings in the API 2016-09-29 09:12:52 -07:00
sidekiq_metrics.md use long options for curl examples in API documentation (!5703) 2016-08-09 01:42:50 +02:00
system_hooks.md use long options for curl examples in API documentation (!5703) 2016-08-09 01:42:50 +02:00
tags.md use long options for curl examples in API documentation (!5703) 2016-08-09 01:42:50 +02:00
todos.md use long options for curl examples in API documentation (!5703) 2016-08-09 01:42:50 +02:00
users.md Add User#organization to users api 2016-09-27 14:04:39 +03:00

GitLab API

Automate GitLab 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:

Internal CI API

The following documentation is for the internal CI API:

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 --header "Authorization: Bearer OAUTH-TOKEN" https://gitlab.example.com/api/v3/projects

Read more about GitLab as an OAuth2 client.

Personal Access Tokens

Introduced in GitLab 8.8.

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

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

When signing in to GitLab 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://gitlab.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://gitlab.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.

Request type Description
GET Access one or more resources and return the result as JSON.
POST Return 201 Created if the resource is successfully created and return the newly created resource as JSON.
GET / PUT / DELETE Return 200 OK if the resource is accessed, modified or deleted successfully. The (modified) result is returned as JSON.
DELETE Designed to be idempotent, meaning a request to a resource still returns 200 OK even it was deleted before or is not available. The reasoning behind this, is that the user is not really interested if the resource existed before or not.

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

Return values Description
200 OK The GET, PUT or DELETE request was successful, the resource(s) itself is returned as JSON.
201 Created The POST request was successful and the resource is returned as JSON.
304 Not Modified Indicates that the resource has not been modified since the last request.
400 Bad Request A required attribute of the API request is missing, e.g., the title of an issue is not given.
401 Unauthorized The user is not authenticated, a valid user token is necessary.
403 Forbidden The request is not allowed, e.g., the user is not allowed to delete a project.
404 Not Found A resource could not be accessed, e.g., an ID for a resource could not be found.
405 Method Not Allowed The request is not supported.
409 Conflict A conflicting resource already exists, e.g., creating a project with a name that already exists.
422 Unprocessable The entity could not be processed.
500 Server Error While handling the request something went wrong server-side.

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://gitlab.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://gitlab.example.com/api/v3/projects"

Pagination

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

Parameter Description
page Page number (default: 1)
per_page Number of items to list per page (default: 20, max: 100)

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

curl --request PUT --header "PRIVATE-TOKEN: 9koXpg98eAheJpvBs5tK" "https://gitlab.example.com/api/v3/namespaces?per_page=50

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 --head --header "PRIVATE-TOKEN: 9koXpg98eAheJpvBs5tK" https://gitlab.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://gitlab.example.com/api/v3/projects/8/issues/8/notes?page=1&per_page=3>; rel="prev", <https://gitlab.example.com/api/v3/projects/8/issues/8/notes?page=3&per_page=3>; rel="next", <https://gitlab.example.com/api/v3/projects/8/issues/8/notes?page=1&per_page=3>; rel="first", <https://gitlab.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.

Header Description
X-Total The total number of items
X-Total-Pages The total number of pages
X-Per-Page The number of items per page
X-Page The index of the current page (starting at 1)
X-Next-Page The index of the next page
X-Prev-Page The index of the previous page

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.

Parameter Description
id Is unique across all issues and is used for any API call
iid Is unique only in scope of a single project. When you browse issues or merge requests with the Web UI, you see the iid

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 GitLab API Clients for most of the popular programming languages. Visit the GitLab website for a complete list.