:title: docker.io OAuth API
:description: API Documentation for docker.io's OAuth flow.
:keywords: API, Docker, oauth, REST, documentation


===================
docker.io OAuth API
===================

.. contents:: Table of Contents


1. Brief introduction
=====================

Some docker.io API requests will require an access token to authenticate. To
get an access token for a user, that user must first grant your application
access to their docker.io account. In order for them to grant your application
access you must first register your application.

Before continuing, we encourage you to familiarize yourself with
`The OAuth 2.0 Authorization Framework <http://tools.ietf.org/html/rfc6749>`_.

*Also note that all OAuth interactions must take place over https connections*


2. Register Your Application
============================

You will need to register your application with docker.io before users will
be able to grant your application access to their account information. We
are currently only allowing applications selectively. To request registration
of your application send an email to support-accounts@docker.com with the
following information:

- The name of your application
- A description of your application and the service it will provide
  to docker.io users.
- A callback URI that we will use for redirecting authorization requests to
  your application. These are used in the step of getting an Authorization
  Code. The domain name of the callback URI will be visible to the user when
  they are requested to authorize your application.

When your application is approved you will receive a response from the
docker.io team with your ``client_id`` and ``client_secret`` which your
application will use in the steps of getting an Authorization Code and getting
an Access Token.


3. Endpoints
============

3.1 Get an Authorization Code
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Once You have registered you are ready to start integrating docker.io accounts
into your application! The process is usually started by a user following a
link in your application to an OAuth Authorization endpoint.

.. http:get:: /api/v1.1/o/authorize/

    Request that a docker.io user authorize your application. If the user is
    not already logged in, they will be prompted to login. The user is then
    presented with a form to authorize your application for the requested
    access scope. On submission, the user will be redirected to the specified
    ``redirect_uri`` with an Authorization Code.

    :query client_id: The ``client_id`` given to your application at
        registration.
    :query response_type: MUST be set to ``code``. This specifies that you
        would like an Authorization Code returned.
    :query redirect_uri: The URI to redirect back to after the user has
        authorized your application. If omitted, the first of your registered
        ``response_uris`` is used. If included, it must be one of the URIs
        which were submitted when registering your application.
    :query scope: The extent of access permissions you are requesting.
        Currently, the scope options are ``profile_read``, ``profile_write``,
        ``email_read``, and ``email_write``. Scopes must be separated by a
        space. If omitted, the default scopes ``profile_read email_read`` are
        used.
    :query state: (Recommended) Used by your application to maintain state
        between the authorization request and callback to protect against CSRF
        attacks.

    **Example Request**

    Asking the user for authorization.

    .. sourcecode:: http

        GET /api/v1.1/o/authorize/?client_id=TestClientID&response_type=code&redirect_uri=https%3A//my.app/auth_complete/&scope=profile_read%20email_read&state=abc123 HTTP/1.1
        Host: www.docker.io

    **Authorization Page**

    When the user follows a link, making the above GET request, they will be
    asked to login to their docker.io account if they are not already and then
    be presented with the following authorization prompt which asks the user
    to authorize your application with a description of the requested scopes.

    .. image:: _static/io_oauth_authorization_page.png

    Once the user allows or denies your Authorization Request the user will be
    redirected back to your application. Included in that request will be the
    following query parameters:

    ``code``
      The Authorization code generated by the docker.io authorization server.
      Present it again to request an Access Token. This code expires in 60
      seconds.

    ``state``
      If the ``state`` parameter was present in the authorization request this
      will be the exact value received from that request.

    ``error``
      An error message in the event of the user denying the authorization or
      some other kind of error with the request.


3.2 Get an Access Token
^^^^^^^^^^^^^^^^^^^^^^^

Once the user has authorized your application, a request will be made to your
application's specified ``redirect_uri`` which includes a ``code`` parameter
that you must then use to get an Access Token.

.. http:post:: /api/v1.1/o/token/

    Submit your newly granted Authorization Code and your application's
    credentials to receive an Access Token and Refresh Token. The code is valid
    for 60 seconds and cannot be used more than once.

    :reqheader Authorization: HTTP basic authentication using your
        application's ``client_id`` and ``client_secret``

    :form grant_type: MUST be set to ``authorization_code``
    :form code: The authorization code received from the user's redirect
        request.
    :form redirect_uri: The same ``redirect_uri`` used in the authentication
        request.

    **Example Request**

    Using an authorization code to get an access token.

    .. sourcecode:: http

        POST /api/v1.1/o/token/ HTTP/1.1
        Host: www.docker.io
        Authorization: Basic VGVzdENsaWVudElEOlRlc3RDbGllbnRTZWNyZXQ=
        Accept: application/json
        Content-Type: application/json

        {
            "grant_type": "code",
            "code": "YXV0aG9yaXphdGlvbl9jb2Rl",
            "redirect_uri": "https://my.app/auth_complete/"
        }

    **Example Response**

    .. sourcecode:: http

        HTTP/1.1 200 OK
        Content-Type: application/json;charset=UTF-8

        {
            "username": "janedoe",
            "user_id": 42,
            "access_token": "t6k2BqgRw59hphQBsbBoPPWLqu6FmS",
            "expires_in": 15552000,
            "token_type": "Bearer",
            "scope": "profile_read email_read",
            "refresh_token": "hJDhLH3cfsUrQlT4MxA6s8xAFEqdgc"
        }

    In the case of an error, there will be a non-200 HTTP Status and and data
    detailing the error.


3.3 Refresh a Token
^^^^^^^^^^^^^^^^^^^

Once the Access Token expires you can use your ``refresh_token`` to have
docker.io issue your application a new Access Token, if the user has not
revoked access from your application.

.. http:post:: /api/v1.1/o/token/

    Submit your ``refresh_token`` and application's credentials to receive a
    new Access Token and Refresh Token. The ``refresh_token`` can be used
    only once.

    :reqheader Authorization: HTTP basic authentication using your
        application's ``client_id`` and ``client_secret``

    :form grant_type: MUST be set to ``refresh_token``
    :form refresh_token: The ``refresh_token`` which was issued to your
        application.
    :form scope: (optional) The scope of the access token to be returned.
        Must not include any scope not originally granted by the user and if
        omitted is treated as equal to the scope originally granted.

    **Example Request**

    Refreshing an access token.

    .. sourcecode:: http

        POST /api/v1.1/o/token/ HTTP/1.1
        Host: www.docker.io
        Authorization: Basic VGVzdENsaWVudElEOlRlc3RDbGllbnRTZWNyZXQ=
        Accept: application/json
        Content-Type: application/json

        {
            "grant_type": "refresh_token",
            "refresh_token": "hJDhLH3cfsUrQlT4MxA6s8xAFEqdgc",
        }

    **Example Response**

    .. sourcecode:: http

        HTTP/1.1 200 OK
        Content-Type: application/json;charset=UTF-8

        {
            "username": "janedoe",
            "user_id": 42,
            "access_token": "t6k2BqgRw59hphQBsbBoPPWLqu6FmS",
            "expires_in": 15552000,
            "token_type": "Bearer",
            "scope": "profile_read email_read",
            "refresh_token": "hJDhLH3cfsUrQlT4MxA6s8xAFEqdgc"
        }

    In the case of an error, there will be a non-200 HTTP Status and and data
    detailing the error.


4. Use an Access Token with the API
===================================

Many of the docker.io API requests will require a Authorization request header
field. Simply ensure you add this header with "Bearer <``access_token``>":

.. sourcecode:: http

    GET /api/v1.1/resource HTTP/1.1
    Host: docker.io
    Authorization: Bearer 2YotnFZFEjr1zCsicMWpAA
