graphql-engine/docs/graphql/core/api-reference/restified.rst
Lyndon Maydwell 0767333597 server: support restified versions of graphql queries (#303)
Restified GraphQL Endpoints feature.

GitOrigin-RevId: 3d6e589426ec21a60a915b47f579f0ac4934af45
2021-01-29 01:03:35 +00:00

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.. meta::
:description: Hasura RESTified GraphQL API reference
:keywords: hasura, docs, REST API, API reference
.. _restified_api_reference:
RESTified GraphQL Endpoints API Reference
=========================================
.. contents:: Table of contents
:backlinks: none
:depth: 1
:local:
Introduction
------------
The RESTified GraphQL API allows for the use of a REST interface to saved GraphQL queries and mutations.
Users specify the query or mutation they wish to make available, as well a URL template.
Segments of the URL template can potentially capture data to be used as GraphQL variables.
See :ref:`api_restified_endpoints` for information on how to work with endpoints through the metadata apis.
Endpoint
--------
Requests are made to ``/api/rest/**`` endpoints.
By default these are:
* ``GET``, ``POST`` requests for queries, and
* ``POST`` requests for mutations
Although not in the REST spirit, ``POST`` requests are allowed by default for
non-mutation queries since some HTTP clients may not be able to supply a JSON
body for GET requests.
If required, users may explicitly configure the HTTP methods allowed per endpoint.
API Spec
--------
Request
^^^^^^^
Endpoints are determined by the URL templates:
* Simple URLs such as /s1/s2/s3 match literally.
* Segments starting with a ``:`` treat these parts of the path like wildcards and use the name to assign a variable. For example: ``/s1/:id/s3``.
The request expects a normal REST style request to the endpoint.
Variables can be supplied via route patterns, url query variables, and request body JSON object keys.
* Route variables and Query parameters are interpreted as scalars according to the variables types in the associated query.
* JSON Body Object values are passed directly to the associated query with no additional validation or type-coersion.
When making a request to this API only one endpoint should match. If multiple endpoints match your request this is considered an error and will report so via a 500 status code. If endpoints exist with your path, but none matching your HTTP method then a 405 error will be returned
listing the methods that you can use.
Sample requests
***************
.. code-block:: http
GET /api/rest/simple_query/1 HTTP/1.1
.. code-block:: http
POST /api/rest/complicated_mutation/2?time=now HTTP/1.1
Content-Type: application/json
{
"user": {"name": "Simon"}
}
Response
^^^^^^^^
The response is determined by the saved query. The response will be the same as if you had made the query directly in the GraphQL console.
See the :ref:`api_reference_graphql` for more details.