mirror of
https://github.com/encode/django-rest-framework.git
synced 2024-11-24 02:24:03 +03:00
90 lines
3.3 KiB
ReStructuredText
90 lines
3.3 KiB
ReStructuredText
Code Highlighting API
|
|
=====================
|
|
|
|
This example demonstrates creating a REST API using a :class:`.Resource` with some form validation on the input.
|
|
We're going to provide a simple wrapper around the awesome `pygments <http://pygments.org/>`_ library, to create the Web API for a simple pastebin.
|
|
|
|
.. note::
|
|
|
|
A live sandbox instance of this API is available at http://rest.ep.io/pygments/
|
|
|
|
You can browse the API using a web browser, or from the command line::
|
|
|
|
curl -X GET http://rest.ep.io/pygments/ -H 'Accept: text/plain'
|
|
|
|
|
|
URL configuration
|
|
-----------------
|
|
|
|
We'll need two resources:
|
|
|
|
* A resource which represents the root of the API.
|
|
* A resource which represents an instance of a highlighted snippet.
|
|
|
|
``urls.py``
|
|
|
|
.. include:: ../../examples/pygments_api/urls.py
|
|
:literal:
|
|
|
|
Form validation
|
|
---------------
|
|
|
|
We'll now add a form to specify what input fields are required when creating a new highlighted code snippet. This will include:
|
|
|
|
* The code text itself.
|
|
* An optional title for the code.
|
|
* A flag to determine if line numbers should be included.
|
|
* Which programming language to interpret the code snippet as.
|
|
* Which output style to use for the highlighting.
|
|
|
|
``forms.py``
|
|
|
|
.. include:: ../../examples/pygments_api/forms.py
|
|
:literal:
|
|
|
|
Creating the resources
|
|
----------------------
|
|
|
|
We'll need to define 3 resource handling methods on our resources.
|
|
|
|
* ``PygmentsRoot.get()`` method, which lists all the existing snippets.
|
|
* ``PygmentsRoot.post()`` method, which creates new snippets.
|
|
* ``PygmentsInstance.get()`` method, which returns existing snippets.
|
|
|
|
And set a number of attributes on our resources.
|
|
|
|
* Set the ``allowed_methods`` and ``anon_allowed_methods`` attributes on both resources allowing for full unauthenticated access.
|
|
* Set the ``form`` attribute on the ``PygmentsRoot`` resource, to give us input validation when we create snippets.
|
|
* Set the ``emitters`` attribute on the ``PygmentsInstance`` resource, so that
|
|
|
|
``views.py``
|
|
|
|
.. include:: ../../examples/pygments_api/views.py
|
|
:literal:
|
|
|
|
Completed
|
|
---------
|
|
|
|
And we're done. We now have an API that is:
|
|
|
|
* **Browseable.** The API supports media types for both programmatic and human access, and can be accessed either via a browser or from the command line.
|
|
* **Self describing.** The API serves as it's own documentation.
|
|
* **Well connected.** The API can be accessed fully by traversal from the initial URL. Clients never need to construct URLs themselves.
|
|
|
|
Our API also supports multiple media types for both input and output, and applies sensible input validation in all cases.
|
|
|
|
For example if we make a POST request using form input:
|
|
|
|
.. code-block:: bash
|
|
|
|
bash: curl -X POST --data 'code=print "hello, world!"' --data 'style=foobar' -H 'X-Requested-With: XMLHttpRequest' http://rest.ep.io/pygments/
|
|
{"detail": {"style": ["Select a valid choice. foobar is not one of the available choices."], "lexer": ["This field is required."]}}
|
|
|
|
Or if we make the same request using JSON:
|
|
|
|
.. code-block:: bash
|
|
|
|
bash: curl -X POST --data-binary '{"code":"print \"hello, world!\"", "style":"foobar"}' -H 'Content-Type: application/json' -H 'X-Requested-With: XMLHttpRequest' http://rest.ep.io/pygments/
|
|
{"detail": {"style": ["Select a valid choice. foobar is not one of the available choices."], "lexer": ["This field is required."]}}
|
|
|