mirror of
https://github.com/encode/django-rest-framework.git
synced 2024-09-22 11:59:04 +03:00
131 lines
4.9 KiB
Python
131 lines
4.9 KiB
Python
"""
|
|
..
|
|
>>> from djangorestframework.parsers import FormParser
|
|
>>> from djangorestframework.compat import RequestFactory
|
|
>>> from djangorestframework.resource import Resource
|
|
>>> from StringIO import StringIO
|
|
>>> from urllib import urlencode
|
|
>>> req = RequestFactory().get('/')
|
|
>>> some_resource = Resource()
|
|
>>> some_resource.request = req # Make as if this request had been dispatched
|
|
|
|
FormParser
|
|
============
|
|
|
|
Data flatening
|
|
----------------
|
|
|
|
Here is some example data, which would eventually be sent along with a post request :
|
|
|
|
>>> inpt = urlencode([
|
|
... ('key1', 'bla1'),
|
|
... ('key2', 'blo1'), ('key2', 'blo2'),
|
|
... ])
|
|
|
|
Default behaviour for :class:`parsers.FormParser`, is to return a single value for each parameter :
|
|
|
|
>>> FormParser(some_resource).parse(StringIO(inpt)) == {'key1': 'bla1', 'key2': 'blo1'}
|
|
True
|
|
|
|
However, you can customize this behaviour by subclassing :class:`parsers.FormParser`, and overriding :meth:`parsers.FormParser.is_a_list` :
|
|
|
|
>>> class MyFormParser(FormParser):
|
|
...
|
|
... def is_a_list(self, key, val_list):
|
|
... return len(val_list) > 1
|
|
|
|
This new parser only flattens the lists of parameters that contain a single value.
|
|
|
|
>>> MyFormParser(some_resource).parse(StringIO(inpt)) == {'key1': 'bla1', 'key2': ['blo1', 'blo2']}
|
|
True
|
|
|
|
.. note:: The same functionality is available for :class:`parsers.MultipartParser`.
|
|
|
|
Submitting an empty list
|
|
--------------------------
|
|
|
|
When submitting an empty select multiple, like this one ::
|
|
|
|
<select multiple="multiple" name="key2"></select>
|
|
|
|
The browsers usually strip the parameter completely. A hack to avoid this, and therefore being able to submit an empty select multiple, is to submit a value that tells the server that the list is empty ::
|
|
|
|
<select multiple="multiple" name="key2"><option value="_empty"></select>
|
|
|
|
:class:`parsers.FormParser` provides the server-side implementation for this hack. Considering the following posted data :
|
|
|
|
>>> inpt = urlencode([
|
|
... ('key1', 'blo1'), ('key1', '_empty'),
|
|
... ('key2', '_empty'),
|
|
... ])
|
|
|
|
:class:`parsers.FormParser` strips the values ``_empty`` from all the lists.
|
|
|
|
>>> MyFormParser(some_resource).parse(StringIO(inpt)) == {'key1': 'blo1'}
|
|
True
|
|
|
|
Oh ... but wait a second, the parameter ``key2`` isn't even supposed to be a list, so the parser just stripped it.
|
|
|
|
>>> class MyFormParser(FormParser):
|
|
...
|
|
... def is_a_list(self, key, val_list):
|
|
... return key == 'key2'
|
|
...
|
|
>>> MyFormParser(some_resource).parse(StringIO(inpt)) == {'key1': 'blo1', 'key2': []}
|
|
True
|
|
|
|
Better like that. Note that you can configure something else than ``_empty`` for the empty value by setting :attr:`parsers.FormParser.EMPTY_VALUE`.
|
|
"""
|
|
import httplib, mimetypes
|
|
from tempfile import TemporaryFile
|
|
from django.test import TestCase
|
|
from djangorestframework.compat import RequestFactory
|
|
from djangorestframework.parsers import MultipartParser
|
|
from djangorestframework.resource import Resource
|
|
from djangorestframework.utils.mediatypes import MediaType
|
|
from StringIO import StringIO
|
|
|
|
def encode_multipart_formdata(fields, files):
|
|
"""For testing multipart parser.
|
|
fields is a sequence of (name, value) elements for regular form fields.
|
|
files is a sequence of (name, filename, value) elements for data to be uploaded as files
|
|
Return (content_type, body)."""
|
|
BOUNDARY = '----------ThIs_Is_tHe_bouNdaRY_$'
|
|
CRLF = '\r\n'
|
|
L = []
|
|
for (key, value) in fields:
|
|
L.append('--' + BOUNDARY)
|
|
L.append('Content-Disposition: form-data; name="%s"' % key)
|
|
L.append('')
|
|
L.append(value)
|
|
for (key, filename, value) in files:
|
|
L.append('--' + BOUNDARY)
|
|
L.append('Content-Disposition: form-data; name="%s"; filename="%s"' % (key, filename))
|
|
L.append('Content-Type: %s' % get_content_type(filename))
|
|
L.append('')
|
|
L.append(value)
|
|
L.append('--' + BOUNDARY + '--')
|
|
L.append('')
|
|
body = CRLF.join(L)
|
|
content_type = 'multipart/form-data; boundary=%s' % BOUNDARY
|
|
return content_type, body
|
|
|
|
def get_content_type(filename):
|
|
return mimetypes.guess_type(filename)[0] or 'application/octet-stream'
|
|
|
|
class TestMultipartParser(TestCase):
|
|
def setUp(self):
|
|
self.req = RequestFactory()
|
|
self.content_type, self.body = encode_multipart_formdata([('key1', 'val1'), ('key1', 'val2')],
|
|
[('file1', 'pic.jpg', 'blablabla'), ('file1', 't.txt', 'blobloblo')])
|
|
|
|
def test_multipartparser(self):
|
|
"""Ensure that MultipartParser can parse multipart/form-data that contains a mix of several files and parameters."""
|
|
post_req = RequestFactory().post('/', self.body, content_type=self.content_type)
|
|
resource = Resource()
|
|
resource.request = post_req
|
|
parsed = MultipartParser(resource).parse(StringIO(self.body))
|
|
self.assertEqual(parsed['key1'], 'val1')
|
|
self.assertEqual(parsed.FILES['file1'].read(), 'blablabla')
|
|
|