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# """
# ..
# >>> from djangorestframework.parsers import FormParser
# >>> from djangorestframework.compat import RequestFactory
# >>> from djangorestframework.views import View
# >>> from StringIO import StringIO
# >>> from urllib import urlencode
# >>> req = RequestFactory().get('/')
# >>> some_view = View()
# >>> some_view.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 :
#
# >>> (data, files) = FormParser(some_view).parse(StringIO(inpt))
# >>> data == {'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.
#
# >>> (data, files) = MyFormParser(some_view).parse(StringIO(inpt))
# >>> data == {'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.
#
# >>> (data, files) = MyFormParser(some_view).parse(StringIO(inpt))
# >>> data == {'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'
# ...
# >>> (data, files) = MyFormParser(some_view).parse(StringIO(inpt))
# >>> data == {'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.views import View
# 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)
# view = View()
# view.request = post_req
# (data, files) = MultiPartParser(view).parse(StringIO(self.body))
# self.assertEqual(data['key1'], 'val1')
# self.assertEqual(files['file1'].read(), 'blablabla')
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