Fixed #13721 -- Added UploadedFile.content_type_extra.

Thanks Waldemar Kornewald and mvschaik for work on the patch.

tests/file_uploads/tests.py

@@ -187,6 +187,27 @@ class FileUploadTests(TestCase):
         got = json.loads(self.client.request(**r).content.decode('utf-8'))
         self.assertTrue(len(got['file']) < 256, "Got a long file name (%s characters)." % len(got['file']))
 
+    def test_content_type_extra(self):
+        """Uploaded files may have content type parameters available."""
+        tdir = tempfile.gettempdir()
+
+        no_content_type = tempfile.NamedTemporaryFile(suffix=".ctype_extra", dir=tdir)
+        no_content_type.write(b'something')
+        no_content_type.seek(0)
+
+        simple_file = tempfile.NamedTemporaryFile(suffix=".ctype_extra", dir=tdir)
+        simple_file.write(b'something')
+        simple_file.seek(0)
+        simple_file.content_type = 'text/plain; test-key=test_value'
+
+        response = self.client.post('/file_uploads/echo_content_type_extra/', {
+            'no_content_type': no_content_type,
+            'simple_file': simple_file,
+        })
+        received = json.loads(response.content.decode('utf-8'))
+        self.assertEqual(received['no_content_type'], {})
+        self.assertEqual(received['simple_file'], {'test-key': 'test_value'})
+
     def test_truncated_multipart_handled_gracefully(self):
         """
         If passed an incomplete multipart message, MultiPartParser does not

tests/file_uploads/urls.py

@@ -10,6 +10,7 @@ urlpatterns = patterns('',
     (r'^verify/$',          views.file_upload_view_verify),
     (r'^unicode_name/$',    views.file_upload_unicode_name),
     (r'^echo/$',            views.file_upload_echo),
+    (r'^echo_content_type_extra/$', views.file_upload_content_type_extra),
     (r'^echo_content/$',    views.file_upload_echo_content),
     (r'^quota/$',           views.file_upload_quota),
     (r'^quota/broken/$',    views.file_upload_quota_broken),

tests/file_uploads/views.py

@@ -7,7 +7,7 @@ import os
 from django.core.files.uploadedfile import UploadedFile
 from django.http import HttpResponse, HttpResponseServerError
 from django.utils import six
-from django.utils.encoding import force_bytes
+from django.utils.encoding import force_bytes, smart_str
 
 from .models import FileModel
 from .tests import UNICODE_FILENAME, UPLOAD_TO
@@ -136,3 +136,14 @@ def file_upload_filename_case_view(request):
     obj = FileModel()
     obj.testfile.save(file.name, file)
     return HttpResponse('%d' % obj.pk)
+
+def file_upload_content_type_extra(request):
+    """
+    Simple view to echo back extra content-type parameters.
+    """
+    params = {}
+    for file_name, uploadedfile in request.FILES.items():
+        params[file_name] = dict([
+            (k, smart_str(v)) for k, v in uploadedfile.content_type_extra.items()
+        ])
+    return HttpResponse(json.dumps(params))