Add support for multipart/form-data

This will allow mutations with file uploads

Author: amitsaha

graphql_flask/graphqlview.py

@@ -95,7 +95,6 @@ def json_encode(self, request, d):
     # noinspection PyBroadException
     def parse_body(self, request):
         content_type = self.get_content_type(request)
-
         if content_type == 'application/graphql':
             return {'query': request.data.decode()}
 
@@ -110,6 +109,9 @@ def parse_body(self, request):
         elif content_type == 'application/x-www-form-urlencoded':
             return request.form
 
+        elif content_type == 'multipart/form-data':
+            return request.form
+
         return {}
 
     def _execute(self, *args, **kwargs):

tests/test_graphqlview.py

@@ -1,6 +1,11 @@
 import pytest
 import json
 
+try:
+    from StringIO import StringIO
+except ImportError:
+    from io import StringIO
+
 try:
     from urllib import urlencode
 except ImportError:
@@ -420,3 +425,17 @@ def test_passes_request_into_request_context(client):
             'request': 'testing'
         }
     }
+
+def test_post_multipart_data(client):
+    query = 'mutation TestMutation { writeTest { test } }'
+    response = client.post(
+        url_string(),
+        data= {
+            'query': query,
+            'file': (StringIO(), 'text1.txt'),
+        },
+        content_type='multipart/form-data'
+    )
+
+    assert response.status_code == 200
+    assert response_json(response) == {'data': {u'writeTest': {u'test': u'Hello World'}}}