Fixes https://github.com/spulec/moto/issues/74

moto/core/responses.py

@@ -9,13 +9,25 @@ from moto.core.utils import camelcase_to_underscores, method_names_from_class
 class BaseResponse(object):
 
     def dispatch(self, request, full_url, headers):
+        querystring = None
+
         if hasattr(request, 'body'):
             # Boto
             self.body = request.body
         else:
             # Flask server
+
+            # FIXME: At least in Flask==0.10.1, request.data is an empty string
+            # and the information we want is in request.form. Keeping self.body
+            # definition for back-compatibility
             self.body = request.data
 
+            querystring = {}
+            for key, value in request.form.iteritems():
+                querystring[key] = [value,]
+
+
+        if querystring is None:
             querystring = parse_qs(urlparse(full_url).query)
             if not querystring:
                 querystring = parse_qs(self.body)