diff --git a/mitmproxy/web/app.py b/mitmproxy/web/app.py
index 56f7f67dc..eaef887ad 100644
--- a/mitmproxy/web/app.py
+++ b/mitmproxy/web/app.py
@@ -8,6 +8,7 @@ import re
 
 import six
 import tornado.websocket
+import tornado.web
 from io import BytesIO
 from mitmproxy.flow import FlowWriter, FlowReader
 
@@ -293,19 +294,11 @@ class ReplayFlow(RequestHandler):
 
 class FlowContent(RequestHandler):
 
-    def post (self, flow_id, message):
-        # handle request later now just change response content
-
-        flow = self.flow
-        flow.backup()
-        content = self.request.files.values()[0][0].body
-        if (message == "response"):
-            with models.decoded(flow.response):
-                flow.response.content = content
-        elif(message == "request"):
-            with models.decoded(flow.request):
-                flow.request.content = content
-        self.state.update_flow(flow)
+    def post(self, flow_id, message):
+        self.flow.backup()
+        message = getattr(self.flow, message)
+        message.content = self.request.files.values()[0][0].body
+        self.state.update_flow(self.flow)
 
     def get(self, flow_id, message):
         message = getattr(self.flow, message)