Clean up some headers Tornado sets

calparrot/proxy.py

@@ -159,12 +159,21 @@ class ProxyHandler(RequestHandler):
 
         response = await self._get_with_cache(req_path)
 
-        # Forward the response to the client
+        # Forward the response to the client ----------------
+        # 1. Status line
         self.set_status(response.status, response.reason)
+
+        # 2. Headers
+        # Clear default headers set by Tornado - values will come from upstream
+        self.clear_header('Server')
+        self.clear_header('Date')
+        self.clear_header('Content-Type')
         for header, value in response.headers.get_all():
             self.add_header(header, value)
-        if response.body:
-            await self.finish(response.body)
+        self.add_header('Via', 'HTTP/1.1 CalParrot')
+
+        # 3. Body
+        await self.finish(response.body)
 
 
 class ShutdownHandler(RequestHandler):