lib/python/web_support.py

@@ -661,6 +661,7 @@ class HTMLResult(Result):
         buf.write('\n')
         self.contents.flatten(buf.write)
         buf = buf.getvalue()
+        self.headers['Content-Length'] = str(len(buf))
         def later(req):
             headers_later(req)
             req.wfile.write(buf)