Integration test for “lo-fi” mode in Chrome-Proxy request header

tools/chrome_proxy/integration_tests/network_metrics.py

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import base64
 import gzip
 import hashlib
 import io
 import logging
 import zlib
@@ skipping 80 matching lines @@
       return len(zlib.compress(body, 9))
     else:
       raise NetworkMetricException, (
           'Unknown Content-Encoding %s for %s' % (encoding, resp.url))
 
   def GetContentLength(self):
     cl = 0
     try:
       cl = self.GetContentLengthFromBody()
     except Exception, e:
+      logging.warning('Fail to get content length for %s from body: %s',
+                      self.response.url[:100], e)
+    if cl == 0:
       resp = self.response
-      logging.warning('Fail to get content length for %s from body: %s',
-                      resp.url[:100], e)
       cl_header = resp.GetHeader('Content-Length')
       if cl_header:
         cl = int(cl_header)
       else:
         body, _ = resp.GetBody()
         if body:
           cl = len(body)
     return cl
 
   @staticmethod
@@ skipping 49 matching lines @@
       if resp.response.served_from_cache:
         continue
 
       resource = resp.response.url
       resource_signature = resp.url_signature
       cl = resp.content_length
       if resp.has_original_content_length:
         ocl = resp.original_content_length
         if ocl < cl:
           logging.warning('original content length (%d) is less than content '
-                        'lenght(%d) for resource %s', ocl, cl, resource)
+                          'length (%d) for resource %s', ocl, cl, resource)
         if self.add_result_for_resource:
           results.AddValue(scalar.ScalarValue(
               results.current_page,
               'resource_data_saving_' + resource_signature, 'percent',
               resp.data_saving_rate * 100))
           results.AddValue(scalar.ScalarValue(
               results.current_page,
               'resource_original_content_length_' + resource_signature, 'bytes',
               ocl))
         original_content_length += ocl
@@ skipping 13 matching lines @@
     if self.compute_data_saving:
       if (original_content_length > 0 and
           original_content_length >= content_length):
         saving = (float(original_content_length-content_length) * 100 /
                   original_content_length)
         results.AddValue(scalar.ScalarValue(
             results.current_page, 'data_saving', 'percent', saving))
       else:
         results.AddValue(scalar.ScalarValue(
             results.current_page, 'data_saving', 'percent', 0.0))