Http cache: Handle byte range requests when there is no cache entry....

net/http/http_cache.cc

 // Copyright (c) 2006-2009 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.
 
 #include "net/http/http_cache.h"
 
 #include <algorithm>
 #include <string>
 
 #include "base/compiler_specific.h"
@@ skipping 1196 matching lines @@
 // end up forwarding the 200 back to the user (so far so good). However, if
 // we have instead the first 10KB, we end up sending back a byte range response
 // for the first 10KB, because we never asked the server for the last part. It's
 // just too complicated to restart the whole request from this point; and of
 // course, maybe we already returned the headers.
 bool HttpCache::Transaction::ValidatePartialResponse(
     const HttpResponseHeaders* headers) {
   int response_code = headers->response_code();
   bool partial_content = enable_range_support_ ? response_code == 206 : false;
 
+  if (!entry_)
+    return false;
+
   if (invalid_range_) {
     // We gave up trying to match this request with the stored data. If the
     // server is ok with the request, delete the entry, otherwise just ignore
     // this request
     if (partial_content || response_code == 200 || response_code == 304) {
       DoomPartialEntry(true);
       mode_ = NONE;
     } else {
       IgnoreRangeRequest();
     }
@@ skipping 884 matching lines @@
       static_cast<net::HttpNetworkLayer*>(network_layer_.get());
   HttpNetworkSession* session = network->GetSession();
   if (session) {
     session->tcp_socket_pool()->CloseIdleSockets();
   }
 }
 
 //-----------------------------------------------------------------------------
 
 }  // namespace net