Support for new data reduction proxy via header

net/http/http_network_transaction.cc

 // Copyright (c) 2012 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_network_transaction.h"
 
 #include <set>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 101 matching lines @@
     uint16 version_after,
     NetLog::LogLevel /* log_level */) {
   base::DictionaryValue* dict = new base::DictionaryValue();
   dict->SetString("host_and_port", GetHostAndPort(*url));
   dict->SetInteger("net_error", net_error);
   dict->SetInteger("version_before", version_before);
   dict->SetInteger("version_after", version_after);
   return dict;
 }
 
-#if defined(SPDY_PROXY_AUTH_ORIGIN)
-// Returns true if |response_headers| contains the data reduction proxy Via
-// header value.
-bool IsChromeProxyResponse(const net::HttpResponseHeaders* response_headers) {
-  if (!response_headers) {
-    return false;
-  }
-  const char kDataReductionProxyViaValue[] = "1.1 Chrome Compression Proxy";
-  size_t value_len = strlen(kDataReductionProxyViaValue);
-  void* iter = NULL;
-  std::string temp;
-  while (response_headers->EnumerateHeader(&iter, "Via", &temp)) {
-    std::string::const_iterator it =
-        std::search(temp.begin(), temp.end(),
-                    kDataReductionProxyViaValue,
-                    kDataReductionProxyViaValue + value_len,
-                    base::CaseInsensitiveCompareASCII<char>());
-    if (it != temp.end())
-      return true;
-  }
-  return false;
-}
-#endif
-
 }  // namespace
 
 //-----------------------------------------------------------------------------
 
 HttpNetworkTransaction::HttpNetworkTransaction(RequestPriority priority,
                                                HttpNetworkSession* session)
     : pending_auth_target_(HttpAuth::AUTH_NONE),
       io_callback_(base::Bind(&HttpNetworkTransaction::OnIOComplete,
                               base::Unretained(this))),
       session_(session),
@@ skipping 880 matching lines @@
         proxy_info_.proxy_server().isDataReductionProxy();
     bool chrome_fallback_proxy_used = false;
 #if defined(DATA_REDUCTION_FALLBACK_HOST)
     if (!chrome_proxy_used) {
       chrome_fallback_proxy_used =
           proxy_info_.proxy_server().isDataReductionProxyFallback();
     }
 #endif
 
     if (chrome_proxy_used || chrome_fallback_proxy_used) {
-      if (!IsChromeProxyResponse(response_.headers.get())) {
+      if (!response_.headers->IsChromeProxyResponse()) {
         proxy_bypass_event = ProxyService::MISSING_VIA_HEADER;
       } else if (response_.headers->GetChromeProxyInfo(&chrome_proxy_info)) {
         if (chrome_proxy_info.bypass_duration < TimeDelta::FromMinutes(30))
           proxy_bypass_event = ProxyService::SHORT_BYPASS;
         else
           proxy_bypass_event = ProxyService::LONG_BYPASS;
       } else {
         // Additionally, fallback if a 500, 502 or 503 is returned via the data
         // reduction proxy. This is conservative, as the 500, 502 or 503 might
         // have been generated by the origin, and not the proxy.
@@ skipping 590 matching lines @@
       description = base::StringPrintf("Unknown state 0x%08X (%u)", state,
                                        state);
       break;
   }
   return description;
 }
 
 #undef STATE_CASE
 
 }  // namespace net