Chrome Participated Tamper Detect

components/data_reduction_proxy/common/data_reduction_proxy_headers.cc

 // 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.
 
 #include "components/data_reduction_proxy/common/data_reduction_proxy_headers.h"
 
 #include <string>
 
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_piece.h"
 #include "base/strings/string_util.h"
 #include "base/time/time.h"
 #include "net/http/http_response_headers.h"
 #include "net/http/http_status_code.h"
 #include "net/proxy/proxy_service.h"
 
 using base::StringPiece;
 using base::TimeDelta;
 using net::ProxyService;
 
 namespace data_reduction_proxy {
 
+namespace fingerprint_actions {
+
+const char kTamperDetectFingerprintChromeProxy[]   = "fcp";
+const char kTamperDetectFingerprintVia[]           = "fvia";
+const char kTamperDetectFingerprintOtherHeaders[]  = "foh";
+const char kTamperDetectFingerprintContentLength[] = "fcl";
+
+}  // namespace fingerprint_actions
+
 bool GetDataReductionProxyBypassDuration(
     const net::HttpResponseHeaders* headers,
     const std::string& action_prefix,
     base::TimeDelta* duration) {
   void* iter = NULL;
   std::string value;
   std::string name = "chrome-proxy";
 
   while (headers->EnumerateHeader(&iter, name, &value)) {
     if (value.size() > action_prefix.size()) {
@@ skipping 101 matching lines @@
         headers->response_code() < net::HTTP_INTERNAL_SERVER_ERROR) {
       return ProxyService::PROXY_4XX_BYPASS;
     }
     return ProxyService::MISSING_VIA_HEADER;
   }
   // There is no bypass event.
   return ProxyService::BYPASS_EVENT_TYPE_MAX;
 }
 
 }  // namespace data_reduction_proxy