Added support for 'Chrome-Proxy: block-once' header

components/data_reduction_proxy/common/data_reduction_proxy_headers.h

 // 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.
 
 #ifndef COMPONENTS_DATA_REDUCTION_PROXY_COMMON_DATA_REDUCTION_PROXY_HEADERS_H_
 #define COMPONENTS_DATA_REDUCTION_PROXY_COMMON_DATA_REDUCTION_PROXY_HEADERS_H_
 
 #include <string>
 
 #include "base/macros.h"
 #include "base/time/time.h"
 #include "net/proxy/proxy_service.h"
 
 namespace net {
 
 class HttpResponseHeaders;
 
 }  // namespace net
 
 namespace data_reduction_proxy {
 
 // Values of the UMA DataReductionProxy.BypassType{Primary|Fallback}
 // and DataReductionProxy.BlockType{Primary|Fallback} histograms.
 // This enum must remain synchronized with the enum of the same
 // name in metrics/histograms/histograms.xml.
 enum DataReductionProxyBypassType {
   // Bypass due to explicit instruction for the current request.
-  // Not yet supported.
   BYPASS_EVENT_TYPE_CURRENT = 0,
 
   // Bypass the proxy for less than one minute.
   BYPASS_EVENT_TYPE_SHORT = 1,
 
   // Bypass the proxy for one to five minutes.
   BYPASS_EVENT_TYPE_MEDIUM = 2,
 
   // Bypass the proxy for more than five minutes.
   BYPASS_EVENT_TYPE_LONG = 3,
@@ skipping 18 matching lines @@
 
   // Bypass due to any network error.
   BYPASS_EVENT_TYPE_NETWORK_ERROR = 10,
 
   // This must always be last.
   BYPASS_EVENT_TYPE_MAX = 11
 };
 
 // Contains instructions contained in the Chrome-Proxy header.
 struct DataReductionProxyInfo {
-  DataReductionProxyInfo() : bypass_all(false) {}
+  DataReductionProxyInfo()
+      : bypass_all(false), mark_proxies_as_bad(false) {}
 
   // True if Chrome should bypass all available data reduction proxies. False
   // if only the currently connected data reduction proxy should be bypassed.
   bool bypass_all;
 
-  // Amount of time to bypass the data reduction proxy or proxies.
+  // True iff Chrome should mark the data reduction proxy or proxies as bad for
+  // the period of time specified in |bypass_duration|.
+  bool mark_proxies_as_bad;
+
+  // Amount of time to bypass the data reduction proxy or proxies. This value is
+  // ignored if |mark_proxies_as_bad| is false.
   base::TimeDelta bypass_duration;
 };
 
 // Returns true if the Chrome-Proxy header is present and contains a bypass
 // delay. Sets |proxy_info->bypass_duration| to the specified delay if greater
 // than 0, and to 0 otherwise to indicate that the default proxy delay
 // (as specified in |ProxyList::UpdateRetryInfoOnFallback|) should be used.
 // If all available data reduction proxies should by bypassed, |bypass_all| is
 // set to true. |proxy_info| must be non-NULL.
 bool ParseHeadersAndSetProxyInfo(const net::HttpResponseHeaders* headers,
@@ skipping 48 matching lines @@
     const net::HttpResponseHeaders* headers,
     std::string* content_length_fingerprint);
 
 // Returns values of the Chrome-Proxy header, but with its fingerprint removed.
 void GetDataReductionProxyHeaderWithFingerprintRemoved(
     const net::HttpResponseHeaders* headers,
     std::vector<std::string>* values);
 
 }  // namespace data_reduction_proxy
 #endif  // COMPONENTS_DATA_REDUCTION_PROXY_COMMON_DATA_REDUCTION_PROXY_HEADERS_H_