Bypass DRP if a redirect cycle is detected

components/data_reduction_proxy/core/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_CORE_COMMON_DATA_REDUCTION_PROXY_HEADERS_H_
 #define COMPONENTS_DATA_REDUCTION_PROXY_CORE_COMMON_DATA_REDUCTION_PROXY_HEADERS_H_
 
 #include <string>
+#include <vector>
 
 #include "base/macros.h"
 #include "base/strings/string_piece.h"
 #include "base/time/time.h"
 #include "net/proxy/proxy_service.h"
 
+class GURL;
+
 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 {
 #define BYPASS_EVENT_TYPE(label, value) BYPASS_EVENT_TYPE_ ## label = value,
@@ skipping 90 matching lines @@
 // Returns true if the Chrome-Proxy-Content-Transform response header indicates
 // that a lite page has been provided.
 bool IsLitePagePreview(const net::HttpResponseHeaders& headers);
 
 // 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 ParseHeadersForBypassInfo(const net::HttpResponseHeaders* headers,
+bool ParseHeadersForBypassInfo(const net::HttpResponseHeaders& headers,
                                DataReductionProxyInfo* proxy_info);
 
 // Returns true if the response contains the data reduction proxy Via header
 // value. If non-NULL, sets |has_intermediary| to true if another server added
 // a Via header after the data reduction proxy, and to false otherwise. Used to
 // check the integrity of data reduction proxy responses and whether there are
 // other middleboxes between the data reduction proxy and the client.
-bool HasDataReductionProxyViaHeader(const net::HttpResponseHeaders* headers,
+bool HasDataReductionProxyViaHeader(const net::HttpResponseHeaders& headers,
                                     bool* has_intermediary);
 
 // Returns the reason why the Chrome proxy should be bypassed or not, and
 // populates |proxy_info| with information on how long to bypass if
-// applicable.
+// applicable. |url_chain| is the chain of URLs traversed by the request.
 DataReductionProxyBypassType GetDataReductionProxyBypassType(
-    const net::HttpResponseHeaders* headers,
+    const std::vector<GURL>& url_chain,
+    const net::HttpResponseHeaders& headers,
     DataReductionProxyInfo* proxy_info);
 
 // Searches for the specified Chrome-Proxy action, and if present saves its
 // value as a string in |action_value|. Only returns the first one and ignores
 // the rest if multiple actions match |action_prefix|.
 bool GetDataReductionProxyActionValue(const net::HttpResponseHeaders* headers,
                                       base::StringPiece action_prefix,
                                       std::string* action_value);
 
 // Searches for the specified Chrome-Proxy action, and if present interprets
@@ skipping 22 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_CORE_COMMON_DATA_REDUCTION_PROXY_HEADERS_H_