Bypass the DataReductionProxy for all POST requests

net/proxy/proxy_service.h

 // 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.
 
 #ifndef NET_PROXY_PROXY_SERVICE_H_
 #define NET_PROXY_PROXY_SERVICE_H_
 
 #include <stddef.h>
 
 #include <set>
@@ skipping 89 matching lines @@
   ProxyService(scoped_ptr<ProxyConfigService> config_service,
                scoped_ptr<ProxyResolverFactory> resolver_factory,
                NetLog* net_log);
 
   ~ProxyService() override;
 
   // Used internally to handle PAC queries.
   // TODO(eroman): consider naming this simply "Request".
   class PacRequest;
 
+  // Determines the appropriate proxy for |url| for a |method| request and

[hashimoto, 2016/03/02 05:47:59]

nit: How about adding a description about what happens when |method| is empty
like the one in proxy_delegate.h?
It seems almost all ProxyService users are passing empty strings.

+  // stores the result in |results|.
+  //
   // Returns ERR_IO_PENDING if the proxy information could not be provided
   // synchronously, to indicate that the result will be available when the
   // callback is run.  The callback is run on the thread that calls
   // ResolveProxy.
   //
   // The caller is responsible for ensuring that |results| and |callback|
   // remain valid until the callback is run or until |pac_request| is cancelled
   // via CancelPacRequest.  |pac_request| is only valid while the completion
   // callback is still pending. NULL can be passed for |pac_request| if
   // the caller will not need to cancel the request.
   //
   // We use the three possible proxy access types in the following order,
   // doing fallback if one doesn't work.  See "pac_script_decider.h"
   // for the specifics.
   //   1.  WPAD auto-detection
   //   2.  PAC URL
   //   3.  named proxy
   //
   // Profiling information for the request is saved to |net_log| if non-NULL.
   int ResolveProxy(const GURL& url,
+                   const std::string& method,
                    int load_flags,
                    ProxyInfo* results,
                    const CompletionCallback& callback,
                    PacRequest** pac_request,
                    ProxyDelegate* proxy_delegate,
                    const BoundNetLog& net_log);
 
   // Returns true if the proxy information could be determined without spawning
   // an asynchronous task.  Otherwise, |result| is unmodified.
   bool TryResolveProxySynchronously(const GURL& raw_url,
+                                    const std::string& method,
                                     int load_flags,
                                     ProxyInfo* result,
                                     ProxyDelegate* proxy_delegate,
                                     const BoundNetLog& net_log);
 
   // This method is called after a failure to connect or resolve a host name.
   // It gives the proxy service an opportunity to reconsider the proxy to use.
   // The |results| parameter contains the results returned by an earlier call
   // to ResolveProxy.  The |net_error| parameter contains the network error
   // code associated with the failure. See "net/base/net_error_list.h" for a
   // list of possible values. The semantics of this call are otherwise
   // similar to ResolveProxy.
   //
   // NULL can be passed for |pac_request| if the caller will not need to
   // cancel the request.
   //
   // Returns ERR_FAILED if there is not another proxy config to try.
   //
   // Profiling information for the request is saved to |net_log| if non-NULL.
   int ReconsiderProxyAfterError(const GURL& url,
+                                const std::string& method,
                                 int load_flags,
                                 int net_error,
                                 ProxyInfo* results,
                                 const CompletionCallback& callback,
                                 PacRequest** pac_request,
                                 ProxyDelegate* proxy_delegate,
                                 const BoundNetLog& net_log);
 
   // Explicitly trigger proxy fallback for the given |results| by updating our
   // list of bad proxies to include the first entry of |results|, and,
@@ skipping 156 matching lines @@
   // Completing synchronously means we don't need to query ProxyResolver.
   int TryToCompleteSynchronously(const GURL& url,
                                  int load_flags,
                                  ProxyDelegate* proxy_delegate,
                                  ProxyInfo* result);
 
   // Identical to ResolveProxy, except that |callback| is permitted to be null.
   // if |callback.is_null()|, this function becomes a thin wrapper around
   // |TryToCompleteSynchronously|.
   int ResolveProxyHelper(const GURL& url,
+                         const std::string& method,
                          int load_flags,
                          ProxyInfo* results,
                          const CompletionCallback& callback,
                          PacRequest** pac_request,
                          ProxyDelegate* proxy_delegate,
                          const BoundNetLog& net_log);
 
   // Cancels all of the requests sent to the ProxyResolver. These will be
   // restarted when calling SetReady().
   void SuspendAllPendingRequests();
 
   // Advances the current state to |STATE_READY|, and resumes any pending
   // requests which had been stalled waiting for initialization to complete.
   void SetReady();
 
   // Returns true if |pending_requests_| contains |req|.
   bool ContainsPendingRequest(PacRequest* req);
 
   // Removes |req| from the list of pending requests.
   void RemovePendingRequest(PacRequest* req);
 
   // Called when proxy resolution has completed (either synchronously or
   // asynchronously). Handles logging the result, and cleaning out
   // bad entries from the results list.
   int DidFinishResolvingProxy(const GURL& url,
+                              const std::string& method,
                               int load_flags,
                               ProxyDelegate* proxy_delegate,
                               ProxyInfo* result,
                               int result_code,
                               const BoundNetLog& net_log,
                               base::TimeTicks start_time,
                               bool script_executed);
 
   // Start initialization using |fetched_config_|.
   void InitializeUsingLastFetchedConfig();
@@ skipping 79 matching lines @@
 
   // Whether child ProxyScriptDeciders should use QuickCheck
   bool quick_check_enabled_;
 
   DISALLOW_COPY_AND_ASSIGN(ProxyService);
 };
 
 }  // namespace net
 
 #endif  // NET_PROXY_PROXY_SERVICE_H_