src/components/data_reduction_proxy/core/browser/data_reduction_proxy_interceptor.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef COMPONENTS_DATA_REDUCTION_PROXY_CORE_BROWSER_DATA_REDUCTION_PROXY_INTERCEPTOR_H_
   6 #define COMPONENTS_DATA_REDUCTION_PROXY_CORE_BROWSER_DATA_REDUCTION_PROXY_INTERCEPTOR_H_
   7
   8 #include "net/url_request/url_request_interceptor.h"
   9
  10 namespace data_reduction_proxy {
  11 class DataReductionProxyParams;
  12 class DataReductionProxyUsageStats;
  13
  14 // Used to intercept responses that contain explicit and implicit signals
  15 // to bypass the data reduction proxy. If the proxy should be bypassed,
  16 // the interceptor returns a new URLRequestHTTPJob that fetches the resource
  17 // without use of the proxy.
  18 class DataReductionProxyInterceptor : public net::URLRequestInterceptor {
  19  public:
  20   // Constructs the interceptor. |params| and |stats| must outlive |this|.
  21   // |stats| may be NULL.
  22   DataReductionProxyInterceptor(DataReductionProxyParams* params,
  23                                 DataReductionProxyUsageStats* stats);
  24
  25   // Destroys the interceptor.
  26   ~DataReductionProxyInterceptor() override;
  27
  28   // Overrides from net::URLRequestInterceptor:
  29   net::URLRequestJob* MaybeInterceptRequest(
  30       net::URLRequest* request,
  31       net::NetworkDelegate* network_delegate) const override;
  32
  33   // Returns a new URLRequestHTTPJob if the response indicates that the data
  34   // reduction proxy should be bypassed according to the rules in
  35   // data_reduction_proxy_protocol.cc. Returns NULL otherwise. If a job is
  36   // returned, the interceptor's URLRequestInterceptingJobFactory will restart
  37   // the request.
  38   net::URLRequestJob* MaybeInterceptResponse(
  39       net::URLRequest* request,
  40       net::NetworkDelegate* network_delegate) const override;
  41
  42  private:
  43   // Must outlive |this|.
  44   DataReductionProxyParams* params_;
  45
  46   // Must outlive |this| if non-NULL.
  47   DataReductionProxyUsageStats* usage_stats_;
  48
  49   DISALLOW_COPY_AND_ASSIGN(DataReductionProxyInterceptor);
  50 };
  51
  52 }  // namespace data_reduction_proxy
  53 #endif  // COMPONENTS_DATA_REDUCTION_PROXY_CORE_BROWSER_DATA_REDUCTION_PROXY_INTERCEPTOR_H_