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      1 // Copyright (c) 2012 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 #include "chrome/browser/android/intercept_download_resource_throttle.h"
      6 
      7 #include "content/public/browser/android/download_controller_android.h"
      8 #include "content/public/browser/resource_controller.h"
      9 #include "net/http/http_request_headers.h"
     10 #include "net/http/http_response_headers.h"
     11 #include "net/url_request/url_request.h"
     12 
     13 #if defined(SPDY_PROXY_AUTH_ORIGIN)
     14 #include "chrome/browser/net/spdyproxy/data_reduction_proxy_settings.h"
     15 #endif  // defined(SPDY_PROXY_AUTH_ORIGIN)
     16 
     17 namespace chrome {
     18 
     19 InterceptDownloadResourceThrottle::InterceptDownloadResourceThrottle(
     20     net::URLRequest* request,
     21     int render_process_id,
     22     int render_view_id,
     23     int request_id)
     24     : request_(request),
     25       render_process_id_(render_process_id),
     26       render_view_id_(render_view_id),
     27       request_id_(request_id) {
     28 }
     29 
     30 InterceptDownloadResourceThrottle::~InterceptDownloadResourceThrottle() {
     31 }
     32 
     33 void InterceptDownloadResourceThrottle::WillStartRequest(bool* defer) {
     34   ProcessDownloadRequest();
     35 }
     36 
     37 void InterceptDownloadResourceThrottle::WillProcessResponse(bool* defer) {
     38   ProcessDownloadRequest();
     39 }
     40 
     41 const char* InterceptDownloadResourceThrottle::GetNameForLogging() const {
     42   return "InterceptDownloadResourceThrottle";
     43 }
     44 
     45 void InterceptDownloadResourceThrottle::ProcessDownloadRequest() {
     46   if (request_->method() != net::HttpRequestHeaders::kGetMethod)
     47     return;
     48 
     49   // In general, if the request uses HTTP authorization, either with the origin
     50   // or a proxy, then the network stack should handle the download. The one
     51   // exception is a request that is fetched via the Chrome Proxy and does not
     52   // authenticate with the origin.
     53   if (request_->response_info().did_use_http_auth) {
     54 #if defined(SPDY_PROXY_AUTH_ORIGIN)
     55     net::HttpRequestHeaders headers;
     56     request_->GetFullRequestHeaders(&headers);
     57     if (headers.HasHeader(net::HttpRequestHeaders::kAuthorization) ||
     58         !DataReductionProxySettings::WasFetchedViaProxy(
     59             request_->response_info().headers)) {
     60       return;
     61     }
     62 #else
     63     return;
     64 #endif
     65   }
     66 
     67   if (request_->url_chain().empty())
     68     return;
     69 
     70   GURL url = request_->url_chain().back();
     71   if (!url.SchemeIsHTTPOrHTTPS())
     72     return;
     73 
     74   content::DownloadControllerAndroid::Get()->CreateGETDownload(
     75       render_process_id_, render_view_id_, request_id_);
     76   controller()->Cancel();
     77 }
     78 
     79 }  // namespace chrome
     80