android_webview/browser/aw_request_interceptor.cc

   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 "android_webview/browser/aw_request_interceptor.h"
   6
   7 #include "android_webview/browser/aw_contents_io_thread_client.h"
   8 #include "android_webview/browser/aw_web_resource_response.h"
   9 #include "base/android/jni_string.h"
  10 #include "base/memory/scoped_ptr.h"
  11 #include "content/public/browser/browser_thread.h"
  12 #include "content/public/browser/render_view_host.h"
  13 #include "content/public/browser/resource_request_info.h"
  14 #include "net/url_request/url_request.h"
  15 #include "net/url_request/url_request_context.h"
  16 #include "net/url_request/url_request_context_getter.h"
  17 #include "net/url_request/url_request_job.h"
  18
  19 using content::BrowserThread;
  20 using content::RenderViewHost;
  21 using content::ResourceRequestInfo;
  22
  23 namespace android_webview {
  24
  25 namespace {
  26
  27 const void* kRequestAlreadyQueriedDataKey = &kRequestAlreadyQueriedDataKey;
  28
  29 } // namespace
  30
  31 AwRequestInterceptor::AwRequestInterceptor() {
  32 }
  33
  34 AwRequestInterceptor::~AwRequestInterceptor() {
  35 }
  36
  37 scoped_ptr<AwWebResourceResponse>
  38 AwRequestInterceptor::QueryForAwWebResourceResponse(
  39     const GURL& location,
  40     net::URLRequest* request) const {
  41   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
  42   int render_process_id, render_frame_id;
  43   if (!ResourceRequestInfo::GetRenderFrameForRequest(
  44       request, &render_process_id, &render_frame_id))
  45     return scoped_ptr<AwWebResourceResponse>();
  46
  47   scoped_ptr<AwContentsIoThreadClient> io_thread_client =
  48       AwContentsIoThreadClient::FromID(render_process_id, render_frame_id);
  49
  50   if (!io_thread_client.get())
  51     return scoped_ptr<AwWebResourceResponse>();
  52
  53   return io_thread_client->ShouldInterceptRequest(location, request).Pass();
  54 }
  55
  56 net::URLRequestJob* AwRequestInterceptor::MaybeInterceptRequest(
  57     net::URLRequest* request,
  58     net::NetworkDelegate* network_delegate) const {
  59   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
  60
  61   // See if we've already found out the aw_web_resource_response for this
  62   // request.
  63   // This is done not only for efficiency reasons, but also for correctness
  64   // as it is possible for the Interceptor chain to be invoked more than once
  65   // in which case we don't want to query the embedder multiple times.
  66   // Note: The Interceptor chain is not invoked more than once if we create a
  67   // URLRequestJob in this method, so this is only caching negative hits.
  68   if (request->GetUserData(kRequestAlreadyQueriedDataKey))
  69     return NULL;
  70   request->SetUserData(kRequestAlreadyQueriedDataKey,
  71                        new base::SupportsUserData::Data());
  72
  73   scoped_ptr<AwWebResourceResponse> aw_web_resource_response =
  74       QueryForAwWebResourceResponse(request->url(), request);
  75
  76   if (!aw_web_resource_response)
  77     return NULL;
  78
  79   // The newly created job will own the AwWebResourceResponse.
  80   return AwWebResourceResponse::CreateJobFor(
  81       aw_web_resource_response.Pass(), request, network_delegate);
  82 }
  83
  84 } // namespace android_webview