components/navigation_interception/intercept_navigation_resource_throttle.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 "components/navigation_interception/intercept_navigation_resource_throttle.h"
   6
   7 #include "components/navigation_interception/navigation_params.h"
   8 #include "content/public/browser/browser_thread.h"
   9 #include "content/public/browser/child_process_security_policy.h"
  10 #include "content/public/browser/render_frame_host.h"
  11 #include "content/public/browser/render_process_host.h"
  12 #include "content/public/browser/resource_controller.h"
  13 #include "content/public/browser/resource_request_info.h"
  14 #include "content/public/browser/web_contents.h"
  15 #include "content/public/common/page_transition_types.h"
  16 #include "content/public/common/referrer.h"
  17 #include "net/http/http_response_headers.h"
  18 #include "net/url_request/url_request.h"
  19
  20 using content::BrowserThread;
  21 using content::ChildProcessSecurityPolicy;
  22 using content::PageTransition;
  23 using content::Referrer;
  24 using content::RenderProcessHost;
  25 using content::ResourceRequestInfo;
  26
  27 namespace navigation_interception {
  28
  29 namespace {
  30
  31 void CheckIfShouldIgnoreNavigationOnUIThread(
  32     int render_process_id,
  33     int render_frame_id,
  34     const NavigationParams& navigation_params,
  35     InterceptNavigationResourceThrottle::CheckOnUIThreadCallback
  36     should_ignore_callback,
  37     base::Callback<void(bool)> callback) {
  38   bool should_ignore_navigation = false;
  39   RenderProcessHost* rph = RenderProcessHost::FromID(render_process_id);
  40   if (rph) {
  41     NavigationParams validated_params(navigation_params);
  42     rph->FilterURL(false, &validated_params.url());
  43
  44     content::RenderFrameHost* render_frame_host =
  45         content::RenderFrameHost::FromID(render_process_id, render_frame_id);
  46     content::WebContents* web_contents =
  47         content::WebContents::FromRenderFrameHost(render_frame_host);
  48
  49     if (web_contents) {
  50       should_ignore_navigation = should_ignore_callback.Run(web_contents,
  51                                                             validated_params);
  52     }
  53   }
  54
  55   BrowserThread::PostTask(
  56       BrowserThread::IO,
  57       FROM_HERE,
  58       base::Bind(callback, should_ignore_navigation));
  59 }
  60
  61 } // namespace
  62
  63 InterceptNavigationResourceThrottle::InterceptNavigationResourceThrottle(
  64     net::URLRequest* request,
  65     CheckOnUIThreadCallback should_ignore_callback)
  66     : request_(request),
  67       should_ignore_callback_(should_ignore_callback),
  68       weak_ptr_factory_(this) {
  69 }
  70
  71 InterceptNavigationResourceThrottle::~InterceptNavigationResourceThrottle() {
  72   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
  73 }
  74
  75 void InterceptNavigationResourceThrottle::WillStartRequest(bool* defer) {
  76   *defer =
  77       CheckIfShouldIgnoreNavigation(request_->url(), request_->method(), false);
  78 }
  79
  80 void InterceptNavigationResourceThrottle::WillRedirectRequest(
  81     const GURL& new_url,
  82     bool* defer) {
  83   *defer =
  84       CheckIfShouldIgnoreNavigation(new_url, GetMethodAfterRedirect(), true);
  85 }
  86
  87 const char* InterceptNavigationResourceThrottle::GetNameForLogging() const {
  88   return "InterceptNavigationResourceThrottle";
  89 }
  90
  91 std::string InterceptNavigationResourceThrottle::GetMethodAfterRedirect() {
  92   net::HttpResponseHeaders* headers = request_->response_headers();
  93   if (!headers)
  94     return request_->method();
  95   // TODO(davidben): Plumb net::RedirectInfo through content::ResourceThrottle
  96   // and unexpose net::URLRequest::ComputeMethodForRedirect.
  97   return net::URLRequest::ComputeMethodForRedirect(
  98              request_->method(), headers->response_code());
  99 }
 100
 101 bool InterceptNavigationResourceThrottle::CheckIfShouldIgnoreNavigation(
 102     const GURL& url,
 103     const std::string& method,
 104     bool is_redirect) {
 105   const ResourceRequestInfo* info = ResourceRequestInfo::ForRequest(request_);
 106   if (!info)
 107     return false;
 108
 109   int render_process_id, render_frame_id;
 110   if (!info->GetAssociatedRenderFrame(&render_process_id, &render_frame_id))
 111     return false;
 112
 113   NavigationParams navigation_params(url,
 114                                      Referrer(GURL(request_->referrer()),
 115                                               info->GetReferrerPolicy()),
 116                                      info->HasUserGesture(),
 117                                      method == "POST",
 118                                      info->GetPageTransition(),
 119                                      is_redirect);
 120
 121   BrowserThread::PostTask(
 122       BrowserThread::UI,
 123       FROM_HERE,
 124       base::Bind(
 125           &CheckIfShouldIgnoreNavigationOnUIThread,
 126           render_process_id,
 127           render_frame_id,
 128           navigation_params,
 129           should_ignore_callback_,
 130           base::Bind(
 131               &InterceptNavigationResourceThrottle::OnResultObtained,
 132               weak_ptr_factory_.GetWeakPtr())));
 133
 134   // Defer request while we wait for the UI thread to check if the navigation
 135   // should be ignored.
 136   return true;
 137 }
 138
 139 void InterceptNavigationResourceThrottle::OnResultObtained(
 140     bool should_ignore_navigation) {
 141   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 142
 143   if (should_ignore_navigation) {
 144     controller()->CancelAndIgnore();
 145   } else {
 146     controller()->Resume();
 147   }
 148 }
 149
 150 }  // namespace navigation_interception