extensions/browser/url_request_util.cc

   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 #include "extensions/browser/url_request_util.h"
   6
   7 #include <string>
   8
   9 #include "content/public/browser/resource_request_info.h"
  10 #include "extensions/browser/guest_view/web_view/web_view_renderer_state.h"
  11 #include "extensions/browser/info_map.h"
  12 #include "extensions/common/extension.h"
  13 #include "extensions/common/manifest_handlers/icons_handler.h"
  14 #include "extensions/common/manifest_handlers/web_accessible_resources_info.h"
  15 #include "extensions/common/manifest_handlers/webview_info.h"
  16 #include "net/url_request/url_request.h"
  17
  18 namespace extensions {
  19 namespace url_request_util {
  20
  21 bool AllowCrossRendererResourceLoad(net::URLRequest* request,
  22                                     bool is_incognito,
  23                                     const Extension* extension,
  24                                     InfoMap* extension_info_map,
  25                                     bool* allowed) {
  26   const content::ResourceRequestInfo* info =
  27       content::ResourceRequestInfo::ForRequest(request);
  28
  29   // Extensions with webview: allow loading certain resources by guest renderers
  30   // with privileged partition IDs as specified in owner's extension the
  31   // manifest file.
  32   std::string owner_extension_id;
  33   int owner_process_id;
  34   WebViewRendererState::GetInstance()->GetOwnerInfo(
  35       info->GetChildID(), &owner_process_id, &owner_extension_id);
  36   const Extension* owner_extension =
  37       extension_info_map->extensions().GetByID(owner_extension_id);
  38   std::string partition_id;
  39   bool is_guest = WebViewRendererState::GetInstance()->GetPartitionID(
  40       info->GetChildID(), &partition_id);
  41   std::string resource_path = request->url().path();
  42   // |owner_extension == extension| needs to be checked because extension
  43   // resources should only be accessible to WebViews owned by that extension.
  44   if (is_guest && owner_extension == extension &&
  45       WebviewInfo::IsResourceWebviewAccessible(extension, partition_id,
  46                                                resource_path)) {
  47     *allowed = true;
  48     return true;
  49   }
  50
  51   // If the request is for navigations outside of webviews, then it should be
  52   // allowed. The navigation logic in CrossSiteResourceHandler will properly
  53   // transfer the navigation to a privileged process before it commits.
  54   if (content::IsResourceTypeFrame(info->GetResourceType()) && !is_guest) {
  55     *allowed = true;
  56     return true;
  57   }
  58
  59   if (!ui::PageTransitionIsWebTriggerable(info->GetPageTransition())) {
  60     *allowed = false;
  61     return true;
  62   }
  63
  64   // The following checks require that we have an actual extension object. If we
  65   // don't have it, allow the request handling to continue with the rest of the
  66   // checks.
  67   if (!extension) {
  68     *allowed = true;
  69     return true;
  70   }
  71
  72   // Disallow loading of packaged resources for hosted apps. We don't allow
  73   // hybrid hosted/packaged apps. The one exception is access to icons, since
  74   // some extensions want to be able to do things like create their own
  75   // launchers.
  76   std::string resource_root_relative_path =
  77       request->url().path().empty() ? std::string()
  78                                     : request->url().path().substr(1);
  79   if (extension->is_hosted_app() &&
  80       !IconsInfo::GetIcons(extension)
  81            .ContainsPath(resource_root_relative_path)) {
  82     LOG(ERROR) << "Denying load of " << request->url().spec() << " from "
  83                << "hosted app.";
  84     *allowed = false;
  85     return true;
  86   }
  87
  88   // Extensions with web_accessible_resources: allow loading by regular
  89   // renderers. Since not all subresources are required to be listed in a v2
  90   // manifest, we must allow all loads if there are any web accessible
  91   // resources. See http://crbug.com/179127.
  92   if (extension->manifest_version() < 2 ||
  93       WebAccessibleResourcesInfo::HasWebAccessibleResources(extension)) {
  94     *allowed = true;
  95     return true;
  96   }
  97
  98   // Couldn't determine if the resource is allowed or not.
  99   return false;
 100 }
 101
 102 bool IsWebViewRequest(const net::URLRequest* request) {
 103   const content::ResourceRequestInfo* info =
 104       content::ResourceRequestInfo::ForRequest(request);
 105   // |info| can be NULL sometimes: http://crbug.com/370070.
 106   if (!info)
 107     return false;
 108   return WebViewRendererState::GetInstance()->IsGuest(info->GetChildID());
 109 }
 110
 111 }  // namespace url_request_util
 112 }  // namespace extensions