extensions/browser/guest_view/extension_view/extension_view_guest.cc

   1 // Copyright 2015 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/guest_view/extension_view/extension_view_guest.h"
   6
   7 #include "base/strings/string_util.h"
   8 #include "components/crx_file/id_util.h"
   9 #include "content/public/browser/render_process_host.h"
  10 #include "content/public/common/result_codes.h"
  11 #include "extensions/browser/api/extensions_api_client.h"
  12 #include "extensions/browser/bad_message.h"
  13 #include "extensions/browser/guest_view/extension_view/extension_view_constants.h"
  14 #include "extensions/browser/guest_view/guest_view_event.h"
  15 #include "extensions/common/constants.h"
  16 #include "extensions/common/extension_messages.h"
  17 #include "extensions/strings/grit/extensions_strings.h"
  18
  19 using content::WebContents;
  20 using namespace extensions::core_api;
  21
  22 namespace extensions {
  23
  24 // static
  25 const char ExtensionViewGuest::Type[] = "extensionview";
  26
  27 ExtensionViewGuest::ExtensionViewGuest(
  28     content::WebContents* owner_web_contents)
  29     : GuestView<ExtensionViewGuest>(owner_web_contents),
  30       extension_view_guest_delegate_(
  31           extensions::ExtensionsAPIClient::Get()
  32               ->CreateExtensionViewGuestDelegate(this)) {
  33 }
  34
  35 ExtensionViewGuest::~ExtensionViewGuest() {
  36 }
  37
  38 // static
  39 extensions::GuestViewBase* ExtensionViewGuest::Create(
  40     content::WebContents* owner_web_contents) {
  41   return new ExtensionViewGuest(owner_web_contents);
  42 }
  43
  44 void ExtensionViewGuest::NavigateGuest(const std::string& src,
  45                                        bool force_navigation) {
  46   GURL url = extension_url_.Resolve(src);
  47
  48   // If the URL is not valid, about:blank, or the same origin as the extension,
  49   // then navigate to about:blank.
  50   bool url_not_allowed = (url != GURL(url::kAboutBlankURL)) &&
  51       (url.GetOrigin() != extension_url_.GetOrigin());
  52   if (!url.is_valid() || url_not_allowed) {
  53     NavigateGuest(url::kAboutBlankURL, true /* force_navigation */);
  54     return;
  55   }
  56
  57   if (!force_navigation && (view_page_ == url))
  58     return;
  59
  60   web_contents()->GetRenderProcessHost()->FilterURL(false, &url);
  61   web_contents()->GetController().LoadURL(url, content::Referrer(),
  62                                           ui::PAGE_TRANSITION_AUTO_TOPLEVEL,
  63                                           std::string());
  64
  65   view_page_ = url;
  66 }
  67
  68 // GuestViewBase implementation.
  69 bool ExtensionViewGuest::CanRunInDetachedState() const {
  70   return true;
  71 }
  72
  73 void ExtensionViewGuest::CreateWebContents(
  74     const base::DictionaryValue& create_params,
  75     const WebContentsCreatedCallback& callback) {
  76   // Gets the extension ID.
  77   std::string extension_id;
  78   create_params.GetString(extensionview::kAttributeExtension, &extension_id);
  79
  80   if (!crx_file::id_util::IdIsValid(extension_id)) {
  81     callback.Run(nullptr);
  82     return;
  83   }
  84
  85   // Gets the extension URL.
  86   extension_url_ =
  87       extensions::Extension::GetBaseURLFromExtensionId(extension_id);
  88
  89   if (!extension_url_.is_valid()) {
  90     callback.Run(nullptr);
  91     return;
  92   }
  93
  94   content::SiteInstance* view_site_instance =
  95       content::SiteInstance::CreateForURL(browser_context(),
  96                                           extension_url_);
  97
  98   WebContents::CreateParams params(browser_context(), view_site_instance);
  99   params.guest_delegate = this;
 100   callback.Run(WebContents::Create(params));
 101 }
 102
 103 void ExtensionViewGuest::DidInitialize(
 104     const base::DictionaryValue& create_params) {
 105   extension_function_dispatcher_.reset(
 106       new extensions::ExtensionFunctionDispatcher(browser_context(), this));
 107
 108   if (extension_view_guest_delegate_)
 109     extension_view_guest_delegate_->DidInitialize();
 110
 111   ApplyAttributes(create_params);
 112 }
 113
 114 void ExtensionViewGuest::DidAttachToEmbedder() {
 115   ApplyAttributes(*attach_params());
 116 }
 117
 118 const char* ExtensionViewGuest::GetAPINamespace() const {
 119   return extensionview::kAPINamespace;
 120 }
 121
 122 int ExtensionViewGuest::GetTaskPrefix() const {
 123   return IDS_EXTENSION_TASK_MANAGER_EXTENSIONVIEW_TAG_PREFIX;
 124 }
 125
 126 // content::WebContentsObserver implementation.
 127 void ExtensionViewGuest::DidCommitProvisionalLoadForFrame(
 128     content::RenderFrameHost* render_frame_host,
 129     const GURL& url,
 130     ui::PageTransition transition_type) {
 131   if (render_frame_host->GetParent())
 132     return;
 133
 134   view_page_ = url;
 135
 136   // Gets chrome-extension://extensionid/ prefix.
 137   std::string prefix = url.GetWithEmptyPath().spec();
 138   std::string relative_url = url.spec();
 139
 140   // Removes the prefix.
 141   ReplaceFirstSubstringAfterOffset(&relative_url, 0, prefix, "");
 142
 143   scoped_ptr<base::DictionaryValue> args(new base::DictionaryValue());
 144   args->SetString(guestview::kUrl, relative_url);
 145   DispatchEventToView(
 146       new GuestViewEvent(extensionview::kEventLoadCommit, args.Pass()));
 147 }
 148
 149 void ExtensionViewGuest::DidNavigateMainFrame(
 150     const content::LoadCommittedDetails& details,
 151     const content::FrameNavigateParams& params) {
 152   if (attached() && (params.url.GetOrigin() != view_page_.GetOrigin())) {
 153     bad_message::ReceivedBadMessage(web_contents()->GetRenderProcessHost(),
 154                                     bad_message::EVG_BAD_ORIGIN);
 155   }
 156 }
 157
 158 bool ExtensionViewGuest::OnMessageReceived(const IPC::Message& message) {
 159   bool handled = true;
 160   IPC_BEGIN_MESSAGE_MAP(ExtensionViewGuest, message)
 161   IPC_MESSAGE_HANDLER(ExtensionHostMsg_Request, OnRequest)
 162   IPC_MESSAGE_UNHANDLED(handled = false)
 163   IPC_END_MESSAGE_MAP()
 164   return handled;
 165 }
 166
 167 // Private
 168 void ExtensionViewGuest::OnRequest(
 169     const ExtensionHostMsg_Request_Params& params) {
 170   extension_function_dispatcher_->Dispatch(params,
 171                                            web_contents()->GetRenderViewHost());
 172 }
 173
 174 void ExtensionViewGuest::ApplyAttributes(const base::DictionaryValue& params) {
 175   std::string src;
 176   params.GetString(extensionview::kAttributeSrc, &src);
 177   NavigateGuest(src, false /* force_navigation */);
 178 }
 179
 180 }  // namespace extensions