mirror of
https://bitbucket.org/chromiumembedded/cef
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437 lines
17 KiB
C++
437 lines
17 KiB
C++
// Copyright 2015 The Chromium Embedded Framework Authors.
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// Portions copyright 2014 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "libcef/browser/extensions/extension_system.h"
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#include <string>
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#include "libcef/browser/extensions/pdf_extension_util.h"
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#include "libcef/common/extensions/extensions_util.h"
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#include "base/command_line.h"
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#include "base/files/file_path.h"
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#include "base/files/file_util.h"
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#include "base/json/json_string_value_serializer.h"
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#include "base/path_service.h"
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#include "base/strings/string_tokenizer.h"
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#include "base/strings/utf_string_conversions.h"
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#include "base/threading/thread_restrictions.h"
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#include "chrome/common/chrome_paths.h"
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#include "components/crx_file/id_util.h"
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#include "content/public/browser/browser_context.h"
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#include "content/public/browser/browser_thread.h"
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#include "content/public/browser/notification_details.h"
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#include "content/public/browser/notification_service.h"
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#include "content/public/browser/notification_source.h"
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#include "content/public/browser/plugin_service.h"
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#include "content/public/browser/render_process_host.h"
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#include "extensions/browser/api/app_runtime/app_runtime_api.h"
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#include "extensions/browser/extension_prefs.h"
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#include "extensions/browser/extension_registry.h"
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#include "extensions/browser/info_map.h"
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#include "extensions/browser/notification_types.h"
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#include "extensions/browser/quota_service.h"
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#include "extensions/browser/runtime_data.h"
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#include "extensions/common/constants.h"
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#include "extensions/common/extension_messages.h"
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#include "extensions/common/file_util.h"
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#include "extensions/common/manifest_constants.h"
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#include "extensions/common/manifest_handlers/mime_types_handler.h"
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#include "extensions/common/switches.h"
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#include "net/base/mime_util.h"
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using content::BrowserContext;
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using content::BrowserThread;
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namespace extensions {
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namespace {
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std::string GenerateId(const base::DictionaryValue* manifest,
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const base::FilePath& path) {
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std::string raw_key;
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std::string id_input;
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CHECK(manifest->GetString(manifest_keys::kPublicKey, &raw_key));
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CHECK(Extension::ParsePEMKeyBytes(raw_key, &id_input));
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std::string id = crx_file::id_util::GenerateId(id_input);
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return id;
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}
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// Implementation based on ComponentLoader::ParseManifest.
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base::DictionaryValue* ParseManifest(
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const std::string& manifest_contents) {
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JSONStringValueDeserializer deserializer(manifest_contents);
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scoped_ptr<base::Value> manifest(deserializer.Deserialize(NULL, NULL));
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if (!manifest.get() || !manifest->IsType(base::Value::TYPE_DICTIONARY)) {
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LOG(ERROR) << "Failed to parse extension manifest.";
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return NULL;
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}
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// Transfer ownership to the caller.
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return static_cast<base::DictionaryValue*>(manifest.release());
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}
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} // namespace
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CefExtensionSystem::CefExtensionSystem(BrowserContext* browser_context)
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: browser_context_(browser_context),
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registry_(ExtensionRegistry::Get(browser_context)) {
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}
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CefExtensionSystem::~CefExtensionSystem() {
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}
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void CefExtensionSystem::Init() {
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// There's complexity here related to the ordering of message delivery. For
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// an extension to load correctly both the ExtensionMsg_Loaded and
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// ExtensionMsg_ActivateExtension messages must be sent. These messages are
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// currently sent by RendererStartupHelper, ExtensionWebContentsObserver, and
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// this class. ExtensionMsg_Loaded is handled by Dispatcher::OnLoaded and adds
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// the extension to |extensions_|. ExtensionMsg_ActivateExtension is handled
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// by Dispatcher::OnActivateExtension and adds the extension to
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// |active_extension_ids_|. If these messages are not sent correctly then
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// ScriptContextSet::Register called from Dispatcher::DidCreateScriptContext
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// will classify the extension incorrectly and API bindings will not be added.
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// Inform the rest of the extensions system to start.
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ready_.Signal();
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content::NotificationService::current()->Notify(
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NOTIFICATION_EXTENSIONS_READY_DEPRECATED,
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content::Source<BrowserContext>(browser_context_),
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content::NotificationService::NoDetails());
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// Add the built-in PDF extension. PDF loading works as follows:
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// 1. PDF PPAPI plugin is registered to handle kPDFPluginOutOfProcessMimeType
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// in libcef/common/content_client.cc ComputeBuiltInPlugins.
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// 2. PDF extension is registered with the below call to AddExtension.
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// 3. A page requests a plugin to handle "application/pdf" mime type. This
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// results in a call to CefContentRendererClient::OverrideCreatePlugin
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// in the renderer process which calls CefContentRendererClient::
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// CreateBrowserPluginDelegate indirectly to create a
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// MimeHandlerViewContainer.
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// 4. CefResourceDispatcherHostDelegate::ShouldInterceptResourceAsStream
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// intercepts the PDF load in the browser process, associates the load with
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// the PDF extension and makes the PDF file contents available to the
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// extension via the Stream API.
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// 5. A MimeHandlerViewGuest and CefMimeHandlerViewGuestDelegate is created in
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// the browser process.
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// 6. MimeHandlerViewGuest navigates to the PDF extension URL.
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// 7. PDF extension resources are provided from bundle via
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// CefExtensionsBrowserClient::MaybeCreateResourceBundleRequestJob and
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// CefComponentExtensionResourceManager.
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// 8. The PDF extension communicates via the chrome.mimeHandlerPrivate Mojo
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// API which is implemented as described in
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// libcef/common/extensions/api/README.txt.
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// 9. The PDF extension requests a plugin to handle
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// kPDFPluginOutOfProcessMimeType which loads the PDF PPAPI plugin.
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// 10.Routing of print-related commands are handled by ChromePDFPrintClient
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// and CefPrintWebViewHelperDelegate in the renderer process.
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if (PdfExtensionEnabled()) {
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AddExtension(pdf_extension_util::GetManifest(),
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base::FilePath(FILE_PATH_LITERAL("pdf")));
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}
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}
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// Implementation based on ComponentLoader::Add.
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const Extension* CefExtensionSystem::AddExtension(
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const std::string& manifest_contents,
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const base::FilePath& root_directory) {
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base::DictionaryValue* manifest = ParseManifest(manifest_contents);
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if (!manifest)
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return NULL;
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ComponentExtensionInfo info(manifest, root_directory);
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const Extension* extension = LoadExtension(info);
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delete manifest;
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return extension;
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}
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// Implementation based on ExtensionService::RemoveComponentExtension.
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void CefExtensionSystem::RemoveExtension(const std::string& extension_id) {
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scoped_refptr<const Extension> extension(
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registry_->enabled_extensions().GetByID(extension_id));
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UnloadExtension(extension_id, UnloadedExtensionInfo::REASON_UNINSTALL);
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if (extension.get()) {
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registry_->TriggerOnUninstalled(
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extension.get(), extensions::UNINSTALL_REASON_COMPONENT_REMOVED);
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}
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}
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void CefExtensionSystem::Shutdown() {
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}
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void CefExtensionSystem::InitForRegularProfile(bool extensions_enabled) {
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runtime_data_.reset(new RuntimeData(registry_));
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quota_service_.reset(new QuotaService);
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}
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ExtensionService* CefExtensionSystem::extension_service() {
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return nullptr;
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}
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RuntimeData* CefExtensionSystem::runtime_data() {
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return runtime_data_.get();
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}
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ManagementPolicy* CefExtensionSystem::management_policy() {
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return nullptr;
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}
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SharedUserScriptMaster* CefExtensionSystem::shared_user_script_master() {
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return nullptr;
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}
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StateStore* CefExtensionSystem::state_store() {
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return nullptr;
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}
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StateStore* CefExtensionSystem::rules_store() {
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return nullptr;
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}
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InfoMap* CefExtensionSystem::info_map() {
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if (!info_map_.get())
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info_map_ = new InfoMap;
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return info_map_.get();
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}
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QuotaService* CefExtensionSystem::quota_service() {
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return quota_service_.get();
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}
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// Implementation based on
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// ExtensionSystemImpl::RegisterExtensionWithRequestContexts.
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void CefExtensionSystem::RegisterExtensionWithRequestContexts(
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const Extension* extension) {
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// TODO(extensions): The |incognito_enabled| value should be set based on
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// manifest settings.
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BrowserThread::PostTask(
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BrowserThread::IO,
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FROM_HERE,
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base::Bind(&InfoMap::AddExtension,
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info_map(),
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make_scoped_refptr(extension),
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base::Time::Now(),
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true, // incognito_enabled
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false)); // notifications_disabled
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}
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// Implementation based on
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// ExtensionSystemImpl::UnregisterExtensionWithRequestContexts.
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void CefExtensionSystem::UnregisterExtensionWithRequestContexts(
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const std::string& extension_id,
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const UnloadedExtensionInfo::Reason reason) {
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BrowserThread::PostTask(
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BrowserThread::IO,
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FROM_HERE,
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base::Bind(&InfoMap::RemoveExtension, info_map(), extension_id, reason));
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}
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const OneShotEvent& CefExtensionSystem::ready() const {
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return ready_;
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}
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ContentVerifier* CefExtensionSystem::content_verifier() {
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return nullptr;
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}
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scoped_ptr<ExtensionSet> CefExtensionSystem::GetDependentExtensions(
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const Extension* extension) {
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return make_scoped_ptr(new ExtensionSet());
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}
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CefExtensionSystem::ComponentExtensionInfo::ComponentExtensionInfo(
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const base::DictionaryValue* manifest, const base::FilePath& directory)
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: manifest(manifest),
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root_directory(directory) {
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if (!root_directory.IsAbsolute()) {
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// This path structure is required by
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// url_request_util::MaybeCreateURLRequestResourceBundleJob.
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CHECK(PathService::Get(chrome::DIR_RESOURCES, &root_directory));
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root_directory = root_directory.Append(directory);
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}
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extension_id = GenerateId(manifest, root_directory);
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}
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// Implementation based on ComponentLoader::Load and
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// ExtensionService::AddExtension.
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const Extension* CefExtensionSystem::LoadExtension(
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const ComponentExtensionInfo& info) {
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// TODO(abarth): We should REQUIRE_MODERN_MANIFEST_VERSION once we've updated
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// our component extensions to the new manifest version.
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int flags = Extension::REQUIRE_KEY;
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std::string error;
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scoped_refptr<const Extension> extension(Extension::Create(
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info.root_directory,
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Manifest::COMPONENT,
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*info.manifest,
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flags,
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&error));
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if (!extension.get()) {
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LOG(ERROR) << error;
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return NULL;
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}
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CHECK_EQ(info.extension_id, extension->id()) << extension->name();
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registry_->AddEnabled(extension.get());
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NotifyExtensionLoaded(extension.get());
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return extension.get();
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}
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// Implementation based on ExtensionService::UnloadExtension.
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void CefExtensionSystem::UnloadExtension(
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const std::string& extension_id,
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UnloadedExtensionInfo::Reason reason) {
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// Make sure the extension gets deleted after we return from this function.
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int include_mask =
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ExtensionRegistry::EVERYTHING & ~ExtensionRegistry::TERMINATED;
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scoped_refptr<const Extension> extension(
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registry_->GetExtensionById(extension_id, include_mask));
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// This method can be called via PostTask, so the extension may have been
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// unloaded by the time this runs.
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if (!extension.get()) {
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// In case the extension may have crashed/uninstalled. Allow the profile to
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// clean up its RequestContexts.
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UnregisterExtensionWithRequestContexts(extension_id, reason);
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return;
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}
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if (registry_->disabled_extensions().Contains(extension->id())) {
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registry_->RemoveDisabled(extension->id());
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// Make sure the profile cleans up its RequestContexts when an already
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// disabled extension is unloaded (since they are also tracking the disabled
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// extensions).
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UnregisterExtensionWithRequestContexts(extension_id, reason);
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// Don't send the unloaded notification. It was sent when the extension
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// was disabled.
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} else {
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// Remove the extension from the enabled list.
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registry_->RemoveEnabled(extension->id());
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NotifyExtensionUnloaded(extension.get(), reason);
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}
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content::NotificationService::current()->Notify(
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extensions::NOTIFICATION_EXTENSION_REMOVED,
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content::Source<content::BrowserContext>(browser_context_),
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content::Details<const Extension>(extension.get()));
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}
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// Implementation based on ExtensionService::NotifyExtensionLoaded.
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void CefExtensionSystem::NotifyExtensionLoaded(const Extension* extension) {
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// The URLRequestContexts need to be first to know that the extension
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// was loaded, otherwise a race can arise where a renderer that is created
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// for the extension may try to load an extension URL with an extension id
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// that the request context doesn't yet know about. The profile is responsible
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// for ensuring its URLRequestContexts appropriately discover the loaded
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// extension.
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RegisterExtensionWithRequestContexts(extension);
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// Tell renderers about the new extension, unless it's a theme (renderers
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// don't need to know about themes).
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if (!extension->is_theme()) {
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for (content::RenderProcessHost::iterator i(
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content::RenderProcessHost::AllHostsIterator());
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!i.IsAtEnd(); i.Advance()) {
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content::RenderProcessHost* host = i.GetCurrentValue();
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if (host->GetBrowserContext() == browser_context_) {
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// We don't need to include tab permisisons here, since the extension
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// was just loaded.
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std::vector<ExtensionMsg_Loaded_Params> loaded_extensions(
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1, ExtensionMsg_Loaded_Params(extension,
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false /* no tab permissions */));
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host->Send(
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new ExtensionMsg_Loaded(loaded_extensions));
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}
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}
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}
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// Tell subsystems that use the EXTENSION_LOADED notification about the new
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// extension.
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//
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// NOTE: It is important that this happen after notifying the renderers about
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// the new extensions so that if we navigate to an extension URL in
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// ExtensionRegistryObserver::OnLoaded or
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// NOTIFICATION_EXTENSION_LOADED_DEPRECATED, the
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// renderer is guaranteed to know about it.
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registry_->TriggerOnLoaded(extension);
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// Register plugins included with the extension.
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// Implementation based on PluginManager::OnExtensionLoaded.
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const MimeTypesHandler* handler = MimeTypesHandler::GetHandler(extension);
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if (handler && !handler->handler_url().empty()) {
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content::WebPluginInfo info;
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info.type = content::WebPluginInfo::PLUGIN_TYPE_BROWSER_PLUGIN;
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info.name = base::UTF8ToUTF16(extension->name());
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info.path = base::FilePath::FromUTF8Unsafe(extension->url().spec());
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for (std::set<std::string>::const_iterator mime_type =
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handler->mime_type_set().begin();
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mime_type != handler->mime_type_set().end(); ++mime_type) {
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content::WebPluginMimeType mime_type_info;
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mime_type_info.mime_type = *mime_type;
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base::FilePath::StringType file_extension;
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if (net::GetPreferredExtensionForMimeType(*mime_type, &file_extension)) {
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mime_type_info.file_extensions.push_back(
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base::FilePath(file_extension).AsUTF8Unsafe());
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}
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info.mime_types.push_back(mime_type_info);
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}
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content::PluginService* plugin_service =
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content::PluginService::GetInstance();
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plugin_service->RefreshPlugins();
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plugin_service->RegisterInternalPlugin(info, true);
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}
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content::NotificationService::current()->Notify(
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extensions::NOTIFICATION_EXTENSION_LOADED_DEPRECATED,
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content::Source<content::BrowserContext>(browser_context_),
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content::Details<const Extension>(extension));
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}
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// Implementation based on ExtensionService::NotifyExtensionUnloaded.
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void CefExtensionSystem::NotifyExtensionUnloaded(
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const Extension* extension,
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UnloadedExtensionInfo::Reason reason) {
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UnloadedExtensionInfo details(extension, reason);
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// Unregister plugins included with the extension.
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// Implementation based on PluginManager::OnExtensionUnloaded.
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const MimeTypesHandler* handler = MimeTypesHandler::GetHandler(extension);
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if (handler && !handler->handler_url().empty()) {
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base::FilePath path =
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base::FilePath::FromUTF8Unsafe(extension->url().spec());
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content::PluginService* plugin_service =
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content::PluginService::GetInstance();
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plugin_service->UnregisterInternalPlugin(path);
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plugin_service->ForcePluginShutdown(path);
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plugin_service->RefreshPlugins();
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}
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registry_->TriggerOnUnloaded(extension, reason);
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content::NotificationService::current()->Notify(
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extensions::NOTIFICATION_EXTENSION_UNLOADED_DEPRECATED,
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content::Source<content::BrowserContext>(browser_context_),
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content::Details<UnloadedExtensionInfo>(&details));
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for (content::RenderProcessHost::iterator i(
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content::RenderProcessHost::AllHostsIterator());
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!i.IsAtEnd(); i.Advance()) {
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content::RenderProcessHost* host = i.GetCurrentValue();
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if (host->GetBrowserContext() == browser_context_)
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host->Send(new ExtensionMsg_Unloaded(extension->id()));
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}
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UnregisterExtensionWithRequestContexts(extension->id(), reason);
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}
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} // namespace extensions
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