src/chrome/browser/extensions/api/declarative/rules_registry_service.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 "chrome/browser/extensions/api/declarative/rules_registry_service.h"
   6
   7 #include "base/bind.h"
   8 #include "base/lazy_instance.h"
   9 #include "base/logging.h"
  10 #include "base/memory/scoped_ptr.h"
  11 #include "chrome/browser/chrome_notification_types.h"
  12 #include "chrome/browser/extensions/api/declarative/rules_cache_delegate.h"
  13 #include "chrome/browser/extensions/api/declarative_content/content_rules_registry.h"
  14 #include "chrome/browser/extensions/api/declarative_webrequest/webrequest_constants.h"
  15 #include "chrome/browser/extensions/api/declarative_webrequest/webrequest_rules_registry.h"
  16 #include "chrome/browser/extensions/api/web_request/web_request_api.h"
  17 #include "chrome/browser/profiles/profile.h"
  18 #include "content/public/browser/browser_thread.h"
  19 #include "content/public/browser/notification_details.h"
  20 #include "content/public/browser/notification_service.h"
  21 #include "content/public/browser/notification_source.h"
  22 #include "content/public/browser/render_process_host.h"
  23 #include "extensions/browser/extension_registry.h"
  24 #include "extensions/common/extension.h"
  25
  26 namespace extensions {
  27
  28 namespace {
  29
  30 // Registers |web_request_rules_registry| on the IO thread.
  31 void RegisterToExtensionWebRequestEventRouterOnIO(
  32     void* profile,
  33     const RulesRegistryService::WebViewKey& webview_key,
  34     scoped_refptr<WebRequestRulesRegistry> web_request_rules_registry) {
  35   ExtensionWebRequestEventRouter::GetInstance()->RegisterRulesRegistry(
  36       profile, webview_key, web_request_rules_registry);
  37 }
  38
  39 bool IsWebView(const RulesRegistryService::WebViewKey& webview_key) {
  40   return webview_key.embedder_process_id && webview_key.webview_instance_id;
  41 }
  42
  43 }  // namespace
  44
  45 RulesRegistryService::RulesRegistryService(content::BrowserContext* context)
  46     : content_rules_registry_(NULL),
  47       extension_registry_observer_(this),
  48       profile_(Profile::FromBrowserContext(context)) {
  49   if (profile_) {
  50     extension_registry_observer_.Add(ExtensionRegistry::Get(profile_));
  51     registrar_.Add(
  52         this, content::NOTIFICATION_RENDERER_PROCESS_TERMINATED,
  53         content::NotificationService::AllBrowserContextsAndSources());
  54     EnsureDefaultRulesRegistriesRegistered(WebViewKey(0, 0));
  55   }
  56 }
  57
  58 RulesRegistryService::~RulesRegistryService() {}
  59
  60 void RulesRegistryService::EnsureDefaultRulesRegistriesRegistered(
  61     const WebViewKey& webview_key) {
  62   if (!profile_)
  63     return;
  64
  65   RulesRegistryKey key(declarative_webrequest_constants::kOnRequest,
  66                        webview_key);
  67   // If we can find the key in the |rule_registries_| then we have already
  68   // installed the default registries.
  69   if (ContainsKey(rule_registries_, key))
  70     return;
  71
  72
  73   RulesCacheDelegate* web_request_cache_delegate = NULL;
  74   if (!IsWebView(webview_key)) {
  75     web_request_cache_delegate =
  76         new RulesCacheDelegate(true /*log_storage_init_delay*/);
  77     cache_delegates_.push_back(web_request_cache_delegate);
  78   }
  79   scoped_refptr<WebRequestRulesRegistry> web_request_rules_registry(
  80       new WebRequestRulesRegistry(profile_,
  81                                   web_request_cache_delegate,
  82                                   webview_key));
  83
  84   RegisterRulesRegistry(web_request_rules_registry);
  85   content::BrowserThread::PostTask(
  86       content::BrowserThread::IO, FROM_HERE,
  87       base::Bind(&RegisterToExtensionWebRequestEventRouterOnIO,
  88           profile_, webview_key, web_request_rules_registry));
  89
  90   // Only create a ContentRulesRegistry for regular pages and not webviews.
  91   if (!IsWebView(webview_key)) {
  92     RulesCacheDelegate* content_rules_cache_delegate =
  93         new RulesCacheDelegate(false /*log_storage_init_delay*/);
  94     cache_delegates_.push_back(content_rules_cache_delegate);
  95     scoped_refptr<ContentRulesRegistry> content_rules_registry(
  96         new ContentRulesRegistry(profile_, content_rules_cache_delegate));
  97     RegisterRulesRegistry(content_rules_registry);
  98     content_rules_registry_ = content_rules_registry.get();
  99   }
 100 }
 101
 102 void RulesRegistryService::Shutdown() {
 103   // Release the references to all registries. This would happen soon during
 104   // destruction of |*this|, but we need the ExtensionWebRequestEventRouter to
 105   // be the last to reference the WebRequestRulesRegistry objects, so that
 106   // the posted task below causes their destruction on the IO thread, not on UI
 107   // where the destruction of |*this| takes place.
 108   // TODO(vabr): Remove once http://crbug.com/218451#c6 gets addressed.
 109   rule_registries_.clear();
 110   content::BrowserThread::PostTask(
 111       content::BrowserThread::IO, FROM_HERE,
 112       base::Bind(&RegisterToExtensionWebRequestEventRouterOnIO,
 113           profile_, WebViewKey(0, 0),
 114           scoped_refptr<WebRequestRulesRegistry>(NULL)));
 115 }
 116
 117 static base::LazyInstance<BrowserContextKeyedAPIFactory<RulesRegistryService> >
 118     g_factory = LAZY_INSTANCE_INITIALIZER;
 119
 120 // static
 121 BrowserContextKeyedAPIFactory<RulesRegistryService>*
 122 RulesRegistryService::GetFactoryInstance() {
 123   return g_factory.Pointer();
 124 }
 125
 126 // static
 127 RulesRegistryService* RulesRegistryService::Get(
 128     content::BrowserContext* context) {
 129   return BrowserContextKeyedAPIFactory<RulesRegistryService>::Get(context);
 130 }
 131
 132 void RulesRegistryService::RegisterRulesRegistry(
 133     scoped_refptr<RulesRegistry> rule_registry) {
 134   const std::string event_name(rule_registry->event_name());
 135   RulesRegistryKey key(event_name, rule_registry->webview_key());
 136   DCHECK(rule_registries_.find(key) == rule_registries_.end());
 137   rule_registries_[key] = rule_registry;
 138 }
 139
 140 scoped_refptr<RulesRegistry> RulesRegistryService::GetRulesRegistry(
 141     const WebViewKey& webview_key,
 142     const std::string& event_name) {
 143   EnsureDefaultRulesRegistriesRegistered(webview_key);
 144
 145   RulesRegistryKey key(event_name, webview_key);
 146   RulesRegistryMap::const_iterator i = rule_registries_.find(key);
 147   if (i == rule_registries_.end())
 148     return scoped_refptr<RulesRegistry>();
 149   return i->second;
 150 }
 151
 152 void RulesRegistryService::RemoveWebViewRulesRegistries(int process_id) {
 153   DCHECK_NE(0, process_id);
 154
 155   std::set<RulesRegistryKey> registries_to_delete;
 156   for (RulesRegistryMap::iterator it = rule_registries_.begin();
 157        it != rule_registries_.end(); ++it) {
 158     const RulesRegistryKey& key = it->first;
 159     const WebViewKey& webview_key = key.webview_key;
 160     int embedder_process_id = webview_key.embedder_process_id;
 161     // |process_id| will always be non-zero.
 162     // |embedder_process_id| will only be non-zero if the key corresponds to a
 163     // webview registry.
 164     // Thus, |embedder_process_id| == |process_id| ==> the process ID is a
 165     // webview embedder.
 166     if (embedder_process_id != process_id)
 167       continue;
 168
 169     // Modifying the container while iterating is bad so we'll save the keys we
 170     // wish to delete in another container, and delete them in another loop.
 171     registries_to_delete.insert(key);
 172   }
 173   for (std::set<RulesRegistryKey>::iterator it = registries_to_delete.begin();
 174        it != registries_to_delete.end(); ++it) {
 175     rule_registries_.erase(*it);
 176   }
 177 }
 178
 179 void RulesRegistryService::SimulateExtensionUninstalled(
 180     const std::string& extension_id) {
 181   NotifyRegistriesHelper(&RulesRegistry::OnExtensionUninstalled, extension_id);
 182 }
 183
 184 void RulesRegistryService::NotifyRegistriesHelper(
 185     void (RulesRegistry::*notification_callback)(const std::string&),
 186     const std::string& extension_id) {
 187   RulesRegistryMap::iterator i;
 188   for (i = rule_registries_.begin(); i != rule_registries_.end(); ++i) {
 189     scoped_refptr<RulesRegistry> registry = i->second;
 190     if (content::BrowserThread::CurrentlyOn(registry->owner_thread())) {
 191       (registry->*notification_callback)(extension_id);
 192     } else {
 193       content::BrowserThread::PostTask(
 194           registry->owner_thread(),
 195           FROM_HERE,
 196           base::Bind(notification_callback, registry, extension_id));
 197     }
 198   }
 199 }
 200
 201 void RulesRegistryService::OnExtensionLoaded(
 202     content::BrowserContext* browser_context,
 203     const Extension* extension) {
 204   NotifyRegistriesHelper(&RulesRegistry::OnExtensionLoaded, extension->id());
 205 }
 206
 207 void RulesRegistryService::OnExtensionUnloaded(
 208     content::BrowserContext* browser_context,
 209     const Extension* extension,
 210     UnloadedExtensionInfo::Reason reason) {
 211   NotifyRegistriesHelper(&RulesRegistry::OnExtensionUnloaded, extension->id());
 212 }
 213
 214 void RulesRegistryService::OnExtensionUninstalled(
 215     content::BrowserContext* browser_context,
 216     const Extension* extension,
 217     extensions::UninstallReason reason) {
 218   NotifyRegistriesHelper(&RulesRegistry::OnExtensionUninstalled,
 219                          extension->id());
 220 }
 221
 222 void RulesRegistryService::Observe(
 223     int type,
 224     const content::NotificationSource& source,
 225     const content::NotificationDetails& details) {
 226   DCHECK_EQ(content::NOTIFICATION_RENDERER_PROCESS_TERMINATED, type);
 227
 228   content::RenderProcessHost* process =
 229       content::Source<content::RenderProcessHost>(source).ptr();
 230   RemoveWebViewRulesRegistries(process->GetID());
 231 }
 232
 233 }  // namespace extensions