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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/extensions/api/declarative/rules_registry_service.h"
#include "base/bind.h"
#include "base/lazy_instance.h"
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "chrome/browser/chrome_notification_types.h"
#include "chrome/browser/extensions/api/declarative/rules_cache_delegate.h"
#include "chrome/browser/extensions/api/declarative_content/content_rules_registry.h"
#include "chrome/browser/extensions/api/declarative_webrequest/webrequest_constants.h"
#include "chrome/browser/extensions/api/declarative_webrequest/webrequest_rules_registry.h"
#include "chrome/browser/extensions/api/web_request/web_request_api.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/notification_details.h"
#include "content/public/browser/notification_service.h"
#include "content/public/browser/notification_source.h"
#include "content/public/browser/render_process_host.h"
#include "extensions/common/extension.h"
namespace extensions {
namespace {
// Registers |web_request_rules_registry| on the IO thread.
void RegisterToExtensionWebRequestEventRouterOnIO(
void* profile,
const RulesRegistryService::WebViewKey& webview_key,
scoped_refptr<WebRequestRulesRegistry> web_request_rules_registry) {
ExtensionWebRequestEventRouter::GetInstance()->RegisterRulesRegistry(
profile, webview_key, web_request_rules_registry);
}
bool IsWebView(const RulesRegistryService::WebViewKey& webview_key) {
return webview_key.embedder_process_id && webview_key.webview_instance_id;
}
} // namespace
RulesRegistryService::RulesRegistryService(Profile* profile)
: content_rules_registry_(NULL),
profile_(profile) {
if (profile) {
registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_UNLOADED,
content::Source<Profile>(profile->GetOriginalProfile()));
registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_UNINSTALLED,
content::Source<Profile>(profile->GetOriginalProfile()));
registrar_.Add(this,
chrome::NOTIFICATION_EXTENSION_LOADED,
content::Source<Profile>(profile_->GetOriginalProfile()));
registrar_.Add(
this, content::NOTIFICATION_RENDERER_PROCESS_TERMINATED,
content::NotificationService::AllBrowserContextsAndSources());
EnsureDefaultRulesRegistriesRegistered(WebViewKey(0, 0));
}
}
RulesRegistryService::~RulesRegistryService() {}
void RulesRegistryService::EnsureDefaultRulesRegistriesRegistered(
const WebViewKey& webview_key) {
if (!profile_)
return;
RulesRegistryKey key(declarative_webrequest_constants::kOnRequest,
webview_key);
// If we can find the key in the |rule_registries_| then we have already
// installed the default registries.
if (ContainsKey(rule_registries_, key))
return;
RulesCacheDelegate* web_request_cache_delegate = NULL;
if (!IsWebView(webview_key)) {
web_request_cache_delegate =
new RulesCacheDelegate(true /*log_storage_init_delay*/);
cache_delegates_.push_back(web_request_cache_delegate);
}
scoped_refptr<WebRequestRulesRegistry> web_request_rules_registry(
new WebRequestRulesRegistry(profile_,
web_request_cache_delegate,
webview_key));
RegisterRulesRegistry(web_request_rules_registry);
content::BrowserThread::PostTask(
content::BrowserThread::IO, FROM_HERE,
base::Bind(&RegisterToExtensionWebRequestEventRouterOnIO,
profile_, webview_key, web_request_rules_registry));
#if defined(ENABLE_EXTENSIONS)
// Only create a ContentRulesRegistry for regular pages and not webviews.
if (!IsWebView(webview_key)) {
RulesCacheDelegate* content_rules_cache_delegate =
new RulesCacheDelegate(false /*log_storage_init_delay*/);
cache_delegates_.push_back(content_rules_cache_delegate);
scoped_refptr<ContentRulesRegistry> content_rules_registry(
new ContentRulesRegistry(profile_, content_rules_cache_delegate));
RegisterRulesRegistry(content_rules_registry);
content_rules_registry_ = content_rules_registry.get();
}
#endif // defined(ENABLE_EXTENSIONS)
}
void RulesRegistryService::Shutdown() {
// Release the references to all registries. This would happen soon during
// destruction of |*this|, but we need the ExtensionWebRequestEventRouter to
// be the last to reference the WebRequestRulesRegistry objects, so that
// the posted task below causes their destruction on the IO thread, not on UI
// where the destruction of |*this| takes place.
// TODO(vabr): Remove once http://crbug.com/218451#c6 gets addressed.
rule_registries_.clear();
content::BrowserThread::PostTask(
content::BrowserThread::IO, FROM_HERE,
base::Bind(&RegisterToExtensionWebRequestEventRouterOnIO,
profile_, WebViewKey(0, 0),
scoped_refptr<WebRequestRulesRegistry>(NULL)));
}
static base::LazyInstance<ProfileKeyedAPIFactory<RulesRegistryService> >
g_factory = LAZY_INSTANCE_INITIALIZER;
// static
ProfileKeyedAPIFactory<RulesRegistryService>*
RulesRegistryService::GetFactoryInstance() {
return g_factory.Pointer();
}
// static
RulesRegistryService* RulesRegistryService::Get(Profile* profile) {
return ProfileKeyedAPIFactory<RulesRegistryService>::GetForProfile(profile);
}
void RulesRegistryService::RegisterRulesRegistry(
scoped_refptr<RulesRegistry> rule_registry) {
const std::string event_name(rule_registry->event_name());
RulesRegistryKey key(event_name, rule_registry->webview_key());
DCHECK(rule_registries_.find(key) == rule_registries_.end());
rule_registries_[key] = rule_registry;
}
scoped_refptr<RulesRegistry> RulesRegistryService::GetRulesRegistry(
const WebViewKey& webview_key,
const std::string& event_name) {
EnsureDefaultRulesRegistriesRegistered(webview_key);
RulesRegistryKey key(event_name, webview_key);
RulesRegistryMap::const_iterator i = rule_registries_.find(key);
if (i == rule_registries_.end())
return scoped_refptr<RulesRegistry>();
return i->second;
}
void RulesRegistryService::RemoveWebViewRulesRegistries(int process_id) {
DCHECK_NE(0, process_id);
std::set<RulesRegistryKey> registries_to_delete;
for (RulesRegistryMap::iterator it = rule_registries_.begin();
it != rule_registries_.end(); ++it) {
const RulesRegistryKey& key = it->first;
const WebViewKey& webview_key = key.webview_key;
int embedder_process_id = webview_key.embedder_process_id;
// |process_id| will always be non-zero.
// |embedder_process_id| will only be non-zero if the key corresponds to a
// webview registry.
// Thus, |embedder_process_id| == |process_id| ==> the process ID is a
// webview embedder.
if (embedder_process_id != process_id)
continue;
// Modifying the container while iterating is bad so we'll save the keys we
// wish to delete in another container, and delete them in another loop.
registries_to_delete.insert(key);
}
for (std::set<RulesRegistryKey>::iterator it = registries_to_delete.begin();
it != registries_to_delete.end(); ++it) {
rule_registries_.erase(*it);
}
}
void RulesRegistryService::SimulateExtensionUninstalled(
const std::string& extension_id) {
NotifyRegistriesHelper(&RulesRegistry::OnExtensionUninstalled, extension_id);
}
void RulesRegistryService::NotifyRegistriesHelper(
void (RulesRegistry::*notification_callback)(const std::string&),
const std::string& extension_id) {
RulesRegistryMap::iterator i;
for (i = rule_registries_.begin(); i != rule_registries_.end(); ++i) {
scoped_refptr<RulesRegistry> registry = i->second;
if (content::BrowserThread::CurrentlyOn(registry->owner_thread())) {
(registry->*notification_callback)(extension_id);
} else {
content::BrowserThread::PostTask(
registry->owner_thread(),
FROM_HERE,
base::Bind(notification_callback, registry, extension_id));
}
}
}
void RulesRegistryService::Observe(
int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) {
switch (type) {
case chrome::NOTIFICATION_EXTENSION_UNLOADED: {
const Extension* extension =
content::Details<UnloadedExtensionInfo>(details)->extension;
NotifyRegistriesHelper(&RulesRegistry::OnExtensionUnloaded,
extension->id());
break;
}
case chrome::NOTIFICATION_EXTENSION_UNINSTALLED: {
const Extension* extension =
content::Details<const Extension>(details).ptr();
NotifyRegistriesHelper(&RulesRegistry::OnExtensionUninstalled,
extension->id());
break;
}
case chrome::NOTIFICATION_EXTENSION_LOADED: {
const Extension* extension =
content::Details<const Extension>(details).ptr();
NotifyRegistriesHelper(&RulesRegistry::OnExtensionLoaded,
extension->id());
break;
}
case content::NOTIFICATION_RENDERER_PROCESS_TERMINATED: {
content::RenderProcessHost* process =
content::Source<content::RenderProcessHost>(source).ptr();
RemoveWebViewRulesRegistries(process->GetID());
break;
}
default:
NOTREACHED();
break;
}
}
} // namespace extensions
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