The Tor Browser: dom/src/storage/DOMStorageObserver.cpp@6474c204b198 (annotated)

dom/src/storage/DOMStorageObserver.cpp@6474c204b198 (annotated)

dom/src/storage/DOMStorageObserver.cpp

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 #include "DOMStorageObserver.h"
 #include "DOMStorageDBThread.h"
 #include "DOMStorageCache.h"
 #include "nsIObserverService.h"
 #include "nsIURI.h"
 #include "nsIURL.h"
 #include "nsIScriptSecurityManager.h"
 #include "nsIPermission.h"
 #include "nsIIDNService.h"
 #include "mozIApplicationClearPrivateDataParams.h"
 #include "nsICookiePermission.h"
 #include "nsPrintfCString.h"
 #include "nsXULAppAPI.h"
 #include "nsEscape.h"
 #include "nsNetCID.h"
 #include "mozilla/Services.h"
 #include "nsServiceManagerUtils.h"
 namespace mozilla {
 namespace dom {
 static const char kStartupTopic[] = "sessionstore-windows-restored";
 static const uint32_t kStartupDelay = 0;
 NS_IMPL_ISUPPORTS(DOMStorageObserver,
                   nsIObserver,
                   nsISupportsWeakReference)
 DOMStorageObserver* DOMStorageObserver::sSelf = nullptr;
 extern nsresult
 CreateReversedDomain(const nsACString& aAsciiDomain, nsACString& aKey);
 // static
 nsresult
 DOMStorageObserver::Init()
 {
   if (sSelf) {
     return NS_OK;
   }
   nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
   if (!obs) {
     return NS_ERROR_UNEXPECTED;
   }
   sSelf = new DOMStorageObserver();
   NS_ADDREF(sSelf);
   // Chrome clear operations.
   obs->AddObserver(sSelf, kStartupTopic, true);
   obs->AddObserver(sSelf, "cookie-changed", true);
   obs->AddObserver(sSelf, "perm-changed", true);
   obs->AddObserver(sSelf, "browser:purge-domain-data", true);
   obs->AddObserver(sSelf, "last-pb-context-exited", true);
   obs->AddObserver(sSelf, "webapps-clear-data", true);
   // Shutdown
   obs->AddObserver(sSelf, "profile-after-change", true);
   obs->AddObserver(sSelf, "profile-before-change", true);
   obs->AddObserver(sSelf, "xpcom-shutdown", true);
   // Observe low device storage notifications.
   obs->AddObserver(sSelf, "disk-space-watcher", true);
 #ifdef DOM_STORAGE_TESTS
   // Testing
   obs->AddObserver(sSelf, "domstorage-test-flush-force", true);
   if (XRE_GetProcessType() == GeckoProcessType_Default) {
     // Only to forward to child process.
     obs->AddObserver(sSelf, "domstorage-test-flushed", true);
   }
   obs->AddObserver(sSelf, "domstorage-test-reload", true);
 #endif
   return NS_OK;
 }
 // static
 nsresult
 DOMStorageObserver::Shutdown()
 {
   if (!sSelf) {
     return NS_ERROR_NOT_INITIALIZED;
   }
   NS_RELEASE(sSelf);
   return NS_OK;
 }
 void
 DOMStorageObserver::AddSink(DOMStorageObserverSink* aObs)
 {
   mSinks.AppendElement(aObs);
 }
 void
 DOMStorageObserver::RemoveSink(DOMStorageObserverSink* aObs)
 {
   mSinks.RemoveElement(aObs);
 }
 void
 DOMStorageObserver::Notify(const char* aTopic, const nsACString& aData)
 {
   for (uint32_t i = 0; i < mSinks.Length(); ++i) {
     DOMStorageObserverSink* sink = mSinks[i];
     sink->Observe(aTopic, aData);
   }
 }
 NS_IMETHODIMP
 DOMStorageObserver::Observe(nsISupports* aSubject,
                             const char* aTopic,
                             const char16_t* aData)
 {
   nsresult rv;
   // Start the thread that opens the database.
   if (!strcmp(aTopic, kStartupTopic)) {
     nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
     obs->RemoveObserver(this, kStartupTopic);
     mDBThreadStartDelayTimer = do_CreateInstance(NS_TIMER_CONTRACTID);
     if (!mDBThreadStartDelayTimer) {
       return NS_ERROR_UNEXPECTED;
     }
     mDBThreadStartDelayTimer->Init(this, nsITimer::TYPE_ONE_SHOT, kStartupDelay);
     return NS_OK;
   }
   // Timer callback used to start the database a short timer after startup
   if (!strcmp(aTopic, NS_TIMER_CALLBACK_TOPIC)) {
     nsCOMPtr<nsITimer> timer = do_QueryInterface(aSubject);
     if (!timer) {
       return NS_ERROR_UNEXPECTED;
     }
     if (timer == mDBThreadStartDelayTimer) {
       mDBThreadStartDelayTimer = nullptr;
       DOMStorageDBBridge* db = DOMStorageCache::StartDatabase();
       NS_ENSURE_TRUE(db, NS_ERROR_FAILURE);
     }
     return NS_OK;
   }
   // Clear everything, caches + database
   if (!strcmp(aTopic, "cookie-changed")) {
     if (!NS_LITERAL_STRING("cleared").Equals(aData)) {
       return NS_OK;
     }
     DOMStorageDBBridge* db = DOMStorageCache::StartDatabase();
     NS_ENSURE_TRUE(db, NS_ERROR_FAILURE);
     db->AsyncClearAll();
     Notify("cookie-cleared");
     return NS_OK;
   }
   // Clear from caches everything that has been stored
   // while in session-only mode
   if (!strcmp(aTopic, "perm-changed")) {
     // Check for cookie permission change
     nsCOMPtr<nsIPermission> perm(do_QueryInterface(aSubject));
     if (!perm) {
       return NS_OK;
     }
     nsAutoCString type;
     perm->GetType(type);
     if (type != NS_LITERAL_CSTRING("cookie")) {
       return NS_OK;
     }
     uint32_t cap = 0;
     perm->GetCapability(&cap);
     if (!(cap & nsICookiePermission::ACCESS_SESSION) ||
         !NS_LITERAL_STRING("deleted").Equals(nsDependentString(aData))) {
       return NS_OK;
     }
     nsAutoCString host;
     perm->GetHost(host);
     if (host.IsEmpty()) {
       return NS_OK;
     }
     nsAutoCString scope;
     rv = CreateReversedDomain(host, scope);
     NS_ENSURE_SUCCESS(rv, rv);
     Notify("session-only-cleared", scope);
     return NS_OK;
   }
   // Clear everything (including so and pb data) from caches and database
   // for the gived domain and subdomains.
   if (!strcmp(aTopic, "browser:purge-domain-data")) {
     // Convert the domain name to the ACE format
     nsAutoCString aceDomain;
     nsCOMPtr<nsIIDNService> converter = do_GetService(NS_IDNSERVICE_CONTRACTID);
     if (converter) {
       rv = converter->ConvertUTF8toACE(NS_ConvertUTF16toUTF8(aData), aceDomain);
       NS_ENSURE_SUCCESS(rv, rv);
     } else {
       // In case the IDN service is not available, this is the best we can come up with!
       NS_EscapeURL(NS_ConvertUTF16toUTF8(aData),
                    esc_OnlyNonASCII | esc_AlwaysCopy,
                    aceDomain);
     }
     nsAutoCString scopePrefix;
     rv = CreateReversedDomain(aceDomain, scopePrefix);
     NS_ENSURE_SUCCESS(rv, rv);
     DOMStorageDBBridge* db = DOMStorageCache::StartDatabase();
     NS_ENSURE_TRUE(db, NS_ERROR_FAILURE);
     db->AsyncClearMatchingScope(scopePrefix);
     Notify("domain-data-cleared", scopePrefix);
     return NS_OK;
   }
   // Clear all private-browsing caches
   if (!strcmp(aTopic, "last-pb-context-exited")) {
     Notify("private-browsing-data-cleared");
     return NS_OK;
   }
   // Clear data beloging to an app.
   if (!strcmp(aTopic, "webapps-clear-data")) {
     nsCOMPtr<mozIApplicationClearPrivateDataParams> params =
       do_QueryInterface(aSubject);
     if (!params) {
       NS_ERROR("'webapps-clear-data' notification's subject should be a mozIApplicationClearPrivateDataParams");
       return NS_ERROR_UNEXPECTED;
     }
     uint32_t appId;
     bool browserOnly;
     rv = params->GetAppId(&appId);
     NS_ENSURE_SUCCESS(rv, rv);
     rv = params->GetBrowserOnly(&browserOnly);
     NS_ENSURE_SUCCESS(rv, rv);
     MOZ_ASSERT(appId != nsIScriptSecurityManager::UNKNOWN_APP_ID);
     DOMStorageDBBridge* db = DOMStorageCache::StartDatabase();
     NS_ENSURE_TRUE(db, NS_ERROR_FAILURE);
     nsAutoCString scope;
     scope.AppendInt(appId);
     scope.Append(NS_LITERAL_CSTRING(":t:"));
     db->AsyncClearMatchingScope(scope);
     Notify("app-data-cleared", scope);
     if (!browserOnly) {
       scope.Truncate();
       scope.AppendInt(appId);
       scope.Append(NS_LITERAL_CSTRING(":f:"));
       db->AsyncClearMatchingScope(scope);
       Notify("app-data-cleared", scope);
     }
     return NS_OK;
   }
   if (!strcmp(aTopic, "profile-after-change")) {
     Notify("profile-change");
     return NS_OK;
   }
   if (!strcmp(aTopic, "profile-before-change") ||
       !strcmp(aTopic, "xpcom-shutdown")) {
     rv = DOMStorageCache::StopDatabase();
     if (NS_FAILED(rv)) {
       NS_WARNING("Error while stopping DOMStorage DB background thread");
     }
     return NS_OK;
   }
   if (!strcmp(aTopic, "disk-space-watcher")) {
     if (NS_LITERAL_STRING("full").Equals(aData)) {
       Notify("low-disk-space");
     } else if (NS_LITERAL_STRING("free").Equals(aData)) {
       Notify("no-low-disk-space");
     }
     return NS_OK;
   }
 #ifdef DOM_STORAGE_TESTS
   if (!strcmp(aTopic, "domstorage-test-flush-force")) {
     DOMStorageDBBridge* db = DOMStorageCache::GetDatabase();
     if (db) {
       db->AsyncFlush();
     }
     return NS_OK;
   }
   if (!strcmp(aTopic, "domstorage-test-flushed")) {
     // Only used to propagate to IPC children
     Notify("test-flushed");
     return NS_OK;
   }
   if (!strcmp(aTopic, "domstorage-test-reload")) {
     Notify("test-reload");
     return NS_OK;
   }
 #endif
   NS_ERROR("Unexpected topic");
   return NS_ERROR_UNEXPECTED;
 }
 } // ::dom
 } // ::mozilla

The Tor Browser / annotate

dom/src/storage/DOMStorageObserver.cpp@6474c204b198 (annotated)

dom/src/storage/DOMStorageObserver.cpp