C++ (Cpp) DOMStorageDBBridge::AsyncClearMatchingOriginAttributes Examples

Example #1

File: DOMStorageObserver.cpp Project: bitwiseworks/mozilla-os2

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;
    }

    nsCOMPtr<nsIPrincipal> principal;
    perm->GetPrincipal(getter_AddRefs(principal));
    if (!principal) {
      return NS_OK;
    }

    nsAutoCString originSuffix;
    BasePrincipal::Cast(principal)->OriginAttributesRef().CreateSuffix(originSuffix);

    nsCOMPtr<nsIURI> origin;
    principal->GetURI(getter_AddRefs(origin));
    if (!origin) {
      return NS_OK;
    }

    nsAutoCString host;
    origin->GetHost(host);
    if (host.IsEmpty()) {
      return NS_OK;
    }

    nsAutoCString originScope;
    rv = CreateReversedDomain(host, originScope);
    NS_ENSURE_SUCCESS(rv, rv);

    Notify("session-only-cleared", NS_ConvertUTF8toUTF16(originSuffix), originScope);

    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!
      rv = NS_EscapeURL(NS_ConvertUTF16toUTF8(aData),
                        esc_OnlyNonASCII | esc_AlwaysCopy,
                        aceDomain,
                        fallible);
      NS_ENSURE_SUCCESS(rv, rv);
    }

    nsAutoCString originScope;
    rv = CreateReversedDomain(aceDomain, originScope);
    NS_ENSURE_SUCCESS(rv, rv);

    DOMStorageDBBridge* db = DOMStorageCache::StartDatabase();
    NS_ENSURE_TRUE(db, NS_ERROR_FAILURE);

    db->AsyncClearMatchingOrigin(originScope);

    Notify("domain-data-cleared", EmptyString(), originScope);

    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 of the origins whose prefixes will match the suffix.
  if (!strcmp(aTopic, "clear-origin-attributes-data")) {
    OriginAttributesPattern pattern;
    if (!pattern.Init(nsDependentString(aData))) {
      NS_ERROR("Cannot parse origin attributes pattern");
      return NS_ERROR_FAILURE;
    }

    DOMStorageDBBridge* db = DOMStorageCache::StartDatabase();
    NS_ENSURE_TRUE(db, NS_ERROR_FAILURE);

    db->AsyncClearMatchingOriginAttributes(pattern);

    Notify("origin-attr-pattern-cleared", nsDependentString(aData));

    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;
}