docshell/base/nsIChannelClassifier.idl
author L. David Baron <dbaron@dbaron.org>
Mon, 20 Jul 2009 07:04:41 -0400
changeset 30421 aa85b2f55960cac97780c712fdf05c9e263c2fd8
parent 23790 95f52854608a043b4e62df04418f3db1f0f7f0b5
permissions -rw-r--r--
Use char16_t when available, and when it is, don't test for -fshort-wchar. (Bug 502298) r=bsmedberg

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#include "nsISupports.idl"

interface nsIChannel;

/**
 * An nsIChannelClassifier object checks a channel's URI against the
 * URI classifier service, and cancels the channel before OnStartRequest
 * if it is found on a blacklist.
 */
[scriptable, uuid(1481c5b5-9f6e-4995-8fe3-2aad5c06440d)]
interface nsIChannelClassifier : nsISupports
{
  /**
   * Checks a channel against the URI classifier service (if it exists).
   *
   * The channel will be suspended while the classifier is checked.  The
   * channel may be cancelled with an error code determined by the classifier
   * before it is resumed.
   *
   * If there is no URI classifier service, NS_ERROR_FACTORY_NOT_REGISTERED
   * will be returned.
   *
   * This method must be called immediately after AsyncOpen() has been called
   * on the channel.
   *
   * @param aChannel
   *        The channel to suspend.
   * @param aInstallListener
   *        If true, the classifier will install notification
   *        callbacks to listen for redirects.  The classifier will
   *        pass all notifications on to the channel's existing
   *        notification callbacks.
   */
  void start(in nsIChannel aChannel, in boolean aInstallListener);

  /**
   * Notify the classifier that the channel was redirected.  The new channel
   * will be suspended pending a new classifier lookup.
   *
   * @param aOldChannel
   *        The channel that's being redirected.
   * @param aNewChannel
   *        The new channel. This channel is not opened yet.
   */
  void onRedirect(in nsIChannel aOldChannel, in nsIChannel aNewChannel);

  /**
   * Cancel an existing query.  If a channel has been suspended, it will
   * be resumed.
   */
  void cancel();
};