/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* 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 "nsISupports.idl"

interface nsIChannel;
interface nsIProtocolProxyService;
interface nsIProxyInfo;
interface nsIURI;

/**
 * Recipient of the result of implementers of nsIProtocolProxy(Channel)Filter
 * allowing the proxyinfo be provided asynchronously.
 */
[scriptable, uuid(009E6C3F-FB64-40C5-8093-F1495C64773E)]
interface nsIProxyProtocolFilterResult : nsISupports
{
  /**
   * It's mandatory to call this method exactly once when the applyFilter()
   * implementation doesn't throw and to not call it when applyFilter() does
   * throw.
   *
   * It's mandatory to call this method on the same thread as the call to
   * applyFilter() has been made on.
   *
   * Following the above conditions, can be called either from within
   * applyFilter() or asynchronouly any time later.
   */
  void onProxyFilterResult(in nsIProxyInfo aProxy);
};

/**
 * This interface is used to apply filters to the proxies selected for a given
 * URI.  Use nsIProtocolProxyService::registerFilter to hook up instances of
 * this interface. See also nsIProtocolProxyChannelFilter.
 */
[scriptable, uuid(f424abd3-32b4-456c-9f45-b7e3376cb0d1)]
interface nsIProtocolProxyFilter : nsISupports
{
  /**
   * This method is called to apply proxy filter rules for the given URI
   * and proxy object (or list of proxy objects).
   *
   * @param aURI
   *        The URI for which these proxy settings apply.
   * @param aProxy
   *        The proxy (or list of proxies) that would be used by default for
   *        the given URI.  This may be null.
   *
   * @param aCallback
   *        An object that the implementer is obligated to call on with
   *        the result (from within applyFilter() or asynchronously) when
   *        applyFilter didn't throw.  The argument passed to onProxyFilterResult
   *        is the proxy (or list of proxies) that should be used in place of
   *        aProxy.  This can be just be aProxy if the filter chooses not to
   *        modify the proxy.  It can also be null to indicate that a direct
   *        connection should be used.  Use nsIProtocolProxyService.newProxyInfo
   *        to construct nsIProxyInfo objects.
   */
  void applyFilter(in nsIURI aURI, in nsIProxyInfo aProxy,
                   in nsIProxyProtocolFilterResult aCallback);
};

/**
 * This interface is used to apply filters to the proxies selected for a given
 * channel.  Use nsIProtocolProxyService::registerChannelFilter to hook up instances of
 * this interface. See also nsIProtocolProxyFilter.
 */
[scriptable, uuid(245b0880-82c5-4e6e-be6d-bc586aa55a90)]
interface nsIProtocolProxyChannelFilter : nsISupports
{
  /**
   * This method is called to apply proxy filter rules for the given channel
   * and proxy object (or list of proxy objects).
   *
   * @param aChannel
   *        The channel for which these proxy settings apply.
   * @param aProxy
   *        The proxy (or list of proxies) that would be used by default for
   *        the given channel. This may be null.
   *
   * @param aCallback
   *        An object that the implementer is obligated to call on with
   *        the result (from within applyFilter() or asynchronously) when
   *        applyFilter didn't throw.  The argument passed to onProxyFilterResult
   *        is the proxy (or list of proxies) that should be used in place of
   *        aProxy.  This can be just be aProxy if the filter chooses not to
   *        modify the proxy.  It can also be null to indicate that a direct
   *        connection should be used.  Use nsIProtocolProxyService.newProxyInfo
   *        to construct nsIProxyInfo objects.
   */
  void applyFilter(in nsIChannel aChannel, in nsIProxyInfo aProxy,
                   in nsIProxyProtocolFilterResult aCallback);
};