/* -*- 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 nsIProtocolProxyService;
interface nsIProxyInfo;
interface nsIURI;

/**
 * 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.
 */
[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 aProxyService
   *        A reference to the Protocol Proxy Service.  This is passed so that
   *        implementations may easily access methods such as newProxyInfo.
   * @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.
   *
   * @return 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 aProxyService.newProxyInfo to
   *         construct nsIProxyInfo objects.
   */
  nsIProxyInfo applyFilter(in nsIProtocolProxyService aProxyService,
                           in nsIURI aURI, in nsIProxyInfo aProxy);
};
