gecko-dev/netwerk/protocol/websocket/nsIWebSocketChannel.idl

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Mozilla.
 *
 * The Initial Developer of the Original Code is
 * Mozilla Foundation.
 * Portions created by the Initial Developer are Copyright (C) 2011
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Patrick McManus <mcmanus@ducksong.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
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 * the provisions above, a recipient may use your version of this file under
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 * ***** END LICENSE BLOCK ***** */

interface nsIURI;
interface nsIInterfaceRequestor;
interface nsILoadGroup;
interface nsIWebSocketListener;
interface nsIInputStream;

#include "nsISupports.idl"

/** 
 *  You probably want nsI{Moz}WebSocket.idl
 */
[uuid(ace34548-6dde-4570-b0b4-451aa6a877e0)]
interface nsIWebSocketChannel : nsISupports
{
    /**
     * The original URI used to construct the protocol connection. This is used
     * in the case of a redirect or URI "resolution" (e.g. resolving a
     * resource: URI to a file: URI) so that the original pre-redirect
     * URI can still be obtained.  This is never null.
     */
    readonly attribute nsIURI originalURI;

    /**
     * The readonly URI corresponding to the protocol connection after any
     * redirections are completed.
     */
    readonly attribute nsIURI URI;

    /**
     * The notification callbacks for authorization, etc..
     */
    attribute nsIInterfaceRequestor notificationCallbacks;

    /**
     * Transport-level security information (if any)
     */
    readonly attribute nsISupports securityInfo;

    /**
     * The load group of the websockets code.
     */
    attribute nsILoadGroup loadGroup;

    /**
     * Sec-Websocket-Protocol value
     */
    attribute ACString protocol;

    /**
     * Sec-Websocket-Extensions response header value
     */
    readonly attribute ACString extensions;

    /**
     * Asynchronously open the websocket connection.  Received messages are fed
     * to the socket listener as they arrive.  The socket listener's methods
     * are called on the thread that calls asyncOpen and are not called until
     * after asyncOpen returns.  If asyncOpen returns successfully, the
     * protocol implementation promises to call at least onStart and onStop of
     * the listener.
     *
     * NOTE: Implementations should throw NS_ERROR_ALREADY_OPENED if the
     * websocket connection is reopened.
     *
     * @param aURI the uri of the websocket protocol - may be redirected
     * @param aOrigin the uri of the originating resource
     * @param aListener the nsIWebSocketListener implementation
     * @param aContext an opaque parameter forwarded to aListener's methods
     */
    void asyncOpen(in nsIURI aURI,
                   in ACString aOrigin,
                   in nsIWebSocketListener aListener,
                   in nsISupports aContext);

    /*
     * Close the websocket connection for writing - no more calls to sendMsg
     * or sendBinaryMsg should be made after calling this. The listener object
     * may receive more messages if a server close has not yet been received.
     *
     * @param aCode the websocket closing handshake close code. Set to 0 if
     *        you are not providing a code.
     * @param aReason the websocket closing handshake close reason
     */
    void close(in unsigned short aCode, in AUTF8String aReason);
    
    // section 7.4.1 defines these close codes
    const unsigned short CLOSE_NORMAL               = 1000;
    const unsigned short CLOSE_GOING_AWAY           = 1001;
    const unsigned short CLOSE_PROTOCOL_ERROR       = 1002;
    const unsigned short CLOSE_UNSUPPORTED_DATATYPE = 1003;
    //  code 1004 is reserved
    const unsigned short CLOSE_NO_STATUS            = 1005;
    const unsigned short CLOSE_ABNORMAL             = 1006;
    const unsigned short CLOSE_INVALID_PAYLOAD      = 1007;
    const unsigned short CLOSE_POLICY_VIOLATION     = 1008;
    const unsigned short CLOSE_TOO_LARGE            = 1009;
    const unsigned short CLOSE_EXTENSION_MISSING    = 1010;

    // Websocket spec doesn't have equivalent of HTTP 500 code for internal
    // errors: just use CLOSE_GOING_AWAY for now
    const unsigned short CLOSE_INTERNAL_ERROR      = CLOSE_GOING_AWAY;

    /**
     * Use to send text message down the connection to WebSocket peer.
     *
     * @param aMsg the utf8 string to send
     */
    void sendMsg(in AUTF8String aMsg);

    /**
     * Use to send binary message down the connection to WebSocket peer.
     *
     * @param aMsg the data to send
     */
    void sendBinaryMsg(in ACString aMsg);

    /** 
     * Use to send a binary stream (Blob) to Websocket peer.
     *
     * @param aStream The input stream to be sent.  
     */
    void sendBinaryStream(in nsIInputStream aStream, 
                          in unsigned long length);
};