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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* vim: set sw=4 ts=4 et tw=80 : */
/* 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"
/**
* nsIWebSocketListener: passed to nsIWebSocketChannel::AsyncOpen. Receives
* websocket traffic events as they arrive.
*/
[scriptable, uuid(d74c96b2-65b3-4e39-9e39-c577de5d7a73)]
interface nsIWebSocketListener : nsISupports
{
/**
* Called to signify the establishment of the message stream.
*
* Unlike most other networking channels (which use nsIRequestObserver
* instead of this class), we do not guarantee that OnStart is always
* called: OnStop is called without calling this function if errors occur
* during connection setup. If the websocket connection is successful,
* OnStart will be called before any other calls to this API.
*
* @param aContext user defined context
*/
[must_use] void onStart(in nsISupports aContext);
/**
* Called to signify the completion of the message stream.
* OnStop is the final notification the listener will receive and it
* completes the WebSocket connection: after it returns the
* nsIWebSocketChannel will release its reference to the listener.
*
* Note: this event can be received in error cases even if
* nsIWebSocketChannel::Close() has not been called.
*
* @param aContext user defined context
* @param aStatusCode reason for stopping (NS_OK if completed successfully)
*/
[must_use] void onStop(in nsISupports aContext,
in nsresult aStatusCode);
/**
* Called to deliver text message.
*
* @param aContext user defined context
* @param aMsg the message data
*/
[must_use] void onMessageAvailable(in nsISupports aContext,
in AUTF8String aMsg);
/**
* Called to deliver binary message.
*
* @param aContext user defined context
* @param aMsg the message data
*/
[must_use] void onBinaryMessageAvailable(in nsISupports aContext,
in ACString aMsg);
/**
* Called to acknowledge message sent via sendMsg() or sendBinaryMsg.
*
* @param aContext user defined context
* @param aSize number of bytes placed in OS send buffer
*/
[must_use] void onAcknowledge(in nsISupports aContext, in uint32_t aSize);
/**
* Called to inform receipt of WebSocket Close message from server.
* In the case of errors onStop() can be called without ever
* receiving server close.
*
* No additional messages through onMessageAvailable(),
* onBinaryMessageAvailable() or onAcknowledge() will be delievered
* to the listener after onServerClose(), though outgoing messages can still
* be sent through the nsIWebSocketChannel connection.
*
* @param aContext user defined context
* @param aCode the websocket closing handshake close code.
* @param aReason the websocket closing handshake close reason
*/
[must_use] void onServerClose(in nsISupports aContext,
in unsigned short aCode,
in AUTF8String aReason);
/**
* Called to inform an error is happened. The connection will be closed
* when this is called.
*/
[must_use] void OnError();
};
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