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/*
* Copyright (c) 2013 Cisco Systems, Inc. and others. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v1.0 which accompanies this distribution,
* and is available at http://www.eclipse.org/legal/epl-v10.html
*/
package org.opendaylight.controller.sal.restconf.impl.websockets.client;
import io.netty.channel.Channel;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelPromise;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.handler.codec.http.FullHttpResponse;
import io.netty.handler.codec.http.websocketx.CloseWebSocketFrame;
import io.netty.handler.codec.http.websocketx.PongWebSocketFrame;
import io.netty.handler.codec.http.websocketx.WebSocketClientHandshaker;
import io.netty.handler.codec.http.websocketx.WebSocketFrame;
import io.netty.util.CharsetUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class WebSocketClientHandler extends SimpleChannelInboundHandler<Object> {
private static final Logger LOG = LoggerFactory.getLogger(WebSocketClientHandler.class.toString());
private final WebSocketClientHandshaker handshaker;
private ChannelPromise handshakeFuture;
private final IClientMessageCallback messageListener;
public WebSocketClientHandler(final WebSocketClientHandshaker handshaker, final IClientMessageCallback listener) {
this.handshaker = handshaker;
this.messageListener = listener;
}
public ChannelFuture handshakeFuture() {
return handshakeFuture;
}
@Override
public void handlerAdded(final ChannelHandlerContext ctx) throws Exception {
handshakeFuture = ctx.newPromise();
}
@Override
public void channelActive(final ChannelHandlerContext ctx) throws Exception {
handshaker.handshake(ctx.channel());
}
@Override
public void channelInactive(final ChannelHandlerContext ctx) throws Exception {
LOG.info("WebSocket Client disconnected!");
}
@Override
public void channelRead0(final ChannelHandlerContext ctx, final Object msg) throws Exception {
Channel ch = ctx.channel();
if (!handshaker.isHandshakeComplete()) {
handshaker.finishHandshake(ch, (FullHttpResponse) msg);
LOG.info("WebSocket Client connected!");
handshakeFuture.setSuccess();
return;
}
if (msg instanceof FullHttpResponse) {
FullHttpResponse response = (FullHttpResponse) msg;
throw new Exception("Unexpected FullHttpResponse (getStatus=" + response.status() + ", content="
+ response.content().toString(CharsetUtil.UTF_8) + ')');
}
messageListener.onMessageReceived(msg);
WebSocketFrame frame = (WebSocketFrame) msg;
if (frame instanceof PongWebSocketFrame) {
LOG.info("WebSocket Client received pong");
} else if (frame instanceof CloseWebSocketFrame) {
LOG.info("WebSocket Client received closing");
ch.close();
}
}
@Override
public void exceptionCaught(final ChannelHandlerContext ctx, final Throwable cause) throws Exception {
LOG.info("Cause: {} .", cause.toString());
if (!handshakeFuture.isDone()) {
handshakeFuture.setFailure(cause);
}
ctx.close();
}
}
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