restconf/restconf-nb-bierman02/src/test/java/org/opendaylight/controller/sal/restconf/impl/websockets/client/WebSocketClient.java

   1 /*
   2  * Copyright (c) 2013 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   4  * This program and the accompanying materials are made available under the
   5  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
   6  * and is available at http://www.eclipse.org/legal/epl-v10.html
   7  */
   8 package org.opendaylight.controller.sal.restconf.impl.websockets.client;
   9
  10 import io.netty.bootstrap.Bootstrap;
  11 import io.netty.buffer.Unpooled;
  12 import io.netty.channel.Channel;
  13 import io.netty.channel.ChannelInitializer;
  14 import io.netty.channel.ChannelPipeline;
  15 import io.netty.channel.EventLoopGroup;
  16 import io.netty.channel.nio.NioEventLoopGroup;
  17 import io.netty.channel.socket.SocketChannel;
  18 import io.netty.channel.socket.nio.NioSocketChannel;
  19 import io.netty.handler.codec.http.HttpClientCodec;
  20 import io.netty.handler.codec.http.HttpObjectAggregator;
  21 import io.netty.handler.codec.http.websocketx.CloseWebSocketFrame;
  22 import io.netty.handler.codec.http.websocketx.PingWebSocketFrame;
  23 import io.netty.handler.codec.http.websocketx.TextWebSocketFrame;
  24 import io.netty.handler.codec.http.websocketx.WebSocketClientHandshakerFactory;
  25 import io.netty.handler.codec.http.websocketx.WebSocketVersion;
  26 import java.io.BufferedReader;
  27 import java.io.InputStreamReader;
  28 import java.net.URI;
  29 import org.slf4j.Logger;
  30 import org.slf4j.LoggerFactory;
  31
  32 public class WebSocketClient {
  33
  34     private static final Logger LOG = LoggerFactory.getLogger(WebSocketClient.class);
  35
  36     private final URI uri;
  37     private final Bootstrap bootstrap = new Bootstrap();
  38     private final WebSocketClientHandler clientHandler;
  39     private Channel clientChannel;
  40     private final EventLoopGroup group = new NioEventLoopGroup();
  41
  42     public WebSocketClient(final URI uri, final IClientMessageCallback clientMessageCallback) {
  43         this.uri = uri;
  44         clientHandler = new WebSocketClientHandler(WebSocketClientHandshakerFactory.newHandshaker(uri,
  45                 WebSocketVersion.V13, null, false, null), clientMessageCallback);
  46         // last null could be replaced with DefaultHttpHeaders
  47         initialize();
  48     }
  49
  50     private void initialize() {
  51
  52         String protocol = uri.getScheme();
  53         if (!"ws".equals(protocol)) {
  54             throw new IllegalArgumentException("Unsupported protocol: " + protocol);
  55         }
  56
  57         bootstrap.group(group).channel(NioSocketChannel.class).handler(new ChannelInitializer<SocketChannel>() {
  58             @Override
  59             public void initChannel(final SocketChannel ch) throws Exception {
  60                 ChannelPipeline pipeline = ch.pipeline();
  61                 pipeline.addLast("http-codec", new HttpClientCodec());
  62                 pipeline.addLast("aggregator", new HttpObjectAggregator(8192));
  63                 pipeline.addLast("ws-handler", clientHandler);
  64             }
  65         });
  66     }
  67
  68     public void connect() throws InterruptedException {
  69         LOG.info("WebSocket Client connecting");
  70         clientChannel = bootstrap.connect(uri.getHost(), uri.getPort()).sync().channel();
  71         clientHandler.handshakeFuture().sync();
  72     }
  73
  74     public void writeAndFlush(final String message) {
  75         clientChannel.writeAndFlush(new TextWebSocketFrame(message));
  76     }
  77
  78     public void writeAndFlush(final Object message) {
  79         clientChannel.writeAndFlush(message);
  80     }
  81
  82     public void ping() {
  83         clientChannel.writeAndFlush(new PingWebSocketFrame(Unpooled.copiedBuffer(new byte[] { 1, 2, 3, 4, 5, 6 })));
  84     }
  85
  86     public void close(final String reasonText) throws InterruptedException {
  87         CloseWebSocketFrame closeWebSocketFrame = new CloseWebSocketFrame(1000, reasonText);
  88         clientChannel.writeAndFlush(closeWebSocketFrame);
  89
  90         // WebSocketClientHandler will close the connection when the server
  91         // responds to the CloseWebSocketFrame.
  92         clientChannel.closeFuture().sync();
  93         group.shutdownGracefully();
  94     }
  95
  96     public static void main(final String[] args) throws Exception {
  97         URI uri;
  98         if (args.length > 0) {
  99             uri = new URI(args[0]);
 100         } else {
 101             uri = new URI("http://192.168.1.101:8181/opendaylight-inventory:nodes");
 102         }
 103         IClientMessageCallback messageCallback = new ClientMessageCallback();
 104         WebSocketClient webSocketClient = new WebSocketClient(uri, messageCallback);
 105         webSocketClient.connect();
 106
 107         while (true) {
 108             BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
 109             String input = br.readLine();
 110             if (input.equals("q")) {
 111                 LOG.info("Would you like to close stream? (Y = yes, empty = yes)\n");
 112                 input = br.readLine();
 113                 if (input.equals("yes") || input.isEmpty()) {
 114                     webSocketClient.close("opendaylight-inventory:nodes");
 115                     break;
 116                 }
 117             }
 118         }
 119     }
 120
 121     private static class ClientMessageCallback implements IClientMessageCallback {
 122         @Override
 123         public void onMessageReceived(final Object message) {
 124             if (message instanceof TextWebSocketFrame) {
 125                 LOG.info("received message {}" + ((TextWebSocketFrame) message).text());
 126             }
 127         }
 128     }
 129
 130 }