2011-10-17 06:12:37 +02:00
|
|
|
/*
|
2011-12-09 06:18:34 +01:00
|
|
|
* Copyright 2011 The Netty Project
|
2011-10-17 06:12:37 +02:00
|
|
|
*
|
2011-12-09 06:18:34 +01:00
|
|
|
* The Netty Project licenses this file to you under the Apache License,
|
|
|
|
* version 2.0 (the "License"); you may not use this file except in compliance
|
|
|
|
* with the License. You may obtain a copy of the License at:
|
2011-10-17 06:12:37 +02:00
|
|
|
*
|
2011-12-09 06:18:34 +01:00
|
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
2011-10-17 06:12:37 +02:00
|
|
|
*
|
|
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
2011-12-09 06:18:34 +01:00
|
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
2011-10-17 06:12:37 +02:00
|
|
|
* License for the specific language governing permissions and limitations
|
|
|
|
* under the License.
|
|
|
|
*/
|
2011-12-09 04:38:59 +01:00
|
|
|
package io.netty.example.http.websocketx.autobahn;
|
2011-10-17 06:12:37 +02:00
|
|
|
|
2011-12-09 04:38:59 +01:00
|
|
|
import static io.netty.handler.codec.http.HttpHeaders.*;
|
|
|
|
import static io.netty.handler.codec.http.HttpMethod.*;
|
|
|
|
import static io.netty.handler.codec.http.HttpResponseStatus.*;
|
|
|
|
import static io.netty.handler.codec.http.HttpVersion.*;
|
2011-10-17 06:12:37 +02:00
|
|
|
|
2011-12-09 04:38:59 +01:00
|
|
|
import io.netty.buffer.ChannelBuffers;
|
|
|
|
import io.netty.channel.ChannelFuture;
|
|
|
|
import io.netty.channel.ChannelFutureListener;
|
|
|
|
import io.netty.channel.ChannelHandlerContext;
|
|
|
|
import io.netty.channel.ExceptionEvent;
|
|
|
|
import io.netty.channel.MessageEvent;
|
|
|
|
import io.netty.channel.SimpleChannelUpstreamHandler;
|
|
|
|
import io.netty.handler.codec.http.DefaultHttpResponse;
|
|
|
|
import io.netty.handler.codec.http.HttpHeaders;
|
|
|
|
import io.netty.handler.codec.http.HttpRequest;
|
|
|
|
import io.netty.handler.codec.http.HttpResponse;
|
|
|
|
import io.netty.handler.codec.http.websocketx.BinaryWebSocketFrame;
|
|
|
|
import io.netty.handler.codec.http.websocketx.CloseWebSocketFrame;
|
|
|
|
import io.netty.handler.codec.http.websocketx.ContinuationWebSocketFrame;
|
|
|
|
import io.netty.handler.codec.http.websocketx.PingWebSocketFrame;
|
|
|
|
import io.netty.handler.codec.http.websocketx.PongWebSocketFrame;
|
|
|
|
import io.netty.handler.codec.http.websocketx.TextWebSocketFrame;
|
|
|
|
import io.netty.handler.codec.http.websocketx.WebSocketFrame;
|
|
|
|
import io.netty.handler.codec.http.websocketx.WebSocketServerHandshaker;
|
|
|
|
import io.netty.handler.codec.http.websocketx.WebSocketServerHandshakerFactory;
|
|
|
|
import io.netty.logging.InternalLogger;
|
|
|
|
import io.netty.logging.InternalLoggerFactory;
|
|
|
|
import io.netty.util.CharsetUtil;
|
2011-10-17 06:12:37 +02:00
|
|
|
|
|
|
|
/**
|
|
|
|
* Handles handshakes and messages
|
|
|
|
*/
|
|
|
|
public class WebSocketServerHandler extends SimpleChannelUpstreamHandler {
|
|
|
|
private static final InternalLogger logger = InternalLoggerFactory.getInstance(WebSocketServerHandler.class);
|
|
|
|
|
|
|
|
private WebSocketServerHandshaker handshaker = null;
|
|
|
|
|
|
|
|
@Override
|
|
|
|
public void messageReceived(ChannelHandlerContext ctx, MessageEvent e) throws Exception {
|
|
|
|
Object msg = e.getMessage();
|
|
|
|
if (msg instanceof HttpRequest) {
|
|
|
|
handleHttpRequest(ctx, (HttpRequest) msg);
|
|
|
|
} else if (msg instanceof WebSocketFrame) {
|
|
|
|
handleWebSocketFrame(ctx, (WebSocketFrame) msg);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
private void handleHttpRequest(ChannelHandlerContext ctx, HttpRequest req) throws Exception {
|
|
|
|
// Allow only GET methods.
|
|
|
|
if (req.getMethod() != GET) {
|
|
|
|
sendHttpResponse(ctx, req, new DefaultHttpResponse(HTTP_1_1, FORBIDDEN));
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
// Handshake
|
|
|
|
WebSocketServerHandshakerFactory wsFactory = new WebSocketServerHandshakerFactory(
|
|
|
|
this.getWebSocketLocation(req), null, false);
|
2011-12-11 00:47:07 +01:00
|
|
|
this.handshaker = wsFactory.newHandshaker(req);
|
2011-10-17 06:12:37 +02:00
|
|
|
if (this.handshaker == null) {
|
2011-12-11 00:47:07 +01:00
|
|
|
wsFactory.sendUnsupportedWebSocketVersionResponse(ctx.getChannel());
|
2011-10-17 06:12:37 +02:00
|
|
|
} else {
|
2011-12-11 00:47:07 +01:00
|
|
|
this.handshaker.performOpeningHandshake(ctx.getChannel(), req);
|
2011-10-17 06:12:37 +02:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
private void handleWebSocketFrame(ChannelHandlerContext ctx, WebSocketFrame frame) {
|
|
|
|
logger.debug(String
|
|
|
|
.format("Channel %s received %s", ctx.getChannel().getId(), frame.getClass().getSimpleName()));
|
|
|
|
|
|
|
|
if (frame instanceof CloseWebSocketFrame) {
|
2011-12-11 00:47:07 +01:00
|
|
|
this.handshaker.performClosingHandshake(ctx.getChannel(), (CloseWebSocketFrame) frame);
|
2011-10-17 06:12:37 +02:00
|
|
|
} else if (frame instanceof PingWebSocketFrame) {
|
|
|
|
ctx.getChannel().write(
|
|
|
|
new PongWebSocketFrame(frame.isFinalFragment(), frame.getRsv(), frame.getBinaryData()));
|
|
|
|
} else if (frame instanceof TextWebSocketFrame) {
|
2011-12-15 06:09:09 +01:00
|
|
|
// String text = ((TextWebSocketFrame) frame).getText();
|
|
|
|
ctx.getChannel().write(
|
|
|
|
new TextWebSocketFrame(frame.isFinalFragment(), frame.getRsv(), frame.getBinaryData()));
|
2011-10-17 06:12:37 +02:00
|
|
|
} else if (frame instanceof BinaryWebSocketFrame) {
|
|
|
|
ctx.getChannel().write(
|
|
|
|
new BinaryWebSocketFrame(frame.isFinalFragment(), frame.getRsv(), frame.getBinaryData()));
|
|
|
|
} else if (frame instanceof ContinuationWebSocketFrame) {
|
|
|
|
ctx.getChannel().write(
|
|
|
|
new ContinuationWebSocketFrame(frame.isFinalFragment(), frame.getRsv(), frame.getBinaryData()));
|
|
|
|
} else if (frame instanceof PongWebSocketFrame) {
|
|
|
|
// Ignore
|
|
|
|
} else {
|
|
|
|
throw new UnsupportedOperationException(String.format("%s frame types not supported", frame.getClass()
|
|
|
|
.getName()));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
private void sendHttpResponse(ChannelHandlerContext ctx, HttpRequest req, HttpResponse res) {
|
|
|
|
// Generate an error page if response status code is not OK (200).
|
|
|
|
if (res.getStatus().getCode() != 200) {
|
|
|
|
res.setContent(ChannelBuffers.copiedBuffer(res.getStatus().toString(), CharsetUtil.UTF_8));
|
|
|
|
setContentLength(res, res.getContent().readableBytes());
|
|
|
|
}
|
|
|
|
|
|
|
|
// Send the response and close the connection if necessary.
|
|
|
|
ChannelFuture f = ctx.getChannel().write(res);
|
|
|
|
if (!isKeepAlive(req) || res.getStatus().getCode() != 200) {
|
|
|
|
f.addListener(ChannelFutureListener.CLOSE);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
@Override
|
|
|
|
public void exceptionCaught(ChannelHandlerContext ctx, ExceptionEvent e) throws Exception {
|
|
|
|
e.getCause().printStackTrace();
|
|
|
|
e.getChannel().close();
|
|
|
|
}
|
|
|
|
|
|
|
|
private String getWebSocketLocation(HttpRequest req) {
|
|
|
|
return "ws://" + req.getHeader(HttpHeaders.Names.HOST);
|
|
|
|
}
|
|
|
|
}
|