forked from undertow-io/undertow
/
WebSocketTestClient.java
243 lines (217 loc) · 8.53 KB
/
WebSocketTestClient.java
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
/*
* JBoss, Home of Professional Open Source.
* Copyright 2014 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* Licensed 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
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.undertow.websockets.utils;
import io.netty.bootstrap.Bootstrap;
import io.netty.channel.Channel;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.ChannelPromise;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.codec.http.DefaultHttpHeaders;
import io.netty.handler.codec.http.FullHttpResponse;
import io.netty.handler.codec.http.HttpClientCodec;
import io.netty.handler.codec.http.HttpObjectAggregator;
import io.netty.handler.codec.http.websocketx.CloseWebSocketFrame;
import io.netty.handler.codec.http.websocketx.WebSocketClientHandshaker;
import io.netty.handler.codec.http.websocketx.WebSocketClientHandshakerFactory;
import io.netty.handler.codec.http.websocketx.WebSocketFrame;
import io.netty.handler.codec.http.websocketx.WebSocketVersion;
import io.netty.util.CharsetUtil;
import io.netty.util.ReferenceCountUtil;
import java.net.InetSocketAddress;
import java.net.URI;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
/**
* Client which can be used to Test a websocket server
*
* @author <a href="mailto:nmaurer@redhat.com">Norman Maurer</a>
*/
public final class WebSocketTestClient {
private final Bootstrap bootstrap = new Bootstrap();
private Channel ch;
private final URI uri;
private final WebSocketVersion version;
private volatile boolean closed;
private static final AtomicInteger count = new AtomicInteger();
public WebSocketTestClient(WebSocketVersion version, URI uri) {
this.uri = uri;
this.version = version;
}
/**
* Connect the WebSocket client
*
* @throws Exception
*/
public WebSocketTestClient connect() throws Exception {
String protocol = uri.getScheme();
if (!"ws".equals(protocol)) {
throw new IllegalArgumentException("Unsupported protocol: " + protocol);
}
final WebSocketClientHandshaker handshaker =
WebSocketClientHandshakerFactory.newHandshaker(
uri, version, null, false, new DefaultHttpHeaders());
WSClientHandler handler = new WSClientHandler(handshaker);
EventLoopGroup group = new NioEventLoopGroup();
bootstrap.group(group)
.channel(NioSocketChannel.class)
.handler(new ChannelInitializer() {
@Override
protected void initChannel(Channel channel) throws Exception {
ChannelPipeline p = channel.pipeline();
p.addLast(
new HttpClientCodec(),
new HttpObjectAggregator(8192), handler);
}
});
// Connect
ChannelFuture future =
bootstrap.connect(
new InetSocketAddress(uri.getHost(), uri.getPort()));
future.syncUninterruptibly();
handler.handshakeFuture.syncUninterruptibly();
ch = future.channel();
return this;
}
/**
* Send the WebSocketFrame and call the FrameListener once a frame was received as response or
* when an Exception was caught.
*/
public WebSocketTestClient send(WebSocketFrame frame, final FrameListener listener) {
ch.pipeline().addLast("responseHandler" + count.incrementAndGet(), new SimpleChannelInboundHandler<Object>() {
@Override
protected void channelRead0(ChannelHandlerContext ctx, Object msg) throws Exception {
if (msg instanceof CloseWebSocketFrame) {
closed = true;
}
listener.onFrame((WebSocketFrame) msg);
ctx.pipeline().remove(this);
}
@Override
public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
cause.printStackTrace();
listener.onError(cause);
ctx.pipeline().remove(this);
}
});
ChannelFuture cf = ch.writeAndFlush(frame).syncUninterruptibly();
if (!cf.isSuccess()) {
listener.onError(cf.cause());
}
return this;
}
/**
* Destroy the client and also close open connections if any exist
*/
public void destroy() {
this.destroy(false);
}
public void destroy(boolean dirty) {
if (!closed && !dirty) {
final CountDownLatch latch = new CountDownLatch(1);
send(new CloseWebSocketFrame(), new FrameListener() {
@Override
public void onFrame(WebSocketFrame frame) {
latch.countDown();
}
@Override
public void onError(Throwable t) {
latch.countDown();
}
});
try {
latch.await(10, TimeUnit.SECONDS);
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
}
//bootstrap.releaseExternalResources();
if (ch != null) {
ch.close().syncUninterruptibly();
}
try {
bootstrap.group().shutdownGracefully(0, 1, TimeUnit.SECONDS).get();
} catch (InterruptedException e) {
throw new RuntimeException(e);
} catch (ExecutionException e) {
throw new RuntimeException(e);
}
}
public interface FrameListener {
/**
* Is called if an WebSocketFrame was received
*/
void onFrame(WebSocketFrame frame);
/**
* Is called if an error occurred
*/
void onError(Throwable t);
}
private static final class WSClientHandler extends SimpleChannelInboundHandler<Object> {
private final WebSocketClientHandshaker handshaker;
private ChannelPromise handshakeFuture;
WSClientHandler(WebSocketClientHandshaker handshaker) {
super(false);
this.handshaker = handshaker;
}
public ChannelFuture handshakeFuture() {
return handshakeFuture;
}
@Override
public void handlerAdded(ChannelHandlerContext ctx) {
handshakeFuture = ctx.newPromise();
}
@Override
public void channelActive(ChannelHandlerContext ctx) {
handshaker.handshake(ctx.channel());
}
@Override
protected void channelRead0(ChannelHandlerContext ctx, Object o) throws Exception {
Channel ch = ctx.channel();
if (!handshaker.isHandshakeComplete()) {
handshaker.finishHandshake(ch, (FullHttpResponse) o);
// the handshake response was processed upgrade is complete
handshakeFuture.setSuccess();
ReferenceCountUtil.release(o);
return;
}
if (o instanceof FullHttpResponse) {
FullHttpResponse response = (FullHttpResponse) o;
ReferenceCountUtil.release(o);
throw new Exception("Unexpected HttpResponse (status=" + response.getStatus() + ", content="
+ response.content().toString(CharsetUtil.UTF_8) + ')');
}
ctx.fireChannelRead(o);
}
@Override
public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
cause.printStackTrace();
if (!handshakeFuture.isDone()) {
handshakeFuture.setFailure(cause);
}
ctx.close();
}
}
}