ba28679775
Motivation:
The examples have not been updated since long time ago, showing various
issues fixed in this commit.
Modifications:
- Overall simplification to reduce LoC
- Use system properties to get options instead of parsing args.
- Minimize option validation
- Just use System.out/err instead of Logger
- Do not pass config as parameters - just access it directly
- Move the main logic to main(String[]) instead of creating a new
instance meaninglessly
- Update netty-build-21 to make checkstyle not complain
- Remove 'throws Exception' clause if possible
- Line wrap at 120 (previously at 80)
- Add an option to enable SSL for most examples
- Use ChannelFuture.sync() instead of await()
- Use System.out for the actual result. Use System.err otherwise.
- Delete examples that are not very useful:
- websocket/html5
- websocketx/sslserver
- localecho/multithreaded
- Add run-example.sh which simplifies launching an example from command
line
Result:
Shorter and simpler examples. A user can focus more on what it actually
does than miscellaneous stuff. A user can launch an example very
easily.
122 lines
4.7 KiB
Java
122 lines
4.7 KiB
Java
/*
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* Copyright 2012 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package org.jboss.netty.example.http.tunnel;
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import org.jboss.netty.bootstrap.ClientBootstrap;
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import org.jboss.netty.channel.ChannelFuture;
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import org.jboss.netty.channel.ChannelPipeline;
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import org.jboss.netty.channel.ChannelPipelineFactory;
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import org.jboss.netty.channel.Channels;
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import org.jboss.netty.channel.socket.http.HttpTunnelingClientSocketChannelFactory;
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import org.jboss.netty.channel.socket.oio.OioClientSocketChannelFactory;
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import org.jboss.netty.handler.codec.string.StringDecoder;
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import org.jboss.netty.handler.codec.string.StringEncoder;
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import org.jboss.netty.handler.logging.LoggingHandler;
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import org.jboss.netty.handler.ssl.JdkSslClientContext;
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import org.jboss.netty.handler.ssl.util.InsecureTrustManagerFactory;
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import org.jboss.netty.logging.InternalLogLevel;
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import java.io.BufferedReader;
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import java.io.InputStreamReader;
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import java.net.InetSocketAddress;
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import java.net.URI;
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import java.util.concurrent.Executors;
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/**
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* An HTTP tunneled version of the telnet client example. Please refer to the
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* API documentation of the <tt>org.jboss.netty.channel.socket.http</tt> package
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* for the detailed instruction on how to deploy the server-side HTTP tunnel in
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* your Servlet container.
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*/
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public final class HttpTunnelingClientExample {
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static final String URL = System.getProperty("url", "http://localhost:8080/netty-tunnel");
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public static void main(String[] args) throws Exception {
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URI uri = new URI(URL);
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String scheme = uri.getScheme() == null? "http" : uri.getScheme();
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String host = uri.getHost() == null? "127.0.0.1" : uri.getHost();
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int port = uri.getPort();
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if (port == -1) {
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if ("http".equalsIgnoreCase(scheme)) {
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port = 80;
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} else if ("https".equalsIgnoreCase(scheme)) {
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port = 443;
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}
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}
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if (!"http".equalsIgnoreCase(scheme) && !"https".equalsIgnoreCase(scheme)) {
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System.err.println("Only HTTP(S) is supported.");
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return;
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}
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// Configure the client.
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ClientBootstrap b = new ClientBootstrap(
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new HttpTunnelingClientSocketChannelFactory(
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new OioClientSocketChannelFactory(Executors.newCachedThreadPool())));
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try {
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b.setPipelineFactory(new ChannelPipelineFactory() {
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public ChannelPipeline getPipeline() {
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return Channels.pipeline(
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new StringDecoder(),
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new StringEncoder(),
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new LoggingHandler(InternalLogLevel.INFO));
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}
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});
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// Set additional options required by the HTTP tunneling transport.
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b.setOption("serverName", uri.getHost());
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b.setOption("serverPath", uri.getRawPath());
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// Configure SSL if necessary
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if ("https".equals(scheme)) {
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b.setOption("sslContext", new JdkSslClientContext(InsecureTrustManagerFactory.INSTANCE).context());
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}
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// Make the connection attempt.
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ChannelFuture channelFuture = b.connect(new InetSocketAddress(host, port));
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channelFuture.sync();
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// Read commands from the stdin.
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System.err.println("Enter text ('quit' to exit)");
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ChannelFuture lastWriteFuture = null;
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BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
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for (;;) {
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String line = in.readLine();
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if (line == null || "quit".equalsIgnoreCase(line)) {
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break;
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}
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// Sends the received line to the server.
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lastWriteFuture = channelFuture.getChannel().write(line);
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}
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// Wait until all messages are flushed before closing the channel.
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if (lastWriteFuture != null) {
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lastWriteFuture.sync();
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}
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// Close the connection.
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channelFuture.getChannel().close().sync();
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} finally {
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// Shut down all threads.
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b.releaseExternalResources();
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}
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}
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}
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