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.
74 lines
3.0 KiB
Java
74 lines
3.0 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.helloworld;
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import org.jboss.netty.buffer.ChannelBuffers;
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import org.jboss.netty.channel.Channel;
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import org.jboss.netty.channel.ChannelFuture;
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import org.jboss.netty.channel.ChannelFutureListener;
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import org.jboss.netty.channel.ChannelHandlerContext;
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import org.jboss.netty.channel.Channels;
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import org.jboss.netty.channel.ExceptionEvent;
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import org.jboss.netty.channel.MessageEvent;
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import org.jboss.netty.channel.SimpleChannelUpstreamHandler;
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import org.jboss.netty.handler.codec.http.DefaultHttpResponse;
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import org.jboss.netty.handler.codec.http.HttpRequest;
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import org.jboss.netty.handler.codec.http.HttpResponse;
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import static org.jboss.netty.handler.codec.http.HttpHeaders.Names.*;
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import static org.jboss.netty.handler.codec.http.HttpHeaders.*;
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import static org.jboss.netty.handler.codec.http.HttpResponseStatus.*;
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import static org.jboss.netty.handler.codec.http.HttpVersion.*;
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public class HttpHelloWorldServerHandler extends SimpleChannelUpstreamHandler {
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private static final byte[] CONTENT = { 'H', 'e', 'l', 'l', 'o', ' ', 'W', 'o', 'r', 'l', 'd' };
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@Override
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public void messageReceived(ChannelHandlerContext ctx, MessageEvent e) {
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Object msg = e.getMessage();
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Channel ch = e.getChannel();
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if (msg instanceof HttpRequest) {
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HttpRequest req = (HttpRequest) msg;
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if (is100ContinueExpected(req)) {
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Channels.write(ctx, Channels.future(ch), new DefaultHttpResponse(HTTP_1_1, CONTINUE));
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}
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boolean keepAlive = isKeepAlive(req);
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HttpResponse response = new DefaultHttpResponse(HTTP_1_1, OK);
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response.setContent(ChannelBuffers.wrappedBuffer(CONTENT));
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response.headers().set(CONTENT_TYPE, "text/plain");
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response.headers().set(CONTENT_LENGTH, response.getContent().readableBytes());
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if (!keepAlive) {
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ChannelFuture f = Channels.future(ch);
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f.addListener(ChannelFutureListener.CLOSE);
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Channels.write(ctx, f, response);
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} else {
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response.headers().set(CONNECTION, Values.KEEP_ALIVE);
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Channels.write(ctx, Channels.future(ch), response);
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}
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}
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}
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@Override
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public void exceptionCaught(ChannelHandlerContext ctx, ExceptionEvent e) {
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e.getCause().printStackTrace();
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e.getChannel().close();
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}
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}
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