223efc5f99
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: - applet - websocket/html5 - websocketx/sslserver - localecho/multithreaded - Add run-example.sh which simplifies launching an example from command line - Rewrite FileServer example 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.
67 lines
2.5 KiB
Java
67 lines
2.5 KiB
Java
/*
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* Copyright 2013 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 io.netty.example.http.helloworld;
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import io.netty.buffer.Unpooled;
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import io.netty.channel.ChannelFutureListener;
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import io.netty.channel.ChannelHandlerContext;
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import io.netty.channel.ChannelInboundHandlerAdapter;
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import io.netty.handler.codec.http.DefaultFullHttpResponse;
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import io.netty.handler.codec.http.FullHttpResponse;
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import io.netty.handler.codec.http.HttpRequest;
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import static io.netty.handler.codec.http.HttpHeaders.Names.*;
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import static io.netty.handler.codec.http.HttpHeaders.*;
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import static io.netty.handler.codec.http.HttpResponseStatus.*;
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import static io.netty.handler.codec.http.HttpVersion.*;
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public class HttpHelloWorldServerHandler extends ChannelInboundHandlerAdapter {
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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 channelReadComplete(ChannelHandlerContext ctx) {
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ctx.flush();
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}
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@Override
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public void channelRead(ChannelHandlerContext ctx, Object msg) {
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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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ctx.write(new DefaultFullHttpResponse(HTTP_1_1, CONTINUE));
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}
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boolean keepAlive = isKeepAlive(req);
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FullHttpResponse response = new DefaultFullHttpResponse(HTTP_1_1, OK, Unpooled.wrappedBuffer(CONTENT));
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response.headers().set(CONTENT_TYPE, "text/plain");
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response.headers().set(CONTENT_LENGTH, response.content().readableBytes());
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if (!keepAlive) {
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ctx.write(response).addListener(ChannelFutureListener.CLOSE);
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} else {
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response.headers().set(CONNECTION, Values.KEEP_ALIVE);
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ctx.write(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, Throwable cause) {
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cause.printStackTrace();
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ctx.close();
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}
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}
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