netty 简单httpserver实现

package com.jiepu.netty;

/**

中文文档：http://ifeve.com/netty5-user-guide/

 */
import java.net.InetSocketAddress;
import java.util.concurrent.Executors;

import org.jboss.netty.bootstrap.ServerBootstrap;
import org.jboss.netty.channel.ChannelPipeline;
import org.jboss.netty.channel.ChannelPipelineFactory;
import org.jboss.netty.channel.Channels;
import org.jboss.netty.channel.socket.nio.NioServerSocketChannelFactory;
import org.jboss.netty.handler.codec.http.HttpRequestDecoder;
import org.jboss.netty.handler.codec.http.HttpResponseEncoder;
   
/**  
 * 后台管理服务  
 * http://www.oschina.net/code/snippet_12_2759
 */ 
public class AdminServer {   
    public static void main(String[] args) {   
        start(7777);   
    }   
   
    public static void start(int port) {   
        // 配置服务器-使用java线程池作为解释线程   
        ServerBootstrap bootstrap = new ServerBootstrap(new NioServerSocketChannelFactory(Executors.newCachedThreadPool(), Executors.newCachedThreadPool()));   
        // 设置 pipeline factory.   
        bootstrap.setPipelineFactory(new ServerPipelineFactory());   
        // 绑定端口   
        bootstrap.bind(new InetSocketAddress(port));   
        System.out.println("admin start on "+port);   
    }   
   
    private static class ServerPipelineFactory implements 
            ChannelPipelineFactory {   
        public ChannelPipeline getPipeline() throws Exception {   
            // Create a default pipeline implementation. 
        
            ChannelPipeline pipeline = Channels.pipeline();   
            pipeline.addLast("decoder", new HttpRequestDecoder());   
            pipeline.addLast("encoder", new HttpResponseEncoder());   
            //http处理handler   
            pipeline.addLast("handler", new AdminServerHandler());   
            return pipeline;   
        }   
    }   
}

package com.jiepu.netty;

import static org.jboss.netty.handler.codec.http.HttpHeaders.Names.CONTENT_TYPE;
import static org.jboss.netty.handler.codec.http.HttpResponseStatus.BAD_REQUEST;
import static org.jboss.netty.handler.codec.http.HttpResponseStatus.INTERNAL_SERVER_ERROR;
import static org.jboss.netty.handler.codec.http.HttpResponseStatus.OK;
import static org.jboss.netty.handler.codec.http.HttpVersion.HTTP_1_1;

import org.jboss.netty.buffer.ChannelBuffer;
import org.jboss.netty.buffer.ChannelBuffers;
import org.jboss.netty.buffer.DynamicChannelBuffer;
import org.jboss.netty.channel.Channel;
import org.jboss.netty.channel.ChannelFutureListener;
import org.jboss.netty.channel.ChannelHandlerContext;
import org.jboss.netty.channel.ExceptionEvent;
import org.jboss.netty.channel.MessageEvent;
import org.jboss.netty.channel.SimpleChannelUpstreamHandler;
import org.jboss.netty.handler.codec.frame.TooLongFrameException;
import org.jboss.netty.handler.codec.http.DefaultHttpResponse;
import org.jboss.netty.handler.codec.http.HttpRequest;
import org.jboss.netty.handler.codec.http.HttpResponse;
import org.jboss.netty.handler.codec.http.HttpResponseStatus;
import org.jboss.netty.util.CharsetUtil;

/**
 * @author javagg
 */
public class AdminServerHandler extends SimpleChannelUpstreamHandler {

	@Override
	public void messageReceived(ChannelHandlerContext ctx, MessageEvent e)
			throws Exception {
		HttpRequest request = (HttpRequest) e.getMessage();
		String uri = request.getUri();
		System.out.println("uri:" + uri);
		HttpResponse response = new DefaultHttpResponse(HTTP_1_1, OK);
		ChannelBuffer buffer = new DynamicChannelBuffer(2048);
		buffer.writeBytes("hello, oschina".getBytes("UTF-8"));
		response.setContent(buffer);
		response.setHeader("Content-Type", "text/html; charset=UTF-8");
		response.setHeader("Content-Length", response.getContent()
				.writerIndex());
		Channel ch = e.getChannel();
		// Write the initial line and the header.
		ch.write(response);
		ch.disconnect();
		ch.close();

	}

	@Override
	public void exceptionCaught(ChannelHandlerContext ctx, ExceptionEvent e)
			throws Exception {
		Channel ch = e.getChannel();
		Throwable cause = e.getCause();
		if (cause instanceof TooLongFrameException) {
			sendError(ctx, BAD_REQUEST);
			return;
		}

		cause.printStackTrace();
		if (ch.isConnected()) {
			sendError(ctx, INTERNAL_SERVER_ERROR);
		}
	}

	@SuppressWarnings("deprecation")
	private void sendError(ChannelHandlerContext ctx, HttpResponseStatus status) {
		HttpResponse response = new DefaultHttpResponse(HTTP_1_1, status);
		response.setHeader(CONTENT_TYPE, "text/plain; charset=UTF-8");
		response.setContent(ChannelBuffers.copiedBuffer(
				"Failure: " + status.toString() + "\r\n", CharsetUtil.UTF_8));

		// Close the connection as soon as the error message is sent.
		ctx.getChannel().write(response).addListener(ChannelFutureListener.CLOSE);
	}
}

	4.0.0

	com.jiepu
	netty
	0.0.1-SNAPSHOT
	jar

	netty
	http://maven.apache.org

	
		UTF-8
	

	
		
			junit
			junit
			4.10
			test
				
		
			io.netty
			netty
			3.8.0.Final
		
	

http://www.oschina.net/code/snippet_12_2759