Netty Http server & Client

一：Http Server

package com.taoyuanforrest.nettyserver;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.Channel;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioServerSocketChannel;

public final class HttpServer {

static final int PORT = 8080;

public static void main(String[] args) throws Exception {
EventLoopGroup bossGroup = new NioEventLoopGroup();
EventLoopGroup workerGroup = new NioEventLoopGroup();
try {
ServerBootstrap b = new ServerBootstrap();
b.option(ChannelOption.SO_BACKLOG, 1024);
b.group(bossGroup, workerGroup)
.channel(NioServerSocketChannel.class)
.childHandler(new HttpServerInitializer());

Channel ch = b.bind(PORT).sync().channel();

ch.closeFuture().sync();
} finally {
bossGroup.shutdownGracefully();
workerGroup.shutdownGracefully();
}
}
}

package com.taoyuanforrest.nettyserver;

import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.socket.SocketChannel;
import io.netty.handler.codec.http.HttpRequestDecoder;
import io.netty.handler.codec.http.HttpResponseEncoder;

public class HttpServerInitializer extends ChannelInitializer<SocketChannel> {

@Override
public void initChannel(SocketChannel ch) {
ChannelPipeline p = ch.pipeline();
p.addLast(new HttpResponseEncoder());
p.addLast(new HttpRequestDecoder());
p.addLast(new HttpServerHandler());
}
}

package com.taoyuanforrest.nettyserver;

import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelFutureListener;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.handler.codec.http.DefaultFullHttpResponse;
import io.netty.handler.codec.http.FullHttpResponse;
import io.netty.handler.codec.http.HttpHeaders;
import io.netty.handler.codec.http.HttpRequest;

import static io.netty.handler.codec.http.HttpHeaders.Names.*;
import static io.netty.handler.codec.http.HttpHeaders.Values;
import static io.netty.handler.codec.http.HttpResponseStatus.*;
import static io.netty.handler.codec.http.HttpVersion.*;

public class HttpServerHandler extends ChannelInboundHandlerAdapter {

@Override
public void channelReadComplete(ChannelHandlerContext ctx) {
ctx.flush();
}

@Override
public void channelRead(ChannelHandlerContext ctx, Object msg) {

if (msg instanceof HttpRequest) {
HttpRequest req = (HttpRequest) msg;
System.out.println("uri is: " + req.getUri() + " method is: " + req.getMethod());
boolean keepAlive = HttpHeaders.isKeepAlive(req);
FullHttpResponse response = new DefaultFullHttpResponse(HTTP_1_1, OK, Unpooled.wrappedBuffer("hello".getBytes()));
response.headers().set(CONTENT_TYPE, "text/plain");
response.headers().set(CONTENT_LENGTH, response.content().readableBytes());

if (!keepAlive) {
ctx.write(response).addListener(ChannelFutureListener.CLOSE);
} else {
response.headers().set(CONNECTION, Values.KEEP_ALIVE);
ctx.write(response);
}
}

}

@Override
public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
cause.printStackTrace();
ctx.close();
}
}

二：Http Client
package com.taoyuanforrest.nettyclient;

import io.netty.bootstrap.Bootstrap;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelFuture;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.codec.http.DefaultFullHttpRequest;
import io.netty.handler.codec.http.HttpHeaders;
import io.netty.handler.codec.http.HttpMethod;
import static io.netty.handler.codec.http.HttpVersion.*;

public final class HttpClient {

static final String SERVER = "127.0.0.1";
static final int PORT = 8080;

public static void main(String[] args) throws Exception {
EventLoopGroup workerGroup = new NioEventLoopGroup();
try {
Bootstrap b = new Bootstrap();
b.group(workerGroup)
.channel(NioSocketChannel.class)
.handler(new HttpClientInitializer());

ChannelFuture f = b.connect(SERVER, PORT).sync();
String uri = "/demo";
String msg = "i'm client";
DefaultFullHttpRequest request = new DefaultFullHttpRequest(HTTP_1_1, HttpMethod.POST,
uri, Unpooled.wrappedBuffer(msg.getBytes()));

request.headers().set(HttpHeaders.Names.CONNECTION, HttpHeaders.Values.KEEP_ALIVE);
request.headers().set(HttpHeaders.Names.CONTENT_LENGTH, request.content().readableBytes());
f.channel().write(request);
f.channel().flush();
f.channel().closeFuture().sync();
} finally {
workerGroup.shutdownGracefully();
}
}
}

package com.taoyuanforrest.nettyclient;

import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.socket.SocketChannel;
import io.netty.handler.codec.http.HttpRequestEncoder;
import io.netty.handler.codec.http.HttpResponseDecoder;

public class HttpClientInitializer extends ChannelInitializer<SocketChannel> {

@Override
public void initChannel(SocketChannel ch) {
ChannelPipeline p = ch.pipeline();
p.addLast(new HttpResponseDecoder());
p.addLast(new HttpRequestEncoder());
p.addLast(new HttpClientHandler());
}
}

package com.taoyuanforrest.nettyclient;

import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.handler.codec.http.HttpContent;
import io.netty.handler.codec.http.HttpHeaders;
import io.netty.handler.codec.http.HttpResponse;

public class HttpClientHandler extends ChannelInboundHandlerAdapter {

@Override
public void channelReadComplete(ChannelHandlerContext ctx) {
ctx.flush();
}

@Override
public void channelRead(ChannelHandlerContext ctx, Object msg) {
if (msg instanceof HttpResponse) {
HttpResponse response = (HttpResponse) msg;
System.out.println("CONTENT_TYPE:" + response.headers().get(HttpHeaders.Names.CONTENT_TYPE));
}

if (msg instanceof HttpContent) {
HttpContent content = (HttpContent)msg;
ByteBuf buf = content.content();
System.out.println(buf.toString(io.netty.util.CharsetUtil.UTF_8));
buf.release();
}
}

@Override
public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
cause.printStackTrace();
ctx.close();
}
}

源码工程： http://download.csdn.net/detail/sundongsdu/8958995