netty 处理 get 请求

最新推荐文章于 2023-05-20 21:44:50 发布

原创最新推荐文章于 2023-05-20 21:44:50 发布 · 3.2k 阅读

0 ·

CC 4.0 BY-SA版权

netty 专栏收录该内容

3 篇文章

订阅专栏

本文介绍如何使用Netty搭建一个简单的HTTP服务器，并实现GET请求处理。服务器能够接收客户端发送的GET请求，解析请求中的参数，并返回JSON格式的数据。

请求样式：

http://10.32.7.7:2360/?name=aaa 注意这里必须是问号，name 等号的形式

代码留存

package com.cip.arch.enne;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.codec.http.HttpObjectAggregator;
import io.netty.handler.codec.http.HttpRequestDecoder;
import io.netty.handler.codec.http.HttpResponseEncoder;
import io.netty.handler.stream.ChunkedWriteHandler;

public class NettyServer
{
	private static final int SERVER_PORT = 2360;
	private static final String DEFAULT_URL = "/";
	
	public void start(final String ip) throws Exception
	{
		EventLoopGroup bossGroup = new NioEventLoopGroup();
		EventLoopGroup workerGroup = new NioEventLoopGroup();
		try
		{
			ServerBootstrap b = new ServerBootstrap();
			b.group(bossGroup, workerGroup).channel(NioServerSocketChannel.class)
					.childHandler(new ChannelInitializer<SocketChannel>()
					{
						@Override
						protected void initChannel(SocketChannel ch) throws Exception
						{
							ch.pipeline().addLast("http-decoder", new HttpRequestDecoder());
							ch.pipeline().addLast("http-encoder", new HttpResponseEncoder());
							ch.pipeline().addLast("http-aggregator", new HttpObjectAggregator(65536));
							ch.pipeline().addLast("http-chunked", new ChunkedWriteHandler());
							ch.pipeline().addLast("HttpServerHandler", new NettyServerHandler());
						}
					});
			ChannelFuture future = b.bind(ip, SERVER_PORT).sync();
			System.out.println("HTTP server start: " + "http://"+ip+":" + SERVER_PORT + DEFAULT_URL);
			future.channel().closeFuture().sync();
		}
		finally
		{
			bossGroup.shutdownGracefully();
			workerGroup.shutdownGracefully();
		}
	}

	public static void main(String[] args) throws Exception {
		String ip = "10.32.7.7";
		new NettyServer().start(ip);
	}
}

package com.ctp.sech.engi;

import static io.netty.handler.codec.http.HttpHeaders.Names.CONTENT_LENGTH;
import static io.netty.handler.codec.http.HttpHeaders.Names.CONTENT_TYPE;
import static io.netty.handler.codec.http.HttpResponseStatus.OK;
import static io.netty.handler.codec.http.HttpVersion.HTTP_1_1;

import java.nio.charset.Charset;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.alibaba.fastjson.serializer.SerializerFeature;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelFutureListener;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.handler.codec.http.DefaultFullHttpResponse;
import io.netty.handler.codec.http.FullHttpRequest;
import io.netty.handler.codec.http.FullHttpResponse;
import io.netty.handler.codec.http.QueryStringDecoder;

public class NettyServerHandler extends SimpleChannelInboundHandler<FullHttpRequest> {
	
	StringBuilder sb = new StringBuilder();
	JSONArray jsonarray = new JSONArray();
	
	public NettyServerHandler() {
		jsonarray.add(getJsonObj("name", "ar.sear.ocalplay"));
		jsonarray.add(getJsonObj("name", "ar.sear.ticket"));
		jsonarray.add(getJsonObj("name", "ar.sear.tel"));
		jsonarray.add(getJsonObj("name", "ar.sear.surehotel"));
	}
	
	public JSONObject getJsonObj(String name, String value) {
		JSONObject jsonobj = new JSONObject();
		jsonobj.put(name,value);
		return jsonobj;
	}
	
	@Override
	public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
		cause.printStackTrace();
	}
	
	@Override
	protected void channelRead0(ChannelHandlerContext ctx, FullHttpRequest msg) //
			throws Exception {//函数执行次数？
		//解析get请求参数
		QueryStringDecoder decoder = new QueryStringDecoder(msg.getUri());  
		Map<String, List<String>> parame = decoder.parameters();  
		for(Entry<String, List<String>> entry : parame.entrySet()) {
			System.out.println(entry.getKey() + " : " +entry.getValue());
			
		}
		FullHttpResponse response = new DefaultFullHttpResponse(HTTP_1_1, OK); // 响应
		response.headers().set(CONTENT_TYPE, "text/html; charset=UTF-8");
		ByteBuf responseContentByteBuf = Unpooled.copiedBuffer(JSON.toJSONString(jsonarray,SerializerFeature.DisableCircularReferenceDetect).getBytes(Charset.forName("utf-8")));
		response.headers().set("Access-Control-Allow-Origin","*"); // 跨域
		response.headers().set(CONTENT_LENGTH, responseContentByteBuf.readableBytes());
		response.content().writeBytes(responseContentByteBuf);
		responseContentByteBuf.release();//zuoyong?
		ctx.writeAndFlush(response).addListener(ChannelFutureListener.CLOSE);//
	}
	
}