netty httpserver

Posted 2020-08-03 全力以赴001

netty也可以作为一个小巧的http服务器使用。

 

 1 package com.ming.netty.http.httpserver;
 2 
 3 import java.net.InetSocketAddress;
 4 
 5 import io.netty.bootstrap.ServerBootstrap;
 6 import io.netty.channel.ChannelFuture;
 7 import io.netty.channel.ChannelInitializer;
 8 import io.netty.channel.nio.NioEventLoopGroup;
 9 import io.netty.channel.socket.SocketChannel;
10 import io.netty.channel.socket.nio.NioserverSocketChannel;
11 import io.netty.handler.codec.http.HttpContentCompressor;
12 import io.netty.handler.codec.http.HttpObjectAggregator;
13 import io.netty.handler.codec.http.HttpRequestDecoder;
14 import io.netty.handler.codec.http.HttpResponseDecoder;
15 import io.netty.handler.stream.ChunkedWriteHandler;
16 
17 public class HttpServer {
18 
19     public static void main(String[] args) {
20         new HttpServer().run("127.0.0.1", 8500);
21     }
22     
23     
24     public void run(String addr,int port){
25         NioEventLoopGroup boosGroup=new NioEventLoopGroup();
26         NioEventLoopGroup workGroup=new NioEventLoopGroup();
27         try {
28             ServerBootstrap bootstrap=new ServerBootstrap();
29             bootstrap.group(boosGroup, workGroup);
30             bootstrap.channel(NioServerSocketChannel.class);
31             bootstrap.childHandler(new ChannelInitializer<SocketChannel>() {
32 
33                 @Override
34                 protected void initChannel(SocketChannel ch) throws Exception {
35                     ch.pipeline().addLast("http-decoder",new HttpRequestDecoder());
36                     ch.pipeline().addLast("http-aggregator",new HttpObjectAggregator(65536));//定义缓冲数据量  
37                     ch.pipeline().addLast("encoder", new HttpResponseDecoder());
38                     ch.pipeline().addLast("chunkedWriter", new ChunkedWriteHandler());
39                     ch.pipeline().addLast("deflater", new HttpContentCompressor());//压缩作用
40                     ch.pipeline().addLast("handler", new HttpServerHandler());
41                 }
42                 
43             });
44              ChannelFuture f=bootstrap.bind(new InetSocketAddress(addr, port)).sync();
45               System.out.println("启动服务器:"+f.channel().localAddress());
46               //等等服务器端监听端口关闭
47               f.channel().closeFuture().sync();
48         } catch (Exception e) {
49             e.printStackTrace();
50         }finally{
51              workGroup.shutdownGracefully();
52              workGroup.shutdownGracefully();
53         }
54     }
55     
56     
57 }

 

  1 package com.ming.netty.http.httpserver;
  2 
  3 import java.nio.ByteBuffer;
  4 import java.util.Map;
  5 
  6 import io.netty.buffer.ByteBuf;
  7 import io.netty.buffer.Unpooled;
  8 import io.netty.buffer.UnpooledByteBufAllocator;
  9 import io.netty.channel.Channel;
 10 import io.netty.channel.ChannelFutureListener;
 11 import io.netty.channel.ChannelHandlerContext;
 12 import io.netty.channel.SimpleChannelInboundHandler;
 13 import io.netty.handler.codec.http.DefaultFullHttpRequest;
 14 import io.netty.handler.codec.http.DefaultFullHttpResponse;
 15 import io.netty.handler.codec.http.FullHttpResponse;
 16 import io.netty.handler.codec.http.HttpContent;
 17 import io.netty.handler.codec.http.HttpHeaders;
 18 import io.netty.handler.codec.http.HttpMessage;
 19 import io.netty.handler.codec.http.HttpRequest;
 20 import io.netty.handler.codec.http.HttpResponseStatus;
 21 import io.netty.handler.codec.http.HttpVersion;
 22 import io.netty.handler.codec.http.LastHttpContent;
 23 import io.netty.util.CharsetUtil;
 24 
 25 public class HttpServerHandler  extends SimpleChannelInboundHandler<Object> {
 26 
 27     private HttpRequest request;
 28     
 29     private ByteBuf buffer_body = UnpooledByteBufAllocator.DEFAULT.buffer();
 30     
 31     private StringBuffer sb_debug = new StringBuffer();
 32     
 33     @Override
 34     protected void messageReceived(ChannelHandlerContext ctx, Object msg) throws Exception {
 35         DefaultFullHttpRequest request=(DefaultFullHttpRequest)msg;  
 36         
 37         System.out.println("启动服务器:"+request.getMethod()+request.getUri());
 38          try {
 39               if ((msg instanceof HttpMessage) && HttpHeaders.is100ContinueExpected((HttpMessage)msg)) {
 40                 ctx.write(new DefaultFullHttpResponse(HttpVersion.HTTP_1_1, HttpResponseStatus.CONTINUE));
 41               }
 42               if (msg instanceof HttpRequest) {
 43                 this.request = (HttpRequest)msg;
 44                 sb_debug.append("\n>> HTTP REQUEST -----------\n");
 45                 sb_debug.append(this.request.getProtocolVersion().toString())
 46                     .append(" ").append(this.request.getMethod().name())
 47                     .append(" ").append(this.request.getUri());
 48                 sb_debug.append("\n");
 49                 HttpHeaders headers = this.request.headers();
 50                 if (!headers.isEmpty()) {
 51                   for (Map.Entry<String, String> header : headers) {
 52                     sb_debug.append(header.getKey()).append(": ").append(header.getValue()).append("\n");
 53                   }
 54                 }
 55                 sb_debug.append("\n");
 56               } else if (msg instanceof HttpContent) {
 57                 HttpContent content = (HttpContent) msg;
 58                 ByteBuf thisContent = content.content();
 59                 if (thisContent.isReadable()) {
 60                   buffer_body.writeBytes(thisContent);
 61                 }
 62                 if (msg instanceof LastHttpContent) {
 63                   sb_debug.append(buffer_body.toString(CharsetUtil.UTF_8));
 64                   LastHttpContent trailer = (LastHttpContent) msg;
 65                   if (!trailer.trailingHeaders().isEmpty()) {
 66                     for (String name : trailer.trailingHeaders().names()) {
 67                       sb_debug.append(name).append("=");
 68                       for (String value : trailer.trailingHeaders().getAll(name)) {
 69                         sb_debug.append(value).append(",");
 70                       }
 71                       sb_debug.append("\n\n");
 72                     }
 73                   }
 74                   sb_debug.append("\n<< HTTP REQUEST -----------");
 75                 }
 76               }
 77             } catch (Exception e) {
 78               e.printStackTrace();
 79             } finally {
 80                 System.out.println(sb_debug+"");
 81                 FullHttpResponse  response=new DefaultFullHttpResponse(HttpVersion.HTTP_1_1, HttpResponseStatus.ACCEPTED);
 82                 String str="hello,my netty httpServer!";
 83                 StringBuilder buf=new StringBuilder();
 84                 buf.append("<!DOCTYPE html><head></head><body>").append(str).append("</body></html>");
 85                 ByteBuf buffer=Unpooled.copiedBuffer(buf,CharsetUtil.UTF_8);
 86                 response.content().writeBytes(buffer);
 87                 response.headers().set("Content-Type", "text/html; charset=UTF-8");
 88                 response.headers().set("Content-Length",1000);
 89                 buffer.release();
 90                 ctx.writeAndFlush(response).addListener(ChannelFutureListener.CLOSE);
 91                 
 92               
 93             }
 94     }
 95 
 96     
 97     
 98     
 99     
100     
101 
102 }