Netty+SpringBoot写一个基于Http协议的文件服务器
本文参考《Netty权威指南》
NettyApplication
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 | package com.xh.netty; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; @SpringBootApplication public class NettyApplication { public static void main(String[] args) { SpringApplication.run(NettyApplication. class , args); String[] argList =args; System.out.println( "+++++++++++++Simple Netty HttpFileServer+++++++++++++++" ); System.out.println( "+ VERSION 1.0.1 +" ); System.out.println( "+ AUTHER:XH +" ); System.out.println( "+++++++++++++++++++++++++++++++++++++++++++++++++++++++" ); if (args.length== 0 ){ System.out.println( "Usage: java -var thisPackageName.jar [-options][args...]" ); System.out.println( "Use -h for more infomation" ); System.out.println( "default port is 8080 , webRoot is /root " ); } else { for ( int i= 0 ;i<argList.length;i++){ if (argList[i].equalsIgnoreCase( "-h" )){ System.out.println( "-p your Listern port" ); System.out.println( "-f your webRoot path" ); System.out.println( "Example:java -jar netty-0.0.1-SNAPSHOT.jar -p 80 -f /root" ); return ; } else { if (argList[i].equalsIgnoreCase( "-p" )){ try { HttpFileServer.PORT=Integer.valueOf(argList[i+ 1 ]); } catch (NumberFormatException e){ System.out.println( "wrong number for you port" ); System.out.println( "Use -h for more infomation" ); e.printStackTrace(); return ; } } if (argList[i].equalsIgnoreCase( "-f" )){ try { HttpFileServer.WEBROOT=argList[i+ 1 ]; } catch (Exception e){ System.out.println( "wrong path for you webRoot" ); System.out.println( "Use -h for more infomation" ); e.printStackTrace(); return ; } } } } } try { HttpFileServer.main(); } catch (InterruptedException e) { e.printStackTrace(); } } } |
HttpFileServer
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 | package com.xh.netty; 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; /** * Created by root on 8/14/17. */ public class HttpFileServer { public static String WEBROOT = "/root" ; public static int PORT = 8080 ; public void run( final int port , final String url) throws InterruptedException { EventLoopGroup bossGroup= new NioEventLoopGroup(); EventLoopGroup workerGroup= new NioEventLoopGroup(); try { ServerBootstrap bootstrap= new ServerBootstrap(); bootstrap.group(bossGroup,workerGroup) .channel(NioServerSocketChannel. class ) .childHandler( new ChannelInitializer<SocketChannel>() { protected void initChannel(SocketChannel socketChannel) throws Exception { socketChannel.pipeline().addLast( "http-decoder" , new HttpRequestDecoder()); socketChannel.pipeline().addLast( "http-aggregator" , new HttpObjectAggregator( 65536 )); socketChannel.pipeline().addLast( "http-encoder" , new HttpResponseEncoder()); socketChannel.pipeline().addLast( "http-chunked" , new ChunkedWriteHandler()); socketChannel.pipeline().addLast( "fileServerHandler" , new HttpFileServerHandler(url)); } }); ChannelFuture future = bootstrap.bind( "127.0.0.1" ,port).sync(); System.out.println( "服务器已启动>>网址:" + "127.0.0.1:" +port+url); future.channel().closeFuture().sync(); } catch (Exception e){ e.printStackTrace(); } finally { bossGroup.shutdownGracefully(); workerGroup.shutdownGracefully(); } } public static void main() throws InterruptedException { new HttpFileServer().run(PORT,WEBROOT); } } |
HttpFileServerHandler
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 | package com.xh.netty; import io.netty.buffer.ByteBuf; import io.netty.buffer.Unpooled; import io.netty.channel.*; import io.netty.handler.codec.http.*; import io.netty.handler.codec.http.HttpResponseStatus; import io.netty.handler.stream.ChunkedFile; import io.netty.util.CharsetUtil; import javax.activation.MimetypesFileTypeMap; import java.io.File; import java.io.FileNotFoundException; import java.io.RandomAccessFile; import java.net.URLDecoder; import java.util.regex.Pattern; import static io.netty.handler.codec.http.HttpHeaderNames.*; import static io.netty.handler.codec.http.HttpHeaderUtil.isKeepAlive; import static io.netty.handler.codec.http.HttpHeaderUtil.setContentLength; import static io.netty.handler.codec.http.HttpHeaderValues.KEEP_ALIVE; import static io.netty.handler.codec.http.HttpResponseStatus.*; import static io.netty.handler.codec.http.HttpVersion.HTTP_1_1; /** * Created by root on 8/14/17. */ public class HttpFileServerHandler extends SimpleChannelInboundHandler<FullHttpRequest>{ private final String url; String WEBROOT = HttpFileServer.WEBROOT; public HttpFileServerHandler(String url) { this .url = url; } protected void messageReceived(ChannelHandlerContext channelHandlerContext, FullHttpRequest fullHttpRequest) throws Exception { if (!fullHttpRequest.decoderResult().isSuccess()){ sendError(channelHandlerContext, HttpResponseStatus.BAD_REQUEST); return ; } if (fullHttpRequest.method()!= HttpMethod.GET){ sendError(channelHandlerContext,HttpResponseStatus.METHOD_NOT_ALLOWED); return ; } String uri=fullHttpRequest.uri(); if (uri== null ||uri.trim().equalsIgnoreCase( "" )){ uri= "/" ; } if (uri.trim().equalsIgnoreCase( "/" )){ uri= WEBROOT; } if (!uri.startsWith(WEBROOT)){ uri= WEBROOT +uri; } final String path=sanitizeUri(uri); if (path== null ){ sendError(channelHandlerContext,HttpResponseStatus.FORBIDDEN); return ; } File file= new File(path); if (file.isHidden()||!file.exists()){ sendError(channelHandlerContext,HttpResponseStatus.NOT_FOUND); return ; } if (file.isDirectory()){ if (uri.endsWith( "/" )){ senfListing(channelHandlerContext,file); } else { sendRedirect(channelHandlerContext,uri+ "/" ); } return ; } if (!file.isFile()){ sendError(channelHandlerContext,HttpResponseStatus.FORBIDDEN); return ; } RandomAccessFile randomAccessFile= null ; try { randomAccessFile= new RandomAccessFile(file, "r" ); } catch (FileNotFoundException e){ e.printStackTrace(); sendError(channelHandlerContext,HttpResponseStatus.NOT_FOUND); return ; } Long fileLength=randomAccessFile.length(); HttpResponse httpResponse= new DefaultHttpResponse(HTTP_1_1,OK); setContentLength(httpResponse,fileLength); setContentTypeHeader(httpResponse,file); if (isKeepAlive(fullHttpRequest)){ httpResponse.headers().set(CONNECTION,KEEP_ALIVE); } channelHandlerContext.writeAndFlush(httpResponse); ChannelFuture sendFileFuture = channelHandlerContext.write( new ChunkedFile(randomAccessFile, 0 ,fileLength, 8192 ),channelHandlerContext.newProgressivePromise()); sendFileFuture.addListener( new ChannelProgressiveFutureListener() { public void operationProgressed(ChannelProgressiveFuture future, long progress, long total) { if (total< 0 ){ System.err.println( "progress:" +progress); } else { System.err.println( "progress:" +progress+ "/" +total); } } public void operationComplete(ChannelProgressiveFuture future) { System.err.println( "complete" ); } }); ChannelFuture lastChannelFuture=channelHandlerContext.writeAndFlush(LastHttpContent.EMPTY_LAST_CONTENT); if (!isKeepAlive(fullHttpRequest)){ lastChannelFuture.addListener(ChannelFutureListener.CLOSE ); } } @Override public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception { cause.printStackTrace(); if (ctx.channel().isActive()){ sendError(ctx,INTERNAL_SERVER_ERROR); } } private static final Pattern INSECURE_URI=Pattern.compile( ".*[<>&\"].*" ); public String sanitizeUri(String uri){ try { uri= URLDecoder.decode(uri, "UTF-8" ); } catch (Exception e){ try { uri= URLDecoder.decode(uri, "ISO-8859-1" ); } catch (Exception ew){ ew.printStackTrace(); } } if (!uri.startsWith(url)){ return null ; } if (!uri.startsWith( "/" )){ return null ; } uri=uri.replace( '/' ,File.separatorChar); if (uri.contains(File.separator+ '.' )||uri.startsWith( "." )||uri.endsWith( "." )||INSECURE_URI.matcher(uri).matches()){ return null ; } return uri; //System.getProperty("user.dir")+uri } private static final Pattern ALLOWED_FILE_NAME=Pattern.compile( "[a-zA-Z0-9\\.]*" ); private void senfListing(ChannelHandlerContext channelHandlerContext, File dir) { FullHttpResponse response= new DefaultFullHttpResponse(HTTP_1_1,OK); response.headers().set(CONTENT_TYPE, "text/html;charset=UTF-8" ); StringBuilder builder = new StringBuilder(); String dirPath=dir.getPath(); builder.append( "<!DOCTYPE html> \r\n" ); builder.append( "<html><head><title>" ); builder.append(dirPath); builder.append( "目录:" ); builder.append( "</title></head><body>\r\n" ); builder.append( "<h3>" ); builder.append(dirPath).append( "目录:" ); builder.append( "</h3>\r\n" ); builder.append( "<ul>" ); builder.append( "<li>链接:<a href=\"../\">..</a></li>\r\n" ); for (File f:dir.listFiles()){ if (f.isHidden()||!f.canRead()){ continue ; } String fname=f.getName(); if (!ALLOWED_FILE_NAME.matcher(fname).matches()){ continue ; } builder.append( "<li>链接:<a href=\" " ); builder.append(fname); builder.append( "\" >" ); builder.append(fname); builder.append( "</a></li>\r\n" ); } builder.append( "</ul></body></html>\r\n" ); ByteBuf byteBuf= Unpooled.copiedBuffer(builder, CharsetUtil.UTF_8); response.content().writeBytes(byteBuf); byteBuf.release(); channelHandlerContext.writeAndFlush(response).addListener(ChannelFutureListener.CLOSE); } private void sendRedirect(ChannelHandlerContext channelHandlerContext, String newUri) { FullHttpResponse response= new DefaultFullHttpResponse(HTTP_1_1,FOUND); response.headers().set(LOCATION,newUri); channelHandlerContext.writeAndFlush(response).addListener(ChannelFutureListener.CLOSE); } private void sendError(ChannelHandlerContext channelHandlerContext, HttpResponseStatus status) { FullHttpResponse response= new DefaultFullHttpResponse( HTTP_1_1,status,Unpooled.copiedBuffer( "Failure: " +status.toString()+ "\r\n" , CharsetUtil.UTF_8)); response.headers().set(CONTENT_TYPE, "text/plain; charset=UTF-8" ); channelHandlerContext.writeAndFlush(response).addListener(ChannelFutureListener.CLOSE); } private void setContentTypeHeader(HttpResponse httpResponse, File file) { MimetypesFileTypeMap mimetypesFileTypeMap= new MimetypesFileTypeMap(); httpResponse.headers().set(CONTENT_TYPE,mimetypesFileTypeMap.getContentType(file.getPath())); } } |
打包发布:
cd 到项目target同级目录
mvn clean package
然后 cd target/
java -jar netty-0.0.1-SNAPSHOT.jar -h运行
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