Java-implemented HTTP simple server

Program a bit bug, welcome expert guidance, why different browser difference so big?

After running the server-side program, enter the following request path observation in the browser (the default path for my server resource is set to the F:/project directory).

http://localhost

Http://localhost/myfile.txt

/* * Simulate an implementation of an HTTP server * Client (browser) requests the server's files, the server-side program accepts the connection and processing, writes the corresponding data to the socket, sends to the client * This Web server puts the inbound connection into the pool, A Requestprocessor class instance removes the connection from the pool and processes it */import java.io.*;import java.net.*;p ublic class Jhttp extends Thread{private File Documentrootdirectory;private String indexfilename= "index.html";p rivate serversocket server;private int numThreads = 50;//set the number of server-initiated threads public jhttp (File documentrootdirectory,int port,string indexfilename) throws Ioexception{if (! Documentrootdirectory.isdirectory ()) {throw new IOException (documentrootdirectory+ "does not exist as a directory");} This.documentrootdirectory=documentrootdirectory;this.indexfilename=indexfilename;this.server=new ServerSocket ( Port);} Public Jhttp (File documentrootdirectory,int Port) throws Ioexception{this (Documentrootdirectory,port, "index.html");} Public jhttp (File documentrootdirectory) throws Ioexception{this (documentrootdirectory,80, "index.html");} public void Run () {///opens the thread that handles the request, which pulls a socket connection from the socket pool for data transfer for (int i=0;i<numthreads;i++) {thread T=neW Thread (New Requestprocessor (Documentrootdirectory, Indexfilename)); T.start ();} SYSTEM.OUT.PRINTLN ("Accepting connections on port" +server.getlocalport () + "..."); System.out.println ("Document Root:" +documentrootdirectory);//The server continuously accepts the request while (true) {try {Socket connection= Server.accept (); Requestprocessor.processrequest (connection);} catch (IOException e) {//TODO auto-generated catch Blocke.printstacktrace ();}}} public static void Main (string[] args) {file docroot;//gets the document root Docroot=new file ("F:\\project");//Set the listener port of the server int port;port= 80;try {jhttp webserver=new jhttp (docroot,port); Webserver.start ();} catch (IOException e) {System.out.println ("Server Could not start because of an "+e.getclass ()); System.out.println (e);}}

Thread class for specific processing connections import Java.util.date;import Java.util.linkedlist;import java.util.list;import Java.util.stringtokenizer;import Java.io.*;import Java.net.socket;public class Requestprocessor implements Runnable { private static List pool = new LinkedList ();p rivate File documentrootdirectory;private String indexfilename = "index.html" ;p ublic requestprocessor (File documentrootdirectory, String indexfilename) {if (Documentrootdirectory.isfile ()) { throw new IllegalArgumentException ("Documentrootdirectory must be a directory,not a file");} This.documentrootdirectory = documentrootdirectory;//Returns the canonical form of this abstract path name try {this.documentrootdirectory = Documentrootdirectory.getcanonicalfile ();} catch (IOException e) {System.out.println (e);} if (indexfilename! = null) {this.indexfilename = Indexfilename;}} public static void ProcessRequest (socket request) {//will place the socket connection corresponding to each client in the pool, notifying the thread to process their synchronized (pool) {Pool.add ( Pool.size (), request);p Ool.notifyall ();}} @Overridepublic void Run () {//Perform security checks, the requested document cannot exceed the root directory sTring root = Documentrootdirectory.getpath ();//Because of the thread pool policy, threads have to be executed continuously to handle connections in the client's request pool (socket pool) while (true) {socket Connection;synchronized (Pool) {while (Pool.isempty ()) {try {pool.wait ()} catch (Interruptedexception e) {//TODO auto-g Enerated catch Blocke.printstacktrace ();}} Connection = (Socket) pool.remove (0);} The data exchange of the server client via the socket is a try {outputstream Raw;raw = new Bufferedoutputstream (Connection.getoutputstream ()); Writer out = new OutputStreamWriter (raw); Reader in = new InputStreamReader (New Bufferedinputstream (Connection.getinputstream ()), "ASCII");// Stores the first row of data requested by the client StringBuffer requestline = new StringBuffer (), int c;while (true) {c = In.read (); if (c = = ' \ r ' | | c = = ' \ n ') BR Eak;requestline.append ((char) c);} String get = requestline.tostring (); System.out.println (get);//record the first line of the request (to do some decomposition on the line, as below) StringTokenizer st = new StringTokenizer (get); String method = St.nexttoken (); String version = "";//This case currently only handles get request string filename; String contenttype;if (method.equals ("GET")) {filename = ST.NExttoken (); if (Filename.endswith ("/")) filename + = Indexfilename;contenttype = Guesscontenttypefromname (filename); if (St.hasmoretokens ()) {Version = St.nexttoken ();} File Thefile = new file (documentrootdirectory,filename.substring (1, Filename.length ())); if (Thefile.canread () & & Thefile.getcanonicalpath (). StartsWith (Root)) {DataInputStream FIS = new DataInputStream (New Bufferedinputstream (New FileInputStream (thefile))); byte[] Thedata = new byte[(int) thefile.length ()];fis.readfully (thedata); Fis.close (); if (Version.startswith ("HTTP")) {//Send MIME header out.write ("http/1.0 ok\r\n");//The header format specified in the HTTP protocol is to require a carriage return for a newline, it must be \r\ndate now = new Date (); Out.write ("Date:" + Now + "\ r \ n"), Out.write ("server:jhttp/1.0\r\n"), Out.write ("content-length:" + thedata.length+ "\ r \ n"); Out.write (" Content-type: "+ contenttype+" \r\n\r\n ");//Remember to refresh at the end, write buffer remaining data}//send the actual requested file (possibly a picture or other binary file) Raw.write ( Thedata); Raw.flush ();} else {//Cannot find file if (Version.startswith ("HTTP")) {//Send MIME header out.write ("http/1.0 404File not Found on myserver\r\n ");//The header format specified in the HTTP protocol, which requires a carriage return, must be \r\ndate now = new Date () and Out.write (" Date: "+ now +" \ r \ n "); Out.write ("server:jhttp/1.0\r\n"); Out.write ("content-type:text/html\r\n\r\n");} Out.write ("


Java-implemented HTTP simple server