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+!( 7" +1 0+ " & " # ($" 5 +" ($ 0++1!&" 4!*!/0 58 0+)& 0$ (+ "? $ 7 + ++ 7 $0/#)0& +0" 5 )&" 0 4 7 & 0" 5 )& 0$1(! $!, &( ($ & *+" && & 1 &$ + B )&" & (& ". 0 0$0 &("5/ 4 " 5 & $ 07 +/0$"X!! 0/ & 70 &!$*+"!." M + 0+ 7 +1 G!Y 5 )&" 0& (, K9B #9 H $ 9B <GL 5+(, if (templine.touppercase().startswith("maxconnections")){ int index=templine.lastindexof("="); buffersize=integer.parseint(templine.substring(index+1)); catch (Exception ex){ System.out.println("Config(): Set maxconnections to "+buffersize); 5$00?&( 7 +! 0$ +" IOJ!$ & &" 58 0 $ 7& 7! +, ;2

A 5 & & +7 70 "5& & &" G8 1 5G 0+ 7+1" 6+ 1 #!& /" @$ : +1 & ( "#7!$" $00? 570 +$00" 5+0 $ " 4!*!/: ($+++!!"5 ($$ $&(($*(!$+!!.4 + "Z ($(+ " public static void main(string args[]) { WebServer myserver=new WebServer(); myserver.serve(args); 5#++01($&& 1"5+ $ & +! + + 1 +" 5 + $ $+ 0 7, $ +<>>>/++" 5 ($ +! + &( $ &)& 0$1(!"5+ $!#&' *& 0$. + " 1/ 7 1 1 +$ 0 1! 0 ++ 10 1!" ServerSocket srvr = new ServerSocket(port); System.out.println( "Serving requests on port "+port+"..." ); Socket tempclientsocket; (# *+ 5 $!$ $ %& +"5";"+!&7+1( ;D

($ && $$ 0 " 5 11+ ($ & +! + 0$& 7 1 & 0$ + "! + 1!&7)& 10" 0$ & +$ (&!(& &0$( +" &$ & + & 8C 7+$ "Z (& & " A $ # 2 +$!$ & ( 0 1 0+1$ &(!$" ServerThread tempthread; while( true ) { if (ConnectionManager.getNrOfConnections()<Config.maxConnections){ tempclientsocket = srvr.accept(); tempthread=new ServerThread (tempclientsocket); System.out.println("Accepting connection, this is nr. "+ConnectionManager.getNrOfConnections()); ConnectionManager.addConnection(); tempthread.start(); else{ System.out.println("Error: too many connections, denying request."); 0 7 7 +/ 0$1( G +1" 5 ($ 1 0 1!& & # 2 + +!$ "5+1 &!!!($ &!$" '! 7 0$ 0$ "5%&7!7(&! +! 70$"5 &$ # 2 (!!$+ 0" 5 ( 0 70 1 1(" ;H

4!4!6"2 5 $ & 1 & ( 0 1! 7 3 +$!$ " + # & / " 5 &(*5 (!$., ($ 0$ %& 7! &! 0$ (" 7 7! #:A! &" %& / 7 &! 4 " 5 7 7 " 7!$ $ " outtoserver = new PrintStream(clientSocket.getOutputStream() ); infromserver = new BufferedReader(new InputStreamReader( clientsocket.getinputstream())); 5 & +,, & +, ($ 17 $( & 7 0 &(( / &" 5 /4!$(+ (!$ $ "1 $47/1 $ &! / 47 I $J /0$ $ $! &B+" ($ & ( / 4, #))))) &" 5 / 47 I $ J 0 &( & & +$00 &(" $ / &$ $#-($ &&"5-E ( ( ($ & 0$(&! &( + " + 1 $ ( & " 5 & &$ "'! 1 & & 0!1(B $ 7& " 5 7.#),)+ & &!$" 5 7! IJ &!$#*($B F'8 H;H! I2>> K FV$J $ $ & 456,($" ;=

5 & ($ & $ *& ( &( 0.0!7 1 (" ((,-.,/0 5 ($ 7 + &$ 7 70 (!! &&& 7 +/ " 1 $& " M 7 & I511+/ 1 J/I+J! I+BVO>J! +0!&" for (int i=0; i<requests.size();i++){ if ((requests.get(i).tostring().touppercase().startswith("accept- ENCODING")) && (requests.get(i).tostring().touppercase().indexof("gzip")!=-1)) { clientsupportsgzip = true; if ((requests.get(i).tostring().touppercase().indexof("gzip;q=0.") ==-1) && (requests.get(i).tostring().touppercase().indexof ("GZIP;Q=0")!=-1)){ clientsupportsgzip = false; 57D"+ 7& 01(" &7!$ +70/!&!&0!1, $ $ &! & +$" 5 4 &1#:A0/$ IG- J+$ +$ " infile=new FileInputStream(requestedFile); outtoserver.print("http/1.1 200 OK\r\n"); currentdate=new Date(); outtoserver.print("date: "+currentdate.togmtstring()+"\r\n"); outtoserver.print("server: Mini WebServer v."+config.version+"\r\n"); outtoserver.print("content-type: text/html\r\n"); 5 70& +$00 &&" 4!$ ($ && 0! ( ;R

*8FTA'A'.70$ 70($ (! &(" 5 +$00 + ( &$ $ +$ 7 ( " 5 $) ($ & &$ 0/ (!& 1!" byte [] buffer = new byte[config.buffersize]; try{ int numbytes = infile.read(buffer, 0, Config.bufferSize); while (numbytes!= -1) { outtoserver.write(buffer, 0, numbytes); numbytes = infile.read(buffer, 0, Config.bufferSize); 5%&&4 7!& 4"# 0 $"$,7&( 7 2 &! I2>2E'M'$ J " 5?& &($ +1 + + " 1 &! 8 1 : # ($ && 1 & & +1 " 5 & ($ (Q1 3 &!" 4!;!/:3"%3"# 5 & 4 70$ ( &*+" 8+1 (1&." (&(+7& ( & & $" X 70 +$ IJ +1 & G 0 ( +1 " G +1 IJ + +1!+1 0 $ " 5+ " Q1 3 1 $&! ": +1 0 $ Q1 3/ 0 0! +1 &" 5 & 0$1(! 7 &1 +1!$" ;<

5 Q1 3 7&( 0 $( &( +1 +1 & " 8C/7& &7" public void run(){ while (canrun){ sleep (3000); catch (InterruptedException ex) { counter+=3; if (counter >= Config.timeOut){ theserver.killconnection(); canrun=false; # ( 0$1( Q1 3 +1!+7!$&($ &&!+1" 5($ $("5( &$ & ($"' & 0$1(!,, & +$00 &$ $/ 70$ +$00 & & $Q1 37+&!+1" +1 5, 7&( 0!$ Q1 30!0$" ;! 8 5 7! # 0 7 "! ( 6+ & CM9P 8+ &! 07 0!11! *+" 8 / 1, +. 70 (! + ( &+ 01&! " >

5! )&! & "A!$! &7/$++17! " ;!+!.3 5 %& 47 4 &" : *8,, 47 & 1! 0 " 5 *8,,!&"$"+ 1 (" outtoserver.flush(); mywatchdog.reset(); gzout=new GZIPOutputStream (outtoserver); int numbytes = infile.read(buffer, 0, Config.bufferSize); while (numbytes!= -1) { mywatchdog.reset(); gzout.write(buffer, 0, numbytes); numbytes = infile.read(buffer, 0, Config.bufferSize); gzout.close(); 5, #),2 &!$ +$00 ( 1 & &" 5%& $ 7 1 +, ($&, # ($&!$ "' *8,, + & 7&7! $ $ & 1! 69 0!1 $ & "51 +,) &!$" ;!(!8 5 0/ 7! & "! 4+1&! +" 5 8C!! &!$ 0/ & B& & " X +$( 07 07 &" (+1! " 11 ;

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<=9:68 9:68 28 /** Mini Web-Server *This is a mini web server for demonstration purposes. *It is written by Istvan Farkas with the very useful help of Gabor Paller. */ import java.io.*; import java.net.*; import java.util.*; import java.util.zip.gzipoutputstream; import java.text.*; class WatchDog extends Thread{ private ServerThread theserver; private int counter=0; private boolean canrun=true; WatchDog(ServerThread theserver){ this.theserver=theserver; this.setdaemon(true); public void reset(){ counter=0; public void disable (){ canrun=false; public void run(){ while (canrun){ sleep (3000); catch (InterruptedException ex) { counter+=3; if (counter >= Config.timeOut){ theserver.killconnection(); canrun=false; // run //---------------------------------------------------------- class ServerThread extends Thread{ private Socket clientsocket; private Vector requests; // vector of all lines of request private Vector currentrequest; // elements of request line being parsed private String beforelaststringread,laststringread; // the last string read while reading the req private PrintStream outtoserver; private GZIPOutputStream gzout; private BufferedReader infromserver; private Date currentdate; //will get value when comm ing with client private StringTokenizer tokenizer=null; //used to tokenize the current

private WatchDog mywatchdog; request ServerThread (Socket clientsocket){ this.clientsocket=clientsocket; requests=new Vector(); currentrequest=new Vector(); mywatchdog=new WatchDog(this); mywatchdog.start(); public void serveget(){ String filename=null; // name of requested file File requestedfile=null; //the requested file as an object FileInputStream infile=null; boolean clientsupportsgzip=false; // Now serving a get. At the call of this function, currentrequest contains line 1 of the request. if (currentrequest.get(1).tostring().equals("/")) { filename = "index.html"; else { filename = currentrequest.get(1).tostring(); System.out.println("serveGet(): Requested filename: "+filename); //now detect whether client supports gzip for (int i=0; i<requests.size();i++){ if ((requests.get(i).tostring().touppercase().startswith("accept- ENCODING")) && (requests.get(i).tostring().touppercase().indexof("gzip")!=-1)) { clientsupportsgzip = true; if ((requests.get(i).tostring().touppercase().indexof ("GZIP;Q=0.")==-1) && (requests.get(i).tostring().touppercase(). indexof ("GZIP;Q=0")!=-1)){ clientsupportsgzip = false; // false if q=0 but not q=0.x requestedfile=new File(Config.basePath,fileName); infile=new FileInputStream(requestedFile); mywatchdog.reset(); outtoserver.print("http/1.1 200 OK\r\n"); currentdate=new Date(); outtoserver.print("date: "+currentdate.togmtstring()+"\r\n"); outtoserver.print("server: Mini WebServer v."+config.version+"\r\n"); outtoserver.print("content-type: text/html\r\n"); if (Config.enableGZipEncoding && clientsupportsgzip) { outtoserver.print("content-encoding: gzip\r\n"); else { outtoserver.print("content-length: "+requestedfile.length()+"\r\n"); outtoserver.print("\r\n"); 2

if (Config.enableGZipEncoding && clientsupportsgzip){ //GZipped byte [] buffer = new byte[config.buffersize]; try{ outtoserver.flush(); mywatchdog.reset(); gzout=new GZIPOutputStream (outtoserver); int numbytes = infile.read(buffer, 0, Config.bufferSize); while (numbytes!= -1) { mywatchdog.reset(); gzout.write(buffer, 0, numbytes); numbytes = infile.read(buffer, 0, Config.bufferSize); gzout.close(); catch (IOException ioex){ System.out.println("DEBUG: Exception occured while GZiptransferring file."); ioex.printstacktrace(); else { //normal, uncompressed transfer byte [] buffer = new byte[config.buffersize]; try{ mywatchdog.reset(); int numbytes = infile.read(buffer, 0, Config.bufferSize); while (numbytes!= -1) { mywatchdog.reset(); outtoserver.write(buffer, 0, numbytes); numbytes = infile.read(buffer, 0, Config.bufferSize); catch (IOException ioex){ System.out.println("DEBUG: Exception occured while transferring file."); ioex.printstacktrace(); // end of else infile.close(); catch (Exception ex){ System.out.println("DEBUG: error occured while closing input file"); catch (FileNotFoundException ex){ // 404 String messagecontent="<html>\n<h1>404 - File Not Found</H1>\n"+ "Mini WebServer could not find the file you requested.<br>\n"+ "The filename you specified was: <strong>"+filename+ "</strong><br>\nplease try again.<br><br>mini WebServer v."+config.version+ " - written by Istvan Farkas in 2003\n"+ "<br>many heartfelt thanks to Gabor Paller. </HTML>"; mywatchdog.reset(); outtoserver.print("http/1.1 404 File Not Found\r\n"); currentdate=new Date(); outtoserver.print("date: "+currentdate.togmtstring()+"\r\n"); outtoserver.print("server: Mini WebServer D

v."+config.version+"\r\n"); outtoserver.print("content-type: text/html\r\n"); outtoserver.print("content-length: "+messagecontent.length()+"\r\n\r\n"); outtoserver.print(messagecontent); return; public void tellbadrequest (){ // Called on unsupported HTTP command String messagecontent = "<HTML>\n<H1>400 - Bad Request</H1>\n" + "Sorry, but Mini WebServer does not support the HTTP command you requested.<br>\n" + "\nplease try again.<br><br>mini WebServer v."+config.version + " - written by Istvan Farkas in 2003\n" + "<br>many heartfelt thanks to Gabor Paller. </HTML>"; mywatchdog.reset(); outtoserver.print("http/1.1 400 Bad Request\r\n"); currentdate = new Date(); outtoserver.print("date: " + currentdate.togmtstring()+"\r\n"); outtoserver.print("server: Mini WebServer v." + Config.version+"\r\n"); outtoserver.print("content-type: text/html\r\n"); outtoserver.print("content-length: " + messagecontent.length() + "\r\n\r\n"); outtoserver.print(messagecontent); return; catch (Exception ex) { System.out.println("DEBUG: Exception occured while writing to outtoserver"); public void killconnection(){ // to terminate connection System.out.println("ERROR: No active transfer for the determined timeout period - closing socket."); System.out.println("Closing connection on port "+clientsocket.getport()+" with address: "+clientsocket.getinetaddress()); ConnectionManager.removeConnection(); try{ clientsocket.close(); catch (Exception ex){ System.out.println("Debug: exception occured while closing the timed out transfer socket."); public void run(){ System.out.println("Activated connection on port "+clientsocket.getport()+" with address: "+clientsocket.getinetaddress()); outtoserver = new PrintStream( clientsocket.getoutputstream() ); infromserver = new BufferedReader( new InputStreamReader( clientsocket.getinputstream())); //now read all requests into a vector do { H

laststringread=infromserver.readline(); requests.add(laststringread); catch (IOException ex){ while ((laststringread.length()>0)); tokenizer=new StringTokenizer((String)requests.get(0)); while (tokenizer.hasmoretokens()) { currentrequest.add(tokenizer.nexttoken()); // Calls to serve different HTTP commands if (currentrequest.get(0).tostring().touppercase().startswith("get")) { serveget(); // else if... else { // Unsupported command tellbadrequest(); // The approriate function has finished serving request, now close connection. System.out.println("Closing connection on port "+clientsocket.getport()+" with address: "+clientsocket.getinetaddress()); ConnectionManager.removeConnection(); mywatchdog.disable(); clientsocket.close(); // The Thread will finish after this point. catch (IOException ex){ ex.printstacktrace(); //-------------------------------------------------------------------- class Config{ //here we declare the config variables as static ones. We also give them default values. static final String version="0.2"; static String basepath="."; // the directory from which we are serving files static int buffersize=1024; static int maxconnections=64; static boolean enablegzipencoding=true; static int timeout=60; Config(){ //The constructor will read config from WebServer.ini BufferedReader inifile=null; inifile = new BufferedReader( new FileReader("WebServer.ini")); catch (FileNotFoundException ex){ System.out.println("Unable to read WebServer.ini, falling back to default configuration values..."); return; String templine=null; // the last line we read while parsing ini file do { =

templine=inifile.readline(); if (templine.touppercase().startswith("basepath")){ int index=templine.lastindexof("="); basepath=templine.substring(index+1); System.out.println("Config(): Set basepath to "+basepath); if (templine.touppercase().startswith("buffersize")){ int index=templine.lastindexof("="); buffersize=integer.parseint(templine.substring(index+1)); catch (Exception ex){ System.out.println("Config(): Set buffersize to "+buffersize+ " bytes"); if (templine.touppercase().startswith("maxconnections")){ int index=templine.lastindexof("="); buffersize=integer.parseint(templine.substring(index+1)); catch (Exception ex){ System.out.println("Config(): Set maxconnections to "+buffersize); if (templine.touppercase().startswith("enablegzipencoding")){ int index=templine.lastindexof("="); if (Integer.parseInt(tempLine.substring(index+1))==0) enablegzipencoding=false; catch (Exception ex){ System.out.println("Config(): Set enablegzipencoding to "+enablegzipencoding); if (templine.touppercase().startswith("timeout")){ int index=templine.lastindexof("="); timeout=integer.parseint(templine.substring(index+1)); catch (Exception ex){ if (timeout<10) timeout=10; System.out.println("Config(): Set timeout to "+timeout+" seconds."); catch (Exception ex){ while (templine!= null); //---------------------------------------------------------------------- class ConnectionManager{ private static int nrofconnections=0; public static void addconnection(){ nrofconnections++; R

public static void removeconnection(){ if (nrofconnections!=0) { nrofconnections--; public static int getnrofconnections(){ return nrofconnections; //---------------------------------------------------------------------- public class WebServer { int port=9000; // Where we are listening, default value is 9000 public void serve(string args[]){ System.out.println("\nSimple WebServer version "+Config.version+" \n"); port=integer.parseint(args[0]); catch (Exception ex){ System.out.println("Error parsing input port from args[0], falling back to default (9000)."); Config myconfig=new Config(); ServerSocket srvr = new ServerSocket(port); System.out.println( "Serving requests on port "+port+"..." ); Socket tempclientsocket; ServerThread tempthread; while( true ) { if (ConnectionManager.getNrOfConnections()<Config.maxConnections){ tempclientsocket = srvr.accept(); tempthread=new ServerThread (tempclientsocket); System.out.println("Accepting connection, this is nr. "+ConnectionManager.getNrOfConnections()); ConnectionManager.addConnection(); tempthread.start(); else { System.out.println("Error: too many connections, denying request."); catch( IOException ex ) { ex.printstacktrace(); System.out.println("Could not create server socket, maybe already in use."); return; public static void main(string args[]) { WebServer myserver=new WebServer(); myserver.serve(args); //---------------------------------------------------------------------- <

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