Java Socket Programming (III)

Programming server Sockets





List 9.2 is part of a server application.





List 9.2 A simple server program





/**


* A program that listens on ports and provides HTML documents.


*/


class Simplewebserver {


public static void Main (String args[])


{


ServerSocket serversocket = null;


Socket clientsocket = null;


int connects = 0;


Try


{


{


//Set up a server socket


ServerSocket = new ServerSocket (80, 5);


while (connects < 5)


{


//Waiting for connection


clientsocket = serversocket.accept ();


//Service Connection


serviceclient (Clientsocket);


connects++;


}


Serversocket.close ();


}


catch (IOException IoE)


{


System.out.println ("Error in Simplewebserver:" + IoE);


}


}


public static void ServiceClient (Socket client)


throws IOException


{


DataInputStream inbound = null;


DataOutputStream outbound = null;


Try


{


//Get IO stream


inbound = new DataInputStream (Client.getinputstream ());


outbound = new DataOutputStream (Client.getoutputstream ());


//Formatted output (response headers and very few HTML documents)


StringBuffer buffer = Prepareoutput ();


String Inputline;


while ((Inputline = Inbound.readline ())!= null)


{


//If the tail of the HTTP request is sent, send a response


if (Inputline.equals (""))


{


outbound.writebytes (buffer.tostring ());


break;


}


}


}


finally


{


//Clear


System.out.println ("Cleaning up connection:" + client);


tln ("Cleaning up connection:" + client);


Outbound.close ();


Inbound.close ();


Client.close ();


Client.close ();


}


}