File: foo_callback_server.php

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File: foo_callback_server.php
Role: Example script
Content type: text/plain
Description: A funny FOO server, demonstrates how to use the Callback based interface of SimpleServerCallback.class.php
Class: Simple Server
Implement TCP socket servers
Author: By
Last change:
Date: 14 years ago
Size: 4,948 bytes
 

 

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<?php
/***************************************************************************
 * SimpleServer Example 3
 * ----------------------
 * begin : Saturday, Dec 18, 2004 - 17:30
 * copyright : (C) 2004 MC Breit
 * email : support@mcb.cc - MCB.CC - Free and Open Sources
 * last modified : 18/12/04 - 18:01 - MC Breit
 * version : 1.0.0
 *
 ***************************************************************************/

/***************************************************************************
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 ***************************************************************************/

/***************************************************************************
 *
 * This example will show how easy to create your own Callback Based Server
 *
 * What should our FOO Server do?
 * Our FOO Server should listen to port 8000 on the local ip address
 * 127.0.0.1 and waiting for clients conntcting in.
 * While a client is connected, it should wait that the client is
 * sending a "\r\n" and the return the message the cleint sended before.
 * If the client entered "SHUTDOWN" it should close the connection to the
 * client and say "Bye bye..".
 * When the client types "FOO" it should print "BAR" and remove the handle
 * of foo, but should initiate a handle to "BAR". Then if "BAR" was typed
 * by the client the same should happend in reverse was..
 *
 * To test the server, you can run it using the console and run telnet
 * in an other console window.
 * Then connect to "127.0.0.1 port 8000" with telnet and type anything.
 * For example under Windows you can exec "cmd" and then type in:
 * C:\> telnet 127.0.0.1 8000
 * After that you should see the welcome message.
 * Now, to test the server you can type the following:
 * FOO is cool!
 * FOO Rulez, yeha!
 * BAR is nice to, well..
 * FOO
 * BAR BAR BAR BAR!
 * FAZ
 * SHUTDOWN
 * Should produce some output like these:
 * >> C:\> telnet 127.0.0.1 8000
 * Welcome to my FOO Server!
 * >> FOO is cool!
 * BAR: is cool!
 * >> FOO Rulez, yeha!
 * Unknown signal: FOO
 * >> BAR is nice too, well..
 * FOO: is nice too, well..
 * >> FOO
 * BAR:
 * >> BAR BAR BAR BAR!
 * FOO: BAR BAR BAR!
 * >> FAZ
 * Unknown signal: FAZ
 * >> SHUTDOWN
 * ByeBye
 *
 * Connection lost.
 * C:\> _
 *
 * !! Important: Dont forget your firewall settings while testing !!
 ***************************************************************************/
 
//Kill the max_ex_time (on pure installations not needed)
set_time_limit(0);

//Including the main class..
include('SimpleServerCallback.class.php');

//Creating a new server object using port 8000 and the local ip "127.0.0.1".
$srv = &new SimpleServerCallback(8000, '127.0.0.1');

//Register our callbacks..
$srv->register_callback(SSRV_CBS_CON, 'say_hello'); //The connected in signal..
$srv->register_callback('FOO', 'callback_foo'); //The "FOO" signal..
$srv->register_callback('SHUTDOWN', 'callback_shutdown'); //THe "SHUTDOWN" signal..
$srv->register_callback(SSRV_CBS_DEF, 'callback_default'); //All the unknown signals..

//Main loop to listen for clients..
$srv->main();

//Any errors inside the main loop?
if( $error = $srv->get_error_str() )
{
  print
$error;
}

//The functions we use to handle the callbacks..
function say_hello(&$srv, $signal, $params)
{
 
//Say hello to the new client..
 
$srv->put('Welcome to my FOO Server!'."\r\n");
  return
TRUE;
}

function
callback_foo(&$srv, $signal, $params)
{
 
//Return "BAR: .."
 
$srv->put('BAR: '."$params\r\n");
 
//Register the BAR signal..
 
$srv->register_callback('BAR', 'callback_bar');
 
//Return FALSE to unregister the own signal..
 
return FALSE;
}

function
callback_bar(&$srv, $signal, $params)
{
 
//Return "FOO: .."
 
$srv->put('FOO: '."$params\r\n");
 
//Register the FOO signal..
 
$srv->register_callback('FOO', 'callback_foo');
 
//Return FALSE to unregister the own signal..
 
return FALSE;
}

function
callback_shutdown(&$srv, $signal, $params)
{
 
//Send the Bye bye.. message to client..
 
$srv->put('ByeBye');
 
//Quit from main loop..
 
$srv->main_quit();

  return
TRUE;
}

function
callback_default(&$srv, $signal, $params)
{
 
//Tell the client that I dont know about this signal..
 
$srv->put('Unknown signal: '.$signal."\r\n");
 
  return
TRUE;
}

?>


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