<?php

//*******************************************************************

//php_http_server_generic represents a basic http server

//*******************************************************************

//by John Heinstein

//johnkarl@nbnet.nb.ca

//*******************************************************************

//Version 0.1

//copyright 2004 Engage Interactive

//http://www.engageinteractive.com/dom_xmlrpc/

//All rights reserved

//*******************************************************************

//Licensed under the GNU General Public License (GPL)

//http://www.gnu.org/copyleft/gpl.html

//*******************************************************************



if (!defined('PHP_HTTP_TOOLS_INCLUDE_PATH')) {

	define('PHP_HTTP_TOOLS_INCLUDE_PATH', (dirname(__FILE__) . "/"));

}



define ('CRLF', "\r\n"); //end-of-line char as defined in HTTP spec

define ('CR', "\r");

define ('LF', "\n");



class php_http_server_generic {

	var $httpStatusCodes;



	var $protocol = 'HTTP';

	var $protocolVersion = '1.0';

	var $statusCode = 200;



	var $events = array('onRequest' => null, 'onResponse' => null,

						'onGet' => null, 'onHead' => null,

						'onPost' => null, 'onPut' => null);



	function php_http_server_generic() {

		//require_once(PHP_HTTP_TOOLS_INCLUDE_PATH . 'php_http_status_codes.php');

		//$this->httpStatusCodes =&new php_http_status_codes();

	} //php_http_server_generic



	function &getHeaders() {

		$headers = headers_list();

		$response = '';



		if (count($headers) > 0) {

			foreach ($headers as $key => $value) {

				$response .= $value . CRLF;

			}

		}



		return $response;

	} //getHeaders



	function setProtocolVersion($version) {

		if (($version == '1.0') || ($version == '1.1')) {

			$$this->protocolVersion = $version;

			return true;

		}



		return false;

	} //setProtocolVersion



	function setHeader($name, $value) {

		header($name . ': ' . $value);

	} //setHeader



	function setHeaders() {

		//you will want to override this method

		$this->setHeader('Content-Type', 'text/html');

		$this->setHeader('Server', 'PHP HTTP Server (Generic)/0.1');

	} //setHeaders



	function fireEvent($target, $data) {

		if ($this->events[$target] != null) {

			call_user_func($this->events[$target], $data);

		}

	} //fireEvent



	function fireHTTPEvent($target, $data = null) {

		if ($this->events[$target] == null) {

			//if no handler is assigned,

			//delegate the event to the default handler

			$this->setHTTPEvent($target);

		}



		call_user_func($this->events[$target], $data);

	} //fireHTTPEvent



	function setHTTPEvent($option, $customHandler = null) {

		if ($customHandler != null) {

			$handler =& $customHandler;

		}

		else {

			$handler = array(&$this, 'defaultHTTPEventHandler');

		}



		switch($option) {

			case 'onGet':

			case 'onHead':

			case 'onPost':

			case 'onPut':

				$this->events[$option] =& $handler;

				break;

		}

	} //setHTTPServerEvent



	function defaultHTTPHandler() {

		//will add functionality for this later

		//work with subclasses for the time being

	} //defaultHTTPHandler



	function setDebug($option, $truthVal, $customHandler = null) {

		if ($customHandler != null) {

			$handler =& $customHandler;

		}

		else {

			$handler = array(&$this, 'defaultDebugHandler');

		}



		switch($option) {

			case 'onRequest':

			case 'onResponse':

				$truthVal ? ($this->events[$option] =& $handler) :

							($this->events[$option] = null);

				break;

		}

	} //setDebug



	function getDebug($option) {

		switch($option) {

			case 'onRequest':

			case 'onResponse':

				return ($this->events[$option] != null);

				break;

		}

	} //getDebug



	function defaultDebugHandler($data) {

		//just write to a log file, since can't display in a browser

		$this->writeDebug($data);

	} //defaultDebugHandler



	function writeDebug($data) {

		$filename = 'debug_' . time() . '.txt';

		$fileHandle = fopen($fileName, 'a');

		fwrite($fileHandle, $data);

		fclose($fileHandle);

	} //writeDebug



	function receive() {

		global $HTTP_SERVER_VARS;

		$requestMethod = strToUpper($HTTP_SERVER_VARS['REQUEST_METHOD']);



		switch ($requestMethod) {

			case 'GET':

				$this->fireHTTPEvent('onGet');

				break;



			case 'HEAD':

				$this->fireHTTPEvent('onHead');

				break;



			case 'POST':

				$this->fireHTTPEvent('onPost');

				break;



			case 'PUT':

				$this->fireHTTPEvent('onPut');

				break;

		}

	} //receive



	function respond($response) {

		//build header info

		//$response = $this->protocol . '/' . $this->protocolVersion . ' ' .

					//$this->statusCode . ' ' . $this->httpStatusCodes->getCodeString($this->statusCode) . CRLF;



		if (!headers_sent()) { //avoid generating an error when in debug mode

			$this->setHeader('Date', "date('r')");

			$this->setHeader('Content-Length', strlen($response));

			$this->setHeader('Connection', 'Close');

		}



		echo $response;

	} //respond

} //php_http_server_generic





//To invoke the server, do:

//$httpServer = new php_http_server_generic(); //or instance of a subclass

//$httpServer->receive();



?>