File: clsHtmlSource.php

<?
/*
************************************************************************
* © Sloppycode.net All rights reserved.
*
* This is a standard copyright header for all source code appearing
* at sloppycode.net. This application/class/script may be redistributed,
* as long as the above copyright remains intact. 
* Comments to sloppycode@sloppycode.net
************************************************************************
*/

/**
 * @title Html Source class - api for getting/posting to websites
 * @author C.Small
 * @version 1.0
 *
 * - HTTP 1.0 specs - http://www.w3.org/Protocols/rfc1945/rfc1945]
 * - Easier to read version at http://www.ics.uci.edu/pub/ietf/http/rfc1945.html
 */
Class HtmlSource
{
	/* All vars are public */
	
	// Common
	var $host;
	var $port = 80;
	var $page;
	var $request;
	var $httpversion;
	var $method = "GET";
	var $timeout = 30;
	
	var $striptags;
	var $showsource;
	var $strip_responseheader = true;
	
	// Cookie
	var $cookies = array();
	
	// GET
	var $getvars = array();
	
	// POST
	var $postvars = array();
	
	// Request fields
	var $accept;         //format: Accept: */*
	var $accept_encoding;//format: gzip,deflate 
	var $accept_language;//format: en-gb 
	var $authorization;  //format: username:password
	var $content_length; //format: 40 (for POST)
	var $content_type;   //format: application/x-www-form-urlencoded
	var $date;           //format: Date: Tue, 15 Nov 1994 08:12:31 GMT
	var $referer;        //format: Referer: http://www.domain.com
	var $useragent;      //format: User-Agent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0)
	
	function addPostVar($name,$value)
	{
		if (!empty($name) && !empty($value))
		{
			$this->postvars[] =$name."=".$value;
		}
	}
	function addGetVar($name,$value)
	{
		if (!empty($name) && !empty($value))
		{
			$this->getvars[] = $name."=".$value;
		}
	}
	function addCookie($name,$value)
	{
		if (!empty($name) && !empty($value))
		{
			$this->cookies[] = $name."=".$value;
		}
	}
	function getSource()
	{
		// Error check
		if (empty($this->httpversion))
		{
			$this->httpversion = "1.0";
		}
		if (empty($this->method))
		{
			$this->method = "GET";
		}
		
		// Make GET variables
		$vars   = "";
		$cookiehead = "";
		if (sizeof($this->getvars) >0 && $this->method == "GET")
		{
			$vars  = "?";
			$vars .= join($this->getvars,"&");
			// Knock last '&' off
			// Remove this..?
			if (sizeof($this->getvars) >1)
			{
				$vars = substr($vars,0,strlen($vars) -1);
			}
		}
		// Make POST variables
		if (sizeof($this->postvars) >0 && $this->method == "POST")
		{
			$vars  = "\r\n";
			$strpostvar = join($this->postvars,"&");
			$vars .= $strpostvar;
			$vars .= "\r\n";
		}
		
		// Make Cookies
		if (sizeof($this->cookies) >0)
		{
			$cookiehead  = "Cookie: ";
			$cookiehead .= join($this->cookies,"; ");
			$cookiehead .= "\r\n";
		}
		
		// Make up request. Host isn't strictly needed except IIS winges
		if ($this->method == "POST")
		{
			$this->content_length = strlen($strpostvar);
			$this->content_type = "application/x-www-form-urlencoded";
			
			$this->request  = $this->method." ".$this->page." HTTP/".$this->httpversion."\r\n";
			$this->request .= "Host: ".$this->host."\r\n";
			$this->request .= $cookiehead;
			$this->request .= $this->privateMakeRequest();
			$this->request .= $vars."\r\n";
		} else{
			$this->request  = $this->method." ".$this->page.$vars." HTTP/".$this->httpversion."\r\n";
			$this->request .= "Host: ".$this->host."\r\n";
			$this->request .= $cookiehead;
			$this->request .= $this->privateMakeRequest();
			$this->request .= "\r\n";
		}

		// Open socket to URL
		
		$sHnd = fsockopen ($this->host, $this->port, $errno, $errstr, $this->timeout);
		fputs ($sHnd, $this->request);
		
		// Get source
		while (!feof($sHnd))
		{
			$result .= fgets($sHnd,128);
		}
		
		// Strip header
		if ($this->strip_responseheader)
		{
			$result = $this->privateStripResponseHeader($result);
		}
		
		// Strip tags
		if ($this->striptags)
		{
			$result = strip_tags($result);
		}
		// Show the source only
		if ($this->showsource && !$this->striptags)
		{
			$result = htmlentities($result);
			$result = nl2br($result);
		}
		return $result;
	}
	
	// Make up headers
	function privateMakeRequest()
	{
		if (!empty($this->accept))
		{
			$result .= "Accept: ".$this->accept."\r\n";
		}
		if (!empty($this->accept_encoding))
		{
			$result .= "Accept-Encoding: ".$this->accept_encoding."\r\n";
		}
		if (!empty($this->accept_language))
		{
			$result .= "Accept-Language: ".$this->accept_language."\r\n";
		}
		if (!empty($this->authorization))
		{
			$result .= "Authorization: Basic ".base64_encode($this->authorization)."\r\n";
		}
		if (!empty($this->content_length))
		{
			$result .= "Content-length: ".$this->content_length."\r\n";
		}
		if (!empty($this->content_type))
		{
			$result .= "Content-type: ".$this->content_type."\r\n";
		}
		if (!empty($this->date))
		{
			$result .= "Date: ".$this->date."\r\n";
		}
		if (!empty($this->referer))
		{
			$result .= "Referer: ".$this->referer."\r\n";
		}
		if (!empty($this->useragent))
		{
			$result .= "User-Agent: ".$this->useragent."\r\n";
		}
		
		return $result;
	}
	function privateStripResponseHeader($source)
	{
		$headerend = strpos($source,"\r\n\r\n");
		if (is_bool($headerend))
		{
			$result = $source;
		} else{
			$result = substr($source,$headerend+4,strlen($source) - ($headerend+4));
		}
		return $result;
	}

}
?>