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<?php
// HTTPRequest class adapted from http://sg.php.net/manual/en/function.fopen.php#58099
//#usage:
//$r = new HTTPRequest('http://www.php.net');
//echo $r->DownloadToString();
class dtc_HTTPRequest
{
var $_fp; // HTTP socket
var $_url; // full URL
var $_host; // HTTP host
var $_protocol; // protocol (HTTP/HTTPS)
var $_uri; // request URI
var $_port; // port
// Timeout in seconds
var $_timeout = 5;
// scan url
function _scan_url()
{
$req = $this->_url;
$pos = strpos($req, '://');
$this->_protocol = strtolower(substr($req, 0, $pos));
$req = substr($req, $pos+3);
$pos = strpos($req, '/');
if($pos === false)
$pos = strlen($req);
$host = substr($req, 0, $pos);
if(strpos($host, ':') !== false)
{
list($this->_host, $this->_port) = explode(':', $host);
}
else
{
$this->_host = $host;
$this->_port = ($this->_protocol == 'https') ? 443 : 80;
}
$this->_uri = substr($req, $pos);
if($this->_uri == '')
$this->_uri = '/';
}
// constructor
function dtc_HTTPRequest($url)
{
$this->_url = $url;
$this->_scan_url();
}
// download URL to string Array
function DownloadToStringArray()
{
$crlf = "/[\r\n]+/";
$fullresponse = $this->DownloadToString();
$array = preg_split($crlf, $fullresponse, -1, PREG_SPLIT_NO_EMPTY);
return $array;
}
// download URL to string
function DownloadToString()
{
// store errors in case we need to handle them
$errno;
$errstr;
$response ='';
$crlf = "\r\n";
// generate request
$req = 'GET ' . $this->_uri . ' HTTP/1.0' . $crlf
. 'Host: ' . $this->_host . $crlf
. $crlf;
// fetch from URL
$this->_fp = fsockopen(($this->_protocol == 'https' ? 'ssl://' : '') . $this->_host, $this->_port, $errno, $errstr, $this->_timeout);
fwrite($this->_fp, $req);
$a_vers = explode(".",phpversion());
$use_stream = TRUE;
if($a_vers[0] <= 4 && $a_vers[1] < 3)
{
// first < 4.3, then we need to use socket rather than stream
$use_stream = FALSE;
}
if ($use_stream)
{
stream_set_blocking($this->_fp, TRUE);
stream_set_timeout($this->_fp,$this->_timeout);
}
else
{
socket_set_blocking($this->_fp, TRUE);
socket_set_timeout($this->_fp,$this->_timeout);
}
// get the socket status
$info;
if ($use_stream)
{
$info = stream_get_meta_data($this->_fp);
} else {
$info = socket_get_status($this->_fp);
}
while(is_resource($this->_fp) && $this->_fp && !feof($this->_fp) && (!$info['timed_out']))
{
$response .= fread($this->_fp, 4096);
if ($use_stream)
{
$info = stream_get_meta_data($this->_fp);
} else {
$info = socket_get_status($this->_fp);
}
@ob_flush();
flush();
}
fclose($this->_fp);
// split header and body
$pos = strpos($response, $crlf . $crlf);
if($pos === false)
return($response);
$header = substr($response, 0, $pos);
$body = substr($response, $pos + 2 * strlen($crlf));
// parse headers
$headers = array();
$lines = explode($crlf, $header);
foreach($lines as $line)
if(($pos = strpos($line, ':')) !== false)
$headers[strtolower(trim(substr($line, 0, $pos)))] = trim(substr($line, $pos+1));
// redirection?
if(isset($headers['location']))
{
$http = new dtc_HTTPRequest($headers['location']);
return($http->DownloadToString($http));
}
else
{
return($body);
}
}
}
?>
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