<?php
class Http{
private static $cache = false;
public static function Request($url){
$url_parts = parse_url($url);
$url_parts["port"] = isset($url_parts["port"]) ? $url_parts["port"] : 80;
$url_parts["path"] = isset($url_parts["path"]) ? $url_parts["path"] : "/";
return self::FullRequest("GET", $url_parts["host"], $url_parts["port"], $url_parts["path"]);
}
public static function FullRequest(
$verb = 'GET', /* HTTP Request Method (GET and POST supported) */
$ip, /* Target IP/Hostname */
$port = 80, /* Target TCP port */
$uri = '/', /* Target URI */
$getdata = array(), /* HTTP GET Data ie. array('var1' => 'val1', 'var2' => 'val2') */
$postdata = array(), /* HTTP POST Data ie. array('var1' => 'val1', 'var2' => 'val2') */
$cookie = array(), /* HTTP Cookie Data ie. array('var1' => 'val1', 'var2' => 'val2') */
$custom_headers = array(), /* Custom HTTP headers ie. array('Referer: http://localhost/ */
$timeout = 1000, /* Socket timeout in milliseconds */
$req_hdr = false, /* Include HTTP request headers */
$res_hdr = false, /* Include HTTP response headers */
$depth = 4 /* Depth of the iteration left (to avoid redirection loops) */
)
{
if(self::$cache){
$cacheFile = "cache/".$ip."/".str_replace("/", "...", $uri);
if(is_file($cacheFile)){
$data = file_get_contents($cacheFile);
return self::resolveTruncated($data);
}
}
$ret = '';
$verb = strtoupper($verb);
$cookie_str = '';
$getdata_str = count($getdata) ? '?' : '';
$postdata_str = '';
foreach ($getdata as $k => $v)
$getdata_str .= urlencode($k) .'='. urlencode($v);
foreach ($postdata as $k => $v)
$postdata_str .= urlencode($k) .'='. urlencode($v) .'&';
foreach ($cookie as $k => $v)
$cookie_str .= urlencode($k) .'='. urlencode($v) .'; ';
$crlf = "\r\n";
$req = $verb .' '. $uri . $getdata_str .' HTTP/1.1' . $crlf;
$req .= 'Host: '. $ip . $crlf;
$req .= 'User-Agent: Mozilla/5.0 Firefox/3.6.12' . $crlf;
$req .= 'Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8' . $crlf;
$req .= 'Accept-Language: en-us,en;q=0.5' . $crlf;
$req .= 'Accept-Encoding: deflate' . $crlf;
$req .= 'Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7' . $crlf;
foreach ($custom_headers as $k => $v)
$req .= $k .': '. $v . $crlf;
if (!empty($cookie_str))
$req .= 'Cookie: '. substr($cookie_str, 0, -2) . $crlf;
if ($verb == 'POST' && !empty($postdata_str))
{
$postdata_str = substr($postdata_str, 0, -1);
$req .= 'Content-Type: application/x-www-form-urlencoded' . $crlf;
$req .= 'Content-Length: '. strlen($postdata_str) . $crlf . $crlf;
$req .= $postdata_str;
}
else $req .= $crlf;
if ($req_hdr)
$ret .= $req;
if (($fp = @fsockopen($ip, $port, $errno, $errstr)) == false)
return "Error $errno: $errstr\n";
stream_set_timeout($fp, 0, $timeout * 1000);
fputs($fp, $req);
$ret .= stream_get_contents($fp);
fclose($fp);
$headerSplit = strpos($ret, "\r\n\r\n");
$header = substr($ret, 0, $headerSplit);
$redirectURL = self::CheckForRedirect($header);
if($redirectURL !== false){
if($depth > 0){
$url_parts = parse_url($redirectURL);
$url_parts["port"] = isset($url_parts["port"]) ? $url_parts["port"] : 80;
$url_parts["path"] = isset($url_parts["path"]) ? $url_parts["path"] : "/";
return self::FullRequest($verb, $url_parts["host"], $url_parts["port"], $url_parts["path"], $getdata, $postdata, $cookie, $custom_headers, $timeout, $req_hdr, $res_hdr, $depth-1);
}else{
return "Redirect loop, stopping...";
}
}
$truncated = false;
$headerLines = explode("\r\n", $header);
foreach($headerLines as $line){
list($name, $value) = explode(":", $line);
$name = trim($name);
$value = trim($value);
if(strtolower($name) == "transfer-encoding" && strtolower($value) == "chunked"){ //TODO: Put right values!
$truncated = true;
}
}
if (!$res_hdr)
$ret = substr($ret, $headerSplit + 4);
if($truncated){
$ret = self::resolveTruncated($ret);
}
if(self::$cache){
if(!is_dir("cache")){
mkdir("cache");
}
if(!is_dir("cache/".$ip)){
mkdir("cache/".$ip);
}
if(!is_file("cache/".$ip."/".str_replace("/", "...", $uri))){
$h = fopen("cache/".$ip."/".str_replace("/", "...", $uri), "w");
fwrite($h, $ret);
fclose($h);
}
}
return $ret;
}
private static function resolveTruncated($data){
$pos = 0;
$end = strlen($data);
$out = "";
while($pos < $end){
$endVal = strpos($data, "\r\n", $pos);
$value = hexdec(substr($data, $pos, $endVal-$pos));
$out .= substr($data, $endVal+2, $value);
$pos = $endVal+2+$value;
}
return $out;
}
private static function CheckForRedirect($header){
$firstLine = substr($header, 0, strpos($header, "\r\n"));
list($httpVersion, $statusCode, $message) = explode(" ", $firstLine);
if(substr($statusCode, 0, 1) == "3"){
$part = substr($header, strpos(strtolower($header), "location: ")+strlen("location: "));
$location = trim(substr($part, 0, strpos($part, "\r\n")));
if(strlen($location) > 0){
return $location;
}
}
return false;
}
}
?>
