<?php

/**
 * ERunActionsHttpClient.php
 *
 * A simple Http request client based on
 * http://www.php.net/manual/de/function.fsockopen.php#101872
 *
 * Can send url requests without waiting for response
 * No support for https, proxies ...
 *
 * PHP version 5.2+
 *
 * @author Joe Blocher <yii@myticket.at>
 * @copyright 2011 myticket it-solutions gmbh
 * @license New BSD License
 * @package runactions
 * @version 1.0
 */
class ERunActionsHttpClient
{

  public $userAgent = 'Mozilla/5.0 Firefox/3.6.12';

  private $_touchOnly;

  public function __construct($touchOnly=false)
  {
     $this->_touchOnly = $touchOnly;
  }

  /**
   * Socked based http request
   * Based on code from: http://www.php.net/manual/de/function.fsockopen.php#101872
   * Added touchOnly feature, changed headers
   *
   * @param mixed $ip
   * @param integer $port
   * @param string $uri
   * @param string $verb
   * @param array $getdata
   * @param array $postdata
   * @param array $cookie
   * @param array $custom_headers
   * @param integer $timeout
   * @param mixed $req_hdr
   * @param mixed $res_hdr
   * @return
   */
  public function request
  (
    $ip,                       /* Target IP/Hostname */
    $port = 80,                /* Target TCP port */
    $uri = '/',                /* Target URI */
    $verb = 'GET',             /* HTTP Request Method (GET and POST supported) */
    $getdata = array(),        /* HTTP GET Data ie. array('var1' => 'val1', 'var2' => 'val2') */
    $postdata = null,          /* HTTP POST Data ie. array('var1' => 'val1', 'var2' => 'val2') */
    $contentType = 'text/plain',
    $cookie = array(),         /* HTTP Cookie Data ie. array('var1' => 'val1', 'var2' => 'val2') */
    $custom_headers = array(), /* Custom HTTP headers ie. array('Referer: http://localhost/ */
    $timeout = 2000,           /* Socket timeout in milliseconds */
    $req_hdr = false,          /* Include HTTP request headers */
    $res_hdr = false           /* Include HTTP response headers */
  )
  {
    $ret = '';
    $verb = strtoupper($verb);
    $cookie_str = '';
    $getdata_str = count($getdata) ? '?' : '';
    $postdata_str = '';

    foreach ($getdata as $k => $v)
      $getdata_str .= urlencode($k) .'='. urlencode($v);

    if (isset($postdata))
    {
      if (is_array($postdata))
      {
        foreach ($postdata as $k => $v)
          $postdata_str .= urlencode($k) .'='. urlencode($v) .'&';

        $postdata_str = substr($postdata_str, 0, -1);
      }
      else
        $postdata_str = is_string($postData) ? $postData : serialize($postData);

    }

    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: ' . $this->userAgent . $crlf;
    $req .= "Cache-Control: no-store, no-cache, must-revalidate" . $crlf;
    $req .= "Cache-Control: post-check=0, pre-check=0" . $crlf;
    $req .= "Pragma: no-cache" . $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))
    {
      if (is_array($postdata))
         $req .= 'Content-Type: application/x-www-form-urlencoded' . $crlf;
      else
         $req .= 'Content-Type: '.$contentType . $crlf;

      $req .= 'Content-Length: '. strlen($postdata_str) . $crlf;
      $req .= 'Connection: close' . $crlf . $crlf;
      $req .= $postdata_str;
    }
    else
       $req .= 'Connection: close' . $crlf . $crlf;

    if ($req_hdr)
      $ret .= $req;

    if (($fp = @fsockopen($ip, $port, $errno, $errstr)) == false)
    {
      ERunActions::logError("Error $errno: $errstr");
      return null;
    }

    stream_set_timeout($fp, 0, $timeout * 1000);

    fputs($fp, $req);

    if (!$this->_touchOnly)
    {
      while ($line = fgets($fp)) $ret .= $line;
      fclose($fp);

      if (!$res_hdr)
        $ret = substr($ret, strpos($ret, "\r\n\r\n") + 4);

      return $ret;
    }
    else
    {
      fclose($fp);

      return null;
    }
  }


}
?>