ortc.php

<?php

/*!
 * Realtime Messaging PHP Library
 * Copyright 2016, Realtime
 *
 * Date: Fri Oct 14 2016 v2.1.14
 */

class Request {
    static function execute($method, $url, $data=array(), $referer='', $timeout=30, $user_agent='', $content_type='application/x-www-form-urlencoded'){

        if($content_type=='application/json') {
            $data = json_encode($data);
        } else {
            // Convert the data array into URL Parameters like a=b&foo=bar etc.
            $data = http_build_query($data);
        }
        
        // parse the given URL
        $url = parse_url($url);
        // extract host and path
        $host = $url['host'];
        $path = isset($url['path']) ? $url['path'] : '';
        
        if (trim($host)=="" ){
            return array(
               'errcode' => -2,
               'status' => 'err',
               'error' => "Error: (parse_url) Host is empty"
               );
        }
        
        if($url['scheme'] == 'http'){
            $port = 80;
            $protocol = '';
        }else{
            $port = 443;
            $protocol = 'ssl://';
        }
        // open a socket connection - timeout: 30 sec
        $fp = fsockopen($protocol.$host, $port, $errno, $errstr, $timeout);
        if($fp) {
            // send the request headers:
            fputs($fp, "$method $path HTTP/1.1\r\n");
            fputs($fp, "host: $host\r\n");
            if($referer != '') fputs($fp, "Referer: $referer\r\n");
            if($method == 'POST'){
                fputs($fp, "Content-type: " . $content_type . "\r\n");
                fputs($fp, "Content-length: " . strlen($data) . "\r\n");
            }
            fputs($fp, "Connection: close\r\n\r\n");
            fputs($fp, $data);
            $result = '';
            while(!feof($fp)){
                // receive the results of the request
                $result .= fgets($fp, 128);
            }
        } else {
            return array(
               'errcode' => -3,
               'status' => 'err',
               'error' => "$errstr ($errno)"
               );
        }
        // close the socket connection:
        fclose($fp);
        
        // split the result header from the content
        $result = explode("\r\n\r\n", $result, 2);
        
        $header = isset($result[0]) ? $result[0] : '';
        $content = isset($result[1]) ? $result[1] : '';

        // be carefull with HTTP1.1 (nginx)
        if(preg_match('/Transfer-Encoding: chunked/i', $header)){
            $chunks = explode("\n", $content);
            if (count($chunks)>1){       
                foreach($chunks as $line => $data){
                    if($line%2 == 0) unset($chunks[$line]);

                }
                array_pop($chunks);
                $content = implode("\n", $chunks);
            } else 
            $content = $result[1];
        }
        if( ! preg_match('/^HTTP\/1.1 ([0-9]{3})/', $header, $matches)){
          
           return array(
               'errcode' => -4,
               'status' => 'err',
               'error' => 'Error: failed to localize http 1.1 in the result header',
               'response' => $result
               );
       };
       
       if( !$matches[1] || $matches[1][0] !=='2' ){
        return array(
            'errcode' => -5,
            'status' => 'err',
            'error' => "Error: response was not successful",
            'response' => $result
            );
    }       
    
    // return as structured array:
    return array(
        'errcode' => 0,
        'status' => 'ok',
        'header' => $header,
        'content' => $content
        );
}

}

class Realtime{
    private $ortc_data;
    private $is_version_21;
    
    function __construct($balancer, $app_key, $priv_key, $token){
        
        $arg_list = func_get_args();
        if (count($arg_list)<4) die("ERROR: Some of constructor's parameters are missing.");
        foreach( $arg_list as $idx=>$val )
            if ( trim($val) == "" )
                die("ERROR: parameters '$idx' is not specified.");
            
            $strpos_res = strpos( $balancer, "2.1" );
            $this->is_version_21 = ($strpos_res > 0);
            
            $this->ortc_data['balancer'] = $balancer;
            $this->ortc_data['app_key'] = $app_key;
            $this->ortc_data['priv_key'] = $priv_key;
            $this->ortc_data['token'] = $token;
        }
        
        
        private function _get_server(){
          $url = $this->ortc_data['balancer'].'?appkey='.$this->ortc_data['app_key'];
          $balancer_response = Request::execute("GET",$url);
          if($balancer_response['errcode'] != 0){
             die('Error getting data from balancer! '.$balancer_response['error'].' Response: '.print_r($balancer_response['response'],true));
         }
                // error
         if(!preg_match('/https?:\/\/[^\"]+/', $balancer_response['content'], $matches)){
            return '';
        }
        if('http://undefined:undefined' == $matches[0]) return '';
        
        // success
        return $matches[0];
    }
    
    private function send_message_part($url, $channel, $msg, &$response = Array() ){
      $message = array(
        'AK' => $this->ortc_data['app_key'],
        'PK' => $this->ortc_data['priv_key'],
        'AT' => $this->ortc_data['token'],
        'C' => $channel,
        'M' => $msg
        );
      
      $content = Request::execute("POST",$url. '/send/', $message);
      
      $response = $content;

      return ( $content['errcode'] == 0 );
  }

  public function send($channel, $msg, &$response = Array() ){
    
      $url = $this->_get_server();

        if(!$url || $url == "") return false; // no server available

        $numberOfParts = ((int)(strlen($msg) / 700)) + ((strlen($msg) % 700 == 0)? 0 : 1 );
        $guid = substr(uniqid(),5,8);

        if($numberOfParts > 1){
         $part = 1;
         

         while ($part <= $numberOfParts){

                $ret = $this->send_message_part($url, $channel, $guid."_".$part."-".$numberOfParts."_".substr($msg,($part-1) * 699, 699), $response ); // $response returned used for debug purposes
                if (!$ret)  return false;

                $part = $part + 1;

            }

            return true;
        }
        else
        {
            $ret = $this->send_message_part($url,$channel,$guid."_1-1_".$msg,$response); // returning $response for debug purpose
            return $ret;
        }
    }
    
    
    public function auth($channels, $private = 0, $expire_time = 180000, &$response = Array() ){

        // post permissions
        $fields = array(
            'AK' => $this->ortc_data['app_key'],
            'PK' => $this->ortc_data['priv_key'],
                    'AT' => $this->ortc_data['token'], //access token
                    'PVT' => $private,
                    'TTL' => $expire_time,
                    'TP' => count($channels) // total num of channels
                    );
        
        foreach($channels as $channel => $perms){
            $fields[$channel] = $perms;
        }
        $url = $this->_get_server();
        if(!$url) return false; // no server available
        
        $auth_path = '/authenticate';
        
        $content = Request::execute('POST', $url.$auth_path, $fields, $referer='', 15, 'ortc-php'); // /auth or /authenticate depends on the server version

        $response = $content;
        
        return ( $content['errcode'] == 0 );        
    }


    public function enable_presence($channel, $metadata = 1, &$response = Array() ){

        $fields = array(
            'privatekey' => $this->ortc_data['priv_key'],
            'metadata' => $metadata
        );
        
        $url = $this->_get_server();
        if(!$url) return false; // no server available
        
        $enable_path = '/presence/enable/' . $this->ortc_data['app_key'] . '/' . $channel;        
        $content = Request::execute('POST', $url.$enable_path, $fields, $referer='', 15, 'ortc-php', 'application/json');
        $response = $content;
        
        return ( $content['errcode'] == 0 );        
    }


    public function disable_presence($channel, &$response = Array() ){

        $fields = array(
            'privatekey' => $this->ortc_data['priv_key']
        );
        
        $url = $this->_get_server();
        if(!$url) return false; // no server available
        
        $enable_path = '/presence/disable/' . $this->ortc_data['app_key'] . '/' . $channel;        
        $content = Request::execute('POST', $url.$enable_path, $fields, $referer='', 15, 'ortc-php', 'application/json');
        $response = $content;
        
        return ( $content['errcode'] == 0 );        
    }


    public function get_presence($channel, &$response = Array() ){

        $fields = array(
        );
        
        $url = $this->_get_server();
        if(!$url) return false; // no server available
        
        $get_presence_path = '/presence/' . $this->ortc_data['app_key'] . '/' . $this->ortc_data['token'] . '/' . $channel;        
        $content = Request::execute('GET', $url.$get_presence_path, $fields, $referer='', 15, 'ortc-php');

        if($content['errcode'] == 0){
            $response = $content['content'];
        } else {
            $response = $content['response'][1];
        }
        
        return ( $content['errcode'] == 0 );        
    }
            
}
?>