<?php header("Cache-Control: no-cache");

//
//Refer to comments to make necessary changes to configure this index.php
//

//
//NECESSARY CHANGE REQUIRED
//Domain name used to access web server hosting this index.php file
$mydomain = "yourdomainname"; //e.g. "xyz.com"
//

//
//encryption configuration. Change this so that data transfers through
//internet message bus is encrypted with your own keys
//
//16 characters long iv, replace with your own.
//This should exactly match the value used by java client: IMBClientMain 
$iv = "0123456789123456"; 
//
//encryption key, replace with your own
//This should exactly match the value used by java client: IMBClientMain 
$secretKey = "ReplaceThisByYouSecretKey"; 
//

//
//IMB request queue suffix. This will be added to the queue name. This could
//be helpful in cases wherein you want to use multiple setup like multiple
//dev/test/production environment.
$queuesuffix = ""; //e.g. v1.0
//

//------------------------------------------------------------------//
//No more changes required after this. Make changes only if you want
//to have any specific requirement(s). For e.g. if you want to add
//additional headers, modify $request_headers
//------------------------------------------------------------------//

//The url you wish to send the POST request to
$url = 'http://internetservicebus.com/';


//content type
$RequestContentType  = "text";

$method = $_SERVER['REQUEST_METHOD'];

$contenttype = '';

if(strpos($_SERVER['REQUEST_URI'],'css') !== false){
    $contenttype = 'text/css';

}
else if((strpos($_SERVER['REQUEST_URI'],'jpg') !== false)
        ||
        (strpos($_SERVER['REQUEST_URI'],'jpeg') !== false)
        ||
        (strpos($_SERVER['REQUEST_URI'],'png') !== false)
        ||
        (strpos($_SERVER['REQUEST_URI'],'bmp') !== false)
        ||
        (strpos($_SERVER['REQUEST_URI'],'ico') !== false)
        ||
        (strpos($_SERVER['REQUEST_URI'],'pdf') !== false)
        ) {
    $contenttype = 'image/png';
    $RequestContentType = "img";

 }
else {
        $contenttype = 'text/html';

 }

//Add additional request headers needed
$request_headers = array(
                    "queuesuffix:".$queuesuffix, //--Modify, if required to create seperate multiple instances
                    "Domainname:".$mydomain, //---Modify, set your domain name
                    "RequestedURI:".$_SERVER['REQUEST_URI'],
                    "Content-type:".$contenttype
                    //---more 'name:value' can be added, all of them
                    //will be available to web application as headers
                );

foreach (apache_request_headers() as $name => $value) {
  $request_headers[] = "$name:$value";
}

 
switch ($method) {
  case 'GET':
    //open connection
    $ch = curl_init();

    //set the url, number of GET vars, GET data
    curl_setopt($ch,CURLOPT_URL, $url .=$_SERVER['REQUEST_URI']);
    curl_setopt($ch,CURLOPT_GET, true);
    curl_setopt($ch, CURLOPT_HTTPHEADER, $request_headers);

    //So that curl_exec returns the contents of the cURL; rather than echoing it
    curl_setopt($ch,CURLOPT_RETURNTRANSFER, true); 

    //execute get
    $result = "";
    //$result = curl_exec($ch);
    header('Content-Type: '. $contenttype);
    if(strpos($RequestContentType,'img') !== false){
        //image encrypt/decrypt not supported
        $result = curl_exec($ch);
        echo $result;
    }
    else {


        //execute get
        $result = curl_exec($ch);
        echo @decrypt($result, $iv, $secretKey);

    }

    break;

  case 'POST':

    //open connection
    $ch = curl_init();

    //set the url, number of POST vars, POST data
    curl_setopt($ch,CURLOPT_URL, $url .=$_SERVER['REQUEST_URI']);
    curl_setopt($ch,CURLOPT_POST, true);
    curl_setopt($ch, CURLOPT_HTTPHEADER, $request_headers);
    $json = file_get_contents('php://input');

    $jsonenc = @encrypt($json, $iv, $secretKey);

    curl_setopt($ch,CURLOPT_POSTFIELDS, $jsonenc);

    //So that curl_exec returns the contents of the cURL; rather than echoing it
    curl_setopt($ch,CURLOPT_RETURNTRANSFER, true); 

    //execute post
    $result = curl_exec($ch);
    header('Content-Type: '. $contenttype);

    if(strpos($RequestContentType,'img') !== false){
        //image encrypt/decrypt not supported
        echo $result;
    }
    else {
        echo @decrypt($result, $iv, $secretKey);

    }
    
    break;

  default:
    //do nothing
    break;
}

//
//Thanks @Stéphane Moreau
//
//final String iv = "0123456789123456"; // This has to be 16 characters
//final String secretKey = "Replace this by your secret key";
//
function encrypt($message, $initialVector, $secretKey) {
    return base64_encode(
        mcrypt_encrypt(
            MCRYPT_RIJNDAEL_128,
            md5($secretKey),
            $message, 
            MCRYPT_MODE_CFB,
            $initialVector
        )
    );
}

 function decrypt($message, $initialVector, $secretKey) {
    return 
      mcrypt_decrypt(
            MCRYPT_RIJNDAEL_128,
            md5($secretKey),
            base64_decode($message), 
            MCRYPT_MODE_CFB,
            $initialVector
      );
}

?>