How to send data between two server using CURL in Codeigniter? - php

Question

I have two Servers:
1. Licensing
2. Provisioning
Now a client(android/ios device) sends a request to license server. So there we get some parameters from GET which I forward to Provisioning server, using CURL like this:
$skey = $this->input->get('site_id');
$uid = $this->input->get('user_id');
$url = "http://127.0.0.1/example.com?site_key=".$skey."&uid=".$uid;
$wget_cmd = "wget --no-check-certificate \"".$url."\" >/dev/null 2>/dev/null ";
//echo($wget_cmd);
//exec($wget_cmd);
// create a new cURL resource
$ch = curl_init();
//curl_setopt($ch, CURLOPT_AUTOREFERER, TRUE);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt($ch, CURLOPT_VERBOSE, TRUE);
curl_setopt($ch, CURLOPT_HTTPGET, TRUE);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, TRUE);
curl_setopt($ch, CURLOPT_TIMEOUT, 300);
// set URL and other appropriate options
curl_setopt($ch, CURLOPT_URL, $url);
//curl_setopt($ch, CURLOPT_HEADER, 0);
// grab URL and pass it to the browser
curl_exec($ch);
echo curl_error($ch);
// close cURL resource, and free up system resources
curl_close($ch);
Now the provisioning server has a file called provisioning.php. There I perform some DB operations based on the request from License server and generate a URL which I want to send back to the license server.
On provisioning I generate a URL like this based on DB operations:
$uri = site_url('/uploads/'.$user_ini['custom_ini_filename'].'.ini');
$ini_url = json_encode($uri,JSON_UNESCAPED_SLASHES);
Here I want to return this $ini_url back to license server.
How do I do this?
How to access this $ini_url on the license server ?

Answer 1

Set CURLOPT_RETURNTRANSFER to 1 and simply assign the response from curl_exec($ch) to a variable:
License Server
$skey = $this->input->get('site_id');
$uid = $this->input->get('user_id');
$url = "http://127.0.0.1/example.com?site_key=".$skey."&uid=".$uid;
$wget_cmd = "wget --no-check-certificate \"".$url."\" >/dev/null 2>/dev/null ";
$ch = curl_init();
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt($ch, CURLOPT_VERBOSE, TRUE);
curl_setopt($ch, CURLOPT_HTTPGET, TRUE);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, TRUE);
curl_setopt($ch, CURLOPT_TIMEOUT, 300);
curl_setopt($ch, CURLOPT_URL, $url);
// The blow variable stores the response from provision server
$response_from_provision_server = curl_exec($ch);
echo curl_error($ch);
curl_close($ch);
You will also need to echo the contents of $ini_url from the provision server, this being the output that is sent back to License Server in response to the curl_exec() call.
Provisioning Server
$uri = site_url('/uploads/'.$user_ini['custom_ini_filename'].'.ini');
$ini_url = json_encode($uri,JSON_UNESCAPED_SLASHES);
// echo the $ini_url variable
echo $ini_url;