Proxy Script to allow Sugar to Receive MailChimp Webhooks using SugarChimp

proxy.php

<?php

/**
If you want to keep your SugarCRM server non-accessible from the outside web
But you still want to receive MailChimp updates with SugarChimp, this script will help you do so
You need to make this script accessible from the outside web and it will allow MailChimp to connect to Sugar through the SuagrChimpWebhook entrypoint
All other Sugar requests will get ignored

Be sure to change the $sugar_url variable to the path of your index.php script inside your Sugar folder
*/

// CHANGE THIS LINE BELOW TO YOUR SUGAR INSTANCE URL
$sugar_url = "http://url-to-my-sugar-instance.com/index.php";

if ($_REQUEST['module'] == 'SugarChimp')
{
    $ch = curl_init();
    
    if ($_REQUEST['entryPoint'] == 'SugarChimpWebhook')
    {
        curl_setopt($ch, CURLOPT_URL, $sugar_url . "?module=SugarChimp&entryPoint=SugarChimpWebhook");
        $post_data_array = array(
            'type' => $_REQUEST['type'],
            'data' => $_REQUEST['data'],
        );
        $post_data_string = http_build_query($post_data_array);
        curl_setopt($ch,CURLOPT_POST, 1);
        curl_setopt($ch,CURLOPT_POSTFIELDS, $post_data_string);
    }
    else if ($_REQUEST['entryPoint'] == 'OAuthTokenCapture')
    {
        $args = array(
            'state' => $_REQUEST['state'],
            'token' => $_REQUEST['token'],
            'module' => 'SugarChimp',
            'entryPoint' => 'OAuthTokenCapture',
        );
        $query = http_build_query($args);
        curl_setopt($ch, CURLOPT_URL, $sugar_url . "?" . $query);
    }
    
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER,false);
    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST,false);
    curl_exec($ch);
    curl_close($ch);
    unset($ch);
}