php curl proxy

proxy.php

<?php

/**
 * proxy.php
 *
 * Responsible to get data from remote domain
 *
 * mod_rewrite configuration for .htaccess file
 *
 * RewriteEngine on
 * RewriteRule ^$ proxy.php/?$1 [NC,L]
 * RewriteRule ^index.php$ proxy.php/?$1 [NC,L]
 * RewriteCond %{REQUEST_FILENAME} !-d
 * RewriteCond %{REQUEST_FILENAME} !-f
 * RewriteCond %{REQUEST_FILENAME} !-l
 * RewriteRule ^(.*)$ proxy.php/?$1 [NC,L] *
 *
 * @author Eugene Glova
 * @since 2013-08-13
 *
 */

// Local domain
$local_domain = $_SERVER['HTTP_HOST'];

// Original remote host
$remote_domain = 'dev03';

// File to store cookies (must be writable)
$cookie_file = 'cookie.txt';

$headers = apache_request_headers();
$headers['Host'] = $remote_domain;
$user_agent = $headers['User-Agent'];
unset($headers['User-Agent']);

// Get data from remote url
$ch = curl_init('http://' . $remote_domain . $_SERVER['REQUEST_URI']);

curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt($ch, CURLOPT_USERAGENT, $user_agent);
curl_setopt($ch, CURLOPT_COOKIEJAR, $cookie_file);
curl_setopt($ch, CURLOPT_COOKIEFILE, $cookie_file);

// Add support for method POST
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    curl_setopt($ch, CURLOPT_POST, 1);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $_POST);
}

// Get response
$response = curl_exec($ch);

// Get http response code
$http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);

// Get response content type
$content_type = curl_getinfo($ch, CURLINFO_CONTENT_TYPE);

curl_close($ch);

// Replace domain name
$response = str_replace($remote_domain, $local_domain, $response);

// Replace minimized js with development version
$response = str_replace('});
    </script>', '});
    </script>
    <script src="/js/src/require-config.js"></script>
    <script>
        Config.modules.service.connection.types["socket.io"].domain = "node.' . $remote_domain . '";
        require_config.baseUrl = "/js/src/";
        requirejs.config(require_config);
        require(["main"]);
    </script>
', $response);

// Copy cookies
$cookie = file($cookie_file);
$prefix = $remote_domain . "\tFALSE\t/\tFALSE\t";
foreach ($cookie as $key => $value) {
    if (strstr($value, $prefix)) {
        $cookie_string = trim(str_replace($prefix, "", $value));
        $cookie_array = explode("\t", $cookie_string);
        setcookie($cookie_array[1], $cookie_array[2], $cookie_array[0]);
    }
}

// Set response status code
header('HTTP/1.0: ' . $http_code);

// Set response content type
header('Content-type: ' . $content_type);

// Output response
echo $response;