proxy.php

<?PHP


if (!function_exists('getallheaders')) {
	function getallheaders()
	{
		$headers = [];
		foreach ($_SERVER as $name => $value) {
			if (substr($name, 0, 5) == 'HTTP_') {
				$headers[str_replace(' ', '-', ucwords(strtolower(str_replace('_', ' ', substr($name, 5)))))] = $value;
			}
		}
		return $headers;
	}
}



function get_header( $pHeaderKey )
{
	$serverHeaders = getallheaders();

	foreach($serverHeaders as $key => $value) {
		if(strcasecmp($key, $pHeaderKey) === 0) { return $value; }
	}

	return null;
}

// Change these configuration options if needed, see above descriptions for info.
$enable_jsonp    = false;
$enable_native   = true;
$valid_url_regex = '/https:\\/\\/TODO_PUT_INSTALLATION_NAME_HERE\\.veranstaltungsbutler\\.de.*/';

// ############################################################################

$url = $_GET['url'];
$forwardedHeaders = ['Content-Length', 'Content-Type', 'Cache-Control', 'User-Agent', 'Accept-Language', 'Accept'];


$headers = [];
foreach($forwardedHeaders as $forwardedHeader) {
	if(!strlen(get_header($forwardedHeader))) {
		continue;
	}

	$headers[] = $forwardedHeader.': '.get_header($forwardedHeader);
}

if ( !$url ) {

	// Passed url not specified.
	$contents = 'ERROR: url not specified';
	$status = array( 'http_code' => 'ERROR' );

} else if ( !preg_match( $valid_url_regex, $url ) ) {

	// Passed url doesn't match $valid_url_regex.
	$contents = 'ERROR: invalid url';
	$status = array( 'http_code' => 'ERROR' );

} else {
	$ch = curl_init( $url );

	if ( strtolower($_SERVER['REQUEST_METHOD']) == 'post' ) {
		curl_setopt( $ch, CURLOPT_POST, true );
		$entityBody = file_get_contents('php://input');
		curl_setopt( $ch, CURLOPT_POSTFIELDS, $entityBody );
	}

	if ( $_GET['send_cookies'] ) {
		$cookie = array();
		foreach ( $_COOKIE as $key => $value ) {
			$cookie[] = $key . '=' . $value;
		}
		if ( $_GET['send_session'] ) {
			$cookie[] = SID;
		}
		$cookie = implode( '; ', $cookie );

		curl_setopt( $ch, CURLOPT_COOKIE, $cookie );
	}

	curl_setopt( $ch, CURLOPT_FOLLOWLOCATION, true );
	curl_setopt( $ch, CURLOPT_HEADER, true );
	curl_setopt( $ch, CURLOPT_RETURNTRANSFER, true );
	curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);

	curl_setopt( $ch, CURLOPT_USERAGENT, $_GET['user_agent'] ? $_GET['user_agent'] : $_SERVER['HTTP_USER_AGENT'] );

	$response = curl_exec($ch);

// Then, after your curl_exec call:
	$header_size = curl_getinfo($ch, CURLINFO_HEADER_SIZE);
	$header = substr($response, 0, $header_size);
	$body = substr($response, $header_size);

	$status = curl_getinfo( $ch );

	curl_close( $ch );
}

// Split header text into an array.
$header_text = preg_split( '/[\r\n]+/', $header );

// Propagate headers to response.
foreach ( $header_text as $header ) {
	if ( preg_match( '/^(?:Content-Type|Content-Language|Set-Cookie|ETag|Last-Modified):/i', $header ) ) {
		header( $header );
	}
}

print $body;

?>