/**
* Gets the start line of a message
*
* @param MessageInterface $message
*
* @return string
* @throws \InvalidArgumentException
*/
public static function getStartLine(MessageInterface $message)
{
if ($message instanceof RequestInterface) {
return trim($message->getMethod() . ' ' . $message->getResource()) . ' HTTP/' . $message->getProtocolVersion();
} elseif ($message instanceof ResponseInterface) {
return 'HTTP/' . $message->getProtocolVersion() . ' ' . $message->getStatusCode() . ' ' . $message->getReasonPhrase();
} else {
throw new \InvalidArgumentException('Unknown message type');
}
}
