How do I use FastRoute?

Question

I\'m attempting to use the FastRoute routing library and can\'t get the simple usage example to work.

Here is the basic usage example found on the GitHub page:

Answer 1

$r->addRoute(['GET','POST','PUT'], '/test', 'TestClass/testMethod');

Then in your dispatch method:

$routeInfo = $router->dispatch($httpMethod, $uri)
switch($routeInfo[0]) {
 case FastRoute\Dispatcher::FOUND:
 $handler = $routeInfo[1];
 $vars = $routeInfor[2];
 list($class, $method) = explode('/',$handler,2);
 $controller = $container->build()->get($class);
 $controller->{$method}(...array_values($vars));
break;
}   

Class and method of course could be invoked by call_user_func(), but as I wanted the router to be more abstract and placed outside in the root directory I decided to use DI container, which is brilliant.

Answer 2

I made a demo API that uses FastRoute and PHP-DI(dependency injection) to showcase how to use both. See: https://github.com/tochix/shapes-api/blob/master/src/Service/Http/Router.php#L94. In a nutshell, it looks like this:

/**
 * @param string $requestMethod
 * @param string $requestUri
 * @param Dispatcher $dispatcher
 * @throws DependencyException
 * @throws NotFoundException
 */
private function dispatch(string $requestMethod, string $requestUri, Dispatcher $dispatcher)
{
    $routeInfo = $dispatcher->dispatch($requestMethod, $requestUri);

    switch ($routeInfo[0]) {
        case Dispatcher::NOT_FOUND:
            $this->getRequest()->sendNotFoundHeader();
            break;
        case Dispatcher::METHOD_NOT_ALLOWED:
            $this->getRequest()->sendMethodNotAllowedHeader();
            break;
        case Dispatcher::FOUND:
            list($state, $handler, $vars) = $routeInfo;
            list($class, $method) = explode(static::HANDLER_DELIMITER, $handler, 2);

            $controller = $this->getContainer()->get($class);
            $controller->{$method}(...array_values($vars));
            unset($state);
            break;
    }
}

Answer 3

Example how to handle request

$r->addRoute('GET', '/users', 'User/getUsers');

Then if dispatcher found, you can process it like following

case FastRoute\Dispatcher::FOUND:
    $handler = $routeInfo[1];
    $vars = $routeInfo[2];        
    list($class, $method) = explode("/", $handler, 2);
    call_user_func_array(array(new $class, $method), $vars);

    break;

Don't forget to create class User with getUsers() method.