How do I use FastRoute?

问题

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:

<?php

require '/path/to/vendor/autoload.php';

$dispatcher = FastRoute\simpleDispatcher(function(FastRoute\RouteCollector $r) {
    $r->addRoute('GET', '/users', 'get_all_users_handler');
    // {id} must be a number (\d+)
    $r->addRoute('GET', '/user/{id:\d+}', 'get_user_handler');
    // The /{title} suffix is optional
    $r->addRoute('GET', '/articles/{id:\d+}[/{title}]', 'get_article_handler');
});

// Fetch method and URI from somewhere
$httpMethod = $_SERVER['REQUEST_METHOD'];
$uri = $_SERVER['REQUEST_URI'];

// Strip query string (?foo=bar) and decode URI
if (false !== $pos = strpos($uri, '?')) {
    $uri = substr($uri, 0, $pos);
}
$uri = rawurldecode($uri);

$routeInfo = $dispatcher->dispatch($httpMethod, $uri);
switch ($routeInfo[0]) {
    case FastRoute\Dispatcher::NOT_FOUND:
        // ... 404 Not Found
        break;
    case FastRoute\Dispatcher::METHOD_NOT_ALLOWED:
        $allowedMethods = $routeInfo[1];
        // ... 405 Method Not Allowed
        break;
    case FastRoute\Dispatcher::FOUND:
        $handler = $routeInfo[1];
        $vars = $routeInfo[2];
        // ... call $handler with $vars
        break;
}

Where the comment reads "... call $handler with $vars", I've tried returning call_user_func_array($handler, $vars) but it doesn't work.

I also thought that maybe it was the .htaccess file that was stopping it working, as the Github page doesn't have a .htaccess file example for the project. I'm using this:

RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . index.php [QSA,L]

I've also tried calling a route with a closure as the handler, like so:

$r->addRoute('GET', '/', function() {
    echo 'home';
});

回答1:

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.

回答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;
    }
}

回答3:

$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.

来源：https://stackoverflow.com/questions/38686776/how-do-i-use-fastroute

标签

php

url-routing