Can I get current route information in middleware with Lumen? - php

Question

I need to have the current found controller and action in a middleware, so that I can do some authentication. But I found it impossible, because the pipe is like Middleware1 -> Middleware2-> do the dispatching -> controller#action() -> Middleware2 -> Middleware1.
Therefore before the dispatching, I cannot get the route info. It is definitely not right to do it after the $controller->action().
I did some research and found this.
$allRoutes = $this->app->getRoutes();
$method = \Request::getMethod();
$pathInfo = \Request::getPathInfo();
$currentRoute = $allRoutes[$method.$pathInfo]['action']['uses'];
But this does not work when visiting URI like app/role/1, because $allRoutes only have index of app/role/{id} instead of app/role/1.
Is there any workaround about this?

Answer 1

After do some research, I got solution. Here they go:
Create Custom Dispatcher
First, you have to make your own custom dispatcher, mine is:
App\Dispatcher\GroupCountBased
Stored as:
app/Dispatcher/GroupCountBased.php
Here's the content of GroupCountBased:
<?php namespace App\Dispatcher;
use FastRoute\Dispatcher\GroupCountBased as BaseGroupCountBased;
class GroupCountBased extends BaseGroupCountBased
{
public $current;
protected function dispatchVariableRoute($routeData, $uri) {
foreach ($routeData as $data) {
if (!preg_match($data['regex'], $uri, $matches)) continue;
list($handler, $varNames) = $data['routeMap'][count($matches)];
$vars = [];
$i = 0;
foreach ($varNames as $varName) {
$vars[$varName] = $matches[++$i];
}
// HERE WE SET OUR CURRENT ROUTE INFORMATION
$this->current = [
'handler' => $handler,
'args' => $vars,
];
return [self::FOUND, $handler, $vars];
}
return [self::NOT_FOUND];
}
}
Register Your Custom Dispatcher in Laravel Container
Then, register your own custom dispatcher via singleton() method. Do this after you register all your routes! In my case, I add custom dispatcher in bootstrap/app.php after this line:
require __DIR__.'/../app/Http/routes.php';
This is what it looks like:
/*
|--------------------------------------------------------------------------
| Load The Application Routes
|--------------------------------------------------------------------------
|
| Next we will include the routes file so that they can all be added to
| the application. This will provide all of the URLs the application
| can respond to, as well as the controllers that may handle them.
|
*/
require __DIR__.'/../app/Http/routes.php';
// REGISTER YOUR CUSTOM DISPATCHER IN LARAVEL CONTAINER VIA SINGLETON METHOD
$app->singleton('dispatcher', function () use ($app) {
return FastRoute\simpleDispatcher(function ($r) use ($app) {
foreach ($app->getRoutes() as $route) {
$r->addRoute($route['method'], $route['uri'], $route['action']);
}
}, [
'dispatcher' => 'App\\Dispatcher\\GroupCountBased',
]);
});
// SET YOUR CUSTOM DISPATCHER IN APPLICATION CONTEXT
$app->setDispatcher($app['dispatcher']);
Call In Middleware (UPDATE)
NOTE: I understand it's not elegant, since dispatch called after middleware executed, you must dispatch your dispatcher manually.
In your middleware, inside your handle method, do this:
app('dispatcher')->dispatch($request->getMethod(), $request->getPathInfo());
Example:
public function handle($request, Closure $next)
{
app('dispatcher')->dispatch($request->getMethod(), $request->getPathInfo());
dd(app('dispatcher')->current);
return $next($request);
}
Usage
To get your current route:
app('dispatcher')->current;

Answer 2

I found the correct answer to this problem. I missed one method named routeMiddleware() of Application. This method registers the route-specific middleware which is invoked after dispatching. So Just use $app->routeMiddleware() to register you middleware. And get the matched route info by $request->route() in your middleware.

Answer 3

$methodName = $request->getMethod();
$pathInfo = $request->getPathInfo();
$route = app()->router->getRoutes()[$methodName . $pathInfo]['action']['uses'];
$classNameAndAction = class_basename($route);
$className = explode('#', $classNameAndAction)[0];