Create optionale route parameters

Ralf_Eggert · February 18, 2018, 11:48am

Hi,

how can I define optional route parameters with the Zend Expressive Router. Given is a route like this:

/order/index/index/webspace/770/cpu/4/ram/32/hdd/250

With “webspace”, “cpu” and so on as optional parameters. They can be set but must not. For migrating a ZF1 application to Zend\Expressive the route structure should not be changed.

Any suggestions?

Thanks,

Ralf

ocramius · February 18, 2018, 1:20pm

Probably needs a custom routing middleware here, and let the existing
router in expressive just match the first bit of the URI.

Ralf_Eggert · February 18, 2018, 2:49pm

Thanks,

But how can I let the existing router just match the first bit? Is there a way to stop the matching at a special point? Do you have any example.

To be precise: in the project the Zend Router is used with Zend\Expressive.

Thanks, Ralf

ocramius · February 19, 2018, 7:50am

Hey Ralf,

This really depends on the router implementation. I’m looking at
https://github.com/nikic/FastRoute and it should be possible to have a
regex that matches everything after a certain point in the URI.

Marco Pivetta

http://twitter.com/Ocramius

http://ocramius.github.com/

Ralf_Eggert · February 19, 2018, 8:21am

Hi Marco,

but I am afraid Zend\Expressive\Router\ZendRouter does not support regex, does it? Haven’t seen any example in the wilds yet.

I need to check, if the switch to FastRoute is an option.

Thanks, Ralf

ocramius · February 19, 2018, 8:44am

I only see a RouteCollector being used:

github.com

zendframework/zend-expressive-fastroute/blob/d3b6cc329f44d1785a0ae465daed0f2f8291f024/src/FastRouteRouter.php#L142


 *   RouteGenerator.
 * - A callable that returns a GroupCountBased dispatcher will be created.
 *
 * @param null|RouteCollector $router If not provided, a default
 *     implementation will be used.
 * @param null|callable $dispatcherFactory Callable that will return a
 *     FastRoute dispatcher.
 * @param array $config Array of custom configuration options.
 */
public function __construct(
    RouteCollector $router = null,
    callable $dispatcherFactory = null,
    array $config = null
) {
    if (null === $router) {
        $router = $this->createRouter();
    }


    $this->router             = $router;
    $this->dispatcherCallback = $dispatcherFactory;

Marco Pivetta

http://twitter.com/Ocramius

http://ocramius.github.com/

Ralf_Eggert · February 19, 2018, 9:31am

Ok, just noticed that the ZendRouter is using a TreeRouteStack.

github.com

zendframework/zend-expressive-zendrouter/blob/master/src/ZendRouter.php#L78


 */
private $zendRouter;


/**
 * Constructor.
 *
 * Lazy instantiates a TreeRouteStack if none is provided.
 *
 * @param null|TreeRouteStack $router
 */
public function __construct(TreeRouteStack $router = null)
{
    if (null === $router) {
        $router = $this->createRouter();
    }


    $this->zendRouter = $router;
}


/**
 * {@inheritDoc}

I need to look into that a little deeper.

Thanks, Ralf

xtreamwayz · February 21, 2018, 9:21am

Have a look at this part:

github.com

zendframework/zend-expressive-zendrouter/blob/5902a60f1a7881f71d4bc83dfa2c5839e7fb3eec/src/ZendRouter.php#L304-L312


$spec = [
    'type'          => 'segment',
    'options'       => $options,
    'may_terminate' => false,
    'child_routes'  => [
        $httpMethodRouteName           => $httpMethodRoute,
        self::METHOD_NOT_ALLOWED_ROUTE => $methodNotAllowedRoute,
    ]
];

It creates a segment route type. There is no support yet for regex routes. There is an open issue for regex support or use another router like FastRoute. However, with FastRoute I think an optional parameter can only be followed by other optional parameters in a specific order.

So a regex could match
/order/index/index
/order/index/index/webspace/770
/order/index/index/webspace/770/cpu/4
/order/index/index/webspace/770/cpu/4/ram/32
/order/index/index/webspace/770/cpu/4/ram/32/hdd/250

But you can’t have a regex for:
/order/index/index/webspace/770
/order/index/index/cpu/4/ram/32/hdd/250
/order/index/index/cpu/4/hdd/250

It’s a while since I tried this so I’m not 100% sure.

xtreamwayz · March 8, 2018, 7:43am

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Create optionale route parameters

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