Zend framework 2 routing required query parameters not working - php

Question

I'm working on zf2 to make one of my routes only accessible when a query string parameter is passed. Otherwise, it will not. I've added a filter on the route section but when accessing the page without the query parameter, it is still going thru.
'router' => array(
'routes' => array(
'show_post' => array(
'type' => 'segment',
'options' => array(
'route' => '[/]show/post/:filter',
'constraints' => array(
'filter' => '[a-zA-Z0-9-.]*',
),
'defaults' => array(
'controller' => 'blog_controller',
'action' => 'show'
)
),
),
),
),
http://example.com/show/post/?postId=1235 = This should work
http://example.com/show/post?postId=1235 = This should work
http://example.com/show/post/ = This should not work
http://example.com/show/post = This should not work

Answer 1

The way you currently have this setup you would have to structure your url like this
http://example.com/show/post/anything?postId=1235
I think what you are wanting is to structure your route like this
'route' => '[/]show/post',
Not sure what you are trying to accomplish with [/] before show though, you are making that dash optional there?
I would write it like this
'route' => '/show/post[/:filter]',
This way you can structure your urls like this
http://example.com/show/post/anything?postId=1235
or
http://example.com/show/post?postId=1235
Then in your action you can access those parameters like this
$filter = $this->params('filter');
$post_id = $this->params()->fromQuery('post_id');
or just
$post_id = $this->params()->fromQuery('post_id');
***************UPDATE***************
It looks like zf2 used to include what you are trying to do and removed it because of security reasons.
http://framework.zend.com/security/advisory/ZF2013-01

Answer 2

Don't try to bend ZF2 standard classes to your way. Instead write your own route class, a decorator to the segment route, which will do exactly as you please:
<?php
namespace YourApp\Mvc\Router\Http;
use Zend\Mvc\Router\Http\Segment;
use use Zend\Mvc\Router\Exception;
use Zend\Stdlib\RequestInterface as Request;
class QueryStringRequired extends Segment
{
public static function factory($options = [])
{
if (!empty($options['string'])) {
throw new Exception\InvalidArgumentException('string parameter missing');
}
$object = parent::factory($options);
$this->options['string'] = $options['string'];
return $object;
}
public function match(Request $request, $pathOffset = null, array $options = [])
{
$match = parent::match($request, $pathOffset, $options);
if (null === $match) {
// no match, bail early
return null;
}
$uri = $request->getUri();
$path = $uri->getPath();
if (strpos($path, $this->options['string']) === null) {
// query string parametr not found in the url
// no match
return null;
}
// no query strings parameters found
// return the match
return $match;
}
}
This solution is very easy to unit test as well, it does not validate any OOP principles and is reusable.
Your new route definition would look like this now:
// route definition
'router' => array(
'routes' => array(
'show_post' => array(
'type' => YourApp\Mvc\Router\Http\QueryStringRequired::class,
'options' => array(
'string' => '?postId=',
'route' => '[/]show/post/:filter',
'constraints' => array(
'filter' => '[a-zA-Z0-9-.]*',
),
'defaults' => array(
'controller' => 'blog_controller',
'action' => 'show'
)
),
),
),
),