Magento2 adding dynamic route name

Question

In magento1 we used to have an event controller_front_init_routers which could be used to add any route name dynamically based on some logic.

I would like to add a route name which is saved in the database (System Conifguration).

Is there any way we could do something similar in magento2 ?

Answer 1

You can implement your own router and add it to the router cycle in the di configuration.

To add your own router, you have to make the following configuration in the di.xml:

<?xml version="1.0" encoding="UTF-8"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
    <type name="Magento\Framework\App\RouterList">
        <arguments>
            <argument name="routerList" xsi:type="array">
                <item name="routername" xsi:type="array">
                    <item name="class" xsi:type="string">Vendor\Module\Controller\Router</item>
                    <item name="disable" xsi:type="boolean">false</item>
                    <item name="sortOrder" xsi:type="string">60</item>
                </item>
            </argument>
        </arguments>
    </type>
</config>

Your custom Router class has to implement Magento\Framework\App\RouterInterface

from here, its pretty much up to you to decide when your router catches requests and how they are processed.

Here is also a little devdocs entry on routing: http://devdocs.magento.com/guides/v2.0/extension-dev-guide/routing.html

Basically the routers are called in a cycle in the given sort order multiple times. The routers can modify the Request and at any time a router thinks, he can process the request, it says match = true and processes it.

The cyclecount is internally limited to (i think) a hundred cycles or sth. After that you will land on a 404 page.