Magento 2: How to define Scope For Router.php

Question

I have created Custom Module. As it requires some front-end routing, have to create Router.php

Whenever I'm accessing Magento eCommece Frontend other pages, say Category/Product Page. It will call my custom module's Router.php

So how can I limit that this Router.php, so it will be called only when I access my Custom Module (App\Code\Custom\Module)

In Addition, Due to this Router.php, my other custom module pages are not working, which is already working fine before.

I'm using this module as a reference for creating my custom module. https://github.com/tzyganu/Magento2SampleModule/tree/master/Controller

Due to this, my module's other pages are not working. Help needed Urgently.

[UPDATE]

Have issue with app\code\Alphanova\ETrade\etc\frontend\routes.xml

<?xml version="1.0"?>
      <config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../../../../../../lib/internal/Magento/Framework/App/etc/routes.xsd">
      <router id="standard">
          <route id="mymodule" frontName="mymodule">
              <module name="Custom_Module" />
           </route>
      </router>
</config>

So other pages are working fine now. But now detail page is not working.

http://localhost/magento2/mymodule => Working

http://localhost/magento2/mymodule/test.html => Not Working.

Previous it's working when i have <route id="custom_module" frontName="custom_module"> in routes.xml

app\code\Custom\Module\etc\frontend\di.xml

  <?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../../../../../../lib/internal/Magento/Framework/ObjectManager/etc/config.xsd">
    <type name="Magento\Framework\App\RouterList">
        <arguments>
            <argument name="routerList" xsi:type="array">
                <item name="Custom_Module" xsi:type="array">
                    <item name="class" xsi:type="string">Custom\Module\Controller\Router</item>
                    <item name="disable" xsi:type="boolean">false</item>
                    <item name="sortOrder" xsi:type="string">22</item>
                </item>
            </argument>
        </arguments>
    </type>
    <virtualType name="CustomModuleRoutingEntityPosts" type="Custom\Module\Model\Routing\Entity">
        <arguments>
            <argument name="prefixConfigPath" xsi:type="const">Custom\Module\Model\Posts\Url::URL_PREFIX_CONFIG_PATH</argument>
            <argument name="suffixConfigPath" xsi:type="const">Custom\Module\Model\Posts\Url::URL_SUFFIX_CONFIG_PATH</argument>
            <argument name="factory" xsi:type="object">Custom\Module\Model\PostsFactory</argument>
            <argument name="controller" xsi:type="string">posts</argument>
        </arguments>
    </virtualType>
    <type name="Custom\Module\Controller\Router">
        <arguments>
            <argument name="routingEntities" xsi:type="array">
                <item name="posts" xsi:type="object">CustomModuleRoutingEntityPosts</item>
            </argument>
        </arguments>
    </type>
</config>

app\code\Custom\Module\Controller\Posts\View.php

  public function execute() {
    echo "1111<pre>";
    exit;
  }

It's not going to controller & gives 404 page error.

[Solved]

It's issue with $request->setModuleName('mymodule'); in Router.php, previously it's $request->setModuleName('custom_module');

Still question is why Product/Catalog routes go to my custom Router.php? How can i set that Router.php file only called for some Module & Controller otherwise not. Because we have configuration in di.xml so that's why it's calling

Answer 1

You only need a custom router.php file if you plan to use custom urls. I mean something else than module/controller/action.
If you don't need urls like mymodule/test.html then you don't need that router.php file and you don't need this in etc/frontend/di.xml

<type name="Magento\Framework\App\RouterList">
    <arguments>
        <argument name="routerList" xsi:type="array">
            <item name="sample_news" xsi:type="array">
                <item name="class" xsi:type="string">Namespace\Module\Controller\Router</item>
                <item name="disable" xsi:type="boolean">false</item>
                <item name="sortOrder" xsi:type="string">10</item>
            </item>
        </argument>
    </arguments>
</type>

If you want url's like mymodule/test.html you need that router file.
And it is normal to have it called when you view the product pages.
Magento accepts a set of router classes. The method match is called from each of these classes until a route is matched to something.