I recently worked on an interesting project for migrating from an old ASP.NET eCommerce site to the latest version of Magento 2 open source (2.1.9).
A common request is, they want to redirect permanently their old product URL to a new one to the new URL under Magento 2 URL structure.
I suppose that they need to redirect product with old URL:
/productdetail.aspx?ID=99 to /this-is-a-migrated-magento-product-url.html
You may think that it is just simply adding custom URL redirection in Magento URL Rewrite management like the picture below
But doing so would bring this URL https://yourdomain.com/productdetail.aspx?ID=99 to a 404 page.
I did a simple trick with .htaccess
RewriteCond %{REQUEST_URI} ^/productdetail\.aspx$
RewriteCond %{QUERY_STRING} ^ID=([0-9]*)$
RewriteRule ^(.*)$ https://yourdomain.com/productdetail/id/%1 [R=301,L]
and then, I will add this custom url to magento backend
After that, when visiting
https://yourdomain.com/productdetail.aspx?ID=99
It will be redirected to
https://yourdomain.com/this-is-a-migrated-magento-product-url.html
I really hope my quick tip will save you guys time for finding a solution to saving the website SEO ranking after migration and avoiding users with annoying 404 errors.
