redirect non www url to www url in Azure app service

Question

I want to redirect non www urls to www url in my application with custom domain added to azure app service, Currently my application is available at both www and non www because I have added 2 custom domains which is example.com and www.example.com. But i wanted to make sure whenever the users visits without www in it, it should be redirected to www.

Answer 1

@Buddiz AI You may want to know that since Traffic Manager only supports custom domain mapping with CNAME records, and because DNS standards don't support CNAME records for mapping root domains (for example, contoso.com), Traffic Manager doesn't support mapping to root domains.

To work around this issue, use a URL redirect from at the app level. In ASP.NET Core, for example, you can use URL Rewriting. Then, use Traffic Manager to load balance the subdomain (www.contoso.com).

To permit the app to redirect non-www requests to www:

• AddRedirectToWwwPermanent: Permanently redirect the request to the www subdomain if the request is non-www. Redirects with a Status308PermanentRedirect status code.
• AddRedirectToWww: Redirect the request to the www subdomain if the incoming request is non-www. Redirects with a Status307TemporaryRedirect status code. An overload permits providing the status code for the response. Use a field of the StatusCodes class for a status code assignment.

Refer to this doc link for details- https://learn.microsoft.com/en-us/aspnet/core/fundamentals/url-rewriting?view=aspnetcore-8.0

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