Redirect URLs with FQDN (dot after TLD) to equivalent with PQDN

Question

Many websites can be accessed with a FQDN (i.e., appending a dot to the TLD):

• https://www.ebay.com./
• https://www.google.com./
• https://www.reddit.com./
• https://stackoverflow.com./
• https://en.wikipedia.org./wiki/Main_Page

Some sites can’t be accessed that way, but I can’t find an example right now.¹ ²

Is it possible, within a .htaccess file, to redirect all variants with the dot suffix to the variants without?

Ideally with a "wildcard" rule, so that you don’t have to list the domains explicitly (for using it on different sites/domains without editing).

Example redirects:

• http://example.com./ →
  http://example.com/
• http://example.com./foo →
  http://example.com/foo
• http://sub.example.com./bar.html →
  http://sub.example.com/bar.html

---

¹ stackoverflow.com, when accessed over HTTP, used to give HTTP error 400: "Bad Request - Invalid Hostname".

² Wikipedia, when accessed over HTTPS (when it was still optional), used to give a certificate error: "The certificate is only valid for the following names: *.wikipedia.org , wikipedia.org (Error code: ssl_error_bad_cert_domain)

Answer 1

This should work :

RewriteCond %{HTTP_HOST} ^([a-z0-9\.-]+)\.com\.$ 
RewriteRule ^(.*) http://www.domain.com/$1  [QSA,L,R=301]