How to correct htaccess redirect loop error

Question

The following code in my htaccess file is creating a "This webpage has a redirect loop ERR_TOO_MANY_REDIRECTS" error in all browsers I've tested.

RewriteEngine On
RewriteBase /

RewriteCond %{HTTPS} off [OR]
RewriteCond %{HTTP_HOST} !^www.example.com$ [NC]
RewriteRule ^ https://example.com%{REQUEST_URI} [NE,L,R=301]

The code is based on @anubhava's contribution https://stackoverflow.com/a/26914740/1459653

The code seemed to work fine in tests I conducted using http://htaccess.madewithlove.be/

However, once implemented, the error occurred and according to the Redirect Mapping tool at https://varvy.com/tools/redirects/ there are 19 Redirect(s) with a "Final status code: 301" for each of www || www (https) || no www (https)

http://www.example.com
301 redirect
https://example.com/
https://example.com/
301 redirect
https://example.com/
https://example.com/
301 redirect

My intention is to redirect so all permutations (example.com / www.example.com / https://www.example.com / http://example.com) result in being redirected to https://example.com/ (which is how the SSL certificate is issued).

The SSL certificate seems to be in good shape. It scored an "A' in the evaluation by casecurity.ssllabs.com — Mark Gavagan
– Mark Gavagan, Commented Mar 10, 2016 at 2:02

Panama Jack · Accepted Answer · 2016-03-10 02:05:32Z

2

Your code is not correct. What you meant to do is this,

RewriteEngine On
RewriteBase /

RewriteCond %{HTTPS} off [OR]
RewriteCond %{HTTP_HOST} !^example\.com$ [NC]
RewriteRule ^ https://example.com%{REQUEST_URI} [NE,L,R=301]

Specifically you were saying if not www.example.com redirect to example.com, so it redirects to example.com and then it's not www.example.com so it does it again and so on. Hence the redirect loop.

answered Mar 10, 2016 at 2:05

Panama Jack

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1 Comment

Mark Gavagan Over a year ago

Boom! And just like that @Panama Jack fixed the problem AND taught me where I went wrong!

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