nginx URL rewrite using negative regex?

Question

I'm trying to redirect requests to https in nginx, unless it is of the form HOST/ANY_STRING_OF_CHARS/END_OF_URI, e.g.:

http://host.org/about # no redirect

http://host.org/users/sign_in # redirects to https://host.org/users/sign_in

This apparently works in Apache, but I don't understand how the bang works (ignore if it doesn't really work):

RewriteRule !/([a-z]+)$ https://%{SERVER_NAME}%{REQUEST_URI} [L,R]

How can I do this in a nginx rewrite rule? This is not working as I'd hoped:

rewrite !/([a-z]+)$ https://$server_name$request_uri redirect;

This doesn't do the redirect either, in case I had the logic backwards:

rewrite /([a-z]+)$ https://$server_name$request_uri redirect;

Help please?

stackoverflow.com/a/39549548/1642018

user1642018
– user1642018

2017-02-18 07:04:53 +00:00
Commented Feb 18, 2017 at 7:04 — user1642018
– user1642018, Commented Feb 18, 2017 at 7:04

Jack · Accepted Answer · 2013-04-23 11:50:55Z

30

Sends a permanent redirect to the client:

server {
  listen 80;
  rewrite ^(/users/\w+)$ https://$host$1 permanent;
  ...
}

for negative match you could use:

if ($request_uri !~ "^/users/\w+$")
{
  return 301 https://$host$request_uri;
}

edited Apr 23, 2013 at 11:50

answered Apr 23, 2013 at 1:19

Jack

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4 Comments

kbighorse Over a year ago

Thanks for this. I'm looking for a negative match, i.e. no redirect for a specific pattern, redirect for everything else, not just requests with /users/ in it. Good call on permanent, I should be doing that.

Jack Over a year ago

I have added negative match for you.

kbighorse Over a year ago

Thank you! bonus points for a location block instead? I hear that's preferable to if, no?

Jack Over a year ago

You can't do negative match with location.

Sergiy Tytarenko · Accepted Answer · 2017-04-26 15:08:44Z

4

set $test "0";
if ($request_uri ~ "condition") {
   set $test "1";
}
if ($test ~ "0") {
   return 301 redirect url;
}

answered Apr 26, 2017 at 15:08

Sergiy Tytarenko

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