nginx regex with capture bug

Question

I'm trying to use regex capture functions for create an Access-Control-Origin header.

So y have two main capture, one for the adress of website ( likehttp://example.com) and another for the port user (such as :4200).

The idea is having this header : Origin: http://example.com:4200

My capture work for the first case but it seem to don't like the port.

I get Origin : http://example.com: instead of Origin: http://example.com:4200

Here is my nginx config :

My guess is that Access-Control-Allow-Origin don't understant numerical value.

    if ($request_uri ~ ^/api/blabla/*){
          set $public "1";
    }

    if ($http_origin ~* (https?:\/\/[^/]*(localhost|\.example.com))(:[0-9]+)?[^\w\d]) {
         set $public "${public}1";
    } 
    if ($public = "11"){
         set $http_origin_regex $1$4;
         add_header 'Access-Control-Allow-Origin' "$http_origin_regex";
    }

you have `()(` in `(https?:\/\/[^/]*()(localhost`. it looks wrong — Tamar, Jun 23 '17 at 09:49
`$http_origin ~* ^https?://[^/]*(localhost:|\.example\.com)(:[0-9]+)$` — Tamar, Jun 23 '17 at 10:02
There are many online tools for checking your regular expressions and how their captures work. They are really useful in debugging. — Tero Kilkanen, Jun 23 '17 at 11:39
I've already check this part. the capture is totally working these website but not in nginx — P0pR0cK5, Jun 23 '17 at 12:40

score 0 · Answer 1 · answered Jun 23 '17 at 10:09

look at http://marcel.zurreck.com/enable-cross-origin-requests-cors-nginx/

using their syntax I got:

location ~ ^/api/blabla/ {
    if ($http_origin ~* (https?://[^/]*(localhost|\.example\.com)(:[0-9]+)?)) {
        add_header 'Access-Control-Allow-Origin' "$http_origin";
    }
}

nginx regex with capture bug

1 Answers1