rewrite hostname in sub_filter!

[shahzaib mushtaq]

Hi,

I am able to achieve this by writing the following rule which creates a new
variable with domain mydomain-com.

if ($host ~* "(\w+)[-.](\w+)") {
      set $host_new "$1-$2";
    }

However, its not working for any subdomain like work.mydomain.com , i tried
following configs to cover subdomains e.g work-mydomain-com but it didn't
worked:

if ($host ~* "(\w+)[-.](\w+)[-.](\w+)") {
      set $host_new "$1-$2-$3";
    }

======================================================
Any clue where am i wrong?

On Sun, May 12, 2019 at 3:01 PM shahzaib mushtaq <shahzaib.cb at gmail.com>
wrote:

> Hi,
>
> We've running nginx as reverse proxy for backend domain named "
> mydomain.com". On proxy server we've setup vhost that covers domain and
> all subdomains *.mydomain.com.
>
> What we need is that if user request to any subdomain like
> work.mydomain.com, he should be proxied to single backend mydomain.com
> but all underline links e.g css/js should be changed to *work-mydomain-com.newdomain.com
> <http://work-mydomain-com.newdomain.com>* . If second user requests
> nginx.mydomain.com, he should be proxied back to single backend *mydomain.com
> <http://mydomain.com>* while underline links css/js should be changed to *nginx-mydomain-com.newdomain.com
> <http://nginx-mydomain-com.newdomain.com>.*
>
> As you can see we want all dots in domain/subdomain to be changed to
> hyphen (-).
>
> I am able to change css/js links using sub_filter to
> work.mydomain.com.newdomain.com by making use of $host param but i am
> struggling on changing it to hyphens.
>
> Please check this nginx config and advise on how to change hostname from
> dots to hyphen in sub_filter e.g:
>
> mydomain.com ==> mydomain-com.newdomain.com
> work.mydomain.com ==> work-mydomain-com.newdomain.com
> nginx.mydomain.com ==> nginx-mydomain-com.newdomain.com
>
> ====================================================
>
> upstream server {
>         server 10.10.10.10:443;
>
> }
> server {
>     listen      80;
>     listen 443 ssl http2;
>     ssl_certificate /etc/ssl/certs/mydomain/mydomain.crt;
>     ssl_certificate_key /etc/ssl/certs/mydomain/privkey1.pem;
>     ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
>     ssl_ciphers
> 'ECDHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA256:ECDHE-RSA-AES256-SHA:ECDHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA256:DHE-RSA-AES128-SHA256:DHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA:ECDHE-RSA-DES-CBC3-SHA:EDH-RSA-DES-CBC3-SHA:AES256-GCM-SHA384:AES128-GCM-SHA256:AES256-SHA256:AES128-SHA256:AES256-SHA:AES128-SHA:DES-CBC3-SHA:HIGH:!aNULL:!eNULL:!EXPORT:!CAMELLIA:!DES:!MD5:!PSK:!RC4';
>     ssl_prefer_server_ciphers on;
>     server_name mydomain.com *.mydomain.com;
>
>
>
>     location / {
>
>         proxy_set_header Accept-Encoding "";
>         #subs_filter_types text/css text/xml text/css;
>         sub_filter "https://mydomain.com" "https://$host.newdomain.com";
>
>         sub_filter_once off;
>         proxy_pass https://server;
>         proxy_set_header HOST mydomain.com;
>     }
> }
>
>
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