Not able to see URL without trailing slash in NGINX - nginx

Question

I know that this is a common issue in NGINX and there are many threads about that.
Issue:
When accessing the URL http://localhost/var without trailing slash is working with my current config. However, I need to add 2 locations (one with trailing slash and second one without trailing slash).
If i try accessing the URL with trailing slash, it is being redirected correctly and page is displayed correctly.
The issue comes when i try accessing the second URL:
http://localhost/var/api/app/v2
I did the same, adding two locations (one with trailing slash and second one without trailing slash). However, looks like the rewrite that i included inside server block is making a conflict as the url has some stuff behind "var". I am getting an 404 error.
This is my current config file:
server {
listen 8080;
listen [::]:8080;
server_name localhost;
rewrite ^/(.*)/$ /$1 permanent;
absolute_redirect off;
access_log /var/log/nginx/access.log main;
##location 1##
location /##var##/ {
set $dash local.##var##.svc;
rewrite ^/##var##(.*)$ $1 break;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_pass http://$dash:8080;
auth_basic_user_file /etc/apache2/dash_auth;
}
location /##var## {
set $dash local.##var##.svc;
rewrite ^/##var##/(.*)$ $1 break;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_pass http://$dash:8080/;
auth_basic_user_file /etc/apache2/dash_auth;
}
##location 2##
location /##var##/api/app/v2/ {
set $nu local2.##var##.svc;
rewrite ^/##var##/api/v2/app/(.*)$ /app/$1 break;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_pass http://$nu:6000;
auth_basic_user_file /etc/apache2/dash_auth;
}
location /##var##/api/app/v2 {
set $nu local2.##var##.svc;
rewrite ^/##var##/api/app/v2(.*)$ /app/$1 break;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_pass http://$nu:6000/;
auth_basic_user_file /etc/apache2/dash_auth;
}
}
This is working when accessing the URL:
http://localhost/var
but not when accessing the URL:
http://localhost/var/api/app/v2
i think the conflict is regarding the rewrite in the server but not sure how can i fix that.
I tried to add the rewrite inside the location for /var/ but not working as expected. I was thinking about include a specifyc rewrite for every location but not sure if this is gonna work.
Also I trid to add these two rewite rules in server block, but not working:
rewrite ^/api/app/(.*)/$ /api/app/$1 permanent;
rewrite ^/(.*)/$ /$1 permanent;
Regarding the ports, that is something currently working. i mean without including any modification in the nginx config it is working (just with URL with trailing slash although).

Answer 1

Change
proxy_pass http://$dash:8080;
To
proxy_pass http://$dash:8080/;
Also your default nginx location should looke like this
location / {
auth_basic_user_file /etc/apache2/dash_auth;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_pass http://$dash:8080/;
}