How to make Nginx redirect without adding a tail string to redirected server

Question

I have an Nginx that redirects to several different web servers based on URL path after host.

My Nginx host is nginx.main.com

current redirect rules are

 # Redirects for Math     
     location ~ ^/(math)($|/) {
     proxy_pass  http://www.aaa.com:8081;
     include /etc/nginx/proxy.conf;
     break;   }

  # Redirects for CS  
     location ~ ^/(cs)($|/) {
     proxy_pass  http://www.aaa.com:8082;
     include /etc/nginx/proxy.conf;
     break;   }

This causes

http://nginx.main.com/math/index.html to be redirected to http://www.aaa.com:8081/math/index.html

And

http://nginx.main.com/cs/index.html to be redirected to http://www.aaa.com:8082/cs/index.html

(My 2 aaa sites sit on IIS on two different ports and 2 different base dirs)

Because of IIS restrictions I dont want the '/math/' and '/cs/' to be added to the destination URL.

e.g., I want

http://nginx.main.com/math/index.htm to be redirected to http://www.aaa.com:8081/index.html

Is this possible with Nginx ?

Answer 1

This should work, if I understand you question correctly

location /math/ {
    proxy_pass  http://www.aaa.com:8081/;
    include /etc/nginx/proxy.conf;
}

location /cs/ {
    proxy_pass  http://www.aaa.com:8082/;
    include /etc/nginx/proxy.conf;
}

I see no reason to use regexp locations, so I changed them to simple. Also break directive does nothing in this config.

I've added trailing slash to proxy_pass so nginx replaces location prefix with this slash and result is http://nginx.main.com/cs/index.html proxied to http://www.aaa.com:8082/index.html.