how to remove trailing slash on post request nginx

Question

I'm trying to remove trailing slash on http post method, when i try to re-write the URL using rewrite ^/(.*)/$ /$1 permanent; it doesn't work for me

The upstream should receive in this format /x/y if the Http POST is coming in these format

• location /x/y/ ==> location /x/y
• location /x/y ==> location /x/y

This is the nginx configuration

  upstream backend {
            server 127.0.0.1:8778;
            # Number of idle keepalive connections per worker process.
            keepalive 35;
    }


    location /x/y  {        
                    limit_except POST {
                            deny all;
                    }
                    proxy_pass  http://backend;
                    proxy_buffering on;
                    include proxy.conf;
            }

The problem here is when the upstream see the URI is in this format /x/y/ it rejected the request, what should be the correct rewrite rule for this so that if the http post comes in the format like /x/y or /x/y/ the upstream should always see /x/y

Answer 1

The permanent will cause the rewrite to generate a redirect with a 301 response. What you need is an internal adjustment of the URI before sending it upstream:

location /x/y {
    rewrite ^/(.*)/$ /$1 break;
    ...
}

See this document for more.