How to use URI in proxy_pass for @location?

Question

Nginx

Seems like the simplest config, but

server {
    listen 80;
    server_name "test";
    
    location @remote {
        proxy_pass                  https://someremoteserver/api/;
        proxy_set_header        X-Real-IP $remote_addr;
        proxy_set_header        X-Forwarded-For f$proxy_add_x_forwarded_for;
        proxy_set_header        Host $http_host;
        proxy_next_upstream  error timeout http_404 http_502 http_504;
    }

    location / {
        root /home/www/test/;
        index index.html;
        try_files $uri $uri/ @remote;
    }
}

does not work. The error
"proxy_pass" cannot have URI part in location given by regular expression...
"/api/" cannot be removed. Although without it the error disappears.
How to redirect request to api?

Answer 1

You can just change $uri :

location @remote {
    rewrite (.*) /api$1 break;
    proxy_pass https://someremoteserver;
    ...
}

Here's what's in the documentation

If the URI is changed inside the proxied location using the rewrite directive, and the request will be processed with this configuration (break):

location /name/ {
        rewrite    /name/([^/]+) /users?name=$1 break;
        proxy_pass http://127.0.0.1;
    }

In this case, the URI specified in the directive is ignored, and the entire modified request URI is sent to the server.