Nginx - if $request_uri exists proxy_pass one url, otherwise another url

Question

I want to handle 2 cases: test.example.com and test.example.com/ABC.

If the entered url is the base domain (test.example.com), I want to proxy_pass a given endpoint (Let's say example.com/home).
If test.example.com/ABC is given, I want to proxy_pass to example.com/confirm/ABC

test.example.com = https://example.com/home
test.example.com/ABC = https://example.com/confirm/ABC

I made the (1) work like so:

server {
     listen 443 ssl;
     listen [::]:443 ssl;

     server_name test.example.com;

     location / {
         proxy_pass https://example.com/home;
     }
}

But I couldn't figure out how to say "If $request_uri exists, proxy_pass to different endpoint". I tried:

location / {
    if ($request_uri) {
       proxy_pass https://example.com/confirm/$request_uri;
    }
 
    proxy_pass https://example.com/home;
}

How can I achieve this?

Richard Smith · Accepted Answer · 2020-07-30 17:54:24Z

3

$request_uri always exists and is never empty. The URI for the root of your domain is a single / (even if it's not displayed in the browser's address bar).

The location block which matches that URI is location = /. See this document for details.

For example:

location = / {
    proxy_pass https://example.com/home;
}
location / {
    proxy_pass https://example.com/confirm/;
}

The first location block only matches the root URI /, and the second location block matches any other URI. The remainder of the URI is automatically appended to /confirm/. See this document for details.

answered Jul 30, 2020 at 17:54

Richard Smith

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