How to set wildcard reverse proxy in Nginx-CodePudding

Suppose you have a request for the following json file.

e.g. https://example.com/aaa/bbb/ccc.json

I want to have Nginx handle 'aaa' as a fixed string, and 'bbb' and 'ccc' as changing strings.

In this case, I want the proxy to work ignoring the 'bbb' path in the URL. How should I describe this in a lcoation block in Nginx?

location /aaa {
   # I want to ignore 'bbb' path and return ccc.json. 'ccc' varies.
   alias /mydirectory/aaa;
   try_files $url;
}

CodePudding user response：

Locations in nginx can be defined with regular expressions (docs).

Depending on how specific you'd like to be, you might choose ~ for case-sensitive URI matching or ~* for case-insensitive URI matching. ^~ is also available as a prefix match, but note a match here will stop the engine from performing additional regex matching. Caveat emptor.

Something like this would be a relatively straightforward way to "absorb" the bbb (or any other combo of 1 or more letters, upper and lower case):

location ~ ^\/aaa\/[a-zA-Z]  {
  ...
}

In order to capture the ccc.json, you'll want to add a capturing group as well:

location  ~ ^\/aaa\/[a-zA-Z] \/([\w\.] ) {
    return 200 '$1';
}

Bonus: if you're using PCRE 7 (docs), you can name your capture:

location  ~ ^\/aaa\/[a-zA-Z] \/(?<filename>[\w\.] ) {
    return 200 '$filename';
}