Music proxying through nginx?

Question

Nginx

there is a php site on
it you can play music through the Contact
player accesses the file /mp3.php?url=link_to_file_from_vk.mp3 (where fopen, fread happens)
it turns out that Apache heavily loads the server.
what needs to be written in the nginx config to make proxying through nginx.
ps direct links will not work, tk. VK generates mp3 links taking into account the ip-server.

Answer 1

(where fopen, fread happens)

php.net/manual/en/function.readfile.php - pay special attention to the notes.

Answer 2

location /mp3.php {
rewrite .+ $arg_uri break;
proxy_pass $arg_server;
}

Just need to convert the link to

/mp3.php?uri=/path/to/mp3&server=http://downoad.vk.com