如何使用nginx内置的proxy cache

> How to use the cache feature?

Here is configuraiton example:

http {

    ...
    proxy_cache_path /path/to/cache levels=1:2 keys_zone=NAME:10m inactive=5m max_size=2m;

    ...

server {
    location / {
    proxy_pass

    proxy_cache NAME;

    proxy_cache_valid 200 302 1h;
    proxy_cache_valid 301 1d;
    proxy_cache_valid any 1m;

    proxy_cache_min_uses 1;

    proxy_cache_use_stale error timeout invalid_header http_500;
    }
}

The cache currently ignores backend's Cache-Control, Expires, etc.