Can proxy_cache(nginx) in front of internal location?

I want to using proxy_cache in front of internal location,but proxy_pass
not
work.my code like following:

location /proxy {
proxy_cache cache;
proxy_cache_key $uri;
proxy_cache_valid 200 304 10d;
expires 10d;
proxy_pass @bar;
}

location @bar {
internal;
content_by_lua ’
ngx.log(ngx.ERR,“sssssssssssssssssss”)
ngx.say(“yaha”)
';
}

proxy_cache must used with proxy_pass?any other method to do this?

Thanks.

Posted at Nginx Forum:
http://forum.nginx.org/read.php?2,247998,247998#msg-247998

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