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nginx mirror traffic and process with lua script

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Alex

I want to proxy requests to the backend_old server and process them with lua script. My nginx config:

upstream backend_old {
        server backend_old.com:443;
}
 
server {
        listen 80 default_server;
        listen [::]:80 default_server;
 
        location = /mypath {
                mirror /mirror;
                mirror_request_body on;
                proxy_pass https://backend_old/1.0/path;
       }

        location = /mirror {
                internal;
                access_by_lua_block {
                        ngx.exit(ngx.HTTP_FORBIDDEN)
                }
       }
}

I see data request completed to old_backend: [11/Jan/2022:23:59:32 +0000] 127.0.0.6 - - - _ to: 184.72.39.201:443: POST /mypath HTTP/1.1 upstream_response_time 0.088 msec 1641945572.657 request_time 0.087 enter code here

But mirror fails with: 2022/01/11 23:59:32 [error] 481#481: *158 open() "/usr/local/openresty/nginx/html/mirror" failed (2: No such file or directory), client: 127.0.0.6, server: _, request: "POST /mypath HTTP/1.1", subrequest: "/mirror", host: myhost

any ideas on how I can configure /mirror location properly?

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us flag
Tero Kilkanen
The documentation shows only `proxy_pass` as a target for `mirror`. Most likely you cannot process the mirror requests with lua.
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