Proxy configuration

[o1da]

How to configure a connection to e.g. Squid proxy which runs on localhost? I need to send requests to an endpoint on the internet through this proxy. In the proxy example, it seems that httpc:connect(HOST, PORT) is for endpoint configuration. So how should I tell LUA to use the proxy on the specific port on the localhost? Is it possible?

local http = require "resty.http"
local httpc = http.new()

httpc:set_timeout(500)
local ok, err = httpc:connect(HOST, PORT)

if not ok then
  ngx.log(ngx.ERR, err)
  return
end

httpc:set_timeout(2000)
httpc:proxy_response(httpc:proxy_request())
httpc:set_keepalive()

[o1da]

I have just realized that I wanted to use it as forward proxy and example speaks about reverse proxy, so the solution would be Squid configured like the reverse proxy - URL for the endpoint configured there and LUA connected to Squid. Am I correct or completely wrong? :)

[qrof]

The best way to handle external connections is to create an nginx upstream (local reverse proxy) and then use ngx.location.capture to do requests to this local endpoint

in nginx.conf

    location ~* /interneturl/(.*)$ {
            proxy_pass http://www.someinternetsite.com/$1$is_args$args;
            proxy_redirect off;
            proxy_http_version 1.1;
            proxy_set_header Connection "";
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    }

then in lua script: local resp = ngx.location.capture("/interneturl/content/" .. param, { method = ngx.HTTP_GET })

etc...

only time I would use lua resty http is when you need to dynamically set target domain / IP

so you dont need squid, just use nginx for reverse proxy, this way all is non-blocking

[o1da]

Thank you :)