Return IP address of connecting client

[lukastribus]

You can find 2 different solutions here:

Reflect back to the client their IP address

At Discourse we often need to know what IP address a user might be coming from to diagnose their problems. We just got rid of a droplet that was serving this function and replaced it with a Lua function running inside HAProxy: reflectip = function(applet) applet:set_status(200) applet:add_header("cache-control", "none") applet:add_header("content-type", "text/plain") applet:start_response() applet:send(applet.f:src()) end core.register_service("reflectip", "http", reflectip)