Get network.request response headers in lua

I’m using network.request like this:

network.request( fullUrl, "POST", networkListener, params)

and receiving the response in my network listener as such:

local function networkListener( event )
    if ( event.isError ) then
        response = {};
    else
        response = json.decode(event.response);
    end
end

I am receiving the body response of the request but I want to receive the request’s response headers as well. How can I achieve this?

Thanks a lot!

The documentation for network.request says:

network.request( url, method, listener [, params] )

listener (required)

Listener. The listener function invoked at various phases of the HTTP operation. This is passed a networkRequest event.

And the documentation for networkRequest links to event.responseHeaders, which gives this example:

-- Print the Content-Type header value for a response
local function networkListener( event )
    print( "Content-Type of response is: " .. event.responseHeaders["Content-Type"] )
end