esp8266 nodemcu lua wget external file via http

[GumSlone]

Here is a simple wget function for esp8266 nodemcu lua, which gets a remote file and saves it locally. Your esp8266 has to have the http and file module included in its firmware.
https://nodemcu.readthedocs.io/en/ma.../modules/http/
https://nodemcu.readthedocs.io/en/master/en/modules/file/

here is the function:

function wget(url,file_name)

    http.get(url, nil, function(code, data)
        if (code < 0) then
            print("HTTP request failed")
        else
            -- print(code, data)
            -- open file in 'w' mode
            if file.open(file_name, "w") then
              -- write text to the file
              file.write(data)
              file.close()


            end
        end
      end)

end

usage:

wget("http://example.com/file.txt", "local_file_name.lua")

the usage example shows how to get contents of external file.txt and save the contents to the local_file_name.lua