computercraft internet

if fs.exists("news") then
  fs.delete("news")
end

http.request("http://guus.netai.net/test/computercraft-lua")
 local requesting = true
 while requesting do
   local event, url, sourceText = os.pullEvent()
   if event == "http_success" then
     local respondedText = sourceText.readAll()
     -- print(respondedText)
     requesting = false
     file = io.open("news", "w")
     file:write(respondedText)
     file:close()
   elseif event == "http_failure" then
     print("Server didn't respond.")
	 sleep(2)
	 os.shutdown()
     requesting = false
   end
 end

shell.run("nieuwslezer")