Remove temporary file with configurable delay

bot/bot.lua

@@ -29,6 +29,11 @@
   function ok_cb(extra, success, result)
   end
 
+  -- Callback to remove tmp files
+  function rmtmp_cb(file_path, success, result)
+     os.remove(file_path)
+  end
+
   function msg_valid(msg)
     if msg.text == nil then
       return false
@@ -145,7 +150,7 @@
     return result
   end
 
-  function download_to_file( url )
+  function download_to_file( url , noremove )
     print("url to download: "..url)
     req, c, h = http.request(url)
     htype = h["content-type"]
@@ -171,6 +176,11 @@
     file = io.open(file_path, "w+")
     file:write(req)
     file:close()
+
+    if noremove~=nil then
+       postpone(rmtmp_cb, file_path, config.rmtmp_delay)
+    end
+
     return file_path
   end
 

bot/config.json

@@ -1,4 +1,5 @@
 {
+       "rmtmp_delay": 20,
     "google_api_key": "",
           "log_file": "/var/www/html/log.txt",
         "sh_enabled": false,