Applescript determine Internet reachability - applescript

Question

I am recently experiencing unstable Internet connection I just want to make a program with applescript that reminds me when my Internet is reachable so I can go online. Basically the program checks the Internet by pinging google.com for example. I know I can run shell script using applescript, but the problem is, how to get the return value of the ping and put it in an if statement?

Answer 1

Pure AppleScript solution:
set testIP to chkUP("http://www.apple.com") or chkUP("http://www.google.com")
if testIP then
display dialog "Internet Connection is UP"
else
display dialog "Internet Connection is DOWN"
end if
to chkUP(theURL)
return (count (get ((theURL as URL)'s host & {dotted decimal form:""})'s dotted decimal form)) > 0
end chkUP

Answer 2

I've added two scripts.
The first one checks your internet connection once.
The second runs in the background every minute and displays a popup if it can reach the internet.
Script 1
try
set thePing to do shell script "/sbin/ping -o -c 5 8.8.8.8"
on error
set thePing to "no internet connection"
end try
Script 2
(*
1. Save as an Application: Script Editor > File > Export… > File Format: Application
2. Check "Stay open after run handler"
3. Run the app or add it to your login items: System Preferences > Users & Groups > User > Login Items > Press the "+" button
# http://stackoverflow.com/questions/43250408/applescript-determine-internet-reachability
*)
on idle
try
set thePing to do shell script "/sbin/ping -o -c 5 8.8.8.8"
if thePing does not contain "error" then
display dialog "The internet connection is up"
end if
on error
set thePing to "error: no internet connection"
end try
delay 60
end idle