Can Applescript tell if computer is online?

Hi there,
I would like to write a conditional Applescript. The script would
trigger itself every few hours and if the computer is not connected to
the Internet I would like it to execute some code. I have a bit of
experience with AS but have no idea how to go about this one.
Perhaps: "if Safari gets message "computer not connected to the
internet" then execute this code"...
Am I on the right track?

Thank you much

Karotto

In article
<a80b8e5e-7e80-4bf2-8215-497ef86c0e51.TakeThisOut@h11g2000prf.googlegroups.com>,
biz.TakeThisOut@theplayspace.com.au wrote:

> I would like to write a conditional Applescript. The script would
> trigger itself every few hours and if the computer is not connected to
> the Internet I would like it to execute some code.

You'll need to define what constitutes "connected to the Internet".
There is no way to ceck for that condition. However, if you define what
it means to *you*, tere will be certain conditions that *can* be checked
for. You could for instance check if the machines has a
non-self-assigned IPv4 address:

property s_saIP : "269.254"
set s_IP4 to IPv4 address of (system info)
if s_IP4 does not start with s_saIP then
-- we are connected to a network
doStuff()
end if

on doStuff()
-- do stuff
end doStuff

This assumes [1] that the Mac uses IPv4, [2] that is set up to be
assigned an address (by a DHCP server), [3] that the network the Mac
conects to is actually connected to/part of "the Internet".

For some reason (Tiger's) Standard Additions allows checking forthe
primary IPv4 address only. If you use IPv6 or care about different
network interfaces (Ethernet, Airport, FireWire, etc.), you'll prolly
need to use do shell script.

> I have a bit of
> experience with AS but have no idea how to go about this one.
> Perhaps: "if Safari gets message "computer not connected to the
> internet" then execute this code"...
> Am I on the right track?

Yes, except that the Web, let alone Safari, is not "the Internet". It's
perfectly possible to be connected to the Internet and yet not be able
to fetch something off the Web.

--
Sander Tekelenburg, <http://www.euronet.nl/~tekelenb/>

Mac user: "Macs only have 40 viruses, tops!"
PC user: "SEE! Not even the virus writers support Macs!"