any way to detect condition "connected to ISP but not internet"?

Josh Mellicker josh at
Wed Feb 11 15:01:13 EST 2009

We were just thinking more on this, and it seems that there are some  
corporate networks that allow http:// but not other protocols?

In other words, people can surf websites but not download?

If this is true, rather than using "ping" in the process, we are  
thinking it might be better to issue an FTP command to test  
downloading of a small test file. If this fails, we would know that  
Revolution downloading will not work.

Again, if we can solve this, it means a huge breakthrough for  
Revolution- being able to auto-update, for example, without the risk  
of hanging.

On Feb 11, 2009, at 11:46 AM, Josh Mellicker wrote:

> On Jan 23, 2009, at 5:07 PM, Alex Tweedly wrote:
>> To feel safe, I'd want to do the network check in a separate  
>> process, and have a fail-safe mechanism within the real app (i.e.  
>> it detects failure rather than waiting for it). So I'd use a  
>> backgrounded shell command which creates a temp file, and have the  
>> real app check for that file being created/updated. Could be a ping  
>> shell command, or a small standalone which loads a url, or anything  
>> similar - as long as it's a separate process.
> -- Alex.
> We are finally testing this.
> Could I ask a favor?
> Would someone who is behind a proxy server or corporate firewall  
> test this code:
> on mouseUp
>   put "ping -c 1" into tCmd
>   open process tCmd FOR update
>   wait 1 second with messages
>   read from process tCmd until empty
>   put it
>   close process tCmd
> end mouseUp
> ?
> The question is:
> Will this code return a valid IP (in "it") even when normal  
> Revolution ftp commands will not work?
> I am hoping the answer is "NO".
> If this works, it may mean, for the first time I'm aware of, we all  
> have a way for checking if connected that will NEVER hang  
> Revolution! Yipeee!
> Thanks!
> _______________________________________________
> use-revolution mailing list
> use-revolution at
> Please visit this url to subscribe, unsubscribe and manage your  
> subscription preferences:

More information about the Use-livecode mailing list