ulTickleMe

[Dave Cragg]

On 3 Aug 2006, at 18:22, Mark Smith wrote:

> Dave, (or anyone else who knows),
>
> what is the ulTickleMe message that I see in the pending messages?  
> I'm assuming that the 'ul' connects it with libURL.

This was added to libUrl at some point to overcome an occasional  
problem with the "wait for messages" command which is used heavily in  
libUrl. The ulTickleMe message is sent every second while a socket is  
open and forces the "wait for messages" lines to stop waiting. If I  
recall correctly, the problem was specific to a particular engine  
version, so I should probably re-examine whether it is needed anymore.

With an ftp upload, it will continue to fire for a short time after  
the upload has completed, as the ftp session is kept open for  
possible re-use. (The default time is 15 seconds.) With http  
downloads, it will continue until the server closes the connection  
which varies from "immediately" to a number of minutes. (But a few  
seconds is typical.)

If you're running a routine that deletes all the pending messages, I  
doubt it will do any harm.

Cheers
Dave