libUrlFtpUploadFile - reuse open sockets?

Bernard Devlin bdrunrev at
Wed Apr 15 03:27:46 EDT 2009

My initial thought on seeing Phil's posting was that it might be a
server setting and thus not something one can control at the client.

I thought this because a couple of weeks ago I stumbled upon a
discussion where SSH (for some user) was creating a new connection for
each command sent to the server.  It was fixed by changing a server
setting so that SSH re-used connections.  At least that's how my
memory of the discussion.


On Wed, Apr 15, 2009 at 4:23 AM, Sarah Reichelt
<sarah.reichelt at> wrote:
>> While using libUrlFtpUploadFile to upload a bunch of files to a server, I
>> find that libUrlFtpUploadFile opens a new socket for each upload. Even using
>> a callback message to start a new one when the current one finishes, I get a
>> "max number of connections" message back from the server when the server's
>> max number is reached. After this, the next few upload attempts fail due to
>> max number of connections; then as the open connections time out, new files
>> can successfully upload again.
> I had this problem with a particular server. I always get the new
> connection with every command, but not all servers mind this.
> My solution was to use libURLSetFTPStopTime and set it to a very small
> number. This supposedly allows re-use of an existing connection, but
> in my experience all it does it keep one open while still opening
> another. If you set it to a very low number, then connections will
> close more rapidly, so you should not reach the maximum number of
> connections allowed.
> HTH,
> Sarah
> _______________________________________________
> 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