unresponsive sequential post requests - libURL problem?
tsj at unimelb.edu.au
Wed Feb 29 18:51:45 CST 2012
Hi guys (Dave hopefully you're not too far away) - earlier on I asked about explicitly closing sockets to try and prevent Livecode becoming unresponsive following repeated post (over https) requests. Dave Cragg suggested setting the httpHeaders to "Connection: close header". This helped somewhat in that it allowed me to test for an open socket before the next request was sent (initiated by a user clicking various controls in the interface). If a socket was open then I simply ignored the user's clicks until it was closed again.
However, it still doesn't solve the underlying problem, and if I do stack up a few requests and Livecode typically becomes unresponsive (waiting for a lengthy period rarely solves the problem) and the only way to 'clear the pipes' is to hit command/control-period a couple of times. The first time generally frees up the cursor again (set to a custom cursor when the request is initiated) while the second time usually triggers an error message along the lines of...
error: 624,1521,1 (or slight variations on this)
...to be returned in the result following the post request.
This (possibly naively) leads me to think that the underlying problem might lie somewhere within libURL, with a handler or function that is reluctant to end. Is this possible? Any ideas or suggestions would be greatly appreciated.
Dr Terry Judd
Senior Lecturer in Medical Education
Medical Eduction Unit
Faculty of Medicine, Dentistry & Health Sciences
The University of Melbourne
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