I have a situation in which it's sometimes necessary to cancel a bunch of in-flight download tasks, then re-issue them. The problem is, the URLs need to change.
Here's what happens. I make a request for a catalog of files. The response contains a bunch of signed S3 URLs. I then issue a download task for each of those URLs on a session. If it takes too long to complete, the URLs expire, and I start getting 403 responses from S3. At this point, I want to cancel all remaining tasks, and issue a single request to the catalog again. Then I'll issue new downloads for any files I didn't already get. I don't see a good way to do this, though. I don't see any way to be sure that all the canceled tasks canceled or completed, because I don't necessarily get a call back to tell me each one is canceled. Any of them could complete just before or just after I cancel (or at the same time). Is there any way to address this? Thanks. -- Rick Mann rm...@latencyzero.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Macnetworkprog mailing list (Macnetworkprog@lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/macnetworkprog/archive%40mail-archive.com This email sent to arch...@mail-archive.com
