I'm not sure what you mean by 'continuation'. The server operates on a well 
defined packet (request), which can then be followed contextually by variable 
packets and/or data.

-Carl

> On Oct 7, 2016, at 1:18 PM, Shawn Erickson <[email protected]> wrote:
> 
> Note https://developer.apple.com/reference/foundation/urlsessionstreamtask 
> <https://developer.apple.com/reference/foundation/urlsessionstreamtask> 
> exists however I am unsure about its progress feedback. You also have CF 
> networking to look at for something a little higher level then sockets.
> 
> What does your server backend support in terms of continuation?
> 
> -Shawn
> On Fri, Oct 7, 2016 at 1:10 PM Carl Hoefs <[email protected] 
> <mailto:[email protected]>> wrote:
> Hmm, NSURLSession seems to require HTTP session interaction. The OS X server 
> I'm uploading to is not web-based but simply socket-based. 
> 
> -Carl
> 
>> On Oct 7, 2016, at 1:01 PM, Shawn Erickson <[email protected] 
>> <mailto:[email protected]>> wrote:
>> 
>> 
>> https://developer.apple.com/reference/foundation/urlsessionuploadtask 
>> <https://developer.apple.com/reference/foundation/urlsessionuploadtask>
>> 
>> On Fri, Oct 7, 2016 at 12:45 PM Carl Hoefs <[email protected] 
>> <mailto:[email protected]>> wrote:
>> My understanding is that NSURLSession is only for downloading. I need to 
>> upload.
>> 
>> -Carl
>> 
>>> On Oct 7, 2016, at 12:42 PM, Shawn Erickson <[email protected] 
>>> <mailto:[email protected]>> wrote:
>>> 
>>> Any reason you aren't NSURLSession for this? You can provide a file stream 
>>> in the request, etc.
>>> On Fri, Oct 7, 2016 at 12:14 PM Carl Hoefs <[email protected] 
>>> <mailto:[email protected]>> wrote:
>>> My iOS 9.3 app uploads large (100MB) video files to a backend OS X server 
>>> for processing. If I use write(2) on a socket from a background thread, it 
>>> works but I get no feedback on the progress of the upload until it's 
>>> completed. And if the transfer gets interrupted, it must restart from the 
>>> beginning.
>>> 
>>> I've noticed that certain classes such as AVAssetExportSession provide a 
>>> 'progress' property, so I'm wondering:
>>> 
>>> 1) Is there a better way to accomplish large data transfers?
>>> 2) Is there a way that provides progress information?
>>> 3) Is there a way that provides checkpointing in case of interruptions?
>>> 
>>> -Carl
>>> 
>>> 
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