How does ODK Collect break a submission into multiple requests?

If I understand things correctly, Collect will sometimes break a form submission into multiple requests if the attachments are too large. Is this documented somewhere? Is there a header that can be used to match these multiple requests? Or is it necessary to match on the InstanceID?


You can read about the OpenRosa Form Submission API at

Collect doesn't currently use the X-OpenRosa-Accept-Content-Length header (though it could/should) but always splits files into 10Mb posts. If a file exceeds 10Mb, it will be sent in its own post with the submission XML.

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