The totalBytesExpectedToWrite of setDownloadTaskDidWriteDataBlock block returns -1

StackOverflow https://stackoverflow.com//questions/25055629

  •  21-12-2019
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Question

Where the totalBytesExpectedToWrite information comes from? At the moment it returns -1 for me, but it was returning proper size earlier. Is it from server information that now is not sent?

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Solution

This issue arose due to some sudden changes on my server, the files were delivered without file size in the header thus AFNetworking was giving -1. Once correct behaviour re-instantiated on server everything returned to normal state.

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