HttpClient progress not reported when using HttpBufferContent

Hi,
I'm using Windows.Web.Http.HttpClient to upload files to a range of services. It was working fine while using HttpStreamContent, but I had to change it to use HttpBufferContent to allow re-sending the request if the service failed(Resending a request using
HttpStreamContent throws a cryptic exception). Well the change worked, but the progress is broken now. When using HttpBufferContent it report to have sent the 100% of the bytes instantly which is a clear bug.
I hope you can improve these components, the api is very good, but the implementation is pathetic.
Regards,
Alvaro.
Alvaro Rivoir

HttpBufferContent moves all the data to lower networking APIs all at once. That is why progress jumps from 0% to 100%.
As you described, HttpStreamContent fails when the request needs to be sent twice (e.g., server requires credentials) and the given stream only implements
IInputStream. To allow the stream to be sent multiple times and show a more detailed progress, make sure to provide a stream that implements
IRandomAccessStream.
Using HttpStreamContent will show progress in multiples of 65536 bytes, since the stream is consumed in 65536 bytes long buffers.

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