Support WriteAsync cancellation token #1645
Merged
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Fixes #1422
Turns out it was pretty complicated, especially retries and hedging. PR adds support in all places:
Also fixed a bug when hedging and writing a large message to a client stream which causes the call to be committed because it exceeded buffer size. I found this while testing.
Also fixed a bug where the server would silently continue if it was aborted while writing a message. Now throws OperationCanceledException.
Note: Contains some changes from #1644 because Grpc.Core.Api needed to be updated.