HttpWebRequest.GetRequestStream returned stream does not send data immediately in .NET Core

[manureini]

I try to upload a large file with HttpWebRequest in .NET Core or .NET 5, but a "IOException: Stream was too long." is thrown.

The request is not send immediately and is somehow buffered.

repro:
https://stackoverflow.com/questions/61383052/httpwebrequest-getrequeststream-returned-stream-does-not-send-data-immediately-i

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Issue Details

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I try to upload a large file with HttpWebRequest in .NET Core or .NET 5 , but a "IOException: Stream was too long." is thrown.

The request is not send immediately and is somehow buffered.

repro:
https://stackoverflow.com/questions/61383052/httpwebrequest-getrequeststream-returned-stream-does-not-send-data-immediately-i

Author:	manureini
Assignees:	-
Labels:	area-System.Net, untriaged
Milestone:	-

[wfurt]

How big is the file? Do you have simple app to outline the code you use?

[manureini]

The file is around 8GB. I was able to use the HttpClient insted HttpWebRequest to workaround this issue

[wfurt]

That is good to know. This feels like we have int somewhere and that wraps around.

[stephentoub]

I expect this is the same issue as #18632 (albeit for GetRequestStream instead of GetRequestStreamAsync).

[manureini]

Yes could be a similar issue.
I'm able to workaround this with the HttpClient.
Thanks to the guy who helped on Stackoverflow ;)

[karelz]

Duplicate of #18632