Why doesn't IIS support chunked transfer encoding?

Question

I am making an HTTP connection to an IIS web server and sending a POST request with the data encoded using Transfer-Encoding: chunked. When I do this, IIS simply closes the conn

Answer 1

My only guess is they did not implement it out of concerns for security. In a naive solution it would be easy to set up a DOS attack by starting multiple chunked transfers that never end. And a complex solution which could account for the DOS attack is probably not worth the effort.

Of course I cannot speak for Apache or IIS, you may be able to contact the Apache team directly though: http://httpd.apache.org/bug_report.html

I agree with MarkR that I always thought chunked encoding could only be used as a response, but the documentation sure makes it sound like it can be used in a request or a response.