问题:

HttpListener gives you response stream, but calling flush means nothing (and from sources it's clear, because it's actually doing nothing). Digging inside HTTP API shows that this is a limitation of HttpListener itself.

Anyone knows exactly how to flush response stream of HttpListener (may be with reflection or additional P/Invokes)?

Update: You can't http stream anything if you don't have a flush option or ability to define buffer size.

回答1:

Flush only works in most of the System.Net namespace when Transfer-Encoding is set to Chuncked, else the whole request is returned and Flush really does nothing. At least this is what I have experienced while working with HttpWebResponse.

回答2:

I've not tried this yet, but how about writing a separate TCP server for streaming responses? Then forward the request from the HttpListener to the "internal" tcp server. Using this redirect you might be able to stream data back as you need.

As for flushing it, they only way I see to do it is to simulate a dispose, without actually disposing. If you can hack into the HttpResponseStream object, tell it to dispose, unset the m_Closed flag, etc, you might be able to flush the streaming data.