Add API to HttpServerResponse to force writing the headers about tufao HOT 3 OPEN

As you can see on the doc:

[...] they will be automatically flushed when the first piece of body is written.

This is meant to be an useful abstraction, then I won't change the behaviour. flush() won't help you.

So, if I understood correctly, you cannot use end() because your message has a body and you would like to let the HTTP client to have access to the headers as soon as possible. You could use the writeHead() method taking a Headers object as argument. It's not documented to do that, but it is what it does. I'll leave this bug open until I fix the documentation. Does this solve your problem?

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That is a neat idea, I didn't look for other writeHead overloads. Unfortunately QNAM seems to only trigger metaDataChanged at the end of all headers. I understand that the issue is in QNAM and it is more than fine if you don't want to provide API to deal with such quirks.

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Unfortunately QNAM seems to only trigger metaDataChanged at the end of all headers

I see.

Another improvement would be to interpret a write(QByteArray()/*empty body*/) as a desire to send the headers. Do you think this would solve your problem?

Also, what Tufão series are you using (0.x, 1.x), then I can deliver the solution for this series first.

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