Flush alias

[gigabo]

Hi,

This adds res.flushCompression() as an alias for res.flush()

This supports use such as:

// Not going to write again for a while.  If compression middleware is
// installed let's tell it to flush what we've got through to the client.
if (res.flushCompression) {
    res.flushCompression();
}

Currently the res object has a flush method regardless of whether compression middleware is installed. The built-in flush method issues a noisy deprecation warning. This patch provides an alias for the flush method to allow detection of the compression middleware's flush.

This addresses #72.

Thanks,

Bo

[rexxars]

This would help me as well - any feedback on this @dougwilson?

[wKovacs64]

This would be nice. Any chance of a quick review, @dougwilson?

[dougwilson]

In parallel, we can probably think of a good way to indicate if the response is getting compressed in a unique way that is obvious and doesn't conflict too much (darn Node.js taking res.flush() ;) ).

[bjohansebas]

I'm not sure about adding this property, I'll ping on Slack in case anyone has feedback to share.

cc: @expressjs/express-tc

[bjohansebas]

.flush is no longer a method on HTTP OutgoingMessage, so this method is no longer needed

https://nodejs.org/api/deprecations.html#dep0001-httpoutgoingmessageprototypeflush