Keep-alive support

[felicienfrancois]

In case of multiple consecutives requests, keep-alive is a good perf boost.
It is enabled by default in request but it does not seems to be supported with a proxy.
Is there any limitation due to tunneling or can this be achieved ?

[julianduque]

Having the same issue, even if the headers are set the tunnel connection is dropped on every request and the connection isn't persistent.

[djyde]

+1

[mikeal]

What version of Node.js? Big changes have landed in the core HTTP implementation since this was initially written.

[djyde]

@mikeal Node v6.x

[julianduque]

@mikeal I had this issue with 4.x and 6.x

[m0nzderr]

Any progress on keep-alive? It still does not seem to work.

[flotwig]

This library doesn't support Keep-Alive, but https://github.com/mknj/node-keepalive-proxy-agent seems to support it!

[millerick]

Unfortunately this is the library that is used by https://github.com/faye/faye, so I was hoping there would be a way to get keep alives working here.