[Qt-interest] Persistent HTTP connections

[Markus Goetz]

ext Mandeep Sandhu wrote:
> HTTP 1.1 supports persistent connection by default, i.e the server
> won't close the connection unless explicitly told so by the client by
> sending the connection close header. Is it true for HTTP requests sent
> out by QNetworkAccessManager?
>   
Yes :)
> Once I receive the finish signal, does it automatically send a
> connection close header or is that done only if I call abort() or
> something else?
>   
What do you mean? It can't send a header after the request is already 
processed&finished
> Basically, I want to send my _second_ http request using the same
> connection that was setup when the first HTTP request was made. If i
> simply make the second request after the first one finished, will it
> reuse the same connection? If not, how can this be achieved?
>   
In theory, it should work like that. Have you tried checking with a 
network sniffer? If it's not like that, we have a bug (or let's call it 
performance regression) in Qt.

To be very sure, I would suggest to not create and send the request from 
the finished() slot but one event loop spin after that. You can achieve 
this by using a single shot timer set to 0 msec and sending the request 
from the timer's slot.


Markus