I *think* both client and server have to agree/support keep-alive, and both have to be ready for the other guy to close the connection even though they agreed in advance to keep-alive. So you can use keep-alive, and it can work nifty, but ya gotta be ready for the server/client to claim to support keep-alive and they're gonna send you a close, and you gotta do the right thing. On Tue, March 21, 2006 6:31 pm, Jon Anderson wrote: > Chris wrote: >> That's the design of http - it's stateless. Each connection is >> treated >> separately and as such closes itself when it's finished. >> >> If you want to keep it open you'll need to create your own "service" >> that listens to a port and responds accordingly - which can be quite >> a >> lot of work. >> >> http://www.php.net/manual/en/ref.sockets.php >> > I can easily prove that HTTP can do it: Open a terminal or an SSH > connection to a unix machine, then type: > $ telnet <some web server> 80 > GET / 1.1 > Connection: Keep-Alive > > <server resonds, keeps connection open> > GET / 1.1 > Connection: Keep-Alive > > <server responds, keeps connection open> > GET / 1.1 > Connection: close > > <server responds, closes connection> > > Connections are capable of keeping themselves open for multiple > requests > - that's what "Connection: close" and "Connection: Keep-Alive" headers > are for. For example http://webservices.codingtheweb.com/bin/qotd > (with > WSDL http://webservices.codingtheweb.com/bin/qotd.wsdl). If you open a > connection to that with a soap client, you can make multiple requests > to > it. Trace it with ethereal or something, and you'll notice there's > only > one TCP connection setup (syn,syn/ack), followed by as many requests > as > you want, and eventually one TCP teardown (fin/ack,ack) if you set up > the soap client to send a close request at some point. > > The example script above may not be PHP (I don't have the code, as > it's > not mine - just a random example), so for all I know PHP may not be > capable of such a thing. It may even be a limitation of the web server > (apache2) or the server's setup. (I just don't know, so that's why I'm > asking here.) > > jon > > -- > PHP General Mailing List (http://www.php.net/) > To unsubscribe, visit: http://www.php.net/unsub.php > > -- Like Music? http://l-i-e.com/artists.htm -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
