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Re: HTTP/1.1 pconns to 1.0 servers

From: Stefan Eissing <stefan.eissing@greenbytes.de>
Date: Thu, 21 Sep 2006 16:23:02 +0200
Message-ID: <4512A046.5080406@greenbytes.de>
To: Jamie Lokier <jamie@shareable.org>
CC: Mark Nottingham <mnot@yahoo-inc.com>, ietf-http-wg@w3.org

Jamie Lokier schrieb:
> Stefan Eissing wrote:
>>> However, the widely deployed Squid proxy cache 
>>> <http://www.squid-cache.org/> does not behave in this manner; it 
>>> requires a Connection: keep-alive header (or Proxy-Connection, but 
>>> that's another discussion) in requests in order for them to persist.
>> I struggled with exactly the same issue when implementing a HTTP stack. 
>> Someone forced me with money to make it work with squid as it is widely 
>> deployed. Those were the days...
> What is the difficulty with writing a client to work with Squid?
> If you omit the "Connection: keep-alive", you'll just get a
> non-keepalive connection, but it'll work fine.  Isn't that right?

With "make it work" I meant "working well". You are right that a 
correctly implemented client will just see the missing "keep-alive" and 
rightly assume that the connection will be closed. I was struggling with 
the "correctly implemented" and the "rightly assume" at that time and 
the variety of server behaviours did not exactly help.

It would be "nice" for an HTTP/1.1 client to achieve persistent 
connections without sending "keep-alive" as default - so I understood 
Mark's initial post. But, as I wrote, this is not the case nor do I see 
anything which can be done about it.


Received on Thursday, 21 September 2006 14:23:12 UTC

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