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Re: Persistent connections: current implementations?

From: Alexei Kosut <akosut@nueva.pvt.k12.ca.us>
Date: Tue, 28 Jan 1997 23:10:34 -0800 (PST)
To: Ka-Ping Yee <kryee@wheat.uwaterloo.ca>
Cc: www-talk@www10.w3.org
Message-Id: <Pine.HPP.3.95.970128230635.228C-100000@ace.nueva.pvt.k12.ca.us>
On Tue, 28 Jan 1997, Ka-Ping Yee wrote:

> If anyone on this list knows about clients and/or servers which
> currently support persistent connections, could you let me know?
> Do they all use the "Connection: Keep-Alive" header to indicate
> that a connection should be held open?

Apache 1.1 and later support persistent connections with Connection:
Keep-Alive for any document that would return with a Content-length
header. Apache 1.2 and later also do HTTP/1.1 persistent connections
(when a HTTP/1.1 request was given, of course), on all non-error
responses (acheived with chunked transfer coding where necessary).

As far as I'm aware, current versions of Netscape Navigator and MSIE
(to name two popular web browsers) both support persistent connections
with the Keep-Alive methods.

> Do any clients or servers support the scheme where the server
> transmits all the inline images immediately after transmitting
> a document, even if the client doesn't ask?

I'm a bit unclear on what you mean here. Do you mean the GETALL
methods or whatnot? If you're implying that a server should be able to
respond to a GET request with inline images afterwards, that's a
rather bad idea, IMHO, given that HTTP/1.1 supports pipelining, and
the responses could get confused...

At any rate, Apache doesn't do either.

Alexei Kosut <akosut@nueva.pvt.k12.ca.us>      The Apache HTTP Server
URL: http://www.nueva.pvt.k12.ca.us/~akosut/   http://www.apache.org/
Received on Wednesday, 29 January 1997 02:35:10 UTC

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