- From: Lorenzo Vicisano <vicisano@iet.unipi.it>
- Date: Fri, 17 Nov 1995 22:08:30 +0000 ()
- To: Ari Luotonen <luotonen@netscape.com>
- Cc: http-wg mailing list <http-wg%cuckoo.hpl.hp.com@hplb.hpl.hp.com>, luigi@iet.unipi.it
>
> I'm all for addition of Proxy-Connection: keep-alive to the spec; more
> specifically:
>
> - if there are no proxies involved, everything's normal
> - if the client talks to a proxy, it *never* sends a Connection: keep-alive
> - if the client talks to a proxy and wants a persistent connection,
> it will send Proxy-Connection: keep-alive; the proxy can still
> respond with Connection: keep-alive
> - a proxy can now independently support Connection: keep-alive
> between itself and the servers, and itself and the client
> - the proxy will intercept a Connection: keep-alive received from a
> remote, as it is a reaction to the Connection: keep-alive sent by
> itself, and should not be forwarded to the client
> - a proxy will generate a new Connection: keep-alive to the client as
> a response to Proxy-Connection: keep-alive
>
> This way, there is never a case where a client talking to an old proxy
> server would fool it to forward the Connection: keep-alive to the
> remote, and then the remote would respond with it, but the proxy would
> close the connection in between.
It still does not work with the following (chained-Proxies) configuration:
(C) <--------> (P1) <--------> (P2) <--------> (S)
^ co1 ^ co2 ^ co3 ^
| | | |
NEW OLD NEW ?
- `C' sends `Proxy-Connection: keep-alive' to `P1'
- `P1' is not compliant and ignores that header field forwarding
it to `P2'
- `P2', receiving `Proxy-Connection: keep-alive', supposes to talk
to a compliant client and decides to keep alive `co2' connection,
whereas `P1' is waiting P2 to close connection after its response.
The `Connection: Keep-Alive my-name' solution allows each compliant
proxy to realize whether is talking to a compliant proxy/client or not.
Cheers,
Lorenzo
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| Lorenzo Vicisano | http://www.iet.unipi.it/~vicisano |
| Dip. di Ingegneria dell'Informazione | e-mail vicisano@iet.unipi.it |
| Universita' di Pisa | Phone +39-50-568654 |
| Via Diotisalvi, 2 56100 PISA, ITALY | Fax +39-50-568522 |
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Received on Friday, 17 November 1995 13:19:42 UTC