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RE: What is Content-Length?

From: Josh Cohen <joshco@microsoft.com>
Date: Sun, 14 Dec 1997 03:55:49 -0800
Message-Id: <21FD6499922DD111A4F600805FCCD6F2F31BF0@red-86-msg.dns.microsoft.com>
To: "David W. Morris" <dwm@xpasc.com>, John Franks <john@math.nwu.edu>
Cc: "Roy T. Fielding" <fielding@kiwi.ics.uci.edu>, http-wg%cuckoo.hpl.hp.com@hplb.hpl.hp.com, http-wg%cuckoo.hpl.hp.com@hplb.hpl.hp.com, http-wg%cuckoo.hpl.hp.com@hplb.hpl.hp.com, mutex@clock.org
X-Mailing-List: <http-wg@cuckoo.hpl.hp.com> archive/latest/4953

> -----Original Message-----
> From:	David W. Morris [SMTP:dwm@xpasc.com]
> Sent:	Wednesday, December 10, 1997 8:23 PM
> To:	John Franks
> Cc:	Roy T. Fielding; http-wg%cuckoo.hpl.hp.com@hplb.hpl.hp.com;
> http-wg%cuckoo.hpl.hp.com@hplb.hpl.hp.com;
> http-wg%cuckoo.hpl.hp.com@hplb.hpl.hp.com
> Subject:	Re: What is Content-Length? 
> On Wed, 10 Dec 1997, John Franks wrote:
> Exactly HOW would a server know transfer-length before sending
> data? I can define a reasonable use of content-length in the
> trailer of a chunk-encoded transfer ... since content length is
> the entity length, it could serve as a double check of the
> receipt of the chunk-encoded entity.  But clearly, transfer
> length couldn't appear in the trailer as the length wouldn't
> be known until after the trailer was complete.  It makes no
> sense to me for a server which knows the length of the transfer
> encoded entity to ever use transfer encoding.
> Sounds like protocol cruft to me.  What am I missing?
	[Joshua Cohen]  
	I didnt realize that we intended all future TEs to be used for
unknown length
	entities.  It seems logical that someone might use TE for
encryption, which
	could still have a known length at transmission time.
> Dave Morris
Received on Sunday, 14 December 1997 03:58:27 UTC

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