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RE: Large content size value

From: Larry Masinter <LMM@acm.org>
Date: Fri, 5 Jan 2007 11:22:44 -0800
To: <ietf-http-wg@w3.org>
Message-ID: <000d01c730fe$e062db70$67f0070a@adobenet.global.adobe.com>

One use case for large content size files that aren't downloaded
in entirety are JPEG2000 image files using only range retrieval,
e.g.:

http://www.jpeg.org/jpeg2000/j2kpart9.html

 "They are also intended, however, to enable random access to JPEG 2000
 files in the absence of JPIP. For example, the byte-range requests
 built into an unmodified HTTP (version 1.1) server could be used
 for this purpose."

Some JPEG2000 files are very large, but you never retrieve
the whole thing; for example, a satellite image of California.



"It is not realistic for the HTTP specification to expect that all
implementations uses bignum for every integer which may be transmitted
in the protocol."

is hyperbole. It's realistic to expect implementations to
use 64-bit integers for quantities that reasonably exceed
32-bit representations, and it's realistic to expect
implementations to check (and fail gracefully) when
any received protocol value exceeds its representation
capacity.

Larry

 
Received on Friday, 5 January 2007 19:23:02 GMT

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