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[Bug 11895] Make Downloads more reliable by specifying checksums

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Date: Thu, 27 Jan 2011 20:45:14 +0000
To: public-html-bugzilla@w3.org
Message-Id: <E1PiYiQ-0006wi-KK@jessica.w3.org>
http://www.w3.org/Bugs/Public/show_bug.cgi?id=11895

--- Comment #2 from Andrew Roth <andrew.in.snow+w3c@gmail.com> 2011-01-27 20:45:13 UTC ---
I had not heard of this before (sorry for not researching better).

I found the spec:
http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.15
And the support in Apache:
http://httpd.apache.org/docs/2.2/mod/core.html#contentdigest

Do you know of any website that implements this?  Or if the major user agents
(Firefox/IE/Chrome) support it?

This places a burden on the server because it has to compute the checksum upon
every request.  It would be much better to compute it once, and serve it many
times.

To my knowledge, I don't know of any websites that implement this for large
file downloads.  Implementing this change would make it easier for developers
and publishers to ensure files are downloaded correctly.

I will try to check and research more on its implementation.

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