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intermediaries, implicit gzip, etags, no-transform

From: Julian Reschke <julian.reschke@gmx.de>
Date: Fri, 20 Jun 2014 17:12:20 +0200
Message-ID: <53A44F54.9080109@gmx.de>
To: HTTP Working Group <ietf-http-wg@w3.org>
Hi there,

so I played around with Google's Data Compression proxy and Opera's 
Turbo today, and found:

- both implicitly use content-coding gzip, but do not touch the Etag, 
potentially breaking HTTP semantics

- GDCP adds a custom header field describing the original content length 
(which of course has not been registered)

- setting "cache-control: no-transform" on the response, does not change 
this behavior, thus both seem to violate a "MUST NOT" requirement from 

Best regards, Julian
Received on Friday, 20 June 2014 15:12:54 UTC

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