W3C home > Mailing lists > Public > public-html@w3.org > February 2010

Re: [Bug 8252] HTTP caching rules are _ignored_? What's wrong with extending Cache-Control to support user-agent caching instead of coming up with an entirely new mechanism?

From: Julian Reschke <julian.reschke@gmx.de>
Date: Sun, 14 Feb 2010 12:47:33 +0100
Message-ID: <4B77E2D5.6080403@gmx.de>
To: Jonas Sicking <jonas@sicking.cc>
CC: public-html@w3.org
Jonas Sicking wrote:
> On Sun, Feb 14, 2010 at 3:27 AM, Julian Reschke <julian.reschke@gmx.de> wrote:
>> Jonas Sicking wrote:
>>> Out of curiosity, for a document like:
>>> <!DOCTYPE html>
>>> <html>
>>> <head><title>...</title></head>
>>> <body>
>>> <img src="myPic.jpg">
>>> <img src="myPic.jpg">
>>> </body>
>>> </html>
>>> and with a GET request to myPic.jpg returning cache-control:no-cache
>>> Should this result in two requests being made to myPic.jpg? If not, is
>> No.
>>> that considered ignoring HTTP caching rules?
>> It depends on what HTML says about how the <img> tag is processed.
> How does it depend on what HTML says?
 > I.e. under what conditions would HTML requiring your "No" answer above
 > be violating the HTTP caching rules? And under what conditions would
 > requiring your "No" answer not violate the HTTP caching rules?
 > Or am I misunderstanding your answer?

It depends on whether the language requires the two tags to be treated 

For instance, in XSLT it is clearly stated that the result of fetching 
something using XPath's document() function can be re-used throughout 
the stylesheet execution.

Received on Sunday, 14 February 2010 11:48:13 UTC

This archive was generated by hypermail 2.3.1 : Wednesday, 7 January 2015 16:25:43 UTC