[Xerte-dev] Re: Browser caching and problems it causes with each update

[Tom Reijnders]

Done :-)

Op 20-2-2016 om 23:57 schreef Smith, John:
> 3 sounds good to me too.
>
> John
>
>
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> -------- Original message --------
> From: Tom Reijnders <reijnders at tor.nl>
> Date: 20/02/2016 12:18 (GMT+00:00)
> To: For Xerte technical developers <xerte-dev at lists.nottingham.ac.uk>
> Subject: [Xerte-dev] Browser caching and problems it causes with each 
> update
>
>
> Hi,
>
> I've had several instances where we had a sudden increase of support
> calls after installing an update of XOT (i.e. from 3.0 to 3.1)
>
> Most of those were due to caching issues. i.e. new modelfiles were used
> against a previous cached version of xenith.js
>
> There are several solutions to this:
>
> 1. At a timestamp in the url that loads xenth.js , ie
> src="xenith.js?_=<?php echo $timestamp;?>" or similar
>
> The drawback of course is that xenith.js (and similar files) are not
> cached anymore, increasing the time needed to load an LO
>
> 2. Add a version to the filename of xenith.js, i.e. everytime something
> changes in xenith.js, change the version.
>
> This is the approach used by a lot of javascript libraries, cf. jQuery.
> But it it's painfull, and errorprone (or we have to have a build process).
>
> 3. An interesting variation could be the combination of 1. and 2.
>
> We have a version string maintained in the file version.txt in the root
> folder of the installation. This file is automatically updated when
> publishing zips for the community websites. We could add
> ?version='<contents of version.txt>' to all the files we want to reload
> after a new release, such as xenith.js
>
> Tests show that this works fine ans as expected. I would like to
> implement 3.
>
> Any objections, remarks, other solutions?
>
> Tom
>
>
> -- 
> --
>
> Tom Reijnders
> TOR Informatica
> Chopinlaan 27
> 5242HM Rosmalen
> Tel: 073 5226191
> Fax: 073 5226196
>
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-- 
--

Tom Reijnders
TOR Informatica
Chopinlaan 27
5242HM Rosmalen
Tel: 073 5226191
Fax: 073 5226196

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