On Thu, Mar 5, 2009 at 1:26 PM, Jsbeginner <jsbeginner@xxxxxxxxxxxxxx> wrote:
> Thankyou Andrew Ballard and 9Tel ,
You're welcome. However, you forgot to reply to the list.
> You both suggest that it's not necessory to set the Content-Length except
> for images etc ... well the problem is that I also need to use this script
> for showing images as well as css and javascript.
As I understand, there is no point in using gzip to serve images since
they are usually already compressed and/or not very well suited to
textual compression. In fact, I suspect that if you serve a document
with a Content-Type of image/gif, image/jpeg, image/png, etc., either
PHP or Apache will detect that and bypass the gzip handler. (That's
just a guess, though. I don't have any way at present to test that
theory.)
> It's actually part of the dotclear blog system, it's plugin system uses a
> very similar code but fetching the mime type automaticaly.
> And it's not part of one plugin but used for all the plugins so if any
> plugins are installed on any dotclear installation on the server there will
> be a lag.
>
> Also I don't see how it would be possible to check file size after gzip ...
> doesn't PHP take the file and then pass it through gzip changing the size on
> the way ?
Based on Nisse's response, I think you're better off leaving the
Content-Length header out entirely (as we already suggested).
> I guess I will have to send an e-mail to the dotclear team to ask their
> advice.
>
> Thankyou.
>
> Andrew Ballard a écrit :
>
> On Thu, Mar 5, 2009 at 12:34 PM, Jsbeginner <jsbeginner@xxxxxxxxxxxxxx>
> wrote:
>
>
> Thankyou,
>
> I took "application/x-javascript" directly from the apache setup for my
> domain so this should be correct.
>
> However I've just deactivated gzip (zlib.output_compression OFF in php.ini)
> and that stopped the problem.
> I've given you a simplified version of the script that has the exact same
> problem (the original one gets the mime type automaticaly and has the same
> problem with any files that are gziped (css, html, javascript etc... but not
> images.).
>
> So the problem seems to have someting to do with this line :
>
>
>
> header('Content-Length: '.filesize('test.js'));
>
>
> and with gzip ...
>
> I would like to be able to activate gzip again but I need to work out why
> I'm getting this bug first.
>
> Apache isn't installed with mod_deflate, should I look into doing this
> instead of turning zlib.output_compression on again ?
>
> Is there maybe a bug with PHP 5.2.9 that's causing this problem?
>
> Thankyou :)
>
> haliphax a écrit :
>
>
> If you use gzip'd output, does PHP automatically generate a
> Content-Length header? It seems to me that the value for
> Content-Length should be the compressed size, not the uncompressed
> size that you are sending. Besides - do you really need to send
> Content-Length? I don't usually see it sent, and the only time I've
> seen it make a difference is if I'm sending the file as an attachment
> (prompting the browser to save the file rather than displaying it). If
> removing the line eliminates the problem, I'd just remove the line and
> be done with it.
>
> Andrew
>
>
>
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