On Jan 26, 7:38 pm, skylar <s...@larw.com> wrote:
> Hi,
>
> I'm working on a site using CakePHP that has various feeds in JSON and
> XML. I tried caching some of those feeds today using controller-level
> view caching and ran into an annoying problem - cached views don't
> seem to retain the mime type of the document. That is, in most cases,
> a cached view (not elements) will be served up as text/html by
> CakePHP, not the type of the original document.
>
> To recreate this, simply try offering a XML or JSON based view in a
> controller, cache it, then load it twice. (using parseExtensions()
> might also help) The first request works correctly (uncached request),
> but the second request will come back as text/html (except for an edge
> case around XML).
>
> The problem seems to be at line 508 of cake/libs/view/view.php. (I'm
> using 1.2.0.7962) This is where the view class outputs a cached view
> file, if valid. The only check here for alternative document mime-
> types is this confusing check for a layout named 'xml':
>
> if ($this->layout === 'xml') {
> header('Content-type: text/xml');
> }
>
> The cache file doesn't have any properties that retain the extension
> or type that would have been used by RequestHandler (or other code) to
> find the right content type. However, $this->here does capture the
> extension implicitly.
>
> It seems the proper thing for the caching mechanism to do is to store
> the content type as a variable in the view cache file (eg, $this->ext
> or $this->content_type) so that the proper header can be recreated
> with the cache request. However, I don't know much about the CakePHP
> internals so I'll defer primarily to explaining the situation in hopes
> of filing a good bug and rallying a fix. This seems like a major
> oversight in the caching system as feeds (ajax, json, xml) are
> becoming an increasingly critical part of any modern web application.
>
> Has anyone noticed this before? Known workaround (without modifying
> cake lib code)? Is a bug already filed on this that I couldn't find?
> Anything else I'm missing here?
That's how the book handles it:
http://thechaw.com/cakebook/source/views/layouts/rss/default.ctp
hth,
AD
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