1.2.1.8004
I've just discovered that upgrading has introduced a problem with my
app related to output buffering. I remember, a little while back after
a previous upgrade, that I found a another problem, in my email
component, because of the way buffering is handled in the controller.
I'm posting here in case somebody knows what's going on with Cake and
buffering and can point me in the right direction.
This latest problem is the method below. I'm basically trying to avoid
the Fileinfo functions.
protected function _getMimeType($filepath)
{
/* because mime_content_type is deprecated but the Fileinfo functions
* aren't quite there yet
*/
if (function_exists('mime_content_type'))
{
return mime_content_type($filepath);
}
else
{
ob_start();
system('/usr/bin/file -i -b ' . realpath($filepath));
//$type = ob_get_clean();
$type = ob_get_flush();
$parts = explode(';', $type);
return trim($parts[0]);
}
}
For some reason, when I'm overwriting a file--and ONLY when
overwriting--this method causes PHP to barf the "can't modify headers"
error. So, while I've got your attention, if you can imagine a reason
why this would only occur on overwrite, I'm all ears.
Anyway, as you can see, I've tried both ob_get_clean() and
ob_get_flush() with the same bad results. The manual is pretty
circumspect about which should be used in which situation. I'd
appreciate any pointers.
More specific to Cake, though, I'd like to know how best to handle
buffering. This is twice that an upgrade has broken something and so
I'd like to understand what the best practice is, if any.
BTW, the earlier problem, in the email component, was that rendering
both a plaintext and HTML view would result in the HTML view having
the plaintext content also. It turns out that $controller->output is
concatenated, so it had to be set to null after each render():
$msg = $this->controller->render(null, $layout, $view_path);
$this->controller->output = null;
This was fun to debug because it looked for all the world like the msg
parts were borked and I was looking at both the plaintext and HTML
parts when, in fact, it was just that the HTML part included a lot of
plaintext. I had to look real close before I realised what had
happened.
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