[Zope] png content type woe

[Brian Lloyd]

> Recently, I've been converting GIF Images into png Images, 
> and found something wired, i.e.
> 
> The Content Type of the png Images are set to "image/x-png" 
> not to "image/png"
> Yes, this causes problem on *some* of the clients not on 
> *all* of them and I can *manually* reset the content type to 
> the official "image/png".
> 
> That said, I shall have lots of png images, so resetting 
> manually is simply not a viable option. Furthermore, even 
> though, I've browsed the sources of Zope and python 1.5.2 
> modules, failed to find the root of this problem.

What are you using to upload the .png files? I bet that what
is happening is that the client you are using to upload is 
saying that they are of type 'image/x-png'. When you upload
an Image (or File), it will store whatever content-type the 
client claims that the object is and return that as the 
content-type when the image/file is viewed (if the client
doesn't give a content-type Zope will guess, but the code for
guessing would have returned the right thing: 'image/png').


Brian Lloyd        brian@digicool.com
Software Engineer  540.371.6909              
Digital Creations  http://www.digicool.com