[Zope] Index_html inside an image zclass

[Steve Alexander]

Brown Fox wrote:
> 
> Hello,
> i've added in an image zclass the index_html document.
> This file is shown, but variables are not working,
> starting from the <dtml-var id>.
> Why?

The index_html method of the Image class returns the image data, with
the correct Content-Type header.

From lib/python/OFS/Image.py:

    def index_html(self, REQUEST, RESPONSE):
        """
        The default view of the contents of a File or Image.

        Returns the contents of the file or image.  Also, sets the
        Content-Type HTTP header to the objects content type.
        """

You'll need to do one of the following:

  * Use another name than index_html for your intended purpose.

  * Extend Image.py from Python, in your own Python Product.

  * Use the Renderable base class:
      http://www.zope.org/Members/lalo/Renderable-ZClass

  * Write your own ZClass that is an ObjectManager, and have the
    image as one of its subobjects.

  * Do something with JPicture:
      http://www.zope.org/Members/jens/JPicture

--
Steve Alexander
Software Engineer
Cat-Box limited