[Zope] img src (newbie)

[Tres Seaver]

jessica lee tishmack <jlt29707@sci.tamucc.edu>
> 
> >
> > Say, for example, you uploaded an image called foo_jpg (Zope does not
> > allow dots in object names). You could reference it from any object in
> > the same folder as the image or nested folders using dtml-var
> >
> >       <dtml-var foo_jpg>
> 
> Thank you for your input..I think I need to explain myself a little
> better, however.  I have no trouble with a static image...the trouble I am
> having is with images created on the fly.
> 
> For example, I have a cgi program (which I would like to continue residing
> in my linux structure.....static pages I would like to be in
> my Zope structure).  This program will generate a graph based
> on the time units, and whatever particular data sets I pass as parameters
> to the program.  So, the image can't be stored on  Zope, since the image
> may be different each time it is brought up...for example, I have the
> ability to pass the word "today" as a parameter...this means that
> everyday, the graph generated will be different.  Is there a way for
> Zope to respond to a cgi program that's being called as "img src" value?

I think maybe the issue got clouded by the phrase, "server-side includes".
What you are asking for is not a server-side include:  you want to generate a
tag in Zope, something like:

  <img src="build_graph?units=hours&series_a=hit_count&series_b=load_factor">

This isn't SSI because the browser makes a separate request for the image,
after/while loading the page containing the tag;  SSI is massaged by the server
before the browser ever sees the text.

That said, it *is* feasible to build a parameterized image link, using exactly
this kind of syntax.  There are a couple of contributed products which do
on-the-fly image generation:

  * "gdchart":http://www.zope.org/Members/teyc/ZGDChart 
 
      "draws charts using data from your ZSQLMethod"

  * "TTImage":http://www.zope.org/Members/RainDog/TTImage

      Converts text strings into a GIF/PNG/JPEG images using
      TrueType fonts.

I may have even missed one -- check out the "Zope
Products":http://www.zope.org/Products page.

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Tres Seaver         tseaver@palladion.com    713-523-6582
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