[Zope] Returning a pil generated image from a python product

[Sean K]

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I am writing a product that returns an image generated by pil (unfortunately it doesn't): 

Create image-

im = PIL.Image.new('RGB',(width,height))

it is then drawn-

draw = ImageDraw.Draw(im)

draw.rectangle([0,0,width,height], fill=(250,250,250)) etc etc etc

after it is ready to be sent out I "save" it -

pic = cStringIO.StringIO()
im.save(pic, 'GIF')

and send it

 pic.seek(0)
 RESPONSE.setHeader("Content-type", "image/gif")
 RESPONSE.write(pic.read())

 

my index_html

<dtml-var standard_html_header>
<IMG src="./dynamicImage?RESPONSE=RESPONSE">
<dtml-var standard_html_footer>

 

the product class inherits Item, Persistent and Implicit

the dynamicImage method has an argument RESPONSE

When I click on view all I get is an image placeholder box (true as well when using the same image tag in a dtml method in the root folder), however from a dtml method in the root folder <dtml-var expr="TestObject.dynamicImage(RESPONSE)"> will render an image as the only content. any other content in the method is ignored.


This is my first attempt at a product, so after much hair pulling I must get it to work.

Thank you in advance for any help

Sean K



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<P>I am writing a product that returns an image generated by pil (unfortunately it doesn't): </P>
<P>Create image-</P>
<P>im = PIL.Image.new('RGB',(width,height))</P>
<P>it is then drawn-</P>
<P>draw = ImageDraw.Draw(im)</P>
<P>draw.rectangle([0,0,width,height], fill=(250,250,250)) etc etc etc</P>
<P>after it is ready to be sent out I "save" it -</P>
<P>pic = cStringIO.StringIO()<BR>im.save(pic, 'GIF')</P>
<P>and send it</P>
<P>&nbsp;pic.seek(0)<BR>&nbsp;RESPONSE.setHeader("Content-type", "image/gif")<BR>&nbsp;RESPONSE.write(pic.read())</P>
<P>&nbsp;</P>
<P>my index_html</P>
<P>&lt;dtml-var standard_html_header&gt;<BR>&lt;IMG src="./dynamicImage?RESPONSE=RESPONSE"&gt;<BR>&lt;dtml-var standard_html_footer&gt;</P>
<P>&nbsp;</P>
<P>the product class inherits Item, Persistent and Implicit</P>
<P>the dynamicImage&nbsp;method has an argument RESPONSE</P>
<P>When I click on view all I get is an image placeholder box (true as well when using the same image tag in a dtml method in the root folder), however from a dtml method in the root folder &lt;dtml-var expr="TestObject.dynamicImage(RESPONSE)"&gt; will render an image as the only content. any other content in the method is ignored.<BR></P>
<P>This is my first attempt at a product, so after much hair pulling I must get it to work.</P>
<P>Thank you in advance for any help</P>
<P>Sean K</P><p><br><hr size=1>Do you Yahoo!?<br>
<a href="http://rd.yahoo.com/hosting/mailsig/*http://webhosting.yahoo.com">Yahoo! Web Hosting</a> - Let the expert host your site
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