[Zope] Set MIME type using ZPT

[Cliff Ford]

srikanth wrote:
> Hi,
> 
>   I am using an external method to load an Image from the harddrive. The
> external method is as follows:
> 
> from email.MIMEImage import MIMEImage
> ##parameters=filename
> def getDocument(filename):
>       fname = '/mnt/'+filename;
> 	input = open(fname,'r')
> 	content = MIMEImage( input.read( ) )
> 	input.close( )
> 	return content
> 
> 
> When I try to display the content in the webpage what I actually got is
> all raw data of the file rather the image. 
> So how can I convert the raw data to be dispalyed as image in the
> webpage. I am using ZPT to display the web page (image). If its dtml I
> could have used <dtml-mime> tag is there any equivalent to that in ZPT.
> 
> Any suggestion would be a gr8 help.

It is not clear exactly how you are using the Page Template. Typically 
the page would have an img tag that calls a python script that calls the 
External Method. Remember the web browser fetches the image separately 
after the html has been received - so your img tag might look like this:
<img src="getImage?filename=whatever" ...> and your getImage python 
script would look like this:

(type, encoding) = context.getMimeType(context.REQUEST.filename)
context.REQUEST.RESPONSE.setHeader('Content-Type', type)
context.REQUEST.RESPONSE.setHeader('Content-Disposition', 'inline;
return context.getDocumentCall(context.REQUEST.filename)

where getDocumentCall is the name of your External Method that calls the 
getDocument External Method and getMimeType is another External Method 
that looks like this:

import mimetypes
def getMimeType(filename):
     return mimetypes.guess_type(filename)

and your own external method would look like this:

 > ##parameters=filename
 > def getDocument(filename):
 >       fname = '/mnt/'+filename;
 > 	input = open(fname,'r')
 > 	content = input.read( )
 > 	input.close( )
 > 	return content

At the moment you seem to have skipped a step.

HTH

Cliff

> Ta.
> 
> 
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