Re: [Zope] Set MIME type using ZPT
srikanth wrote:
Hi,
I tried this one. But the html page takes the parameter as a string
but doenst
Execute the pyhton function. I got all the functions (External methods)
all set.
The img tag I used is:
span tal:define=imagename result/filenameImg
src=loadImage?filename=imagename/span
Have a look at the generated html source. You have not said wither the
probem is a mal-formed image tag, or the image tag failing to fetch the
image.
Also, pay attention to Tino's comments on seurity. I only ever use a
Serial Number, not Filename - that comes from a database.
Don't forget that image tags should have width, height and alt attributes.
Cliff
Because I am getting the filename from the resultset.
Once again thanks for all your time and patience.
Any help would be gr8.
Ta.
Srikanth.
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of
Cliff Ford
Sent: Monday, April 04, 2005 11:15 PM
Cc: zope@zope.org
Subject: Re: [Zope] Set MIME type using ZPT
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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Re: [Zope] Set MIME type using ZPT
srikanth wrote at 2005-4-5 13:11 -0700: 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). Apparently, you do not yet fully understand HTML and ZPT. HTML (and therefore ZPT) is *NOT* intended to present binary data (such as images). I expect you do not understand MIMEImage as well. I do not know what it is for but almost surely, it is not for presentation via HTTP... If its dtml I could have used dtml-mime tag is there any equivalent to that in ZPT. And it would not work. dtml-mime is for construction of an email message from DTML and not for a webpage presentation. Step back. Read a good book about Web publishing, HTML and HTTP. Learn about how to present binary information in web pages (i.e. via HTTP) -- you will need the Content-Type header of HTTP responses. Read about Zope's REQUEST and RESPONSE objects (in the Zope book or http://www.dieter.handshake.de/pyprojects/zope/book/chap3.html) You will *not* need a ZPT (nor DTML) for presentation of binary content. You use then only for textual content. -- Dieter ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] Set MIME type using ZPT
Am Dienstag, den 05.04.2005, 13:11 -0700 schrieb srikanth: 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. This is not a domain for templating languages like DTML or ZPT. Images are read seperately by the client (get a sniffer like shanes tcpwatch or tcpflow and see whats going on there) So your external method has to set the headers. Unfortunalely you open a huge security hole with your solution and by not reading the python documentation carefully ;) fname = '/mnt/'+filename; --- if I put a filename like ../etc/passwd I start to have fun. Ah, and image data for web pages are raw. So you dont need mimeimage alltogether. Just open().read() Again, if you want performance, you should use: from ZPublisher.Iterators import filestream_iterator return filestream_iterator(filenameondisk,'rb') Regards Tino ___ Zope maillist - Zope@zope.org http://mail.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope-dev )
