[Zope] Extracting just the string of the zope file or dtml object

[Dieter Maurer]

Andy Bulka writes:
 > How do I ensure that the string *contents* of my Zope object is passed to an
 > external method, rather than passing the zope object itself?
 > 
 > E.g. if
 >   mydtmldoc  is a DTML document with plain text inside it
 >   myFile     is a file object with content-type plain text
 > then when I call
 > 
 > <dtml-call "ProcessAstring1('a literal string')">
 > <dtml-call "ProcessAstring1(mydtmldoc)">
 > <dtml-call "ProcessAstring1(myFile)">
The easiest way is to work in your external method
and let DTML pass what it likes:

  def extMethod(string_or_object):
    s= string_or_object
    if hasattr(s,'read'): s= s.read() # now "s" is a string

In DTML, it is much more difficult, as "read" is private
for DTML objects. However,  "PrincipiaSearchSource" is
an accessible synonym for the "read" of DTML objects.

I did not check the permissions of "OFS.File.read".
You can use my DocFinder product

  <http://www.dieter.handshake.de/pyprojects/zope/DocFinder.html>

to find out about it.



Dieter