I've been trying to write my own validators using the
formencode.FancyValidator class. What I am trying to accomplish is to
validate some input as well as modify the input by stripping html
tags. I'm not sure if formencode was designed to accomplish both of
these tasks.
Here is a simple example:
import formencode, HTMLParser
from formencode import validators
from HTMLParser import HTMLParser
class StripTags(formencode.FancyValidator):
def _to_python(self, value, state):
result = []
parser = HTMLParser()
parser.handle_data = result.append
parser.feed(value)
parser.close()
return ''.join(result)
class CommentForm(formencode.Schema):
name = formencode.All(StripTags(), validators.NotEmpty())
comment = formencode.All(StripTags(), validators.NotEmpty())
So in this example I am trying to validate that the name & comment
fields are not empty, as well as strip any html or script tags. Now I
can raise an exception if any tags are encountered and that works
fine, but I'd rather strip them out.
Am I going about this the wrong way? I'm starting to think that
formencode is only designed for validating input, and not filtering
it.
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