app/soc/logic/validate.py
author Pawel Solyga <Pawel.Solyga@gmail.com>
Tue, 20 Jan 2009 21:00:55 +0000
changeset 848 07fd6a603c24
parent 533 ba3309b2fd30
child 1307 091a21cf3627
permissions -rw-r--r--
Disable R0801 messages in pylintrc. R0801 messages indicates that a set of similar lines has been detected among multiple file. This usually means that the code should be refactored to avoid this duplication but in our case it's useless since it shows a lot of imports code or authors. Patch by: Pawel Solyga Review by: to-be-reviewed

#!/usr/bin/python2.5
#
# Copyright 2008 the Melange authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

"""Common validation helper functions.
"""

__authors__ = [
  '"Lennard de Rijk" <ljvderijk@gmail.com>',
  '"Pawel Solyga" <pawel.solyga@gmail.com>',
  ]


import feedparser

from google.appengine.api import urlfetch

from soc.models import linkable


def isFeedURLValid(feed_url=None):
  """Returns True if provided url is valid ATOM or RSS.

  Args:
    feed_url: ATOM or RSS feed url
  """
  if feed_url:
    result = urlfetch.fetch(feed_url)
    if result.status_code == 200:
      parsed_feed = feedparser.parse(result.content)
      if parsed_feed.version and (parsed_feed.version != ''):
        return True
  return False


def isLinkIdFormatValid(link_id):
  """Returns True if link_id is in a valid format.

  Args:
    link_id: link ID used in URLs for identification
  """
  if linkable.LINK_ID_REGEX.match(link_id):
    return True
  return False


def isScopePathFormatValid(scope_path):
  """Returns True if scope_path is in a valid format.
  
  Args:
    scope_path: scope path prepended to link ID
      used for identification.
  """
   
  if linkable.SCOPE_PATH_REGEX.match(scope_path):
    return True
  
  return False