+
−#!/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__ = [
+
−  '"Pawel Solyga" <pawel.solyga@gmail.com>',
+
−  ]
+
−
+
−
+
−import re
+
−
+
−from google.appengine.api import urlfetch
+
−
+
−import feedparser
+
−
+
−from soc.logic import path_linkname
+
−
+
−
+
−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 isLinkNameFormatValid(link_name):
+
−  """Returns True if link_name is in a valid format.
+
−
+
−  Args:
+
−    link_name: link name used in URLs for identification
+
−  """
+
−  if path_linkname.LINKNAME_REGEX.match(link_name):
+
−    return True
+
−  return False