gistfile1.py

def validate_urls(self, urls):
  messages = []
  for url in urls:
    try:
      request = urllib2.Request(url, headers={ "User-Agent" : "Sublime URL Checker" }) 
      response = urllib2.urlopen(request, timeout=3)
      message = '"%s" is a valid URL.' % url
    except Exception as (e):
      message = '"%s" is an invalid URL.' % url
    
    messages.append(message)
    return messages