URL and Mail

from google.appengine.api import urlfetch

url = ""
result = urlfetch.fetch(url)
if result.status_code == 200:
  doSomethingWithResult(result.content)

from google.appengine.api import mail

class ConfirmUserSignup(webapp.RequestHandler):
  def post(self):
    user_address = self.request.get("email_address")

    if not mail.is_email_valid(address):
      # prompt user to enter a valid address

    else:
      confirmation_url = createNewUserConfirmation(self.request)
      sender_address = "support@example.com"
      subject = "Confirm your registration"
      body = """
Thank you for creating an account!  Please confirm your email address by
clicking on the link below:

%s
""" % confirmation_url

      mail.send_mail(sender_address, user_address, subject, body)