Issue 2234 - Add a WSGI controller to collect email addresses for the Adblock Browser iOS launch

sitescripts/submitEmail/web/submitEmail.py

Index: sitescripts/submitEmail/web/submitEmail.py
===================================================================
new file mode 100644
--- /dev/null
+++ b/sitescripts/submitEmail/web/submitEmail.py
@@ -0,0 +1,129 @@
+# coding: utf-8
+
+# This file is part of the Adblock Plus web scripts,
+# Copyright (C) 2006-2015 Eyeo GmbH
+#
+# Adblock Plus is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# Adblock Plus is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
+
+import os
+import errno
+import fcntl
+import random
+import string
+import wsgiref.util
+from urlparse import parse_qsl, urljoin
+from urllib import urlencode
+
+from sitescripts.utils import get_config, sendMail
+from sitescripts.web import url_handler, form_handler
+
+VERIFICATION_PATH = '/verifyEmail'
+VERIFICATION_CODE_PARAM = 'code'
+
+def generate_verification_code():
+  return ''.join(random.sample(string.letters + string.digits, 32))
+
+def get_filename_for_verification_code(config, verification_code):
+  directory = config.get('submitEmail', 'pendingVerficationsDirectory')
+  return os.path.join(directory, verification_code)
+
+def create_file_for_verification_code(config):
+  flags = os.O_CREAT | os.O_EXCL | os.O_WRONLY | getattr(os, 'O_BINARY', 0)
+
+  while True:
+    verification_code = generate_verification_code()
+    filename = get_filename_for_verification_code(config, verification_code)
+
+    try:
+      return (os.open(filename, flags), verification_code)
+    except OSError as e:
+      if e.errno != errno.EEXIST:
+        raise
+
+def verify_email_address(config, verification_code):
+  if verification_code in ('', os.path.curdir, os.path.pardir):
+    return False
+  if os.path.sep in verification_code:
+    return False
+
+  verification_filename = get_filename_for_verification_code(config, verification_code)
+  try:
+    file = open(verification_filename, 'rb')
+  except IOError as e:
+    if e.errno == errno.ENOENT:
+      return False
+    raise
+
+  with file:
+    email = file.read()
+
+  verified_filename = config.get('submitEmail', 'verifiedEmailAddressesFile')
+  with open(verified_filename, 'ab', 0) as file:
+    fcntl.lockf(file, fcntl.LOCK_EX)
+    try:
+      file.write(email)
+      file.write('\n')
+    finally:
+      fcntl.lockf(file, fcntl.LOCK_UN)
+
+  try:
+    os.unlink(verification_filename)
+  except OSError as e:
+    if e.errno != errno.ENOENT:
+      raise
+
+  return True
+
+@url_handler('/submitEmail')
+@form_handler
+def submitEmail(environ, start_response, data):
+  email = data.get('email', '').strip()
+  if not email:
+    start_response('400 Bad Request', [('Content-Type', 'text/plain')])
+    return ['No email address given.']
+
+  config = get_config()
+  fd, verification_code = create_file_for_verification_code(config)
+  try:
+    os.write(fd, email.encode('utf-8'))
+  finally:
+    os.close(fd)
+
+  sendMail(
+    config.get('submitEmail', 'verificationEmailTemplate'),
+    {
+      'recipient': email,
+      'verification_url': '%s?%s' % (
+        urljoin(wsgiref.util.application_uri(environ), VERIFICATION_PATH),
+        urlencode([(VERIFICATION_CODE_PARAM, verification_code)])
+      )
+    }
+  )
+
+  start_response('200 OK', [('Content-Type', 'text/plain')])
+  return ["Thanks for your submission! You'll receive a verification email shortly."]
+
+@url_handler(VERIFICATION_PATH)
+def verifyEmail(environ, start_response):
+  config = get_config()
+
+  params = dict(parse_qsl(environ.get('QUERY_STRING', '')))
+  verification_code = params.get(VERIFICATION_CODE_PARAM, '')
+
+  if verify_email_address(config, verification_code):
+    option = 'successfulVerificationRedirectLocation'
+  else:
+    option = 'unknownVerificationCodeRedirectLocation'
+
+  start_response('303 See other', [('Location', config.get('submitEmail', option))])
+  return []