Issue 2267 - Unify form handling by reusing form_handler() and encode_email_address()

sitescripts/formmail/web/formmail.py

 # 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 re
 import datetime
-from urlparse import parse_qsl
-from sitescripts.utils import get_config, sendMail, setupStderr
-from sitescripts.web import url_handler
+
+from sitescripts.utils import get_config, sendMail, encode_email_address
+from sitescripts.web import url_handler, form_handler, send_simple_response
 
 @url_handler('/formmail')
-def handleRequest(environ, start_response):
-  setupStderr(environ['wsgi.errors'])
+@form_handler
+def handleRequest(environ, start_response, data):
+  params = {name: data.get(name, '').strip() for name in ('name', 'email', 'subject', 'message')}
+  missing = [k for k, v in params.iteritems() if not v]
 
-  start_response('200 OK', [('Content-Type', 'text/plain; charset=utf-8')])
-  if environ['REQUEST_METHOD'].upper() != 'POST' or not environ.get('CONTENT_TYPE', '').startswith('application/x-www-form-urlencoded'):
-    return 'Unsupported request method'
+  if missing:
+    text = 'Missing fields: ' + ', '.join(missing)
+    return send_simple_response(start_response, 400, text)
 
   try:
-    request_body_length = int(environ['CONTENT_LENGTH'])
-  except:
-    return 'Invalid or missing Content-Length header'
-
-  request_body = environ['wsgi.input'].read(request_body_length)
-  params = {}
-  for key, value in parse_qsl(request_body):
-    params[key] = value.decode('utf-8').strip()
-
-  if not 'name' in params or params['name'] == '':
-    return 'No name entered'
-  if not 'email' in params or params['email'] == '':
-    return 'No email address entered'
-  if not 'subject' in params or params['subject'] == '':
-    return 'No subject entered'
-  if not 'message' in params or params['message'] == '':
-    return 'No message entered'
-
-  if not re.match(r'^\w[\w.+!-]+@\w[\w.-]+\.[a-zA-Z]{2,6}$', params['email']):
-    return 'Invalid email address'
+    params['email'] = encode_email_address(params['email'])
+  except ValueError:
+    return send_simple_response(start_response, 400, 'Invalid email address')
 
   params['time'] = datetime.datetime.now()
   sendMail(get_config().get('formmail', 'template'), params)
-  return 'Message sent'
+
+  return send_simple_response(start_response, 200, 'Message sent')