old_contents: '''
  searx is free software: you can redistribute it and/or modify
  it under the terms of the GNU Affero General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.
  
  searx 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 Affero General Public License for more details.
  
  You should have received a copy of the GNU Affero General Public License
  along with searx. If not, see < http://www.gnu.org/licenses/ >.
  
  (C) 2015 by Adam Tauber, <asciimoo@gmail.com>
  '''
  
  from flask_babel import gettext
  import re
  from urllib.parse import urlunparse, parse_qsl, urlencode
  
  regexes = {re.compile(r'utm_[^&]+'),
             re.compile(r'(wkey|wemail)[^&]*'),
             re.compile(r'&$')}
  
  name = gettext('Tracker URL remover')
  description = gettext('Remove trackers arguments from the returned URL')
  default_on = True
  preference_section = 'privacy'
  
  
  def on_result(request, search, result):
      if 'parsed_url' not in result:
          return True
  
      query = result['parsed_url'].query
  
      if query == "":
          return True
      parsed_query = parse_qsl(query)
  
      changes = 0
      for i, (param_name, _) in enumerate(list(parsed_query)):
          for reg in regexes:
              if reg.match(param_name):
                  parsed_query.pop(i - changes)
                  changes += 1
                  result['parsed_url'] = result['parsed_url']._replace(query=urlencode(parsed_query))
                  result['url'] = urlunparse(result['parsed_url'])
                  break
  
      return True
  
new_contents: '''
  searx is free software: you can redistribute it and/or modify
  it under the terms of the GNU Affero General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.
  
  searx 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 Affero General Public License for more details.
  
  You should have received a copy of the GNU Affero General Public License
  along with searx. If not, see < http://www.gnu.org/licenses/ >.
  
  (C) 2015 by Adam Tauber, <asciimoo@gmail.com>
  '''
  
  from flask_babel import gettext
  import re
  from urllib.parse import urlunparse, parse_qsl, urlencode
  
  regexes = {re.compile(r'utm_[^&]+'),
             re.compile(r'(wkey|wemail)[^&]*'),
             re.compile(r'(_hsenc|_hsmi|hsCtaTracking|__hssc|__hstc|__hsfp)[^&]*'),
             re.compile(r'&$')}
  
  name = gettext('Tracker URL remover')
  description = gettext('Remove trackers arguments from the returned URL')
  default_on = True
  preference_section = 'privacy'
  
  
  def on_result(request, search, result):
      if 'parsed_url' not in result:
          return True
  
      query = result['parsed_url'].query
  
      if query == "":
          return True
      parsed_query = parse_qsl(query)
  
      changes = 0
      for i, (param_name, _) in enumerate(list(parsed_query)):
          for reg in regexes:
              if reg.match(param_name):
                  parsed_query.pop(i - changes)
                  changes += 1
                  result['parsed_url'] = result['parsed_url']._replace(query=urlencode(parsed_query))
                  result['url'] = urlunparse(result['parsed_url'])
                  break
  
      return True
  
subject: Remove hubsbpot tracking URL params