old_contents: from typing import Any, Dict, Optional, Text
  
  from django.http import HttpRequest, HttpResponse
  from django.utils.translation import ugettext as _
  
  from zerver.decorator import api_key_only_webhook_view
  from zerver.lib.actions import check_send_stream_message
  from zerver.lib.request import REQ, has_request_variables
  from zerver.lib.response import json_error, json_success
  from zerver.models import UserProfile
  
  BODY_TEMPLATE = '[{website_name}]({website_url}) has {user_num} visitors online.'
  
  @api_key_only_webhook_view('GoSquared')
  @has_request_variables
  def api_gosquared_webhook(request, user_profile,
                            payload=REQ(argument_type='body'),
                            stream=REQ(default='gosquared'),
                            topic=REQ(default=None)):
      # type: (HttpRequest, UserProfile, Dict[str, Dict[str, Any]], Text, Text) -> HttpResponse
      domain_name = payload['siteDetails']['domain']
      user_num = payload['concurrents']
      user_acc = payload['siteDetails']['acct']
      acc_url = 'https://www.gosquared.com/now/' + user_acc
      body = BODY_TEMPLATE.format(website_name=domain_name, website_url=acc_url, user_num=user_num)
      # allows for customisable topics
      if topic is None:
          topic = 'GoSquared - {website_name}'.format(website_name=domain_name)
  
      check_send_stream_message(user_profile, request.client, stream,
                                topic, body)
      return json_success()
  
new_contents: from typing import Any, Dict, Optional, Text
  
  from django.http import HttpRequest, HttpResponse
  from django.utils.translation import ugettext as _
  
  from zerver.decorator import api_key_only_webhook_view
  from zerver.lib.actions import check_send_stream_message
  from zerver.lib.request import REQ, has_request_variables
  from zerver.lib.response import json_error, json_success
  from zerver.models import UserProfile
  
  BODY_TEMPLATE = '[{website_name}]({website_url}) has {user_num} visitors online.'
  
  @api_key_only_webhook_view('GoSquared')
  @has_request_variables
  def api_gosquared_webhook(request: HttpRequest, user_profile: UserProfile,
                            payload: Dict[str, Dict[str, Any]]=REQ(argument_type='body'),
                            stream: Text=REQ(default='gosquared'),
                            topic: Text=REQ(default=None)) -> HttpResponse:
      domain_name = payload['siteDetails']['domain']
      user_num = payload['concurrents']
      user_acc = payload['siteDetails']['acct']
      acc_url = 'https://www.gosquared.com/now/' + user_acc
      body = BODY_TEMPLATE.format(website_name=domain_name, website_url=acc_url, user_num=user_num)
      # allows for customisable topics
      if topic is None:
          topic = 'GoSquared - {website_name}'.format(website_name=domain_name)
  
      check_send_stream_message(user_profile, request.client, stream,
                                topic, body)
      return json_success()
  
subject: Use Python 3 type syntax in zerver/webhooks/gosquared/view.py.