Created
July 21, 2012 06:45
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Tornado count online number
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| #!/usr/bin/env python | |
| # -*- coding:utf8 -*- | |
| import os | |
| import tornado.web | |
| from tornado.httpserver import HTTPServer | |
| from tornado.ioloop import IOLoop | |
| import uuid | |
| class MainHandler(tornado.web.RequestHandler): | |
| def get(self): | |
| self.render('index.html', name=uuid.uuid4()) | |
| class CountHandler(tornado.web.RequestHandler): | |
| users = set() | |
| def get(self): | |
| """ | |
| user offline | |
| """ | |
| user = self.get_argument('name') | |
| CountHandler.users.remove(user) | |
| self._on_finish() | |
| def post(self): | |
| """ | |
| user online | |
| """ | |
| self.user = user = self.get_argument('name') | |
| CountHandler.users.add(user) | |
| self._on_finish() | |
| def _on_finish(self): | |
| if self.request.connection.stream.closed(): | |
| return | |
| print len(CountHandler.users) | |
| self.finish(u'当前在线人数' + str(len(CountHandler.users))) | |
| def main(): | |
| settings = { | |
| 'template_path': os.path.join(os.path.dirname(__file__), 'templates'), | |
| 'static_path': os.path.join(os.path.dirname(__file__), 'static'), | |
| 'debug': True, | |
| } | |
| app = tornado.web.Application([ | |
| (r'/', MainHandler), | |
| ('/count', CountHandler), | |
| ], **settings) | |
| server = HTTPServer(app) | |
| server.listen(8000) | |
| IOLoop.instance().start() | |
| if __name__ == '__main__': | |
| main() |
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| <!DOCTYPE HTML> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <title>Online Number Demo</title> | |
| </head> | |
| <body> | |
| <span class="count"></span> | |
| <script src="{{ static_url('jquery.js') }}" type="text/javascript"></script> | |
| <script type="text/javascript"> | |
| (function test(){ | |
| window.setTimeout(function(){ | |
| $.ajax({ | |
| url: '/count', | |
| type: 'POST', | |
| data: { name: '{{ name }}' }, | |
| success: function(data){ | |
| $('.count').html(data); | |
| } | |
| }); | |
| test(); | |
| }, 5000); | |
| })(); | |
| $(window).unload(function(){ | |
| $.ajax({ | |
| async: false, | |
| url: '/count?name={{ name }}', | |
| type: 'GET', | |
| success: function(){ | |
| } | |
| }); | |
| }); | |
| </script> | |
| </body> | |
| </html> |
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