在 Odoo 中使用 WebSocket 并兼容Odoo的Session会话识别

```
from geventwebsocket import WebSocketApplication

from ..http import OpenERPSession
import odoo
from odoo.tools.func import lazy_property

class WsApplication(WebSocketApplication):

def get_cookie(self, key):
        raw = self.ws.environ['HTTP_COOKIE']
        if raw:
            _dict = dict([ e.strip().split('=',1) for e in raw.split(';')])
            return _dict.get(key,None)
        else:
            return None

@lazy_property
    def session_store(self):
        # Setup http sessions
        path = odoo.tools.config.session_dir
        _logger.debug('HTTP sessions stored in: %s', path)
        return werkzeug.contrib.sessions.FilesystemSessionStore(path, session_class=OpenERPSession)

def setup_session(self):
        sid =self.get_cookie('session_id')
        if sid is None:
            session = None
        else:
            session = self.session_store.get(sid)
        self.session = session
        return session

def get_current_user(self):
        pass

def on_open(self):
        session = self.setup_session()

def on_message(self, message):
        pass

def on_close(self, reason):
        pass

class WsServer(WebSocketServer):

debug_log_format = (
        '%(levelname)s in %(module)s: ' +
        '%(message)s'
    )

def run():
    WsServer(
            (config.main_server_conf['host'], config.main_server_conf['port']),
            Resource([
                #('/', application), # UI app
                ('/ws', WsApplication)# WebSocket app
            ]),
            debug=True
    ).serve_forever()
```

融合odoo的服务运行
```
#!/usr/bin/env python
__import__('pkg_resources').declare_namespace('odoo.addons')
import odoo
from odoo.service import server

class WebSocketServer(object):
    pass

# WebSocketServer(odoo.service.wsgi_server.application)
service.GeventServer = WebSocketServer

if __name__ == "__main__":
    odoo.cli.main()
```

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