server.py 文件源码

def add_handler(self, pattern, handler, **kwargs):
        """
        Adds the given *handler* (`tornado.web.RequestHandler`) to the Tornado
        Application (`self.ws.application`) to handle URLs matching *pattern*.
        If given, *kwargs* will be added to the `tornado.web.URLSpec` when the
        complete handler is assembled.

        .. note::

            If the *pattern* does not start with the configured `url_prefix` it
            will be automatically prepended.
        """
        logging.debug("Adding handler: (%s, %s)" % (pattern, handler))
        url_prefix = self.ws.settings['url_prefix']
        if not pattern.startswith(url_prefix):
            if pattern.startswith('/'):
                # Get rid of the / (it will be in the url_prefix)
                pattern = pattern.lstrip('/')
        spec = tornado.web.URLSpec(pattern, handler, kwargs)
        # Why the Tornado devs didn't give us a simple way to do this is beyond
        # me.
        self.ws.application.handlers[0][1].append(spec)