flask.py 文件源码

def __init__(self, app, environ):
        self.app = app
        self.url_adapter = app.url_map.bind_to_environ(environ)
        self.request = app.request_class(environ)

        # ??(session) ??:
        self.session = app.open_session(self.request)  # ????:  session: ?????? session ??
        if self.session is None:
            self.session = _NullSession()

        # g ??:
        self.g = _RequestGlobals()  # g: ?????? g ??
        self.flashes = None

        try:
            self.request.endpoint, self.request.view_args = \
                self.url_adapter.match()
        except HTTPException, e:
            self.request.routing_exception = e

    #
    # ??:
    #   - ?? ?????
    #   - ? ??????, ?? --> ??????? g, session
    #