pywsgi.py 文件源码

def update_environ(self):
        """
        Called before the first request is handled to fill in WSGI environment values.

        This includes getting the correct server name and port.
        """
        address = self.address
        if isinstance(address, tuple):
            if 'SERVER_NAME' not in self.environ:
                try:
                    name = socket.getfqdn(address[0])
                except socket.error:
                    name = str(address[0])
                if PY3 and not isinstance(name, str):
                    name = name.decode('ascii')
                self.environ['SERVER_NAME'] = name
            self.environ.setdefault('SERVER_PORT', str(address[1]))
        else:
            self.environ.setdefault('SERVER_NAME', '')
            self.environ.setdefault('SERVER_PORT', '')