glogging.py 文件源码

def _get_user(self, environ):
        user = None
        http_auth = environ.get("HTTP_AUTHORIZATION")
        if http_auth and http_auth.startswith('Basic'):
            auth = http_auth.split(" ", 1)
            if len(auth) == 2:
                try:
                    # b64decode doesn't accept unicode in Python < 3.3
                    # so we need to convert it to a byte string
                    auth = base64.b64decode(auth[1].strip().encode('utf-8'))
                    if PY3:  # b64decode returns a byte string in Python 3
                        auth = auth.decode('utf-8')
                    auth = auth.split(":", 1)
                except TypeError as exc:
                    self.debug("Couldn't get username: %s", exc)
                    return user
                except binascii.Error as exc:
                    self.debug("Couldn't get username: %s", exc)
                    return user
                if len(auth) == 2:
                    user = auth[0]
        return user