lint.py 文件源码

def check_start_response(self, status, headers, exc_info):
        check_string('status', status)
        status_code = status.split(None, 1)[0]
        if len(status_code) != 3 or not status_code.isdigit():
            warn(WSGIWarning('Status code must be three digits'), stacklevel=3)
        if len(status) < 4 or status[3] != ' ':
            warn(WSGIWarning('Invalid value for status %r.  Valid '
                             'status strings are three digits, a space '
                             'and a status explanation'), stacklevel=3)
        status_code = int(status_code)
        if status_code < 100:
            warn(WSGIWarning('status code < 100 detected'), stacklevel=3)

        if type(headers) is not list:
            warn(WSGIWarning('header list is not a list'), stacklevel=3)
        for item in headers:
            if type(item) is not tuple or len(item) != 2:
                warn(WSGIWarning('Headers must tuple 2-item tuples'),
                     stacklevel=3)
            name, value = item
            if type(name) is not str or type(value) is not str:
                warn(WSGIWarning('header items must be strings'),
                     stacklevel=3)
            if name.lower() == 'status':
                warn(WSGIWarning('The status header is not supported due to '
                                 'conflicts with the CGI spec.'),
                     stacklevel=3)

        if exc_info is not None and not isinstance(exc_info, tuple):
            warn(WSGIWarning('invalid value for exc_info'), stacklevel=3)

        headers = Headers(headers)
        self.check_headers(headers)

        return status_code, headers