lint.py 文件源码

def check_headers(self, headers):
        etag = headers.get('etag')
        if etag is not None:
            if etag.startswith(('W/', 'w/')):
                if etag.startswith('w/'):
                    warn(HTTPWarning('weak etag indicator should be upcase.'),
                         stacklevel=4)
                etag = etag[2:]
            if not (etag[:1] == etag[-1:] == '"'):
                warn(HTTPWarning('unquoted etag emitted.'), stacklevel=4)

        location = headers.get('location')
        if location is not None:
            if not urlparse(location).netloc:
                warn(HTTPWarning('absolute URLs required for location header'),
                     stacklevel=4)