def __init__(self, status, message, headers=None, content=b''):
super().__init__(message)
self.status = ASSERT.in_range(_cast_status(status), (300, 600))
self.headers = ASSERT.predicate(
dict(headers) if headers is not None else {},
lambda hdrs: all(
isinstance(k, str) and isinstance(v, str)
for k, v in hdrs.items()),
)
self.content = ASSERT.isinstance(content, bytes)
def redirect(cls, status, message, location):
ASSERT.in_range(status, (300, 400))
return cls(status, message, {consts.HEADER_LOCATION: location})