- the
date header is used to specify the date and time at which the message was sent.
- it is always in the format
%Y-%m-%dT%H:%M:%SZ%z.
- it should be in UTC time.
- e.g.
2019-01-01T00:00:00Z+0000
- the
language header is used to specify the language of the message body.
- it is in the format ISO 639-1 language code, followed by a hyphen, and then a valid ISO 3166 Alpha 2 country code.
- e.g.
en-US, fr-CA
- the
set-cookies header is used to specify the cookies that should be set on the client.
- it is an object, where the keys are the names of the cookies, and the values are the cookies themselves.
- e.g.
{"cookie1": "value1", "cookie2": "value2"}
- if they are in an invalid format, the server will respond with a
400 Bad Request status code.