WWW Headers Sent
|If-Modified-Since||Tue, 06 Dec 2022 15:08:53 GMT|
Web Headers definition
HTTP headers are a method for client and the server to share additional information that will help with web request.
Typically proprietary headers start with the X- prefix. However this convention was deprecated in June 2012 because of the inconveniences it caused when nonstandard fields became standard in RFC 6648; others are listed in an IANA registry, whose original content was defined in RFC 4229. IANA also maintains a registry of proposed new HTTP headers.
An HTTP header consists of its case-insensitive name followed by a colon (:), then by its value. Whitespace before the value is ignored.