(w3.info)HTTP/1.0 Support

HTTP/1.0 Support
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   The new revision of the HTTP specification adds much more
functionality to the server side of a transaction.  Access
authorization (via username and password combinations) has been added,
and several types of redirection can occur.  All of this negotiation
and redirection should take place before the user ever sees the first
requested page - this will avoid the overhead of parsing any error
messages or old documents the server may have returned with the
redirection or authorization message.  The new protocol is also MIME
(Multimedia Internet Mail Extensions, see RFC 1341) compliant.

Redirection

Authentication

Accessing restricted servers and documents

Payment

How to pay for services over the World Wide Web

MIME Support

How W3 uses MIME types, and how to modify its behavior.