Changeset 875 for draft-ietf-httpbis/latest/p7-auth.html
- Timestamp:
- 23/07/10 05:43:59 (12 years ago)
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draft-ietf-httpbis/latest/p7-auth.html
r865 r875 620 620 <p id="rfc.section.2.1.p.1">The request requires user authentication. The response <em class="bcp14">MUST</em> include a WWW-Authenticate header field (<a href="#header.www-authenticate" id="rfc.xref.header.www-authenticate.1" title="WWW-Authenticate">Section 3.4</a>) containing a challenge applicable to the requested resource. The client <em class="bcp14">MAY</em> repeat the request with a suitable Authorization header field (<a href="#header.authorization" id="rfc.xref.header.authorization.1" title="Authorization">Section 3.1</a>). If the request already included Authorization credentials, then the 401 response indicates that authorization has been 621 621 refused for those credentials. If the 401 response contains the same challenge as the prior response, and the user agent has 622 already attempted authentication at least once, then the user <em class="bcp14">SHOULD</em> be presented the entity that was given in the response, since that entity might include relevant diagnostic information. HTTP623 access authentication is explained in "HTTP Authentication: Basic and Digest Access Authentication" <a href="#RFC2617" id="rfc.xref.RFC2617.5"><cite title="HTTP Authentication: Basic and Digest Access Authentication">[RFC2617]</cite></a>.622 already attempted authentication at least once, then the user <em class="bcp14">SHOULD</em> be presented the representation that was given in the response, since that representation might include relevant diagnostic 623 information. HTTP access authentication is explained in "HTTP Authentication: Basic and Digest Access Authentication" <a href="#RFC2617" id="rfc.xref.RFC2617.5"><cite title="HTTP Authentication: Basic and Digest Access Authentication">[RFC2617]</cite></a>. 624 624 </p> 625 625 <div id="rfc.iref.3"></div>
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