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14.8 Authorization Connected: An Internet Encyclopedia
14.8 Authorization

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14.8 Authorization

14.8 Authorization

A user agent that wishes to authenticate itself with a server-- usually, but not necessarily, after receiving a 401 response--MAY do so by including an Authorization request-header field with the request. The Authorization field value consists of credentials containing the authentication information of the user agent for the realm of the resource being requested.

          Authorization  = "Authorization" ":" credentials

HTTP access authentication is described in section 11. If a request is authenticated and a realm specified, the same credentials SHOULD be valid for all other requests within this realm.

When a shared cache (see section 13.7) receives a request containing an Authorization field, it MUST NOT return the corresponding response as a reply to any other request, unless one of the following specific exceptions holds:

  1. If the response includes the "proxy-revalidate" Cache-Control directive, the cache MAY use that response in replying to a subsequent request, but a proxy cache MUST first revalidate it with the origin server, using the request-headers from the new request to allow the origin server to authenticate the new request.

  2. If the response includes the "must-revalidate" Cache-Control directive, the cache MAY use that response in replying to a subsequent request, but all caches MUST first revalidate it with the origin server, using the request-headers from the new request to allow the origin server to authenticate the new request.

  3. If the response includes the "public" Cache-Control directive, it may be returned in reply to any subsequent request.


Next: 14.9 Cache-Control

Connected: An Internet Encyclopedia
14.8 Authorization

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