HTTP/1.0 401 Unauthorized
Cache-Control: public
Access-Control-Allow-Origin: *
Vary: Authorization
WWW-Authenticate: Digest realm="iri.columbia.edu", qop="auth", nonce="04aeee1dbced31bd0015028344b58a72", opaque="5ccc069c403ebaf9f0171e9517f40e41"
Content-Type: text/html
401 Unauthorized
User/password is required.