[1] RFC 6249 - Metalink/HTTP: Mirrors and Hashes ( (6/17/2011, 5:59:58 PM 版)) <http://tools.ietf.org/html/rfc6249#section-6>
[2] RFC 6249 - Metalink/HTTP: Mirrors and Hashes ( (9/7/2014, 1:47:12 PM 版)) <http://tools.ietf.org/html/rfc6249#section-6>
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