想签名以下信息：
PUT /quotes/nelson HTTP/1.0
Content-Md5: c8fdb181845a4ca6b8fec737b3581d76
Content-Type: text/html
Date: Thu, 17 Nov 2005 18:49:58 GMT
X-OSS-Meta-Author: foo@bar.com
X-OSS-Magic: abracadabra
假如AccessID是： "44CF9590006BF252F707"
AccessKey 是 "OtxrzxIsfpFjA7SwPzILwy8Bw21TLhquhboDYROV"，可用以下
方法签名
签名计算结果应该为”63mwfl zYIOG6k95yxbgMruQ6QI=”