华为对象存储 --生成Query鉴权签名

生成Query鉴权签名：

1. 计算StringToSign:
					
StringToSign = HTTP-Verb + "\n" + 
Content-MD5 + "\n" + 
Content-Type + "\n" + 
Expires + "\n" + 
CanonicalizedHeaders + 
CanonicalizedResource

2. 计算Signature:
					
Signature = 
UrlEncode(Base64(Hmac-sha1(SK, StringToSign)))

3. 计算Url
Url = Endpoint + "?" + "AccessKeyId=" + AK + 
"&Expires=" + Expires + "&Signature=" + Signature

Endpoint

HTTP-Verb

Content-MD5

Content-Type

Expires

Canonicalized Headers

Canonicalized Resource