/// <summary>
/// 构建Authorization头信息
/// </summary>
/// <param name="builder">请求参数封装信息</param>
/// <param name="signature">签名信息</param>
/// <param name="credentials">证书信息</param>
/// <param name="signerParams">签名参数信息</param>
/// <returns>http头 Authorization 信息字符串</returns>
private string BuildAuthorizationHeader(SdkHttpFullRequestBuilder builder, byte[] signature, ICredentials credentials,
SignerRequestParams signerParams)
{
string signingCredentials = credentials.AccessKeyId() + "/" + signerParams.Scope;
string credential = "Credential=" + signingCredentials;
string signerHeaders = "SignedHeaders=" + GetSignedHeadersString(builder);
string signatureHeader = "Signature=" + StringUtils.ByteToHex(signature, true);
return(new StringBuilder().Append(ParameterConstant.JDCLOUD2_SIGNING_ALGORITHM)
.Append(" ")
.Append(credential)
.Append(", ")
.Append(signerHeaders)
.Append(", ")
.Append(signatureHeader)
.ToString());
}