src/main/java/com/qingstor/sdk/utils/QSServerSignatureUtil.java
public static String generateAuthorization(
            String accessKey,
            String secretKey,
            String strToSign) {
        return QSSignatureUtil.generateAuthorization(accessKey, secretKey, strToSign);
    }
public static String generateAuthorization(
            String accessKey,
            String secretKey,
            String strToSign) {
        return QSSignatureUtil.generateAuthorization(accessKey, secretKey, strToSign);
    }
Generate signature for request against QingStor.

@param accessKey: API access key ID
@param secretKey: API secret access key ID
@param strToSign: strToSign
@return a string which can be used as value of HTTP request header field "Authorization"
directly.
<p>See https://docs.qingcloud.com/qingstor/api/common/signature.html for more details
about how to do signature of request against QingStor.