signature static method

String signature({
  1. required String accessKeySecret,
  2. required String method,
  3. String contentMD5 = '',
  4. String contentType = '',
  5. String date = '',
  6. required Map<String, dynamic> headers,
  7. required String resource,
})

签名 accessKeySecret 秘钥 method HTTP请求方法，全大写英文。取值包括GET、POST、PUT和DELETE contentMD5 HTTP请求消息Body的MD5哈希值，转换为十六进制大写英文字符串。若Body为空，此项为空字符串 contentType HTTP请求消息Body的MIME类型，若Body为空，此项为空字符串 date HTTP请求消息头中Date字段的值，当前时间的格式化字符串。格式为RFC822/RFC1123，格式化字符串为%a, %d %b %Y %H:%M:%S GMT，时区为GMT标准时间。 headers header中阿里云专有请求头，按 key升序排序后，以 : 连接键值，以换行符分隔键值对。 resource HTTP请求消息URI，包含请求参数，格式为/bucket/object?param1=value1&param2=value2

Implementation

static String signature({
  required String accessKeySecret,
  required String method,
  String contentMD5 = '',
  String contentType = '',
  String date = '',
  required Map<String, dynamic> headers,
  required String resource,
}) {
  final headerString = _getHeaderString(headers);
  final String singContent = [
    method,
    contentMD5,
    contentType,
    date,
    headerString,
    resource
  ].join("\n");
  return EncryptUtil.hmacSign(accessKeySecret, singContent);
}