分账提交到 https://api.mch.weixin.qq.com/secapi/pay/profitsharing <xml> <mch_id>1459644502</mch_id> <nonce_str>82plnk7c5jdbl8e4f</nonce_str> <sign>017D838C8B6D8429BB381312E609D357AF8F38967DDB9A846244C320C258B918</sign> <sign_type>HMAC-SHA256</sign_type> <appid>wx12017585ce3b4d6b</appid> <transaction_id>4200000733202010173528706762</transaction_id> <out_order_no>B2010170855097102</out_order_no> <receivers>[{"type":"PERSONAL_OPENID","account":"osgIQ5ez0JDepZqjcVWL7qmzjLhY","amount":30,"description":"\u7528\u6237\u5206\u8D26"}]</receivers> </xml>

支付签名一直错误，按照签名步骤校验：第一步 k = v 正确对照，第二步链接商户key也是对的，到第三步生成sign （ HMACSHA256加密）与校验签名工具得出的sign 不对照，不知道哪里出了问题，使用了很多种HMACSHA256加密代码： public static string GetHash(string message, string secret)     { //第一种         secret = secret ?? "";         byte[] keyByte = Encoding.GetEncoding("UTF-8").GetBytes(secret);         byte[] messageBytes = Encoding.GetEncoding("UTF-8").GetBytes(message);         using (var hmacsha256 = new HMACSHA256(keyByte))         {             byte[] hashmessage = hmacsha256.ComputeHash(messageBytes);             string result = BitConverter.ToString(hashmessage);             result = result.Replace("-", "");             return result.ToUpper();         } //第二种         //byte[] clearBytes = Encoding.UTF8.GetBytes(message);         //byte[] keyByte = Encoding.UTF8.GetBytes(secret);         //SHA256 sha256 = new SHA256Managed();         //sha256.ComputeHash(clearBytes);         //byte[] hashedBytes = sha256.Hash;         //sha256.Clear();         //string output = BitConverter.ToString(hashedBytes).Replace("-", "");         //return output.ToUpper(); //第三种         //string result = "";         //var enc = Encoding.Default;         //byte[]         //baText2BHashed = enc.GetBytes(message),         //baSalt = enc.GetBytes(secret);         //System.Security.Cryptography.HMACSHA256 hasher = new HMACSHA256(baSalt);         //byte[] baHashedText = hasher.ComputeHash(baText2BHashed);         //result = string.Join("", baHashedText.ToList().Select(b => b.ToString("x2")).ToArray());         //return result.ToUpper();     } 求各位大神看看，有什么不对的帮我解答一下。

想要在canvas里绘制带有参数的小程序码，但后台返回的是小程序码base64，不是https的地址，怎么能转换成https的地址让drawImage调用

https://developers.weixin.qq.com/miniprogram/dev/api/network/upload/wx.uploadFile.html