.net 小程序获取用户UnionID

lihuanancn 2018-04-03 原文

.net 小程序获取用户UnionID

第一次写博客，写的不好多多海涵！

1.小程序获取UnionID的流程
用code去换取session_key，然后去解密小程序获取到的那串字符！

话不多说，原理大家都懂！！！！！！

直接上代码

 1   public string GetMiniAppUserUnionID(string code, string userInfo, string iv)
 2   {
 5             Dictionary<string, string> parames = new Dictionary<string, string>();
 6             parames.Add("appid", "");
 7             parames.Add("secret", "");
 8             parames.Add("js_code", code);
 9             parames.Add("grant_type", "authorization_code");
10             string res = HttpWebResponseHelper.Get("https://api.weixin.qq.com/sns/jscode2session", parames);
12             var obj = Parse(res);
               string unionid="";
13             if (!res.Contains("errcode"))
14             {
15                 userJson = AESDecrypt(userInfo, obj.session_key, iv);
16                 var userobj = Parse(userJson);
17                 unionid = userobj.unionId;
               }

               return unionid ;

19  }

AESDecrypt解密算法

 1         /// <summary>
 2         /// AES解密
 3         /// </summary>
 4         /// <param name="text"></param>
 5         /// <param name="password"></param>
 6         /// <param name="iv"></param>
 7         /// <returns></returns>
 8         public static string AESDecrypt(string text, string password, string iv)
 9         {
10             RijndaelManaged rijndaelCipher = new RijndaelManaged();
11             rijndaelCipher.Mode = CipherMode.CBC;
12             rijndaelCipher.Padding = PaddingMode.PKCS7;
13 
14             byte[] encryptedData = Convert.FromBase64String(text);
15             byte[] pwdBytes = Convert.FromBase64String(password);
16 
17             rijndaelCipher.Key = pwdBytes;
18 
19             if (!string.IsNullOrEmpty(iv))
20             {
21                 byte[] ivBytes = Convert.FromBase64String(iv); 
22                 rijndaelCipher.IV = ivBytes;
23             }
24             ICryptoTransform transform = rijndaelCipher.CreateDecryptor();
25             byte[] plainText = transform.TransformFinalBlock(encryptedData, 0, encryptedData.Length);
26 
27             return Encoding.UTF8.GetString(plainText);
28 
29         }

序列化方法

1   public static dynamic Parse(string json, Encoding encoding)
2         {
3             using (var reader = JsonReaderWriterFactory.CreateJsonReader(encoding.GetBytes(json), XmlDictionaryReaderQuotas.Max))
4             {
5                 return ToValue(XElement.Load(reader));
6             }
7         }