C#怎么实现微信小程序服务端获取用户解密信息

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C#微信小程序服务端获取用户解密信息实例代码

实现代码：

using AIOWeb.Models; using Newtonsoft.Json; using Newtonsoft.Json.Linq; using System; using System.Collections.Generic; using System.Data; using System.Data.SqlClient; using System.Linq; using System.Web;  namespace AIOWeb {   /// 
   /// wxapi 的摘要说明   /// 
   public class wxapi : IHttpHandler   {     public void ProcessRequest(HttpContext context)     {       context.Response.ContentType = "text/plain";        string code = "";       string iv = "";       string encryptedData = "";       try       {         code = HttpContext.Current.Request.QueryString["code"].ToString();         iv = HttpContext.Current.Request.QueryString["iv"].ToString();         encryptedData = HttpContext.Current.Request.QueryString["encryptedData"].ToString();       }       catch (Exception ex)       {         context.Response.Write(ex.ToString());       }        string Appid = "wxdb2641f85b04f1b3";       string Secret = "8591d8cd7197b9197e17b3275329a1e7";       string grant_type = "authorization_code";        //向微信服务端 使用登录凭证 code 获取 session_key 和 openid        string url = "https://api.weixin.qq.com/sns/jscode2session?appid=" + Appid + "&secret=" + Secret + "&js_code=" + code + "&grant_type=" + grant_type;       string type = "utf-8";        AIOWeb.Models.GetUsersHelper GetUsersHelper = new AIOWeb.Models.GetUsersHelper();       string j = GetUsersHelper.GetUrltoHtml(url, type);//获取微信服务器返回字符串        //将字符串转换为json格式       JObject jo = (JObject)JsonConvert.DeserializeObject(j);        result res = new result();       try       {         //微信服务器验证成功         res.openid = jo["openid"].ToString();         res.session_key = jo["session_key"].ToString();       }       catch (Exception)       {         //微信服务器验证失败         res.errcode = jo["errcode"].ToString();         res.errmsg = jo["errmsg"].ToString();       }       if (!string.IsNullOrEmpty(res.openid))       {         //用户数据解密         GetUsersHelper.AesIV = iv;         GetUsersHelper.AesKey = res.session_key;          string result = GetUsersHelper.AESDecrypt(encryptedData);           //存储用户数据         JObject _usrInfo = (JObject)JsonConvert.DeserializeObject(result);          userInfo userInfo = new userInfo();         userInfo.openId = _usrInfo["openId"].ToString();          try //部分验证返回值中没有unionId         {           userInfo.unionId = _usrInfo["unionId"].ToString();         }         catch (Exception)         {           userInfo.unionId = "unionId";         }                  userInfo.nickName = _usrInfo["nickName"].ToString();         userInfo.gender = _usrInfo["gender"].ToString();         userInfo.city = _usrInfo["city"].ToString();         userInfo.province = _usrInfo["province"].ToString();         userInfo.country = _usrInfo["country"].ToString();         userInfo.avatarUrl = _usrInfo["avatarUrl"].ToString();          object watermark = _usrInfo["watermark"].ToString();         object appid = _usrInfo["watermark"]["appid"].ToString();         object timestamp = _usrInfo["watermark"]["timestamp"].ToString();           #region           //创建连接池对象（与数据库服务器进行连接）         SqlConnection conn = new SqlConnection("server=127.0.0.1;database=Test;uid=sa;pwd=1");         //打开连接池         conn.Open();         //创建命令对象         string Qrystr = "SELECT * FROM WeChatUsers WHERE openId='" + userInfo.openId + "'";         SqlCommand cmdQry = new SqlCommand(Qrystr, conn);         object obj = cmdQry.ExecuteScalar();         if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))         {           string str = "INSERT INTO WeChatUsers ([UnionId] ,[OpenId],[NickName],[Gender],[City],[Province],[Country],[AvatarUrl],[Appid],1592866058,[Memo],[counts])VALUES('" + userInfo.unionId + "','" + userInfo.openId + "','" + userInfo.nickName + "','" + userInfo.gender + "','" + userInfo.city + "','" + userInfo.province + "','" + userInfo.country + "','" + userInfo.avatarUrl + "','" + appid.ToString() + "','" + timestamp.ToString() + "','来自微信小程序','1')";            SqlCommand cmdUp = new SqlCommand(str, conn);           // 执行操作           try           {             int row = cmdUp.ExecuteNonQuery();           }           catch (Exception ex)           {             context.Response.Write(ex.ToString());           }         }         else         {           //多次访问，记录访问次数counts  更新unionId是预防最初没有，后期关联后却仍未记录           string str = "UPDATE dbo.WeChatUsers SET counts = counts+1，UnionId = '" + userInfo.unionId + "' WHERE OpenId='" + userInfo.openId + "'";           SqlCommand cmdUp = new SqlCommand(str, conn);           int row = cmdUp.ExecuteNonQuery();         }                  //关闭连接池         conn.Close();         #endregion          //返回解密后的用户数据         context.Response.Write(result);       }       else       {         context.Response.Write(j);       }     }      public bool IsReusable     {       get       {         return false;       }     }   } }

GetUsersHelper 帮助类

using System; using System.Collections.Generic; using System.IO; using System.Linq; using System.Security.Cryptography; using System.Text; using System.Threading.Tasks;  namespace AIOWeb.Models {   public class GetUsersHelper   {      /// 
     /// 获取链接返回数据     /// 
     /// 链接     /// 请求类型     ///      public string GetUrltoHtml(string Url, string type)     {       try       {         System.Net.WebRequest wReq = System.Net.WebRequest.Create(Url);         // Get the response instance.         System.Net.WebResponse wResp = wReq.GetResponse();         System.IO.Stream respStream = wResp.GetResponseStream();         // Dim reader As StreamReader = New StreamReader(respStream)         using (System.IO.StreamReader reader = new System.IO.StreamReader(respStream, Encoding.GetEncoding(type)))         {           return reader.ReadToEnd();         }       }       catch (System.Exception ex)       {         return ex.Message;       }     }     #region 微信小程序用户数据解密      public static string AesKey;     public static string AesIV;      /// 
     /// AES解密     /// 
     /// 输入的数据encryptedData     /// key     /// 向量128     /// 解密后的字符串     public string AESDecrypt(string inputdata)     {       try       {         AesIV = AesIV.Replace(" ", "+");         AesKey = AesKey.Replace(" ", "+");         inputdata = inputdata.Replace(" ", "+");         byte[] encryptedData = Convert.FromBase64String(inputdata);          RijndaelManaged rijndaelCipher = new RijndaelManaged();         rijndaelCipher.Key = Convert.FromBase64String(AesKey); // Encoding.UTF8.GetBytes(AesKey);         rijndaelCipher.IV = Convert.FromBase64String(AesIV);// Encoding.UTF8.GetBytes(AesIV);         rijndaelCipher.Mode = CipherMode.CBC;         rijndaelCipher.Padding = PaddingMode.PKCS7;         ICryptoTransform transform = rijndaelCipher.CreateDecryptor();         byte[] plainText = transform.TransformFinalBlock(encryptedData, 0, encryptedData.Length);         string result = Encoding.UTF8.GetString(plainText);          return result;       }       catch (Exception)       {         return null;        }     }     #endregion   } }

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