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C# WeChat Mini Programs server obtains the instance code of user decryption information

Implementation code:

Summary description of 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 / / 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"; / / use login credential code to obtain session_key and openid string url = "https://api.weixin.qq.com/sns/jscode2session?appid=" + Appid +" & secret= "+ Secret +" & js_code= "+ code +" & grant_type= "+ grant_type from Wechat server String type = "utf-8"; AIOWeb.Models.GetUsersHelper GetUsersHelper = new AIOWeb.Models.GetUsersHelper (); string j = GetUsersHelper.GetUrltoHtml (url, type); / / get the string returned by Wechat server / / convert the string to json format JObject jo = (JObject) JsonConvert.DeserializeObject (j); result res = new result () Try {/ / Wechat server verification succeeded res.openid = jo ["openid"] .ToString (); res.session_key = jo ["session_key"] .ToString ();} catch (Exception) {/ / Wechat server verification failed res.errcode = jo ["errcode"] .ToString () Res.errmsg = jo ["errmsg"]. ToString ();} if (! string.IsNullOrEmpty (res.openid)) {/ / user data decryption GetUsersHelper.AesIV = iv; GetUsersHelper.AesKey = res.session_key; string result = GetUsersHelper.AESDecrypt (encryptedData); / / Storage user data JObject _ usrInfo = (JObject) JsonConvert.DeserializeObject (result) UserInfo userInfo = new userInfo (); userInfo.openId = _ usrInfo ["openId"] .ToString (); try / / partial verification returns no 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 / / create a connection pool object (connect to the database server) SqlConnection conn = new SqlConnection ("server=127.0.0.1;database=Test;uid=sa;pwd=1") / / Open connection pool conn.Open (); / / create command object 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 () + ", 'from WeChat Mini Programs','1')" SqlCommand cmdUp = new SqlCommand (str, conn); / / execute operation try {int row = cmdUp.ExecuteNonQuery ();} catch (Exception ex) {context.Response.Write (ex.ToString ()) }} else {/ / multiple visits, record the number of visits counts update unionId is not prevented at first, but still not recorded after the later association 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 ();} / / close connection pool conn.Close (); # endregion / / return decrypted user data context.Response.Write (result);} else {context.Response.Write (j) }} public bool IsReusable {get {return false;}

GetUsersHelper help class

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 {/ Link / request type / 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 WeChat Mini Programs user data decryption public static string AesKey; public static string AesIV / AES decrypts / input data encryptedData / key / / Vector 128C / string 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}} the above is about the content of this article on "how to achieve WeChat Mini Programs server to obtain user decryption information". I believe everyone has a certain understanding. I hope the content shared by the editor will be helpful to you. If you want to know more about the relevant knowledge, please follow the industry information channel.

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