微信小程式登錄獲取手機號後臺C#流程代碼

最近在做這個登錄功能介面，記錄一下 1、小程式端調用wx.login方法獲取code，後端使用WeChatAuth方法請求auth.code2Session介面使用appid、secret、js_code、grant_type：預設authorization_code獲取session_key、op ...

最近在做這個登錄功能介面，記錄一下

1、小程式端調用wx.login方法獲取code，後端使用WeChatAuth方法請求auth.code2Session介面使用appid、secret、js_code、grant_type：預設authorization_code獲取session_key、openid

auth.code2Session官方地址：https://developers.weixin.qq.com/miniprogram/dev/api-backend/open-api/login/auth.code2Session.html

2、後端通過redis保存session_key、openid自定義登錄狀態並返回小程式端(也可以直接將兩個參數傳回小程式端，但是不安全)

3、小程式端使用button讓用戶進行授權獲取到encryptedData、iv加密數據和自定義狀登錄狀態傳回後端WeChatAuthUserInfo方法，判斷登錄狀態

4、後端使用Decrypt方法將加密數據進行解密，並反序列化為PhoneInfo類獲取到手機號進行資料庫操作

  1 /// <summary>
  2         /// 微信小程式-獲取登陸憑證code
  3         /// </summary>
  4         /// <param name="_"></param>
  5         /// <returns></returns>
  6         public Response WeChatAuth(dynamic _)
  7         {
  8 
  9             WechatLoginInfo req = this.GetReq<WechatLoginInfo>();
 10             string Auth_code = req.code;
 11             if (string.IsNullOrEmpty(Auth_code))
 12             {
 13                 return Fail("未獲取到Auth_code");
 14             }
 15             string AppId = Config.GetValue("WeChatAppId");
 16             string AppSecret = Config.GetValue("WeChatAppSecret");
 17 
 18 
 19             WebClient wc = new WebClient();
 20             wc.Encoding = System.Text.Encoding.UTF8;
 21 
 22 
 23             //第一步：通過code換取網頁授權access_token
 24             NameValueCollection tokennvc = new NameValueCollection();
 25             tokennvc.Add("appid", AppId);
 26             tokennvc.Add("secret", AppSecret);
 27             tokennvc.Add("js_code", Auth_code);
 28             tokennvc.Add("grant_type", "authorization_code");
 29             string tokenresult = System.Text.Encoding.UTF8.GetString(wc.UploadValues("https://api.weixin.qq.com/sns/jscode2session?", tokennvc));
 30             if (tokenresult.Contains("errcode"))
 31             {
 32                 AccessError accessError = Newtonsoft.Json.JsonConvert.DeserializeObject<AccessError>(tokenresult);
 33                 return Fail(accessError.errmsg);
 34             }
 35 　　　　　　　//反序列化
 36             AuthAccessToken auth = Newtonsoft.Json.JsonConvert.DeserializeObject<AuthAccessToken>(tokenresult);
 37 
 38             TimeSpan ts = new TimeSpan(48, 0, 0);
 39             string token_session = Guid.NewGuid().ToString();
 40 
 41             //寫入Redis，寫入9號庫
 42             redisCache.Write<AuthAccessToken>("WeChatLogin_"+ token_session, auth, ts, CacheId.clientuser);
 43 
 44             return Success(token_session);
 45         }
 49          77 
 78         /// <summary>
 79         /// 根據微信小程式平臺提供的解密演算法解密數據
 80         /// </summary>
 81         /// <param name="encryptedData">加密數據</param>
 82         /// <param name="iv">初始向量</param>
 83         /// <param name="sessionKey">從服務端獲取的SessionKey</param>
 84         /// <returns></returns>
 85         public PhoneInfo Decrypt(WechatLoginInfo loginInfo,string session_key)
 86         {
 87 
 88             //創建解密器生成工具實例
 89             AesCryptoServiceProvider aes = new AesCryptoServiceProvider();
 90 
 91             //設置解密器參數
 92 
 93             aes.Mode = CipherMode.CBC;
 94 
 95             aes.BlockSize = 128;
 96 
 97             aes.Padding = PaddingMode.PKCS7;
 98 
 99             //格式化待處理字元串
100 
101             byte[] byte_encryptedData = Convert.FromBase64String(loginInfo.encryptedData);
102 
103             byte[] byte_iv = Convert.FromBase64String(loginInfo.iv);
104 
105             byte[] byte_sessionKey = Convert.FromBase64String(session_key);
106 
107             aes.IV = byte_iv;
108 
109             aes.Key = byte_sessionKey;
110 
111             //根據設置好的數據生成解密器實例
112 
113             ICryptoTransform transform = aes.CreateDecryptor();
114 
115             //解密
116 
117             byte[] final = transform.TransformFinalBlock(byte_encryptedData, 0, byte_encryptedData.Length);
118 
119             //生成結果
120 
121             string result = Encoding.UTF8.GetString(final);
122 
123             //反序列化結果，生成用戶信息實例
124 
125            var phoneInfo = Newtonsoft.Json.JsonConvert.DeserializeObject<PhoneInfo>(result);
126 
127             return phoneInfo;
128 
129         }
130 
131 
132         /// <summary>
133         /// 獲取微信小程式用戶信息
134         /// </summary>
135         /// <param name="_">The .</param>
136         /// <returns></returns>
137         public Response WeChatAuthUserInfo(dynamic _)
138         {
139             WechatLoginInfo req = this.GetReq<WechatLoginInfo>();
140             var AuthLogin = redisCache.Read<AuthAccessToken>("WeChatLogin_"+req.token_session, CacheId.clientuser);
141             if (AuthLogin== null)
142             {
143                 return Fail("找不到登錄密鑰");
144             }
145 
146             //數據解密，解密手機號等重要信息
147             PhoneInfo userinfojson = Decrypt(req,AuthLogin.session_key);
148 
149             if (userinfojson==null)
150             {
151                 return Fail("數據解密失敗");
152             }
153 
154             string Token = Guid.NewGuid().ToString();
155             string Nick_Name = "微信用戶_" + Token.Substring(0, 8);
156             string UserId = "";
157 
158             #region
159             U_UserEntity userinfo = u_UserBLL.GetEntityByOpenId(AuthLogin.openid);
160             if (userinfo != null)
161             {
162                 userinfo.Phone = userinfojson.phoneNumber;
163                 userinfo.OpenId = AuthLogin.openid;
164                 u_UserBLL.SaveEntity(userinfo.Id, userinfo);
165                 UserId = userinfo.Id;
166             }
167             else
168             {
169                 U_UserEntity entity = new U_UserEntity();
170                 entity.Id = Guid.NewGuid().ToString();
171                 entity.Nick_Name = Nick_Name;
172                 entity.Phone = userinfojson.phoneNumber;
173                 entity.OpenId = AuthLogin.openid;
174                 entity.AddTime = DateTime.Now;
175                 u_UserBLL.SaveEntity("", entity);
176 
177                 UserId = entity.Id;
178             }
179             
180             ResUserInfo userentity = new ResUserInfo();
181             userentity.Id = UserId;
182             userentity.Token = Token;
183             userentity.Nick_Name = Nick_Name;
184             userentity.Phone = userinfojson.phoneNumber;
185             userentity.AddTime = DateTime.Now;
186             userentity.OpenId = AuthLogin.openid;
187 
188             TimeSpan ts = new TimeSpan(48, 0, 0);
189 
190             //寫入Redis，寫入9號庫
191             redisCache.Write<ResUserInfo>(Token, userentity, ts, CacheId.clientuser);
192 
193             #endregion
194 
195             return Success(userentity);
196         }
197 
198 
199         /// <summary>
200         /// 錯誤信息
201         /// </summary>
202         public class AccessError
203         {
204             /// <summary>
205             /// 錯誤碼
206             /// </summary>
207             public string errcode { get; set; }
208             /// <summary>
209             /// 錯誤信息
210             /// </summary>
211             public string errmsg { get; set; }
212         }
213 
214         /// <summary>
215         /// 獲取AccessToken
216         /// </summary>
217         public class AuthAccessToken
218         {
219             //會話密鑰,
220             public string session_key { get; set; }
221             /// <summary>
222             /// access_token介面調用憑證超時時間，單位（秒）
223             /// </summary>
224             public string expires_in { get; set; }
225             /// <summary>
226             /// 獲取到的憑證
227             /// </summary>
228             public string access_token { get; set; }
229             /// <summary>
230             /// 用戶唯一標識，請註意，在未關註公眾號時，用戶訪問公眾號的網頁，也會產生一個用戶和公眾號唯一的OpenID
231             /// </summary>
232             public string openid { get; set; }
233 
234         }
235    299 
300         /// <summary>
301         /// 加密的數據
302         /// </summary>
303         public class Watermark
304 
305         {
306             public string appid { get; set; }
307 
308             public string timestamp { get; set; }
309 
310         }
311 
312         /// <summary>
313         /// 登錄獲取信息請求參數
314         /// </summary>
315         public class WechatLoginInfo
316         {
317             //自定義登錄狀態,
318             public string token_session { get; set; }
319 
320             public string code { get; set; }
321 
322             /// <summary>
323             ///加密數據
324             /// </summary>
325             /// <value>
326             /// </value>
327             public string encryptedData { get; set; }
328 
329             /// <summary>
330             /// 加密演算法的初始向量
331             /// </summary>
332             /// <value>
333             /// The iv.
334             /// </value>
335             public string iv { get; set; }
336 
337             /// <summary>
338             /// 不包括敏感信息的原始數據字元串，用於計算簽名
339             /// </summary>
340             /// <value>
341             /// The raw data.
342             /// </value>
343             public WeChatUserInfo rawData { get; set; }
344 
345             /// <summary>
346             /// 校驗用戶信息
347             /// </summary>
348             /// <value>
349             /// The signature.
350             /// </value>
351             public string signature { get; set; }
352 
353             public WeChatUserInfo UserInfo { get; set; }
354 
355             /// <summary>
356             /// 語言.
357             /// </summary>
358             /// <value>
359             /// The language.
360             /// </value>
361             public string language { get; set; }
362 
363         }
364 
365         /// <summary>
366         /// 手機號信息
367         /// </summary>
368         public class PhoneInfo
369         {
370 
371             /// <summary>
372             /// 用戶的唯一標識
373             /// </summary>
374             public string openid { get; set; }
375             /// <summary>
376             /// 用戶綁定的手機號
377             /// </summary>
378             /// <value>
379             /// The phone number.
380             /// </value>
381             public string phoneNumber { get; set; }
382             /// <summary>
383             /// 沒有區號的手機號
384             /// </summary>
385             /// <value>
386             /// The pure phone number.
387             /// </value>
388             public string purePhoneNumber { get; set; }
389             /// <summary>
390             /// 區號
391             /// </summary>
392             /// <value>
393             /// The country code.
394             /// </value>
395             public string countryCode { get; set; }
396 
397 
398             public Watermark watermark { get; set; }
399         }

微信小程式登錄獲取手機號 後臺C#流程代碼

微信小程式登錄獲取手機號後臺C#流程代碼