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.net 微信开发 —— OAuth2 认证之微信H5(前后端不分离)

在19年出开始接触微信的开发,OAuth认证是我遇到的第一个难题。边学习边记录

首先在微信公众平台配置网页授权域名

 

.net 微信开发 —— OAuth2 认证之微信H5(前后端不分离)

 

 

需要用到的DLL

Senparc.Weixin.dll

Senparc.Weixin.MP.dll

Senparc.Weixin.WxOpen.dll

 

首先创建一个身份认证的特性 放在所有Controller里面

.net 微信开发 —— OAuth2 认证之微信H5(前后端不分离)

 

OAuth2AuthorizeAttribute.cs  代码如下

public class OAuth2AuthorizeAttribute : AuthorizeAttribute     {         /// <summary>         /// 验证是否已存用户的wxopenid         /// </summary>         /// <param name="filterContext"></param>         public override void OnAuthorization(AuthorizationContext filterContext)         {              try             {                 var request = filterContext.HttpContext.Request;//获取http请求                                  var req = filterContext.HttpContext.Request.RawUrl.ToString();//拿到完整url

var d = HttpContext.Current.Request.Url.ToString();//这个也是拿到完整的url 只不过这个可以拿到路由里面的参数 上面则不可以 Common.Logs._StrUrl = d;//存到一个常量里面 //判断cookie里面有没有存这个用户的wxopenid if (string.IsNullOrWhiteSpace(TUser.GetUserOpenId())) { //如果cookie里面没有用户的wxopenid则重定向 filterContext.Result = new RedirectToRouteResult(new RouteValueDictionary(new { controller = "OAuth2", action = "index", strurl = Common.Logs._StrUrl, })); } } catch (Exception ex) { } } }

 

TUser.cs 

 public static class TUser     {         #region 变量区域          #region Cookie Keys         /// <summary>         /// UserPwd Cookie Key         /// </summary>         public static string UserOpenIdKey = "577355724964";          /// <summary>         /// ValueExt         /// </summary>         public static string ValueExt = "_isoks";           /// <summary>         /// CookieName         /// </summary>         public static string CookieName = "596f727a696b752e576562";           #endregion          #endregion          #region+GetUserOpenId 获取UserOpenId          public static string GetUserOpenId()         {             try             {                 var cookie = GetCookie();                 if (cookie == null) return string.Empty;                 var userOpenId = cookie.Values[UserOpenIdKey];                 return userOpenId;             }             catch             {                 return string.Empty;             }             return string.Empty;         }          #endregion          #region +SetCookie 设置登录的cookie         /// <summary>         /// 设置登录的cookie         /// </summary>         /// <param name="id">id</param>         /// <param name="name">用户名</param>         public static void SetUserOpenId(string userOpenId)         {             var cookie = new HttpCookie(CookieName) { HttpOnly = true };             cookie.Values.Add(UserOpenIdKey, userOpenId);             //cookie.Expires = DateTime.Now.AddDays(30);             HttpContext.Current.Response.SetCookie(cookie);         }         #endregion          #region +GetCookie 获取Cookie实例          /// <summary>         /// 获取Cookie实例         /// </summary>         /// <returns></returns>         public static HttpCookie GetCookie()         {             try             {                 var key = CookieName;                 var cookie = HttpContext.Current.Request.Cookies[key];                 return cookie;             }             catch             {                 return null;             }         }         #endregion      }

 

 

OAuth2Controller 代码 

 /// <summary>     /// 调用微信API换取WXOpenid     /// </summary>     public class OAuth2Controller : BaseController     {         /// <summary>         /// 定义一个常量用来存储需要请求的路径         /// </summary>         public static string PrevUrl = string.Empty;         public ActionResult Index(string strurl = "")         {             //给常量赋值             PrevUrl = strurl;             //调用微信API接口 BAPPID=公众号的APPID  BREDIRECTURL=接收微信返回结果的路由 例:http://localhost/OAuth2/RedirectUrl             var uri = OAuthApi.GetAuthorizeUrl(BAPPID, BREDIRECTURL, "0", OAuthScope.snsapi_userinfo);             //重定向访问微信授权地址             return Redirect(uri);         }          /// <summary>         /// 微信OAuthApi回调         /// </summary>         /// <param name="code">状态码</param>         /// <param name="state"></param>         /// <returns></returns>         public ActionResult RedirectUrl(string code, string state)         {             try             {                 //判断状态码是否为空                 if (string.IsNullOrEmpty(code))                 {                     return Json(new { State = false, Msg = "哎呀,出错了!" });                 }                                //定义一个接收Tokoen的result                 OAuthAccessTokenResult result = null;                 try                 {                     result = OAuthApi.GetAccessToken(BAPPID, BSECRET, code);                 }                 catch (Exception ex)                 {                     return Json(new { State = false, Msg = "哎呀,出错了!" });                 }                 if (result.errcode != ReturnCode.请求成功)                 {                     return Json(new { State = false, Msg = "哎呀,出错了!" });                 }                   //拿到token以后调用微信接口 用token和openid换去用户信息                 var userinfo = OAuthApi.GetUserInfo(result.access_token, result.openid);                 //拿到用户信息后创建或修改自己项目中的用户表                 if (userinfo != null)                 {                     var user = UserRepository.GetUserByWxOpenId(result.openid);                     if (user != null)                     {                         user.NickName = userinfo.nickname;                         user.HeadImg = userinfo.headimgurl;                         user.UserSex = (UserSex)Enum.Parse(typeof(UserSex), userinfo.sex.ToString());                         UserRepository.SaveOrUpdate(user);                     }                     else                     {                         //create user                         User guser = new User();                         guser.WxOpenId = result.openid;                         guser.HeadImg = userinfo.headimgurl;                         guser.NickName = userinfo.nickname;                         guser.State = true;                         guser.UserSex = (UserSex)Enum.Parse(typeof(UserSex), userinfo.sex.ToString());                         guser.AddTime = DateTime.Now;                         guser.UserType = UserType.游客;                         guser.GuId = Guid.NewGuid().ToString();                         UserRepository.SaveOrUpdate(guser);                     }                 }                 //将用户的openid存起来                 TUser.SetUserOpenId(result.openid);                 //跳转程序原来要跳转的路由                 if (IsoksIsNullOrWhiteSpace(PrevUrl))                 {                     return Redirect(PrevUrl);                 }                 return Redirect("~/home/index");             }             catch (Exception ex)             {                 log(ex.Message, "出错啦");             }             return Error500cshtml();         }     }

 

 

总体思路:客户端发来请求,通过过滤器拿到要请求的路径,判断cookie里面有没有存当前用户的wxopenid,如果存了直接跳转正常要请求的路径,如果wxopenid为空 则重定向到OAuth2Controll 根据配置的APPID和BREDIRECTURL=重定向url跟微信API进行交互获取用户的微信信息进行创建或更新用户并在cookie里面存储用户信息

 

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