ASP.Net 微信H5 OAuth2 认证 (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
需要用到的DLL
首先创建一个身份认证的特性 放在所有Controller里面
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
文章来源:https://www.cnblogs.com/kangsir7/p/15741437.html
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