Api/Dilon.Core/OAuth/WechatOAuth.cs

@@ -0,0 +1,102 @@
+using Furion.DependencyInjection;
+using Furion.FriendlyException;
+using Furion.RemoteRequest.Extensions;
+using Microsoft.Extensions.Configuration;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+
+namespace Dilon.Core.OAuth
+{
+    public class WechatOAuth : IWechatOAuth, ISingleton
+    {
+        private readonly string _authorizeUrl = "https://open.weixin.qq.com/connect/oauth2/authorize";
+        private readonly string _accessTokenUrl = "https://api.weixin.qq.com/sns/oauth2/access_token";
+        private readonly string _refreshTokenUrl = "https://api.weixin.qq.com/sns/oauth2/refresh_token";
+        private readonly string _userInfoUrl = "https://api.weixin.qq.com/sns/userinfo";
+
+        private readonly OAuthConfig _oauthConfig;
+
+        public WechatOAuth(IConfiguration configuration)
+        {
+            _oauthConfig = OAuthConfig.LoadFrom(configuration, "oauth:wechat");
+        }
+
+        /// <summary>
+        /// 发起授权
+        /// </summary>
+        /// <param name="state"></param>
+        /// <returns></returns>
+        public string GetAuthorizeUrl(string state = "")
+        {
+            var param = new Dictionary<string, string>()
+            {
+                ["appid"] = _oauthConfig.AppId,
+                ["redirect_uri"] = _oauthConfig.RedirectUri,
+                ["response_type"] = "code",
+                ["scope"] = _oauthConfig.Scope,
+                ["state"] = state
+            };
+            return $"{_authorizeUrl}?{param.ToQueryString()}#wechat_redirect";
+        }
+
+        /// <summary>
+        /// 获取微信Token
+        /// </summary>
+        /// <param name="code"></param>
+        /// <param name="state"></param>
+        /// <returns></returns>
+        public async Task<TokenModel> GetAccessTokenAsync(string code, string state = "")
+        {
+            var param = new Dictionary<string, string>()
+            {
+                ["appid"] = _oauthConfig.AppId,
+                ["secret"] = _oauthConfig.AppKey,
+                ["code"] = code,
+                ["grant_type"] = "authorization_code"
+            };
+            var accessTokenModel = await $"{_accessTokenUrl}?{param.ToQueryString()}".GetAsAsync<TokenModel>();
+            if (accessTokenModel.HasError())
+                throw Oops.Oh($"{ accessTokenModel.ErrorDescription}");
+            return accessTokenModel;
+        }
+
+        /// <summary>
+        /// 获取微信用户基本信息
+        /// </summary>
+        /// <param name="accessToken"></param>
+        /// <param name="openId"></param>
+        /// <returns></returns>
+        public async Task<UserInfoModel> GetUserInfoAsync(string accessToken, string openId)
+        {
+            var param = new Dictionary<string, string>()
+            {
+                ["access_token"] = accessToken,
+                ["openid"] = openId,
+                ["lang"] = "zh_CN",
+            };
+            var userInfoModel = await $"{_userInfoUrl}?{param.ToQueryString()}".GetAsAsync<UserInfoModel>();
+            if (userInfoModel.HasError())
+                throw Oops.Oh($"{ userInfoModel.ErrorMessage}");
+            return userInfoModel;
+        }
+
+        /// <summary>
+        /// 刷新微信Token
+        /// </summary>
+        /// <param name="refreshToken"></param>
+        /// <returns></returns>
+        public async Task<TokenModel> GetRefreshTokenAsync(string refreshToken)
+        {
+            var param = new Dictionary<string, string>()
+            {
+                ["appid"] = _oauthConfig.AppId,
+                ["grant_type"] = "refresh_token",
+                ["refresh_token"] = refreshToken
+            };
+            var refreshTokenModel = await $"{_refreshTokenUrl}?{param.ToQueryString()}".GetAsAsync<TokenModel>();
+            if (refreshTokenModel.HasError())
+                throw Oops.Oh($"{ refreshTokenModel.ErrorDescription}");
+            return refreshTokenModel;
+        }
+    }
+}