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#region Apache License Version 2.0
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/*----------------------------------------------------------------
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Copyright 2022 Suzhou Senparc Network Technology Co.,Ltd.
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Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
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except in compliance with the License. You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software distributed under the
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License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
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either express or implied. See the License for the specific language governing permissions
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and limitations under the License.
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Detail: https://github.com/JeffreySu/WeiXinMPSDK/blob/master/license.md
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----------------------------------------------------------------*/
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#endregion Apache License Version 2.0
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/*----------------------------------------------------------------
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Copyright (C) 2022 Senparc
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文件名：WxOpenMessageHandlerMiddleware.cs
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文件功能描述：公众号 MessageHandler 中间件
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创建标识：Senparc - 20191004
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----------------------------------------------------------------*/
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#if !NET462
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using Microsoft.AspNetCore.Builder;
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using Microsoft.AspNetCore.Http;
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using Senparc.CO2NET.Extensions;
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using Senparc.CO2NET.Trace;
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using Senparc.NeuChar.Context;
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using Senparc.NeuChar.MessageHandlers;
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using Senparc.NeuChar.Middlewares;
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using Senparc.Weixin.Entities;
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using Senparc.Weixin.Work.Entities;
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using Senparc.Weixin.Work.MessageContexts;
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using System;
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using System.IO;
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using System.Threading.Tasks;
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namespace Senparc.Weixin.Work.MessageHandlers.Middleware
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{
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/// <summary>
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/// 企业号 MessageHandler 中间件
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/// </summary>
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/// <typeparam name="TMC">上下文类型</typeparam>
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public class WorkMessageHandlerMiddleware<TMC>
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: MessageHandlerMiddleware<TMC, IWorkRequestMessageBase, IWorkResponseMessageBase, PostModel, ISenparcWeixinSettingForWork>,
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IMessageHandlerMiddleware<TMC, IWorkRequestMessageBase, IWorkResponseMessageBase, PostModel, ISenparcWeixinSettingForWork>
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where TMC : DefaultWorkMessageContext, IMessageContext<IWorkRequestMessageBase, IWorkResponseMessageBase>, new()
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{
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/// <summary>
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/// EnableRequestRewindMiddleware
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/// </summary>
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/// <param name="next"></param>
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public WorkMessageHandlerMiddleware(RequestDelegate next, IServiceProvider serviceProvider,
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Func<Stream, PostModel, int, IServiceProvider, MessageHandler<TMC, IWorkRequestMessageBase, IWorkResponseMessageBase>> messageHandler,
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Action<MessageHandlerMiddlewareOptions<ISenparcWeixinSettingForWork>> options)
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: base(next, serviceProvider, messageHandler, options)
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{
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}
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public override async Task<bool> GetCheckSignature(HttpContext context)
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{
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//Url 参数：msg_signature=64d481da37981dd88ab9926a82534f0222905286×tamp=1570283669&nonce=1569937039&echostr=XwdIMYbHVlZl1V2ckFg6P4ScQytQrDaOG00fgu0SStDQWQstJ2ApLFdYV%2F2BtzZB1%2FISW0KhLqPBiQSaAVabVQ%3D%3D
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var postModel = GetPostModel(context);
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var echostr = this.GetEchostr(context);
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var canCheck = !string.IsNullOrEmpty(postModel.Msg_Signature) && !string.IsNullOrEmpty(postModel.Timestamp) && !string.IsNullOrEmpty(postModel.Nonce) && !string.IsNullOrEmpty(echostr);
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string verifyUrl = null;
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if (canCheck)
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{
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verifyUrl = Work.Signature.VerifyURL(postModel.Token, postModel.EncodingAESKey, postModel.CorpId, postModel.Msg_Signature /*这里调用方法的参数名称不明确*/,
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postModel.Timestamp, postModel.Nonce, echostr);
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}
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if (verifyUrl != null)
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{
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context.Response.ContentType = "text/plain;charset=utf-8";
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await context.Response.WriteAsync(verifyUrl).ConfigureAwait(false);//返回解密后的随机字符串则表示验证通过
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return true;
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}
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else
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{
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context.Response.ContentType = "text/html;charset=utf-8";
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var correctSignature = !canCheck
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? "企业号中，Url 中的 timestamp, nonce, echostr 参数必须提供，否则无法进行签名验证！"
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: Work.Signature.GenarateSinature(postModel.Token, postModel.Timestamp, postModel.Nonce, postModel.Msg_Signature/*此参数不能为空*/);
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var msgTip = base.GetGetCheckFaildMessage(context, postModel.Msg_Signature, correctSignature);
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await context.Response.WriteAsync(msgTip);
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return false;
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}
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}
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public override async Task<bool> PostCheckSignature(HttpContext context)
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{
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//Url 参数：msg_signature=3eea248d554c5ce1586f897ca3ca6b390d698254×tamp=1570287086&nonce=1570089610
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var postModel = GetPostModel(context);
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Senparc.Weixin.Work.Tencent.WXBizMsgCrypt crypt = new Senparc.Weixin.Work.Tencent.WXBizMsgCrypt(postModel.Token, postModel.EncodingAESKey, postModel.CorpId);
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string replyEchoStr = null;
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var result = Senparc.Weixin.Work.Tencent.WXBizMsgCrypt.GenarateSinature(postModel.Token, postModel.Timestamp, postModel.Nonce, postModel.EncodingAESKey, ref replyEchoStr);
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if (result != 0)
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{
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context.Response.ContentType = "text/plain;charset=utf-8";
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await context.Response.WriteAsync("签名校验失败！").ConfigureAwait(false);
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return false;
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}
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return true;
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}
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public override string GetEchostr(HttpContext context)
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{
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return context.Request.Query["echostr"];
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}
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public override PostModel GetPostModel(HttpContext context)
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{
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var senparcWeixinSetting = base._accountSettingFunc(context);
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PostModel postModel = new PostModel()
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{
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Token = senparcWeixinSetting.WeixinCorpToken,
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CorpId = senparcWeixinSetting.WeixinCorpId,
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CorpAgentId = senparcWeixinSetting.WeixinCorpAgentId,
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EncodingAESKey = senparcWeixinSetting.WeixinCorpEncodingAESKey,
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Signature = context.Request.Query["signature"],
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Timestamp = context.Request.Query["timestamp"],
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Nonce = context.Request.Query["nonce"],
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Msg_Signature = context.Request.Query["msg_signature"],
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};
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return postModel;
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}
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}
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/// <summary>
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/// 公众号 MessageHandlerMiddleware 扩展类，用于提供简洁的注册过程
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/// </summary>
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public static class MessageHandlerMiddlewareExtension
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{
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/* 用法：
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startup.cs 中 Configure() 方法中加入，即可启用自定义的 CustomMessageHandler，无需任何 Controller 和多余代码：
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app.UseMpMessageHandler("/WeixinAsync", CustomMessageHandler.GenerateMessageHandler, o => o.AccountSettingFunc = c => senparcWeixinSetting.Value);
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);
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*/
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/// <summary>
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/// 使用 MessageHandler 配置。注意：会默认使用异步方法 messageHandler.ExecuteAsync()。
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/// </summary>
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/// <param name="builder"></param>
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/// <param name="pathMatch">路径规则（路径开头，可带参数），此路径用于提供微信后台 Url 校验及消息推送</param>
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/// <param name="messageHandler"></param>
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/// <param name="options"></param>
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/// <returns></returns>
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public static IApplicationBuilder UseMessageHandlerForWork<TMC>(this IApplicationBuilder builder, PathString pathMatch,
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Func<Stream, PostModel, int, IServiceProvider, MessageHandler<TMC, IWorkRequestMessageBase, IWorkResponseMessageBase>> messageHandler,
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Action<MessageHandlerMiddlewareOptions<ISenparcWeixinSettingForWork>> options)
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where TMC : DefaultWorkMessageContext, IMessageContext<IWorkRequestMessageBase, IWorkResponseMessageBase>, new()
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{
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return builder.UseMessageHandler<WorkMessageHandlerMiddleware<TMC>, IWorkRequestMessageBase, IWorkResponseMessageBase, TMC, PostModel, ISenparcWeixinSettingForWork>(pathMatch, messageHandler, options);
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}
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}
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#region 证明泛型可以用在中间件中
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//public class TestWM<T>
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// where T : class
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//{
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// protected readonly RequestDelegate _next;
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// protected readonly T _t;
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// public TestWM(RequestDelegate next, T t)
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// {
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// _next = next;
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// _t = t;
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// }
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// public async Task Invoke(HttpContext context)
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// {
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// await context.Response.WriteAsync(_t.GetType().Name);
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// }
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//}
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//public static class TestWMExtension
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//{
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// public static IApplicationBuilder UseTestWM<T>(this IApplicationBuilder builder, T t)
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// where T : class
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// {
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// return builder.UseMiddleware<TestWM<T>>(t);
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// }
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//}
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#endregion
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}
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#endif
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