MeiSaiSiXieTongApi/MyCode.Project.WebApi/Areas/Wechat/Controllers/WeController.cs

using Newtonsoft.Json.Linq;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Web.Http;
using MyCode.Project.Domain.Message.Response.User;
using MyCode.Project.Infrastructure.Constant;
using MyCode.Project.WebApi.Controllers;
using MyCode.Project.Domain.Config;
using MyCode.Project.Services;
using MyCode.Project.Infrastructure.Common;
using MyCode.Project.Domain.Message.Request.User;
using MyCode.Project.Infrastructure.Enumeration;
using MyCode.Project.WebApi.App_Filter;
using System.Web;
using System.IO;
using System.Text;
using System.Xml;
using Senparc.Weixin.MP;
using Senparc.Weixin.MP.MessageHandlers;
using Senparc.NeuChar.Context;
using Senparc.NeuChar.Entities;
using System.Xml.Linq;
using MyCode.Project.Services.CustomMessageHandler;
using MyCode.Project.Domain.Dtos.Common;
using MyCode.Project.Domain.Message.Response.Wechat;
using MyCode.Project.Infrastructure.Cache;
using MyCode.Project.Infrastructure.Exceptions;

namespace MyCode.Project.WebApi.Areas.Wechat.Controllers
{
    public class WeController : BaseWechatController
    {

        private readonly IMyCodeCacheService _myCodeCacheService;
        private IMemberService _memberService;

        public WeController(IMyCodeCacheService myCodeCacheService
            , IMemberService memberService)
        {
            _myCodeCacheService = myCodeCacheService;
            _memberService = memberService;
        }

        #region WeCallBack(微信回调)
        /// <summary>
        /// 微信回调1
        /// </summary>
        [AllowAnonymous, IgnoreResultHandle, HttpGet, HttpPost, ActionName("WeCallBack")]

        public void WeCallBack()
        {
            var context = CurrentHttpContext;
            string signature = context.Request["signature"];
            string timestamp = context.Request["timestamp"];
            string nonce = context.Request["nonce"];
            string echostr = context.Request["echostr"];

            //get method -检验是否微信的回调，不是则不执行
            if (CheckSignature.Check(signature, timestamp, nonce, SystemConfig.WeToken))
            {
                //                string postStr = @" <xml><ToUserName><![CDATA[gh_9022339a2c40]]></ToUserName>
                //<FromUserName><![CDATA[onGWJs5LvcR2NbYMJF2VyRhVH9XU]]></FromUserName>
                //<CreateTime>1576747572</CreateTime>
                //<MsgType><![CDATA[event]]></MsgType>
                //<Event><![CDATA[subscribe]]></Event>
                //<EventKey><![CDATA[]]></EventKey>
                //</xml>";
                Stream s = System.Web.HttpContext.Current.Request.InputStream;//此方法是对System.Web.HttpContext.Current.Request.InputStream的封装，可直接代码
                string postStr = "";
                if (s != null && s.Length > 0)
                {
                    s.Position = 0; //当你读取完之后必须把stream的读取位置设为开始
                    StreamReader reader = new StreamReader(s, System.Text.Encoding.UTF8);
                    postStr = reader.ReadToEnd().ToString();
                }

                //byte[] b = new byte[s.Length];
                //s.Read(b, 0, (int)s.Length);
                //string postStr = Encoding.UTF8.GetString(b);
                //LogHelper.Info(postStr);

                var weixinContext = MessageHandler<MessageContext<IRequestMessageBase, IResponseMessageBase>>.GlobalWeixinContext.MessageQueue.FirstOrDefault();
                var recordCount = MessageHandler<MessageContext<IRequestMessageBase, IResponseMessageBase>>.GlobalWeixinContext.MaxRecordCount;
                if (string.IsNullOrEmpty(postStr))
                {
                    context.Response.Output.Write(echostr);
                    context.Response.End();
                    return;
                }
                var doc = XDocument.Parse(postStr);
                var maxRecordCount = 1;
                var messageHandler = new CustomMessageHandler(doc, null, maxRecordCount);
                messageHandler.OmitRepeatedMessage = true;
                messageHandler.Execute();

                //LogHelper.Info("RequestMessages:" + messageHandler.RequestMessage);
                if (messageHandler.TextResponseMessage != null)
                {
                    //LogHelper.Info("ResponseMessages:" + messageHandler.TextResponseMessage);                  
                    context.Response.Output.Write(messageHandler.TextResponseMessage);
                    context.Response.End();
                }
            }
            return;
        }
        #endregion

        #region 接收消息
        /// <summary>
        /// 接收微信发送的XML消息并且解析
        /// </summary>
        private void ReceiveXml()
        {
            Stream requestStream = System.Web.HttpContext.Current.Request.InputStream;
            byte[] requestByte = new byte[requestStream.Length];
            requestStream.Read(requestByte, 0, (int)requestStream.Length);
            string requestStr = Encoding.UTF8.GetString(requestByte);

            if (!string.IsNullOrEmpty(requestStr))
            {
                //封装请求类
                XmlDocument requestDocXml = new XmlDocument();
                requestDocXml.LoadXml(requestStr);
                XmlElement rootElement = requestDocXml.DocumentElement;
                WxXmlModel WxXmlModel2 = new WxXmlModel();
                WxXmlModel2.ToUserName = rootElement.SelectSingleNode("ToUserName").InnerText;
                WxXmlModel2.FromUserName = rootElement.SelectSingleNode("FromUserName").InnerText;
                WxXmlModel2.CreateTime = rootElement.SelectSingleNode("CreateTime").InnerText;
                WxXmlModel2.MsgType = rootElement.SelectSingleNode("MsgType").InnerText;

                switch (WxXmlModel2.MsgType)
                {
                    case "text"://文本
                        WxXmlModel2.Content = rootElement.SelectSingleNode("Content").InnerText;
                        break;
                    case "image"://图片
                        WxXmlModel2.PicUrl = rootElement.SelectSingleNode("PicUrl").InnerText;
                        break;
                    case "event"://事件
                        WxXmlModel2.Event = rootElement.SelectSingleNode("Event").InnerText;
                        if (WxXmlModel2.Event != "TEMPLATESENDJOBFINISH")//关注类型
                        {
                            WxXmlModel2.EventKey = rootElement.SelectSingleNode("EventKey").InnerText;
                        }
                        break;
                    default:
                        break;
                }

                ResponseXML(WxXmlModel2);//回复消息
            }
        }
        #endregion

        #region 回复消息
        private void ResponseXML(WxXmlModel WxXmlModel)
        {
            QrCodeApi QrCodeApi = new QrCodeApi();

            string XML = "";
            switch (WxXmlModel.MsgType)
            {
                case "text"://文本回复
                    XML = MyCode.Project.Infrastructure.Common.ResponseMessage.GetText(WxXmlModel.FromUserName, WxXmlModel.ToUserName, WxXmlModel.Content);
                    break;
                case "event":
                    switch (WxXmlModel.Event)
                    {
                        case "subscribe":
                            if (string.IsNullOrEmpty(WxXmlModel.EventKey))
                            {
                                XML = MyCode.Project.Infrastructure.Common.ResponseMessage.GetText(WxXmlModel.FromUserName, WxXmlModel.ToUserName, "关注成功");
                            }
                            else
                            {
                                XML = MyCode.Project.Infrastructure.Common.ResponseMessage.SubScanQrcode(WxXmlModel.FromUserName, WxXmlModel.ToUserName, WxXmlModel.EventKey);//扫描带参数二维码先关注后推送事件
                            }
                            break;
                        case "SCAN":
                            XML = MyCode.Project.Infrastructure.Common.ResponseMessage.ScanQrcode(WxXmlModel.FromUserName, WxXmlModel.ToUserName, WxXmlModel.EventKey);//扫描带参数二维码已关注 直接推送事件
                            break;
                    }
                    break;
                default://默认回复
                    break;
            }
            HttpContext.Current.Response.Write(XML);
            HttpContext.Current.Response.End();
        }
        #endregion

        #region OpenId(获取OpenId，授权自动跳转；)
        /// <summary>
        /// H5授权token，获取OpenId，授权自动跳转；
        /// </summary>
        [AllowAnonymous, IgnoreResultHandle, HttpGet, HttpPost, ActionName("openid")]
        public void OpenId(string url, int? introcode = null)
        {
            //拿到code后的跳转链接
            var redirectUrl = $"{SystemConfig.WeixinApiUrl}/api/Wechat/We/UserInfoCallback";

            var openIdResp = new OpenIdResp();

            var tempCacheKey = Guid.NewGuid();
            
            //解码
            url = HttpUtility.UrlDecode(url);

            //授权成功之后的跳转链接
            openIdResp.RedirectUrl = url;

         

            _myCodeCacheService.Set(tempCacheKey.ToString(), openIdResp);

            //执行跳转链接，userinfo跳转
            var weixinOAuth2Url = $"https://open.weixin.qq.com/connect/oauth2/authorize?appid={SystemConfig.WeAppid}&redirect_uri={HttpUtility.UrlEncode(redirectUrl)}&response_type=code&scope=snsapi_userinfo&state={tempCacheKey}#wechat_redirect";

            CurrentHttpContext.Response.Redirect(weixinOAuth2Url);

        }
        #endregion

        #region UserInfoCallback(带用户信息的回调)
        [AllowAnonymous, IgnoreResultHandle, HttpGet, HttpPost, ActionName("UserInfoCallback")]
        public void UserInfoCallback(string code, string state)
        {
            if (string.IsNullOrEmpty(code)) { throw new BaseException("code为空"); }

            var redirectUrl = _memberService.GetWXOAuthRedirectUrlByUserInfo(state, code);

            CurrentHttpContext.Response.Redirect(redirectUrl);
        }
        #endregion

    }
}