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.NET CORE3.1实现微信小程序发送订阅消息

2021-04-18 19:22:05ASP.NET人已围观

简介 一、appsettings.json定义小程序配置信息


"WX": {
  "AppId": "wx88822730803edd44",
  "AppSecret": "75b269042e8b5026e6ed14aa24ba9

一、appsettings.json定义小程序配置信息

"WX": {
  "AppId": "wx88822730803edd44",
  "AppSecret": "75b269042e8b5026e6ed14aa24ba9353",
  "Templates": {
  "Audit": {
    "TemplateId": "aBaIjTsPBluYtj2tzotzpowsDDBGLhXQkwrScupnQsM",
    "PageUrl": "/pages/index/formAudit?formId={0}&tableId={1}",
    "MiniprogramState": "developer",
    "Lang": "zh_TW",
    "Data": {
        "Title": "thing6",
        "Content": "thing19",
        "Date": "date9"
      }
    }
  },
  "SignatureToken": "aaaaaa",
  "MessageSendUrl": "https://api.weixin.qq.com/cgi-bin/message/subscribe/send?access_token={0}",
  "AccessTokenUrl": "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid={0}&secret={1}"
}

二、编写通用类加载配置

using System;
using System.Text;
using System.Security.Cryptography;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Configuration.Json;

namespace WXERP.Services
{
  /// <summary>
  /// 项目公有静态类
  /// </summary>
  public class Common
  {
    /// <summary>
    /// 獲取根目錄
    /// </summary>
    public static string AppRoot => Environment.CurrentDirectory;// AppContext.BaseDirectory;
    /// <summary>
    /// 獲取項目配置
    /// </summary>
    public static IConfiguration Configuration { get; set; }
    /// <summary>
    /// 加載項目配置
    /// </summary>
    static Common()
    {
      Configuration = new ConfigurationBuilder()
      .Add(new JsonConfigurationSource
      {
        Path = "appsettings.json",
        ReloadOnChange = true //当appsettings.json被修改时重新加载 
      })
      .Build();
    }

    /// <summary>
    /// SHA1加密
    /// </summary>
    /// <param name="content">需要加密的字符串</param>
    /// <returns>返回40位大寫字符串</returns>
    public static string SHA1(string content)
    {
      try
      {
        SHA1 sha1 = new SHA1CryptoServiceProvider();
        byte[] bytes_in = Encoding.UTF8.GetBytes(content);
        byte[] bytes_out = sha1.ComputeHash(bytes_in);
        sha1.Dispose();
        string result = BitConverter.ToString(bytes_out);
        result = result.Replace("-", "");
        return result;
      }
      catch (Exception ex)
      {
        throw new Exception("Error in SHA1: " + ex.Message);
      }
    }

  }
}

三、编写HttpHelper请求类

using System;
using System.Text;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Threading.Tasks;
using System.Collections.Generic;

namespace WXERP.Services
{
  /// <summary>
  /// HTTP請求輔助類
  /// </summary>
  public class HttpHelper
  {
    /// <summary>
    /// post同步請求
    /// </summary>
    /// <param name="url">地址</param>
    /// <param name="postData">數據</param>
    /// <param name="contentType">application/xml、application/json、application/text、application/x-www-form-urlencoded</param>
    /// <param name="headers">請求頭</param> 
    /// <returns></returns>
    public static string HttpPost(string url, string postData = null, string contentType = null, Dictionary<string, string> headers = null)
    {
      using HttpClient client = new HttpClient();

      if (headers != null)
      {
        foreach (var header in headers)
        client.DefaultRequestHeaders.Add(header.Key, header.Value);
      }

      postData ??= "";
      using HttpContent httpContent = new StringContent(postData, Encoding.UTF8);
      if (contentType != null)
      httpContent.Headers.ContentType = new MediaTypeHeaderValue(contentType);

      HttpResponseMessage response = client.PostAsync(url, httpContent).Result;
      return response.Content.ReadAsStringAsync().Result;
    }

    /// <summary>
    /// post異步請求
    /// </summary>
    /// <param name="url">地址</param>
    /// <param name="postData">數據</param>
    /// <param name="contentType">application/xml、application/json、application/text、application/x-www-form-urlencoded</param>
    /// <param name="timeOut">請求超時時間</param> 
    /// <param name="headers">請求頭</param> 
    /// <returns></returns>
    public static async Task<string> HttpPostAsync(string url, string postData = null, string contentType = null, int timeOut = 30, Dictionary<string, string> headers = null)
    {
      using HttpClient client = new HttpClient();
      client.Timeout = new TimeSpan(0, 0, timeOut);

      if (headers != null)
      {
        foreach (var header in headers)
        client.DefaultRequestHeaders.Add(header.Key, header.Value);
      }

      postData ??= "";
      using HttpContent httpContent = new StringContent(postData, Encoding.UTF8);
      if (contentType != null)
        httpContent.Headers.ContentType = new MediaTypeHeaderValue(contentType);

      HttpResponseMessage response = await client.PostAsync(url, httpContent);
      return await response.Content.ReadAsStringAsync();
    }

    /// <summary>
    /// get同步請求
    /// </summary>
    /// <param name="url">地址</param>
    /// <param name="headers">請求頭</param>
    /// <returns></returns>
    public static string HttpGet(string url, Dictionary<string, string> headers = null)
    {
      using HttpClient client = new HttpClient();

      if (headers != null)
      {
        foreach (var header in headers)
        client.DefaultRequestHeaders.Add(header.Key, header.Value);
      }

      HttpResponseMessage response = client.GetAsync(url).Result;
      return response.Content.ReadAsStringAsync().Result;
    }

    /// <summary>
    /// get異步請求
    /// </summary>
    /// <param name="url"></param>
    /// <param name="headers"></param>
    /// <returns></returns>
    public static async Task<string> HttpGetAsync(string url, Dictionary<string, string> headers = null)
    {
      using HttpClient client = new HttpClient();

      if (headers != null)
      {
        foreach (var header in headers)
        client.DefaultRequestHeaders.Add(header.Key, header.Value);
      }

      HttpResponseMessage response = await client.GetAsync(url);
      return await response.Content.ReadAsStringAsync();
    }

  }
}

四、在sqlserver下存储并获取openid,这个主要是因为提交消息并不是在微信小程序端,如果是在微信小程序上发起订阅消息,可以忽略这个步骤

// 创建数据库表

create table TBSF_Conmmunicate_WXUser
(
  ID int identity(1,1) primary key,
  Staff_ID varchar(10),
  OpenId varchar(50),
  SessionKey varchar(50),
  UnionId varchar(50),
  IsValid bit,
)

// SqlHelper数据库辅助类来自于CommunicationOperateDBUtility,可以自己编写

using System.Data;
using System.Text;
using CommunicationOperateDBUtility;

namespace WXERP.Services.CommunicationOperateDAL
{
  /// <summary>
  /// 微信信息
  /// </summary>
  public class WXInforDeal
  {
    private SqlHelper sqlHelper = null;
    /// <summary>
    /// 初始化數據庫輔助對象
    /// </summary>
    /// <param name="con"></param>
    public WXInforDeal(object con)
    {
      sqlHelper = new SqlHelper(con);
    }
    /// <summary>
    /// 獲取微信登陸用戶信息
    /// </summary>
    /// <param name="staffIdList">工號</param>
    /// <returns></returns>
    public DataSet GetLoginUserInfo(string staffIdList)
    {
      DataSet ds = new DataSet();
      StringBuilder stringBuilder = new StringBuilder();
      stringBuilder.Append(" SELECT distinct OpenId FROM ");
      stringBuilder.Append(" TBSF_Conmmunicate_WXUser WHERE Staff_ID IN (");
      stringBuilder.Append(staffIdList);
      stringBuilder.Append(")");
      string strSql = stringBuilder.ToString();
      sqlHelper.DBRunSql(strSql, ref ds);
      return ds;
    }
  }
}

五、编写订阅消息基类模型

using System;
using System.Data;
using Newtonsoft.Json;
using System.Collections.Generic;
using WXERP.Services.CommunicationOperateDAL;

namespace WXERP.Models
{
  /// <summary>
  /// 訂閲消息請求模型
  /// </summary>
  public class SubscribeMessageModel
  {
    /// <summary>
    /// 初始化審核訂閲消息
    /// </summary>
    /// <param name="dbTransOrCnn">數據庫事務</param>
    /// <param name="nextAuditStaffId">下一個審核通知用戶工號</param>
    public SubscribeMessageModel(object dbTransOrCnn, string nextAuditStaffId)
    {
      WXInforDeal wxInfoDeal = new WXInforDeal(dbTransOrCnn);
      DataSet wxUserInfo = wxInfoDeal.GetLoginUserInfo(nextAuditStaffId);
      if (wxUserInfo != null && wxUserInfo.Tables.Count > 0 && wxUserInfo.Tables[0].Rows.Count > 0)
      {
        Touser = wxUserInfo.Tables[0].Rows[0]["OpenId"].ToString();
      }
    }
    /// <summary>
    /// 消息接收者的openid
    /// </summary>
    [JsonProperty("touser")]
    public string Touser { get; set; }
    /// <summary>
    /// 消息模板ID
    /// </summary>
    [JsonProperty("template_id")]
    public string TemplateId { get; set; }
    /// <summary>
    /// 點擊模板卡片后的跳轉頁面,僅限本小程序内的頁面,支持帶參數(示例index?foo=bar),該字段不填則不跳轉
    /// </summary>
    [JsonProperty("page")]
    public string Page { get; set; }
    /// <summary>
    /// 跳轉小程序類型:developer開發版、trial體驗版、formal正式版,默认为正式版
    /// </summary>
    [JsonProperty("miniprogram_state")]
    public string MiniprogramState { get; set; }
    /// <summary>
    /// 進入小程序查看的語言類型,支持zh_CN(簡體中文)、en_US(英文)、zh_HK(繁體中文)、zh_TW(繁體中文),默認為zh_CN
    /// </summary>
    [JsonProperty("lang")]
    public string Lang { get; set; }
    /// <summary>
    /// 模板内容
    /// </summary>
    [JsonProperty("data")]
    public Dictionary<string, DataValue> Data { get; set; }
  }
  /// <summary>
  /// 模板内容關鍵字
  /// </summary>
  public class DataValue
  {
    /// <summary>
    /// 訂閲消息參數值
    /// </summary>
    [JsonProperty("value")]
    public string Value { get; set; }
  }

  /// <summary>
  /// 小程序訂閲消息響應模型
  /// </summary>
  public class SubscribeMsgResponseModel
  {
    /// <summary>
    /// 錯誤代碼
    /// </summary>
    public int Errcode { get; set; }
    /// <summary>
    /// 錯誤信息
    /// </summary>
    public string Errmsg { get; set; }
  }

  /// <summary>
  /// 小程序獲取token響應模型
  /// </summary>
  public class AccessTokenResponseModel
  {
    /// <summary>
    /// 小程序訪問token
    /// </summary>
    public string Access_token { get; set; }
    /// <summary>
    /// Token過期時間,單位秒
    /// </summary>
    public int Expires_id { get; set; }
    /// <summary>
    /// Token創建時間
    /// </summary>
    public DateTime Create_time { get; set; }
    /// <summary>
    /// 刷新以後的Token
    /// </summary>
    public string Refresh_token { get; set; }
    /// <summary>
    /// 小程序用戶唯一標識,如果用戶未關注公衆號,訪問公衆號網頁也會產生
      /// </summary>
    public string Openid { get; set; }
    /// <summary>
    /// 用戶授權的作用域,使用逗號分隔
    /// </summary>
    public string Scope { get; set; }
  }

}

六、实现消息订阅基类,下面的SetTemplateData方法根据自己的情况设置需要推送消息的内容,如果以后有其他订阅消息模板,新增一个类实现SubscribeMessageModel

using System;
using System.Collections.Generic;
using Newtonsoft.Json;
using BestSoft.Common.Resources;
using BSFWorkFlow.Common.GeneralUtility;
using WXERP.Models;

namespace WXERP.Services.SubscribeMessage
{
  /// <summary>
  /// 審核訂閲消息
  /// </summary>
  public class AuditSubscribeMessage : SubscribeMessageModel
  {
    private string page;
    private string lang;
    private Dictionary<string, DataValue> data;
    /// <summary>
    /// 設置小程序OpenId
    /// </summary>
    /// <param name="dbTransOrCnn">數據庫事務</param>
    /// <param name="nextAuditStaffId">下一個審核通知用戶工號</param>
    public AuditSubscribeMessage(object dbTransOrCnn, string nextAuditStaffId)
    : base(dbTransOrCnn, nextAuditStaffId)
    {

    }
    /// <summary>
    /// 消息模板ID
    /// </summary>
    [JsonProperty("template_id")]
    public new string TemplateId => Common.Configuration["WX:Templates:Audit:TemplateId"];

    /// <summary>
    /// 設置小程序訂閲消息跳轉頁面
    /// </summary>
    /// <param name="formId"></param>
    /// <param name="tableId"></param>
    public void SetPageUrl(string formId, string tableId)
    {
      Page = string.Format(Common.Configuration["WX:Templates:Audit:PageUrl"],
      formId, tableId);
    }
    /// <summary>
    /// 點擊模板卡片后的跳轉頁面
    /// </summary>
    [JsonProperty("page")]
    public new string Page
    {
      get
      {
        return page;
      }
      set
      {
        page = value;
        return;
      }
    }
    /// <summary>
    /// 跳轉小程序類型
    /// </summary>
    [JsonProperty("miniprogram_state")]
    public new string MiniprogramState => Common.Configuration["WX:Templates:Audit:MiniprogramState"];
    /// <summary>
    /// 進入小程序查看的語言類型,支持zh_CN(簡體中文)、en_US(英文)、zh_HK(繁體中文)、zh_TW(繁體中文),默認為zh_CN
    /// </summary>
    [JsonProperty("lang")]
    public new string Lang
    {
      get
      {
        lang = Common.Configuration["WX:Templates:Audit:Lang"];
        if (!string.IsNullOrEmpty(MyHttpContext.Current.Request.Headers["bsLanKind"]))
        lang = MyHttpContext.Current.Request.Headers["bsLanKind"];

        return lang;
      }
      set
      {
        lang = value;
        return;
      }
    }
    /// <summary>
    /// 設置審核訂閲消息數據
    /// </summary>
    /// <param name="operation">審核動作:通過、否決、作廢、退回</param>
    /// <param name="itemAuditStatus">審核狀態:1代表審核完畢</param>
    /// <param name="currentWorkflowName">審核標題</param>
    public void SetTemplateData(WFAuditOperation operation, WFAuditItemStatus itemAuditStatus, string currentWorkflowName)
    {
      string tip_msg = "";
      switch (operation)
      {
        case WFAuditOperation.AuditPassAndAgree:
          if (itemAuditStatus == WFAuditItemStatus.SuccessfulToFinishAllAudits)
            tip_msg = GeneralFunction.ReplaceNullOrEmptyStr(SourcesWarehouse.GetStringSources("WFEngine_FinishAuditTip"), "您的單據已審核完成!");
          else
            tip_msg = GeneralFunction.ReplaceNullOrEmptyStr(SourcesWarehouse.GetStringSources("WFEngine_AuditAgreeTip"), "您有一筆新單據待審核!");
        break;
        case WFAuditOperation.AuditPassButDegree:
          tip_msg = GeneralFunction.ReplaceNullOrEmptyStr(SourcesWarehouse.GetStringSources("WFEngine_AuditDegreeTip"), "您提交的單據等待異議!");
        break;
        case WFAuditOperation.AuditAbort:
          tip_msg = GeneralFunction.ReplaceNullOrEmptyStr(SourcesWarehouse.GetStringSources("WFEngine_AuditAbortTip"), "您提交的單據已被作廢!");
        break;
        case WFAuditOperation.AuditBack:
          tip_msg = GeneralFunction.ReplaceNullOrEmptyStr(SourcesWarehouse.GetStringSources("WFEngine_AuditBackTip"), "您提交的單據已被退回修正!");
        break;
      }

      string title = Common.Configuration["WX:Templates:Audit:Data:Title"];
      string content = Common.Configuration["WX:Templates:Audit:Data:Content"];
      string date = Common.Configuration["WX:Templates:Audit:Data:Date"];
      Dictionary<string, DataValue> data = new Dictionary<string, DataValue>()
      {
        {title, new DataValue{ Value= currentWorkflowName }},
        {content, new DataValue{ Value= tip_msg }},
        {date, new DataValue{ Value= DateTime.Now.ToShortDateString() }}
      };

      Data = data;
    }
    /// <summary>
    /// 審核訂閲消息數據
    /// </summary>
    [JsonProperty("data")]
    public new Dictionary<string, DataValue> Data
    {
      get
      {
        return data;
      }
      set
      {
        data = value;
        return;
      }
    }

  }
}

七、编写发送订阅消息,消息推送配置签名认证

using System;
using System.Threading.Tasks;
using System.Collections.Generic;
using Newtonsoft.Json;
using WXERP.Models;

namespace WXERP.Services
{
  /// <summary>
  /// 系統消息上下文
  /// </summary>
  public class MessageContext
  {
    /// <summary>
    /// 獲取AccessToken的全局鎖
    /// </summary>
    private readonly static object SyncLock = new object();

    private static Dictionary<string, AccessTokenResponseModel> tokenCache = new Dictionary<string, AccessTokenResponseModel>();

    /// <summary>
    /// 發送訂閲消息
    /// </summary>
    /// <param name="msg">消息内容</param>
    /// <param name="errMsg">可能由於獲取的token錯誤</param>
    /// <returns></returns>
    public static bool SendSubscribeMsg(SubscribeMessageModel msg, out string errMsg)
    {
      errMsg = "";
      try
      {
        string token = GetAccessToken();
        if (token.Length < 20)
        {
          errMsg = "Failed to send subscription message, Access token error!";
          return false;
        }
        string url = string.Format(Common.Configuration["WX:MessageSendUrl"], token);
        string requestJson = JsonConvert.SerializeObject(msg);
        string responseJson = HttpHelper.HttpPost(url, requestJson, "application/json", null);

        var msgResponse = JsonConvert.DeserializeObject<SubscribeMsgResponseModel>(responseJson);
        if (msgResponse.Errcode != 0)
        {
          errMsg = string.Format("Failed to send subscription message, {0}", msgResponse.Errmsg);
          return false;
        }
      }
      catch (Exception exp)
      {
        throw new Exception("SendSubscribeMsg: " + exp.Message);
      }
      return true;
    }

    /// <summary>
    /// 獲取小程序訪問token
    /// </summary>
    /// <returns></returns>
    private static string GetAccessToken()
    {
      lock (SyncLock)
      {
        string appid = Common.Configuration["WX:AppId"];
        string appsecret = Common.Configuration["WX:AppSecret"];
        string accessTokenUrl = string.Format(Common.Configuration["WX:AccessTokenUrl"], appid, appsecret);

        AccessTokenResponseModel result = null;
        if (tokenCache.ContainsKey(appid))
          result = tokenCache[appid];

        if (result == null)
        {
          string responseJson = HttpHelper.HttpGet(accessTokenUrl, null);
          result = JsonConvert.DeserializeObject<AccessTokenResponseModel>(responseJson);
          result.Create_time = DateTime.Now;
          tokenCache.Add(appid, result);
        }
        else if (DateTime.Compare(result.Create_time.AddSeconds(result.Expires_id), DateTime.Now) < 1)
        {
          string responseJson = HttpHelper.HttpGet(accessTokenUrl, null);
          result = JsonConvert.DeserializeObject<AccessTokenResponseModel>(responseJson);
          result.Create_time = DateTime.Now;
          tokenCache[appid] = result;
        }
        return result.Access_token;
      }
    }

    /// <summary>
    /// 驗證消息來自於微信服務器
    /// </summary>
    /// <param name="signature">微信加密簽名,signature結合了開發者填寫的token、timestamp、nonce</param>
    /// <param name="timestamp">時間戳</param>
    /// <param name="nonce">隨機數</param>
    /// <returns></returns>
    public async Task<bool> CheckSignature(string signature, string timestamp, string nonce)
    {
      string token = Common.Configuration["WX:SignatureToken"];
      string[] tmpArr = { token, timestamp, nonce };
      Array.Sort(tmpArr);
      string tmpStr = string.Join("", tmpArr);
      tmpStr = Common.SHA1(tmpStr);

      if (!tmpStr.Equals(signature, StringComparison.OrdinalIgnoreCase))
        return false;

      await Task.CompletedTask;
      return true;
    }

  }
}

八、编写消息推送配置签名认证控制器

using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;
using WXERP.Services;

namespace WXERP.Controllers
{
  /// <summary>
  /// 消息控制器
  /// </summary>
  [Route("api/[controller]")]
  [ApiController]
  public class MessageController : ControllerBase
  {
    private readonly MessageContext _context;
    /// <summary>
    /// 初始化消息
    /// </summary>
    public MessageController()
    {
      _context = new MessageContext();
    }

    /// <summary>微信消息</summary>
    /// <remarks>驗證消息來自於微信服務器</remarks>
    /// <param name="signature">微信加密簽名,signature結合了開發者填寫的token、timestamp、nonce</param>
    /// <param name="timestamp">時間戳</param>
    /// <param name="nonce">隨機數</param>
    /// <param name="echostr">隨機字符串</param>
    /// <returns></returns>
    [HttpGet("checkSignature")]
    [AllowAnonymous]
    public async void CheckSignature(string signature,string timestamp,string nonce,string echostr)
    {
      bool result = await _context.CheckSignature(signature, timestamp, nonce);
      if (result)
      {
        HttpContext.Response.ContentType = "text/plain; charset=utf-8";
        await HttpContext.Response.WriteAsync(echostr);
      }
      else
      {
        HttpContext.Response.StatusCode = 409;
        HttpContext.Response.ContentType = "text/plain; charset=utf-8";
        await HttpContext.Response.WriteAsync("error");
      }
    }

  }
}

九、调用小程序订阅消息,需要自己实现其他逻辑

//@iFormSaveDAL.GetTran 数据库链接事务,如果发送消息失败,应该回滚提交的表单数据
//@wFControl.NextAuditNotifyStaffIDStr 下一个审核用户的工号
//@auditPageData.FormID 表单编号
//@auditPageData.MainRecordID 表单数据ID
//@operationByCode 一个枚举类型,前端传递的:审核通过、作废、退回等
//@wFControl.ItemAuditStatus 一个枚举类型,如果全部审核完毕为1,否则为0
//@wFControl.CurrentWorkflowName 当前流程的名称,例如:请假单审核
//@SaveAfterInfo 全局字符变量,用于保存结果信息

AuditSubscribeMessage auditMsg = new AuditSubscribeMessage(iFormSaveDAL.GetTran, wFControl.NextAuditNotifyStaffIDStr);
auditMsg.SetPageUrl(auditPageData.FormID, auditPageData.MainRecordID);
auditMsg.SetTemplateData(operationByCode, wFControl.ItemAuditStatus, wFControl.CurrentWorkflowName);
if (!string.IsNullOrEmpty(auditMsg.Touser))
{
  if (!MessageContext.SendSubscribeMsg(auditMsg, out messageStr))
  {
    SaveAfterInfo = messageStr;
    return false;
  }
}

到此这篇关于.NET CORE3.1实现微信小程序发送订阅消息的文章就介绍到这了,更多相关.NET CORE 小程序发送订阅内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家!

文章来源:https://www.jb51.net/article/196443.htm

Tags:.NET   CORE   小程序   .NET   CORE   小程序订阅  

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