主頁(yè) > 知識(shí)庫(kù) > .NET微信公眾號(hào)開發(fā)之公眾號(hào)消息處理

.NET微信公眾號(hào)開發(fā)之公眾號(hào)消息處理

一.前言

微信公眾平臺(tái)的消息處理還是比較完善的，有最基本的文本消息，到圖文消息，到圖片消息，語(yǔ)音消息，視頻消息，音樂(lè)消息其基本原理都是一樣的，只不過(guò)所post的xml數(shù)據(jù)有所差別，在處理消息之前，我們要認(rèn)真閱讀，官方給我們的文檔：http://mp.weixin.qq.com/wiki/14/89b871b5466b19b3efa4ada8e577d45e.html。首先我們從最基本的文本消息處理開始。

xml>
ToUserName>![CDATA[toUser]]>/ToUserName>
FromUserName>![CDATA[fromUser]]>/FromUserName>
CreateTime>12345678/CreateTime>
MsgType>![CDATA[text]]>/MsgType>
Content>![CDATA[你好]]>/Content>
/xml>

我們可以看到這是消息處理的一個(gè)最基本的模式，有發(fā)送者，接受者，創(chuàng)建時(shí)間，類型，內(nèi)容等等。

首先我們來(lái)創(chuàng)建一個(gè)消息處理的類，這個(gè)類用來(lái)捕獲，所有的消息請(qǐng)求，根據(jù)不同的消息請(qǐng)求類型來(lái)處理不同的消息回復(fù)。

public class WeiXinService
  {
    /// summary>
    /// TOKEN
    /// /summary>
    private const string TOKEN = "finder";
    /// summary>
    /// 簽名
    /// /summary>
    private const string SIGNATURE = "signature";
    /// summary>
    /// 時(shí)間戳
    /// /summary>
    private const string TIMESTAMP = "timestamp";
    /// summary>
    /// 隨機(jī)數(shù)
    /// /summary>
    private const string NONCE = "nonce";
    /// summary>
    /// 隨機(jī)字符串
    /// /summary>
    private const string ECHOSTR = "echostr";
    /// summary>
    /// 
    /// /summary>
    private HttpRequest Request { get; set; }
    /// summary>
    /// 構(gòu)造函數(shù)
    /// /summary>
    /// param name="request">/param>
    public WeiXinService(HttpRequest request)
    {
      this.Request = request;
    }
    /// summary>
    /// 處理請(qǐng)求，產(chǎn)生響應(yīng)
    /// /summary>
    /// returns>/returns>
    public string Response()
    {
      string method = Request.HttpMethod.ToUpper();
      //驗(yàn)證簽名
      if (method == "GET")
      {
        if (CheckSignature())
        {
          return Request.QueryString[ECHOSTR];
        }
        else
        {
          return "error";
        }
      }

      //處理消息
      if (method == "POST")
      {
        return ResponseMsg();
      }
      else
      {
        return "無(wú)法處理";
      }
    }

    /// summary>
    /// 處理請(qǐng)求
    /// /summary>
    /// returns>/returns>
    private string ResponseMsg()
    {
      string requestXml = CommonWeiXin.ReadRequest(this.Request);
      IHandler handler = HandlerFactory.CreateHandler(requestXml);
   
      if (handler != null)
      {
        return handler.HandleRequest();
      }

      return string.Empty;
    }
    /// summary>
    /// 檢查簽名
    /// /summary>
    /// param name="request">/param>
    /// returns>/returns>
    private bool CheckSignature()
    {
      string signature = Request.QueryString[SIGNATURE];
      string timestamp = Request.QueryString[TIMESTAMP];
      string nonce = Request.QueryString[NONCE];

      Liststring> list = new Liststring>();
      list.Add(TOKEN);
      list.Add(timestamp);
      list.Add(nonce);
      //排序
      list.Sort();
      //拼串
      string input = string.Empty;
      foreach (var item in list)
      {
        input += item;
      }
      //加密
      string new_signature = SecurityUtility.SHA1Encrypt(input);
      //驗(yàn)證
      if (new_signature == signature)
      {
        return true;
      }
      else
      {
        return false;
      }
    }
  }

在來(lái)看看我們的首先是如何捕獲消息的。首頁(yè)Default.ashx的代碼如下

    public void ProcessRequest(HttpContext context)
    {
      context.Response.ContentType = "text/html";
      

      string postString = string.Empty;
      if (HttpContext.Current.Request.HttpMethod.ToUpper() == "POST")
      {
        //由微信服務(wù)接收請(qǐng)求，具體處理請(qǐng)求
        WeiXinService wxService = new WeiXinService(context.Request);
        string responseMsg = wxService.Response();
        context.Response.Clear();
        context.Response.Charset = "UTF-8";
        context.Response.Write(responseMsg);
        context.Response.End();
      }
      else
      {
        string token = "wei2414201";
        if (string.IsNullOrEmpty(token))
        {
          return;
        }

        string echoString = HttpContext.Current.Request.QueryString["echoStr"];
        string signature = HttpContext.Current.Request.QueryString["signature"];
        string timestamp = HttpContext.Current.Request.QueryString["timestamp"];
        string nonce = HttpContext.Current.Request.QueryString["nonce"];

        if (!string.IsNullOrEmpty(echoString))
        {
          HttpContext.Current.Response.Write(echoString);
          HttpContext.Current.Response.End();
        }
      }


    }

從上面的代碼中我們可以看到WeiXinService.cs類中的消息相應(yīng)至關(guān)重要。

    /// summary>
    /// 處理請(qǐng)求
    /// /summary>
    /// returns>/returns>
    private string ResponseMsg()
    {
      string requestXml = CommonWeiXin.ReadRequest(this.Request);
      IHandler handler = HandlerFactory.CreateHandler(requestXml);
   
      if (handler != null)
      {
        return handler.HandleRequest();
      }

      return string.Empty;
    }

IHandler是一個(gè)消息處理接口，其下面有EventHandler，TextHandler處理類實(shí)現(xiàn)這個(gè)接口。代碼如下

  /// summary>
  /// 處理接口
  /// /summary>
  public interface IHandler
  {
    /// summary>
    /// 處理請(qǐng)求
    /// /summary>
    /// returns>/returns>
    string HandleRequest();
  }

EventHandler

class EventHandler : IHandler
  {
    /// summary>
    /// 請(qǐng)求的xml
    /// /summary>
    private string RequestXml { get; set; }
    /// summary>
    /// 構(gòu)造函數(shù)
    /// /summary>
    /// param name="requestXml">/param>
    public EventHandler(string requestXml)
    {
      this.RequestXml = requestXml;
    }
    /// summary>
    /// 處理請(qǐng)求
    /// /summary>
    /// returns>/returns>
    public string HandleRequest()
    {
      string response = string.Empty;
      EventMessage em = EventMessage.LoadFromXml(RequestXml);
      if (em.Event.Equals("subscribe", StringComparison.OrdinalIgnoreCase))//用來(lái)判斷是不是首次關(guān)注
      {


        PicTextMessage tm = new PicTextMessage();//我自己創(chuàng)建的一個(gè)圖文消息處理類
        tm.ToUserName = em.FromUserName;
        tm.FromUserName = em.ToUserName;
        tm.CreateTime = CommonWeiXin.GetNowTime();
        response = tm.GenerateContent();

      }

      return response;
    }
  }

TextHandler

  /// summary>
  /// 文本信息處理類
  /// /summary>
  public class TextHandler : IHandler
  {
    string openid { get; set; }
    string access_token { get; set; }

    /// summary>
    /// 請(qǐng)求的XML
    /// /summary>
    private string RequestXml { get; set; }
    /// summary>
    /// 構(gòu)造函數(shù)
    /// /summary>
    /// param name="requestXml">請(qǐng)求的xml/param>
    public TextHandler(string requestXml)
    {
      this.RequestXml = requestXml;
    }
    /// summary>
    /// 處理請(qǐng)求
    /// /summary>
    /// returns>/returns>
    public string HandleRequest()
    {
      string response = string.Empty;
      TextMessage tm = TextMessage.LoadFromXml(RequestXml);
      string content = tm.Content.Trim();
      if (string.IsNullOrEmpty(content))
      {
        response = "您什么都沒(méi)輸入，沒(méi)法幫您啊。";
      }
      else
      {
          string username = System.Configuration.ConfigurationManager.AppSettings["weixinid"].ToString();
          AccessToken token = AccessToken.Get(username);
          access_token = token.access_token;
          openid = tm.FromUserName;
          response = HandleOther(content);
        
      }
      tm.Content = response;
      //進(jìn)行發(fā)送者、接收者轉(zhuǎn)換
      string temp = tm.ToUserName;
      tm.ToUserName = tm.FromUserName;
      tm.FromUserName = temp;
      response = tm.GenerateContent();
      return response;
    }
    /// summary>
    /// 處理其他消息
    /// /summary>
    /// param name="tm">/param>
    /// returns>/returns>
    private string HandleOther(string requestContent)
    {
      string response = string.Empty;
      if (requestContent.Contains("你好") || requestContent.Contains("您好"))
      {
        response = "您也好~";
      }else if (requestContent.Contains("openid") || requestContent.Contains("id") || requestContent.Contains("ID"))//用來(lái)匹配用戶輸入的關(guān)鍵字
      {
        response = "你的Openid: "+openid;
      }
      else if (requestContent.Contains("token") || requestContent.Contains("access_token"))
      {
        response = "你的access_token: " + access_token;
      }else 
      {
        response = "試試其他關(guān)鍵字吧。";
      }
      return response;
    }
  }

HandlerFactory

  /// summary>
  /// 處理器工廠類
  /// /summary>
  public class HandlerFactory
  {
    /// summary>
    /// 創(chuàng)建處理器
    /// /summary>
    /// param name="requestXml">請(qǐng)求的xml/param>
    /// returns>IHandler對(duì)象/returns>
    public static IHandler CreateHandler(string requestXml)
    {
      IHandler handler = null;
      if (!string.IsNullOrEmpty(requestXml))
      {
        //解析數(shù)據(jù)
        XmlDocument doc = new System.Xml.XmlDocument();
        doc.LoadXml(requestXml);
        XmlNode node = doc.SelectSingleNode("/xml/MsgType");
        if (node != null)
        {
          XmlCDataSection section = node.FirstChild as XmlCDataSection;
          if (section != null)
          {
            string msgType = section.Value;

            switch (msgType)
            {
              case "text":
                handler = new TextHandler(requestXml);
                break;
              case "event":
                handler = new EventHandler(requestXml);
                break;
            }
          }
        }
      }

      return handler;
    }
  }

在這里基本的一些類已經(jīng)完成了，現(xiàn)在我們來(lái)完成，關(guān)注我們的微信公眾號(hào)，我們就發(fā)送一條圖文消息，同時(shí)輸入我們的一些關(guān)鍵字，返回一些消息，比如輸入id返回用戶的openid等等。

二.PicTextMessage

public class PicTextMessage : Message
  {
    /// summary>
    /// 模板靜態(tài)字段
    /// /summary>
    private static string m_Template;

    /// summary>
    /// 默認(rèn)構(gòu)造函數(shù)
    /// /summary>
    public PicTextMessage()
    {
      this.MsgType = "news";
    }
    /// summary>
    /// 從xml數(shù)據(jù)加載文本消息
    /// /summary>
    /// param name="xml">/param>
    public static PicTextMessage LoadFromXml(string xml)
    {
      PicTextMessage tm = null;
      if (!string.IsNullOrEmpty(xml))
      {
        XElement element = XElement.Parse(xml);
        if (element != null)
        {
          tm = new PicTextMessage();
          tm.FromUserName = element.Element(CommonWeiXin.FROM_USERNAME).Value;
          tm.ToUserName = element.Element(CommonWeiXin.TO_USERNAME).Value;
          tm.CreateTime = element.Element(CommonWeiXin.CREATE_TIME).Value;
        }
      }

      return tm;
    }
    /// summary>
    /// 模板
    /// /summary>
    public override string Template
    {
      get
      {
        if (string.IsNullOrEmpty(m_Template))
        {
          LoadTemplate();
        }

        return m_Template;
      }
    }
    /// summary>
    /// 生成內(nèi)容
    /// /summary>
    /// returns>/returns>
    public override string GenerateContent()
    {
      this.CreateTime = CommonWeiXin.GetNowTime();
      string str= string.Format(this.Template, this.ToUserName, this.FromUserName, this.CreateTime);
      return str;
    }


    /// summary>
    /// 加載模板
    /// /summary>
    private static void LoadTemplate()
    {
      m_Template= @"xml>
              ToUserName>![CDATA[{0}]]>/ToUserName>
              FromUserName>![CDATA[{1}]]>/FromUserName>
              CreateTime>{2}/CreateTime>
              MsgType>![CDATA[news]]>/MsgType>
              ArticleCount>1/ArticleCount>
              Articles>
                item>
                Title>![CDATA[有位停車歡迎你！]]>/Title> 
                Description>![CDATA[如有問(wèn)題請(qǐng)致電400-6238-136或直接在微信留言，我們將第一時(shí)間為您服務(wù)!]]>/Description>
                PicUrl>![CDATA[http://www.baidu.com/youwei.jpg]]>/PicUrl>
                Url>![CDATA[http://www.baidu.com]]>/Url>
                /item>
              /Articles>
            /xml> ";
    }
  }

最后我們的效果如下所示；

以上所述就是本文的全部?jī)?nèi)容了，希望大家能夠喜歡

您可能感興趣的文章:

asp.net微信開發(fā)（永久素材管理）
asp.net微信開發(fā)（高級(jí)群發(fā)圖文）
asp.net微信開發(fā)（高級(jí)群發(fā)文本）
asp.net微信開發(fā)（自定義會(huì)話管理）
.NET微信公眾號(hào)開發(fā)之準(zhǔn)備工作
asp.net開發(fā)微信公眾平臺(tái)之驗(yàn)證消息的真實(shí)性
asp.net開發(fā)微信公眾平臺(tái)之獲取用戶消息并處理
Android仿微信發(fā)朋友圈瀏覽圖片效果
基于js實(shí)現(xiàn)微信發(fā)送好友如何分享到朋友圈、微博
.Net語(yǔ)言Smobiler開發(fā)之如何仿微信朋友圈的消息樣式

標(biāo)簽：梧州甘孜烏蘭察布威海隨州西雙版納開封廣西

巨人網(wǎng)絡(luò)通訊聲明：本文標(biāo)題《.NET微信公眾號(hào)開發(fā)之公眾號(hào)消息處理》，本文關(guān)鍵詞；如發(fā)現(xiàn)本文內(nèi)容存在版權(quán)問(wèn)題，煩請(qǐng)?zhí)峁┫嚓P(guān)信息告之我們，我們將及時(shí)溝通與處理。本站內(nèi)容系統(tǒng)采集于網(wǎng)絡(luò)，涉及言論、版權(quán)與本站無(wú)關(guān)。