這篇文章給大家分享的是有關(guān).NET微信開發(fā)之公眾號消息處理的示例分析的內(nèi)容。小編覺得挺實(shí)用的,因此分享給大家做個參考,一起跟隨小編過來看看吧。
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<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最基本的模式,有發(fā)送者,接受者,創(chuàng)建時間,類型,內(nèi)容等等。
首先我們來創(chuàng)建一個消息處理的類,這個類用來捕獲,所有的消息請求,根據(jù)不同的消息請求類型來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> /// 處理請求,產(chǎn)生響應(yīng) /// </summary> /// <returns></returns> public string Response() { string method = Request.HttpMethod.ToUpper(); //驗證簽名 if (method == "GET") { if (CheckSignature()) { return Request.QueryString[ECHOSTR]; } else { return "error"; } } //處理消息 if (method == "POST") { return ResponseMsg(); } else { return "無法處理"; } } /// <summary> /// 處理請求 /// </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]; List<string> list = new List<string>(); 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); //驗證 if (new_signature == signature) { return true; } else { return false; } } }
在來看看我們的首先是如何捕獲消息的。首頁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)接收請求,具體處理請求 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是一個消息處理接口,其下面有EventHandler,TextHandler處理類實(shí)現(xiàn)這個接口。代碼如下
/// <summary> /// 處理接口 /// </summary> public interface IHandler { /// <summary> /// 處理請求 /// </summary> /// <returns></returns> string HandleRequest(); }
EventHandler
class EventHandler : IHandler { /// <summary> /// 請求的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))//用來判斷是不是首次關(guān)注 { PicTextMessage tm = new PicTextMessage();//我自己創(chuàng)建的一個圖文消息處理類 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> /// 請求的XML /// </summary> private string RequestXml { get; set; } /// <summary> /// 構(gòu)造函數(shù) /// </summary> /// <param name="requestXml">請求的xml</param> public TextHandler(string requestXml) { this.RequestXml = requestXml; } /// <summary> /// 處理請求 /// </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 = "您什么都沒輸入,沒法幫您啊。"; } 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">請求的xml</param> /// <returns>IHandler對象</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)在我們來完成,關(guān)注我們的微信公眾號,我們就發(fā)送一條圖文消息,同時輸入我們的一些關(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[如有問題請致電400-6238-136或直接在微信留言,我們將第一時間為您服務(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;
感謝各位的閱讀!關(guān)于“.NET微信開發(fā)之公眾號消息處理的示例分析”這篇文章就分享到這里了,希望以上內(nèi)容可以對大家有一定的幫助,讓大家可以學(xué)到更多知識,如果覺得文章不錯,可以把它分享出去讓更多的人看到吧!
當(dāng)前名稱:.NET微信開發(fā)之公眾號消息處理的示例分析-創(chuàng)新互聯(lián)
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