ASP.NET微信开发接口指南详细介绍

公众平台用户提交信息后，微信服务器将发送GET请求到填写的URL上，并且带上四个参数：

开发者通过检验signature对请求进行校验（下面有校验方式）。若确认此次GET请求来自微信服务器，请原样返回echostr参数内容，则接入生效，否则接入失败。

signature结合了开发者填写的token参数和请求中的timestamp参数、nonce参数。

加密/校验流程：

• 1. 将token、timestamp、nonce三个参数进行字典序排序

• 2. 将三个参数字符串拼接成一个字符串进行sha1加密

• 3. 开发者获得加密后的字符串可与signature对比，标识该请求来源于微信

/// <summary>    /// 验证签名    /// </summary>    /// <param name="signature"></param>    /// <param name="timestamp"></param>    /// <param name="nonce"></param>    /// <returns></returns>    public static bool CheckSignature(String signature, String timestamp, String nonce)    {    String[] arr = new String[] { token, timestamp, nonce };    // 将token、timestamp、nonce三个参数进行字典序排序    Array.Sort<String>(arr);       StringBuilder content = new StringBuilder();    for (int i = 0; i < arr.Length; i++)    {     content.Append(arr[i]);    }       String tmpStr = SHA1_Encrypt(content.ToString());          // 将sha1加密后的字符串可与signature对比，标识该请求来源于微信    return tmpStr != null ? tmpStr.Equals(signature) : false;    }          /// <summary>    /// 使用缺省密钥给字符串加密    /// </summary>    /// <param name="Source_String"></param>    /// <returns></returns>    public static string SHA1_Encrypt(string Source_String)    {    byte[] StrRes = Encoding.Default.GetBytes(Source_String);    HashAlgorithm iSHA = new SHA1CryptoServiceProvider();    StrRes = iSHA.ComputeHash(StrRes);    StringBuilder EnText = new StringBuilder();    foreach (byte iByte in StrRes)    {     EnText.AppendFormat("{0:x2}", iByte);    }    return EnText.ToString();    }

   protected void Page_Load(object sender, EventArgs e)    {       if (Request.HttpMethod.ToUpper() == "GET")    {     // 微信加密签名     string signature = Request.QueryString["signature"];     // 时间戳     string timestamp = Request.QueryString["timestamp"];     // 随机数     string nonce = Request.QueryString["nonce"];     // 随机字符串     string echostr = Request.QueryString["echostr"];     if (WeixinServer.CheckSignature(signature, timestamp, nonce))     {     Response.Write(echostr);     }       }    else if (Request.HttpMethod.ToUpper() == "POST")    {        StreamReader stream = new StreamReader(Request.InputStream);     string xml = stream.ReadToEnd();        processRequest(xml);    }          }          /// <summary>    /// 处理微信发来的请求    /// </summary>    /// <param name="xml"></param>    public void processRequest(String xml)    {    try    {        // xml请求解析     Hashtable requestHT = WeixinServer.ParseXml(xml);        // 发送方帐号（open_id）     string fromUserName = (string)requestHT["FromUserName"];     // 公众帐号     string toUserName = (string)requestHT["ToUserName"];     // 消息类型     string msgType = (string)requestHT["MsgType"];        //文字消息     if (msgType == ReqMsgType.Text)     {     // Response.Write(str);        string content = (string)requestHT["Content"];     if(content=="1")     {      // Response.Write(str);      Response.Write(GetNewsMessage(toUserName, fromUserName));      return;     }     if (content == "2")     {      Response.Write(GetUserBlogMessage(toUserName, fromUserName));      return;     }     if (content == "3")     {      Response.Write(GetGroupMessage(toUserName, fromUserName));      return;     }     if (content == "4")     {      Response.Write(GetWinePartyMessage(toUserName, fromUserName));      return;     }     Response.Write(GetMainMenuMessage(toUserName, fromUserName, "你好，我是vinehoo,"));        }     else if (msgType == ReqMsgType.Event)     {     // 事件类型     String eventType = (string)requestHT["Event"];     // 订阅     if (eventType==ReqEventType.Subscribe)     {           Response.Write(GetMainMenuMessage(toUserName, fromUserName, "谢谢您的关注！,"));          }     // 取消订阅     else if (eventType==ReqEventType.Unsubscribe)     {      // TODO 取消订阅后用户再收不到公众号发送的消息，因此不需要回复消息     }     // 自定义菜单点击事件     else if (eventType==ReqEventType.CLICK)     {      // TODO 自定义菜单权没有开放，暂不处理该类消息     }     }     else if (msgType == ReqMsgType.Location)     {     }          }    catch (Exception e)    {        }    }<pre name="code" class="csharp"> protected void Page_Load(object sender, EventArgs e)    {       if (Request.HttpMethod.ToUpper() == "GET")    {     // 微信加密签名     string signature = Request.QueryString["signature"];     // 时间戳     string timestamp = Request.QueryString["timestamp"];     // 随机数     string nonce = Request.QueryString["nonce"];     // 随机字符串     string echostr = Request.QueryString["echostr"];     if (WeixinServer.CheckSignature(signature, timestamp, nonce))     {     Response.Write(echostr);     }       }    else if (Request.HttpMethod.ToUpper() == "POST")    {        StreamReader stream = new StreamReader(Request.InputStream);     string xml = stream.ReadToEnd();        processRequest(xml);    }          }          /// <summary>    /// 处理微信发来的请求    /// </summary>    /// <param name="xml"></param>    public void processRequest(String xml)    {    try    {        // xml请求解析     Hashtable requestHT = WeixinServer.ParseXml(xml);        // 发送方帐号（open_id）     string fromUserName = (string)requestHT["FromUserName"];     // 公众帐号     string toUserName = (string)requestHT["ToUserName"];     // 消息类型     string msgType = (string)requestHT["MsgType"];        //文字消息     if (msgType == ReqMsgType.Text)     {     // Response.Write(str);        string content = (string)requestHT["Content"];     if(content=="1")     {      // Response.Write(str);      Response.Write(GetNewsMessage(toUserName, fromUserName));      return;     }     if (content == "2")     {      Response.Write(GetUserBlogMessage(toUserName, fromUserName));      return;     }     if (content == "3")     {      Response.Write(GetGroupMessage(toUserName, fromUserName));      return;     }     if (content == "4")     {      Response.Write(GetWinePartyMessage(toUserName, fromUserName));      return;     }     Response.Write(GetMainMenuMessage(toUserName, fromUserName, "你好，我是vinehoo,"));        }     else if (msgType == ReqMsgType.Event)     {     // 事件类型     String eventType = (string)requestHT["Event"];     // 订阅     if (eventType==ReqEventType.Subscribe)     {           Response.Write(GetMainMenuMessage(toUserName, fromUserName, "谢谢您的关注！,"));          }     // 取消订阅     else if (eventType==ReqEventType.Unsubscribe)     {      // TODO 取消订阅后用户再收不到公众号发送的消息，因此不需要回复消息     }     // 自定义菜单点击事件     else if (eventType==ReqEventType.CLICK)     {      // TODO 自定义菜单权没有开放，暂不处理该类消息     }     }     else if (msgType == ReqMsgType.Location)     {     }          }    catch (Exception e)    {        }    }</pre><br>   <pre></pre>   <br>   <br>

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