微信公众帐号消息帐号

未来是属于微信这种产品的时代。老板每次都兴奋地跟我提起他是如何如何的好。

我之前以为微信只是QQ的手机语音版，没想到腾讯竟然有如此大的勇气突破落后的生态体制，大力扶持微信，而不遭到内部固有生态的排他影响。20世纪经评网说，这是腾讯的“光荣革命”。关于他们的表述，我是完全认同的。

以下是前几天做的微信消息接口：

 using System;
 using System.Collections;
 using System.Configuration;
 using System.Data;
 using System.Linq;
 using System.Web;
 using System.Web.Security;
 using System.Web.UI;
 using System.Web.UI.HtmlControls;
 using System.Web.UI.WebControls;
 using System.Web.UI.WebControls.WebParts;
 using System.Xml.Linq;
 using System.Xml;
 using System.IO;
 using System.Text;
 using System.Collections.Generic;
 using System.Net;

 namespace OAuth2Demo
 {
     public partial class WebForm1 : System.Web.UI.Page
     {
         const string Token = "token";       //与那边填写的token一致
         protected void Page_Load(object sender, EventArgs e)
         {
             string postStr = "";
             if (Request.HttpMethod.ToLower() == "post")
             {
                 Stream s = System.Web.HttpContext.Current.Request.InputStream;
                 byte[] b = new byte[s.Length];
                 s.Read(b, 0, (int)s.Length);
                 postStr = Encoding.UTF8.GetString(b);

                 if (!string.IsNullOrEmpty(postStr))
                 {
                     //封装请求类
                     XmlDocument doc = new XmlDocument();
                     doc.LoadXml(postStr);
                     XmlElement rootElement = doc.DocumentElement;

                     XmlNode MsgType = rootElement.SelectSingleNode("MsgType");

                     RequestXML requestXML = new RequestXML();
                     requestXML.ToUserName = rootElement.SelectSingleNode("ToUserName").InnerText;
                     requestXML.FromUserName = rootElement.SelectSingleNode("FromUserName").InnerText;
                     requestXML.CreateTime = rootElement.SelectSingleNode("CreateTime").InnerText;
                     requestXML.MsgType = MsgType.InnerText;

                     if (requestXML.MsgType == "text")
                     {
                         requestXML.Content = rootElement.SelectSingleNode("Content").InnerText;
                     }
                     else if (requestXML.MsgType == "location")
                     {
                         requestXML.Location_X = rootElement.SelectSingleNode("Location_X").InnerText;
                         requestXML.Location_Y = rootElement.SelectSingleNode("Location_Y").InnerText;
                         requestXML.Scale = rootElement.SelectSingleNode("Scale").InnerText;
                         requestXML.Label = rootElement.SelectSingleNode("Label").InnerText;
                     }
                     else if (requestXML.MsgType == "image")
                     {
                         requestXML.PicUrl = rootElement.SelectSingleNode("PicUrl").InnerText;
                     }

                     //回复消息
                     ResponseMsg(requestXML);
                 }
             }
             else
             {
                 Valid();
             }
         }

         /// <summary>
         /// 验证微信签名
         /// </summary>
         /// * 将token、timestamp、nonce三个参数进行字典序排序
         /// * 将三个参数字符串拼接成一个字符串进行sha1加密
         /// * 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。
         /// <returns></returns>
         private bool CheckSignature()
         {
             string signature = Request.QueryString["signature"];
             string timestamp = Request.QueryString["timestamp"];
             string nonce = Request.QueryString["nonce"];
             string[] ArrTmp = { Token, timestamp, nonce };
             Array.Sort(ArrTmp);     //字典排序
             string tmpStr = string.Join("", ArrTmp);
             tmpStr = FormsAuthentication.HashPasswordForStoringInConfigFile(tmpStr, "SHA1");
             tmpStr = tmpStr.ToLower();
             if (tmpStr == signature)
             {
                 return true;
             }
             else
             {
                 return false;
             }
         }

         private void Valid()
         {
             string echoStr = Request.QueryString["echoStr"];
             if (CheckSignature())
             {
                 if (!string.IsNullOrEmpty(echoStr))
                 {
                     Response.Write(echoStr);
                     Response.End();
                 }
             }
         }

         /// <summary>
         /// 回复消息(微信信息返回)
         /// </summary>
         /// <param name="weixinXML"></param>
         private void ResponseMsg(RequestXML requestXML)
         {
             try
             {
                 string resxml = "";
                 if (requestXML.MsgType == "text")
                 {
                     resxml = "<xml><ToUserName><![CDATA[" + requestXML.FromUserName + "]]></ToUserName><FromUserName><![CDATA[" + requestXML.ToUserName + "]]></FromUserName><CreateTime>" + ConvertDateTimeInt(DateTime.Now) + "</CreateTime><MsgType><![CDATA[text]]></MsgType><Content><![CDATA[正在建设中，稍等时日，更多精彩……]]></Content><FuncFlag>0</FuncFlag></xml>";
                 }
                 else if (requestXML.MsgType == "location")
                 {
                     string city = GetMapInfo(requestXML.Location_X, requestXML.Location_Y);
                     if (city == "0")
                     {
                         resxml = "<xml><ToUserName><![CDATA[" + requestXML.FromUserName + "]]></ToUserName><FromUserName><![CDATA[" + requestXML.ToUserName + "]]></FromUserName><CreateTime>" + ConvertDateTimeInt(DateTime.Now) + "</CreateTime><MsgType><![CDATA[text]]></MsgType><Content><![CDATA[Sorry，没有找到" + city + " 的相关产品信息]]></Content><FuncFlag>0</FuncFlag></xml>";
                     }
                     else
                     {
                         resxml = "<xml><ToUserName><![CDATA[" + requestXML.FromUserName + "]]></ToUserName><FromUserName><![CDATA[" + requestXML.ToUserName + "]]></FromUserName><CreateTime>" + ConvertDateTimeInt(DateTime.Now) + "</CreateTime><MsgType><![CDATA[text]]></MsgType><Content><![CDATA[Sorry，这是 " + city + " 的产品信息：圈圈叉叉]]></Content><FuncFlag>0</FuncFlag></xml>";
                     }
                 }
                 else if (requestXML.MsgType == "image")
                 {
                     //返回10以内条
                     int size = 10;
                     resxml = "<xml><ToUserName><![CDATA[" + requestXML.FromUserName + "]]></ToUserName><FromUserName><![CDATA[" + requestXML.ToUserName + "]]></FromUserName><CreateTime>" + ConvertDateTimeInt(DateTime.Now) + "</CreateTime><MsgType><![CDATA[news]]></MsgType><Content><![CDATA[]]></Content><ArticleCount>" + size + "</ArticleCount><Articles>";
                     List<string> list = new List<string>();
                     //假如有20条查询的返回结果
                     for (int i = 0; i < 20; i++)
                     {
                         list.Add("1");
                     }
                     string[] piclist = new string[] { "/Abstract_Pencil_Scribble_Background_Vector_main.jpg", "/balloon_tree.jpg", "/bloom.jpg", "/colorful_flowers.jpg", "/colorful_summer_flower.jpg", "/fall.jpg", "/fall_tree.jpg", "/growing_flowers.jpg", "/shoes_illustration.jpg", "/splashed_tree.jpg" };

                     for (int i = 0; i < size && i < list.Count; i++)
                     {
                         resxml += "<item><Title><![CDATA[沈阳-黑龙江]]></Title><Description><![CDATA[元旦特价：￥300 市场价：￥400]]></Description><PicUrl><![CDATA[" + "http://www.hougelou.com" + piclist[i] + "]]></PicUrl><Url><![CDATA[http://www.hougelou.com]]></Url></item>";
                     }
                     resxml += "</Articles><FuncFlag>1</FuncFlag></xml>";
                 }
                 WriteTxt(resxml);
                 Response.Write(resxml);
             }
             catch (Exception ex)
             {
                 WriteTxt("异常："+ex.Message+"Struck:"+ex.StackTrace.ToString());
             }
         }



         /// <summary>
         /// unix时间转换为datetime
         /// </summary>
         /// <param name="timeStamp"></param>
         /// <returns></returns>
         private DateTime UnixTimeToTime(string timeStamp)
         {
             DateTime dtStart = TimeZone.CurrentTimeZone.ToLocalTime(new DateTime(1970, 1, 1));
             long lTime = long.Parse(timeStamp + "0000000");
             TimeSpan toNow = new TimeSpan(lTime);
             return dtStart.Add(toNow);
         }

         /// <summary>
         /// datetime转换为unixtime
         /// </summary>
         /// <param name="time"></param>
         /// <returns></returns>
         private int ConvertDateTimeInt(System.DateTime time)
         {
             System.DateTime startTime = TimeZone.CurrentTimeZone.ToLocalTime(new System.DateTime(1970, 1, 1));
             return (int)(time - startTime).TotalSeconds;
         }

         /// <summary>
         /// 记录bug，以便调试
         /// </summary>
         /// <returns></returns>
         public bool WriteTxt(string str)
         {
             try
             {
                 FileStream fs = new FileStream(Server.MapPath("/bugLog.txt"), FileMode.Append);
                 StreamWriter sw = new StreamWriter(fs);
                 //开始写入
                 sw.WriteLine(str);
                 //清空缓冲区
                 sw.Flush();
                 //关闭流
                 sw.Close();
                 fs.Close();
             }
             catch (Exception)
             {
                 return false;
             }
             return true;
         }

         /// <summary>
         /// 调用百度地图，返回坐标信息
         /// </summary>
         /// <param name="y">经度</param>
         /// <param name="x">纬度</param>
         /// <returns></returns>
         public string GetMapInfo(string x, string y)
         {
             try
             {
                 string res = string.Empty;
                 string parame = string.Empty;
                 string url = "http://maps.googleapis.com/maps/api/geocode/xml";
                 parame = "latlng=" + x + "," + y + "&language=zh-CN&sensor=false";//此key为个人申请
                 res = webRequestPost(url, parame);

                 XmlDocument doc = new XmlDocument();

                 doc.LoadXml(res);
                 XmlElement rootElement = doc.DocumentElement;
                 string Status = rootElement.SelectSingleNode("status").InnerText;
                 if (Status == "OK")
                 {
                     //仅获取城市
                     XmlNodeList xmlResults = rootElement.SelectSingleNode("/GeocodeResponse").ChildNodes;
                     for (int i = 0; i < xmlResults.Count; i++)
                     {
                         XmlNode childNode = xmlResults[i];
                         if (childNode.Name == "status")
                         {
                             continue;
                         }

                         string city = "0";
                         for (int w = 0; w < childNode.ChildNodes.Count; w++)
                         {
                             for (int q = 0; q < childNode.ChildNodes[w].ChildNodes.Count; q++)
                             {
                                 XmlNode childeTwo = childNode.ChildNodes[w].ChildNodes[q];

                                 if (childeTwo.Name == "long_name")
                                 {
                                     city = childeTwo.InnerText;
                                 }
                                 else if (childeTwo.InnerText == "locality")
                                 {
                                     return city;
                                 }
                             }
                         }
                         return city;
                     }
                 }
             }
             catch (Exception ex)
             {
                 WriteTxt("map异常:" + ex.Message.ToString() + "Struck:" + ex.StackTrace.ToString());
                 return "0";
             }

             return "0";
         }

         /// <summary>
         /// Post 提交调用抓取
         /// </summary>
         /// <param name="url">提交地址</param>
         /// <param name="param">参数</param>
         /// <returns>string</returns>
         public string webRequestPost(string url, string param)
         {
             byte[] bs = System.Text.Encoding.UTF8.GetBytes(param);

             HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create(url+"?"+param);
             req.Method = "Post";
             req.Timeout = 120 * 1000;
             req.ContentType = "application/x-www-form-urlencoded;";
             req.ContentLength = bs.Length;

             using (Stream reqStream = req.GetRequestStream())
             {
                 reqStream.Write(bs, 0, bs.Length);
                 reqStream.Flush();
             }
             using (WebResponse wr = req.GetResponse())
             {
                 //在这里对接收到的页面内容进行处理

                 Stream strm = wr.GetResponseStream();

                 StreamReader sr = new StreamReader(strm, System.Text.Encoding.UTF8);

                 string line;

                 System.Text.StringBuilder sb = new System.Text.StringBuilder();

                 while ((line = sr.ReadLine()) != null)
                 {
                     sb.Append(line + System.Environment.NewLine);
                 }
                 sr.Close();
                 strm.Close();
                 return sb.ToString();
             }
         }


     }

     //微信请求类
     public class RequestXML
     {
         private string toUserName;
         /// <summary>
         /// 消息接收方微信号，一般为公众平台账号微信号
         /// </summary>
         public string ToUserName
         {
             get { return toUserName; }
             set { toUserName = value; }
         }

         private string fromUserName;
         /// <summary>
         /// 消息发送方微信号
         /// </summary>
         public string FromUserName
         {
             get { return fromUserName; }
             set { fromUserName = value; }
         }

         private string createTime;
         /// <summary>
         /// 创建时间
         /// </summary>
         public string CreateTime
         {
             get { return createTime; }
             set { createTime = value; }
         }

         private string msgType;
         /// <summary>
         /// 信息类型 地理位置:location,文本消息:text,消息类型:image
         /// </summary>
         public string MsgType
         {
             get { return msgType; }
             set { msgType = value; }
         }

         private string content;
         /// <summary>
         /// 信息内容
         /// </summary>
         public string Content
         {
             get { return content; }
             set { content = value; }
         }

         private string location_X;
         /// <summary>
         /// 地理位置纬度
         /// </summary>
         public string Location_X
         {
             get { return location_X; }
             set { location_X = value; }
         }

         private string location_Y;
         /// <summary>
         /// 地理位置经度
         /// </summary>
         public string Location_Y
         {
             get { return location_Y; }
             set { location_Y = value; }
         }

         private string scale;
         /// <summary>
         /// 地图缩放大小
         /// </summary>
         public string Scale
         {
             get { return scale; }
             set { scale = value; }
         }

         private string label;
         /// <summary>
         /// 地理位置信息
         /// </summary>
         public string Label
         {
             get { return label; }
             set { label = value; }
         }

         private string picUrl;
         /// <summary>
         /// 图片链接，开发者可以用HTTP GET获取
         /// </summary>
         public string PicUrl
         {
             get { return picUrl; }
             set { picUrl = value; }
         }
     }
 }

微信4.5的demo在博客园，大家可以参照一下。

http://www.cnblogs.com/hougelou/archive/2013/04/02/2995463.html

微信5.0我会在后续的时候跟进，和大家一起讨论微信的开发，只是现在好像不太知道到底要多什么好玩的功能了，所以没什么动力了。