微信公众平台

  1 using System;
  2 using System.Collections;
  3 using System.Configuration;
  4 using System.Data;
  5 using System.Linq;
  6 using System.Web;
  7 using System.Web.Security;
  8 using System.Web.UI;
  9 using System.Web.UI.HtmlControls;
 10 using System.Web.UI.WebControls;
 11 using System.Web.UI.WebControls.WebParts;
 12 using System.Xml.Linq;
 13 using System.Xml;
 14 using System.IO;
 15 using System.Text;
 16 using System.Collections.Generic;
 17 using System.Net;
 18 
 19 
 20 namespace weixin
 21 {
 22     public partial class index : System.Web.UI.Page
 23     {
 24         const string Token = "token"; //与那边填写的token一致
 25         protected void Page_Load(object sender, EventArgs e)
 26         {
 27             string postStr = "";
 28             if (Request.HttpMethod.ToLower() == "post")
 29             {
 30                 Stream s = System.Web.HttpContext.Current.Request.InputStream;
 31                 byte[] b = new byte[s.Length];
 32                 s.Read(b, 0, (int)s.Length);
 33                 postStr = Encoding.UTF8.GetString(b);
 34 
 35 
 36                 if (!string.IsNullOrEmpty(postStr))
 37                 {
 38                     //封装请求类
 39                     XmlDocument doc = new XmlDocument();
 40                     doc.LoadXml(postStr);
 41                     XmlElement rootElement = doc.DocumentElement;
 42 
 43 
 44                     XmlNode MsgType = rootElement.SelectSingleNode("MsgType");
 45 
 46 
 47                     RequestXML requestXML = new RequestXML();
 48                     requestXML.ToUserName = rootElement.SelectSingleNode("ToUserName").InnerText;
 49                     requestXML.FromUserName = rootElement.SelectSingleNode("FromUserName").InnerText;
 50                     requestXML.CreateTime = rootElement.SelectSingleNode("CreateTime").InnerText;
 51                     requestXML.MsgType = MsgType.InnerText;
 52 
 53 
 54                     if (requestXML.MsgType == "text")
 55                     {
 56                         requestXML.Content = rootElement.SelectSingleNode("Content").InnerText;
 57                     }
 58                     else if (requestXML.MsgType == "location")
 59                     {
 60                         requestXML.Location_X = rootElement.SelectSingleNode("Location_X").InnerText;
 61                         requestXML.Location_Y = rootElement.SelectSingleNode("Location_Y").InnerText;
 62                         requestXML.Scale = rootElement.SelectSingleNode("Scale").InnerText;
 63                         requestXML.Label = rootElement.SelectSingleNode("Label").InnerText;
 64                     }
 65                     else if (requestXML.MsgType == "image")
 66                     {
 67                         requestXML.PicUrl = rootElement.SelectSingleNode("PicUrl").InnerText;
 68                     }
 69 
 70 
 71                     //回复消息
 72                     ResponseMsg(requestXML);
 73                 }
 74             }
 75             else
 76             {
 77                 Valid();
 78             }
 79         }
 80 
 81 
 82         /// <summary>
 83         /// 验证微信签名
 84         /// </summary>
 85         /// * 将token、timestamp、nonce三个参数进行字典序排序
 86         /// * 将三个参数字符串拼接成一个字符串进行sha1加密
 87         /// * 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。
 88         /// <returns></returns>
 89         private bool CheckSignature()
 90         {
 91             string signature = Request.QueryString["signature"];
 92             string timestamp = Request.QueryString["timestamp"];
 93             string nonce = Request.QueryString["nonce"];
 94             string[] ArrTmp = { Token, timestamp, nonce };
 95             Array.Sort(ArrTmp);     //字典排序
 96             string tmpStr = string.Join("", ArrTmp);
 97             tmpStr = FormsAuthentication.HashPasswordForStoringInConfigFile(tmpStr, "SHA1");
 98             tmpStr = tmpStr.ToLower();
 99             if (tmpStr == signature)
100             {
101                 return true;
102             }
103             else
104             {
105                 return false;
106             }
107         }
108 
109 
110         private void Valid()
111         {
112             string echoStr = Request.QueryString["echoStr"];
113             if (CheckSignature())
114             {
115                 if (!string.IsNullOrEmpty(echoStr))
116                 {
117                     Response.Write(echoStr);
118                     Response.End();
119                 }
120             }
121         }
122 
123 
124         /// <summary>
125         /// 回复消息(微信信息返回)
126         /// </summary>
127         /// <param name="weixinXML"></param>
128         private void ResponseMsg(RequestXML requestXML)
129         {
130             try
131             {
132                 string resxml = "";
133                 if (requestXML.MsgType == "text")
134                 {
135                     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>";
136                 }
137                 else if (requestXML.MsgType == "location")
138                 {
139                     string city = GetMapInfo(requestXML.Location_X, requestXML.Location_Y);
140                     if (city == "0")
141                     {
142                         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>";
143                     }
144                     else
145                     {
146                         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>";
147                     }
148                 }
149                 else if (requestXML.MsgType == "image")
150                 {
151                     //返回10以内条
152                     int size = 10;
153                     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>";
154                     List<string> list = new List<string>();
155                     //假如有20条查询的返回结果
156                     for (int i = 0; i < 20; i++)
157                     {
158                         list.Add("1");
159                     }
160                     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" };
161 
162 
163                     for (int i = 0; i < size && i < list.Count; i++)
164                     {
165                         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>";
166                     }
167                     resxml += "</Articles><FuncFlag>1</FuncFlag></xml>";
168                 }
169                 WriteTxt(resxml);
170                 Response.Write(resxml);
171             }
172             catch (Exception ex)
173             {
174                 WriteTxt("异常：" + ex.Message + "Struck:" + ex.StackTrace.ToString());
175             }
176         }
177 
178 
179 
180 
181 
182 
183         /// <summary>
184         /// unix时间转换为datetime
185         /// </summary>
186         /// <param name="timeStamp"></param>
187         /// <returns></returns>
188         private DateTime UnixTimeToTime(string timeStamp)
189         {
190             DateTime dtStart = TimeZone.CurrentTimeZone.ToLocalTime(new DateTime(1970, 1, 1));
191             long lTime = long.Parse(timeStamp + "0000000");
192             TimeSpan toNow = new TimeSpan(lTime);
193             return dtStart.Add(toNow);
194         }
195 
196 
197         /// <summary>
198         /// datetime转换为unixtime
199         /// </summary>
200         /// <param name="time"></param>
201         /// <returns></returns>
202         private int ConvertDateTimeInt(System.DateTime time)
203         {
204             System.DateTime startTime = TimeZone.CurrentTimeZone.ToLocalTime(new System.DateTime(1970, 1, 1));
205             return (int)(time - startTime).TotalSeconds;
206         }
207 
208 
209         /// <summary>
210         /// 记录bug，以便调试
211         /// </summary>
212         /// <returns></returns>
213         public bool WriteTxt(string str)
214         {
215             try
216             {
217                 FileStream fs = new FileStream(Server.MapPath("/bugLog.txt"), FileMode.Append);
218                 StreamWriter sw = new StreamWriter(fs);
219                 //开始写入
220                 sw.WriteLine(str);
221                 //清空缓冲区
222                 sw.Flush();
223                 //关闭流
224                 sw.Close();
225                 fs.Close();
226             }
227             catch (Exception)
228             {
229                 return false;
230             }
231             return true;
232         }
233 
234 
235         /// <summary>
236         /// 调用百度地图，返回坐标信息
237         /// </summary>
238         /// <param name="y">经度</param>
239         /// <param name="x">纬度</param>
240         /// <returns></returns>
241         public string GetMapInfo(string x, string y)
242         {
243             try
244             {
245                 string res = string.Empty;
246                 string parame = string.Empty;
247                 string url = "http://maps.googleapis.com/maps/api/geocode/xml";
248                 parame = "latlng=" + x + "," + y + "&language=zh-CN&sensor=false";//此key为个人申请
249                 res = webRequestPost(url, parame);
250 
251 
252                 XmlDocument doc = new XmlDocument();
253 
254 
255                 doc.LoadXml(res);
256                 XmlElement rootElement = doc.DocumentElement;
257                 string Status = rootElement.SelectSingleNode("status").InnerText;
258                 if (Status == "OK")
259                 {
260                     //仅获取城市
261                     XmlNodeList xmlResults = rootElement.SelectSingleNode("/GeocodeResponse").ChildNodes;
262                     for (int i = 0; i < xmlResults.Count; i++)
263                     {
264                         XmlNode childNode = xmlResults[i];
265                         if (childNode.Name == "status")
266                         {
267                             continue;
268                         }
269 
270 
271                         string city = "0";
272                         for (int w = 0; w < childNode.ChildNodes.Count; w++)
273                         {
274                             for (int q = 0; q < childNode.ChildNodes[w].ChildNodes.Count; q++)
275                             {
276                                 XmlNode childeTwo = childNode.ChildNodes[w].ChildNodes[q];
277 
278 
279                                 if (childeTwo.Name == "long_name")
280                                 {
281                                     city = childeTwo.InnerText;
282                                 }
283                                 else if (childeTwo.InnerText == "locality")
284                                 {
285                                     return city;
286                                 }
287                             }
288                         }
289                         return city;
290                     }
291                 }
292             }
293             catch (Exception ex)
294             {
295                 WriteTxt("map异常:" + ex.Message.ToString() + "Struck:" + ex.StackTrace.ToString());
296                 return "0";
297             }
298 
299 
300             return "0";
301         }
302 
303 
304         /// <summary>
305         /// Post 提交调用抓取
306         /// </summary>
307         /// <param name="url">提交地址</param>
308         /// <param name="param">参数</param>
309         /// <returns>string</returns>
310         public string webRequestPost(string url, string param)
311         {
312             byte[] bs = System.Text.Encoding.UTF8.GetBytes(param);
313 
314 
315             HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create(url + "?" + param);
316             req.Method = "Post";
317             req.Timeout = 120 * 1000;
318             req.ContentType = "application/x-www-form-urlencoded;";
319             req.ContentLength = bs.Length;
320 
321 
322             using (Stream reqStream = req.GetRequestStream())
323             {
324                 reqStream.Write(bs, 0, bs.Length);
325                 reqStream.Flush();
326             }
327             using (WebResponse wr = req.GetResponse())
328             {
329                 //在这里对接收到的页面内容进行处理 
330 
331 
332                 Stream strm = wr.GetResponseStream();
333 
334 
335                 StreamReader sr = new StreamReader(strm, System.Text.Encoding.UTF8);
336 
337 
338                 string line;
339 
340 
341                 System.Text.StringBuilder sb = new System.Text.StringBuilder();
342 
343 
344                 while ((line = sr.ReadLine()) != null)
345                 {
346                     sb.Append(line + System.Environment.NewLine);
347                 }
348                 sr.Close();
349                 strm.Close();
350                 return sb.ToString();
351             }
352         }
353 
354 
355 
356 
357     }
358 
359 
360     //微信请求类
361     public class RequestXML
362     {
363         private string toUserName;
364         /// <summary>
365         /// 消息接收方微信号，一般为公众平台账号微信号
366         /// </summary>
367         public string ToUserName
368         {
369             get { return toUserName; }
370             set { toUserName = value; }
371         }
372 
373 
374         private string fromUserName;
375         /// <summary>
376         /// 消息发送方微信号
377         /// </summary>
378         public string FromUserName
379         {
380             get { return fromUserName; }
381             set { fromUserName = value; }
382         }
383 
384 
385         private string createTime;
386         /// <summary>
387         /// 创建时间
388         /// </summary>
389         public string CreateTime
390         {
391             get { return createTime; }
392             set { createTime = value; }
393         }
394 
395 
396         private string msgType;
397         /// <summary>
398         /// 信息类型 地理位置:location,文本消息:text,消息类型:image
399         /// </summary>
400         public string MsgType
401         {
402             get { return msgType; }
403             set { msgType = value; }
404         }
405 
406 
407         private string content;
408         /// <summary>
409         /// 信息内容
410         /// </summary>
411         public string Content
412         {
413             get { return content; }
414             set { content = value; }
415         }
416 
417 
418         private string location_X;
419         /// <summary>
420         /// 地理位置纬度
421         /// </summary>
422         public string Location_X
423         {
424             get { return location_X; }
425             set { location_X = value; }
426         }
427 
428 
429         private string location_Y;
430         /// <summary>
431         /// 地理位置经度
432         /// </summary>
433         public string Location_Y
434         {
435             get { return location_Y; }
436             set { location_Y = value; }
437         }
438 
439 
440         private string scale;
441         /// <summary>
442         /// 地图缩放大小
443         /// </summary>
444         public string Scale
445         {
446             get { return scale; }
447             set { scale = value; }
448         }
449 
450 
451         private string label;
452         /// <summary>
453         /// 地理位置信息
454         /// </summary>
455         public string Label
456         {
457             get { return label; }
458             set { label = value; }
459         }
460 
461 
462         private string picUrl;
463         /// <summary>
464         /// 图片链接，开发者可以用HTTP GET获取
465         /// </summary>
466         public string PicUrl
467         {
468             get { return picUrl; }
469             set { picUrl = value; }
470         }
471     }
472 }
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原文地址：https://www.cnblogs.com/lihui1030/p/3108820.html