微信越来越火，微信公众平台成为开发成新宠，本文用C#.net开发微信公众信号接口。
微信接口地址代码:
weixin _wx = new weixin();
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)) //请求处理
{
_wx.Handle(postStr);
}
}
else
{
_wx.Auth();
}
微信处理类：
public class weixin
{
private string Token = "weixin_token"; //换成自己的token
public void Auth()
{
string echoStr = System.Web.HttpContext.Current.Request.QueryString["echoStr"];
if (CheckSignature())
{
if (!string.IsNullOrEmpty(echoStr))
{
System.Web.HttpContext.Current.Response.Write(echoStr);
System.Web.HttpContext.Current.Response.End();
}
}
}
public void Handle(string 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);
}
/// <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 = System.Web.HttpContext.Current.Request.QueryString["signature"];
string timestamp = System.Web.HttpContext.Current.Request.QueryString["timestamp"];
string nonce = System.Web.HttpContext.Current.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;
}
}
/// <summary>
/// 回复消息(微信信息返回)
/// </summary>
/// <param name="weixinXML"></param>
private void ResponseMsg(RequestXML requestXML)
{
try
{
string resxml = "";
mijiya mi = new mijiya(requestXML.Content,requestXML.FromUserName);
if (requestXML.MsgType == "text")
{
//在这里执行一系列操作，从而实现自动回复内容.
string _reMsg = mi.GetReMsg();
if (mi.msgType == 1)
{
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>2</ArticleCount><Articles>";
resxml += mi.GetRePic(requestXML.FromUserName);
resxml += "</Articles><FuncFlag>1</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[" + _reMsg + "]]></Content><FuncFlag>1</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[好啦，我们知道您的位置啦。您可以:" + mi.GetDefault() + "]]></Content><FuncFlag>1</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[好啦，我们知道您的位置啦。您可以:" + mi.GetDefault() + "]]></Content><FuncFlag>1</FuncFlag></xml>";
}
}
else if (requestXML.MsgType == "image")
{
resxml = "<xml><ToUserName><![CDATA[" + requestXML.FromUserName + "]]></ToUserName><FromUserName><![CDATA[" + requestXML.ToUserName + "]]></FromUserName><CreateTime>" + ConvertDateTimeInt(DateTime.Now) + "</CreateTime><MsgType><![CDATA[text]]></MsgType><Content><![CDATA[亲,我没有看懂你的意思。您可以:" + mi.GetDefault() + "]]></Content><FuncFlag>1</FuncFlag></xml>";
//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>";
}
else if (wx_tmsg.GetMsgCount(requestXML.FromUserName) == 0)
{
resxml = "<xml><ToUserName><![CDATA[" + requestXML.FromUserName + "]]></ToUserName><FromUserName><![CDATA[" + requestXML.ToUserName + "]]></FromUserName><CreateTime>" + ConvertDateTimeInt(DateTime.Now) + "</CreateTime><MsgType><![CDATA[text]]></MsgType><Content><![CDATA[" + mi.GetFirst() + "]]></Content><FuncFlag>1</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[亲,我没有看懂你的意思。您可以:" + mi.GetDefault() + "]]></Content><FuncFlag>1</FuncFlag></xml>";
}
//WriteTxt(resxml);
System.Web.HttpContext.Current.Response.Write(resxml);
WriteToDB(requestXML, resxml,mi.pid);
}
catch (Exception ex)
{
//WriteTxt("异常：" + ex.Message + "Struck:" + ex.StackTrace.ToString());
wx_logs.MyInsert("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>
/// 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();
}
}
private void WriteToDB(RequestXML requestXML,string _xml,int _pid)
{
wx_tmsg wx = new wx_tmsg();
wx.AddNew();
wx.FromUserName = requestXML.FromUserName;
wx.ToUserName = requestXML.ToUserName;
wx.MsgType = requestXML.MsgType;
wx.Msg = requestXML.Content;
wx.Creatime = requestXML.CreateTime;
wx.Location_X = requestXML.Location_X;
wx.Location_Y = requestXML.Location_Y;
wx.Label = requestXML.Label;
wx.Scale = requestXML.Scale;
wx.PicUrl = requestXML.PicUrl;
wx.reply = _xml;
wx.pid = _pid;
try
{
wx.Update();
}
catch (Exception ex)
{
wx_logs.MyInsert(ex.Message);
//ex.message;
}
}
}
//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; }
}
}
说明： 其中用到的mijiya类，主要是调用数据库进行关键词匹配自动回复内容，可以根据自己的业务情况编写。