公众平台信息接口为开发者提供了一种新的消息处理方式,只有申请成为开发者后,你才能使用公众平台的开发功能,在这里你需要填写一个URL和一个Token,这两项信息也需要你拥有自己的服务器(外网服务器)资源,其中的Token可由开发者任意填写,URL即是接口配置信息的链接地址,在本文中我采用的是创建一个简易网站的方式,在其中的一个页面的后台程序中配置相关的接口信息,然后发布到外网服务器上,最后可以访问到这个页面的链接地址即是这里应该填写的URL。
/// summary>
/// 验证微信签名
/// /summary>
/// returns>/returns>
private bool CheckSignature()
{
string signature = Request.QueryString["signature"].ToString();
string timestamp = Request.QueryString["timestamp"].ToString();
string nonce = Request.QueryString["nonce"].ToString();
string[] ArrTmp = { Token, timestamp, nonce };
Array.Sort(ArrTmp);//字典排序
string tmpStr = string.Join("", ArrTmp);
tmpStr = FormsAuthentication.HashPasswordForStoringInConfigFile(tmpStr, "SHA1");//对该字符串进行sha1加密
tmpStr = tmpStr.ToLower();//对字符串中的字母部分进行小写转换,非字母字符不作处理
//WriteLog(tmpStr, Server);//计入日志
if (tmpStr == signature)//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。开发者通过检验signature对请求进行校验,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
{
return true;
}
else
return false;
}
/// summary>
/// 获取post返回来的数据
/// /summary>
/// returns>/returns>
private string PostInput()
{
Stream s = System.Web.HttpContext.Current.Request.InputStream;
byte[] b = new byte[s.Length];
s.Read(b, 0, (int)s.Length);
return Encoding.UTF8.GetString(b);
}
/// summary>
///返回微信信息结果
/// /summary>
/// param name="weixinXML">/param>
private void ResponseMsg(string weixinXML)
{
try
{
XmlDocument doc = new XmlDocument();
doc.LoadXml(weixinXML);//读取XML字符串
XmlElement rootElement = doc.DocumentElement;
XmlNode MsgType = rootElement.SelectSingleNode("MsgType");//获取字符串中的消息类型
string resxml = "";
if (MsgType.InnerText == "text")//如果消息类型为文本消息
{
var model = new
{
ToUserName = rootElement.SelectSingleNode("ToUserName").InnerText,
FromUserName = rootElement.SelectSingleNode("FromUserName").InnerText,
CreateTime = rootElement.SelectSingleNode("CreateTime").InnerText,
MsgType = MsgType.InnerText,
Content = rootElement.SelectSingleNode("Content").InnerText,
MsgId = rootElement.SelectSingleNode("MsgId").InnerText
};
resxml += "xml>ToUserName>![CDATA[" + model.FromUserName + "]]>/ToUserName>FromUserName>![CDATA[" + model.ToUserName + "]]>/FromUserName>CreateTime>" + ConvertDateTimeInt(DateTime.Now) + "/CreateTime>";
if (!string.IsNullOrEmpty(model.Content))//如果接收到消息
{
if (model.Content.Contains(" 你好") || model.Content.Contains(" 好") || model.Content.Contains("hi") || model.Content.Contains("hello"))// 你好
{
resxml += "MsgType>![CDATA[text]]>/MsgType>Content>![CDATA[你好,有事请留言,偶会及时回复你的。]]>/Content>FuncFlag>0/FuncFlag>/xml>";
}
}
else//没有接收到消息
{
resxml += "MsgType>![CDATA[text]]>/MsgType>Content>![CDATA[亲,感谢您对我的关注,有事请留言。]]>/Content>FuncFlag>0/FuncFlag>/xml>";
}
Response.Write(resxml);
}
if (MsgType.InnerText == "image")//如果消息类型为图片消息
{
var model = new
{
ToUserName = rootElement.SelectSingleNode("ToUserName").InnerText,
FromUserName = rootElement.SelectSingleNode("FromUserName").InnerText,
CreateTime = rootElement.SelectSingleNode("CreateTime").InnerText,
MsgType = MsgType.InnerText,
PicUrl = rootElement.SelectSingleNode("PicUrl").InnerText,
MsgId = rootElement.SelectSingleNode("MsgId").InnerText
};
resxml += "xml>ToUserName>![CDATA[" + model.FromUserName + "]]>/ToUserName>FromUserName>![CDATA[" + model.ToUserName + "]]>/FromUserName>CreateTime>" + ConvertDateTimeInt(DateTime.Now) + "/CreateTime>MsgType>![CDATA[news]]>/MsgType>ArticleCount>1/ArticleCount>Articles>item>Title>![CDATA[欢迎您的光临!]]>/Title>Description>![CDATA[非常感谢您的关注!]]>/Description>PicUrl>![CDATA[http://...jpg]]>/PicUrl>Url>![CDATA[http://www.baidu.com/]]>/Url>/item>/Articles>FuncFlag>0/FuncFlag>/xml>";
Response.Write(resxml);
}
else//如果是其余的消息类型
{
var model = new
{
ToUserName = rootElement.SelectSingleNode("ToUserName").InnerText,
FromUserName = rootElement.SelectSingleNode("FromUserName").InnerText,
CreateTime = rootElement.SelectSingleNode("CreateTime").InnerText,
};
resxml += "xml>ToUserName>![CDATA[" + model.FromUserName + "]]>/ToUserName>FromUserName>![CDATA[" + model.ToUserName + "]]>/FromUserName>CreateTime>" + ConvertDateTimeInt(DateTime.Now) + "/CreateTime>MsgType>![CDATA[text]]>/MsgType>Content>![CDATA[亲,感谢您对我的关注,有事请留言,我会及时回复你的哦。]]>/Content>FuncFlag>0/FuncFlag>/xml>";
Response.Write(resxml);
}
}
catch (Exception ex)
{
throw ex;
}
Response.End();
}
/// summary>
/// datetime转换成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>
/// 写日志(用于跟踪),可以将想打印出的内容计入一个文本文件里面,便于测试
/// /summary>
public static void WriteLog(string strMemo, HttpServerUtility server)
{
string filename = server.MapPath("/logs/log.txt");//在网站项目中建立一个文件夹命名logs(然后在文件夹中随便建立一个web页面文件,避免网站在发布到服务器之后看不到预定文件)
if (!Directory.Exists(server.MapPath("//logs//")))
Directory.CreateDirectory("//logs//");
StreamWriter sr = null;
try
{
if (!File.Exists(filename))
{
sr = File.CreateText(filename);
}
else
{
sr = File.AppendText(filename);
}
sr.WriteLine(strMemo);
}
catch
{
}
finally
{
if (sr != null)
sr.Close();
}
}