.NET 微信开放平台接口

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<%@ WebHandler Language="C#" Class="WeixinInterface" %>
using System;
using System.Web;
public class WeixinInterface : IHttpHandler
{
HttpContext context = null;
string postStr = "";
public void ProcessRequest(HttpContext param_context)
{
context = param_context;
//以写日志为荣,以打断点为耻.
//WriteLog("before valid \n");
//valid();//用于验证
//WriteLog("after valid, before post \n");
if (context.Request.HttpMethod.ToLower() == "post")
{
System.IO.Stream s = context.Request.InputStream;
byte[] b = new byte[s.Length];
s.Read(b, 0, (int)s.Length);
postStr = System.Text.Encoding.UTF8.GetString(b);
if (!string.IsNullOrEmpty(postStr))
{
responseMsg(postStr);
}
//WriteLog("-------AfterResponseMsg:-------\n" + postStr);
}
}
public void valid()
{
var echostr = context.Request["echoStr"].ToString();
if (checkSignature() && !string.IsNullOrEmpty(echostr))
{
context.Response.Write(echostr);
context.Response.End();//推送...不然微信平台无法验证token
}
}
public bool checkSignature()
{
var signature = context.Request["signature"].ToString();
var timestamp = context.Request["timestamp"].ToString();
var nonce = context.Request["nonce"].ToString();
var token = "faketoken";
string[] ArrTmp = { token, timestamp, nonce };
Array.Sort(ArrTmp); //字典排序
string tmpStr = string.Join("", ArrTmp);
tmpStr = System.Web.Security.FormsAuthentication.HashPasswordForStoringInConfigFile(tmpStr, "SHA1");
tmpStr = tmpStr.ToLower();
if (tmpStr == signature)
{
return true;
}
else
{
return false;
}
}
public string GetSha1(System.Collections.Generic.List<string> codelist)
{
codelist.Sort();
var combostr = string.Empty;
for (int i = 0; i < codelist.Count; i++)
{
combostr += codelist[i];
}
return EncryptToSHA1(combostr);
}
public string EncryptToSHA1(string str)
{
System.Security.Cryptography.SHA1CryptoServiceProvider sha1 = new System.Security.Cryptography.SHA1CryptoServiceProvider();
byte[] str1 = System.Text.Encoding.UTF8.GetBytes(str);
byte[] str2 = sha1.ComputeHash(str1);
sha1.Clear();
(sha1 as IDisposable).Dispose();
return Convert.ToBase64String(str2);
}
public void responseMsg(string postStr)
{
System.Xml.XmlDocument postObj = new System.Xml.XmlDocument();
postObj.LoadXml(postStr);
WriteLog("responseMsg:-------" + postStr);
var FromUserNameList = postObj.GetElementsByTagName("FromUserName");
string FromUserName = string.Empty;
for (int i = 0; i < FromUserNameList.Count; i++)
{
if (FromUserNameList[i].ChildNodes[0].NodeType == System.Xml.XmlNodeType.CDATA)
{
FromUserName = FromUserNameList[i].ChildNodes[0].Value;
}
}
var toUsernameList = postObj.GetElementsByTagName("ToUserName");
string ToUserName = string.Empty;
for (int i = 0; i < toUsernameList.Count; i++)
{
if (toUsernameList[i].ChildNodes[0].NodeType == System.Xml.XmlNodeType.CDATA)
{
ToUserName = toUsernameList[i].ChildNodes[0].Value;
}
}
var keywordList = postObj.GetElementsByTagName("Content");
string Content = string.Empty;
for (int i = 0; i < keywordList.Count; i++)
{
if (keywordList[i].ChildNodes[0].NodeType == System.Xml.XmlNodeType.CDATA)
{
Content = keywordList[i].ChildNodes[0].Value;
}
}
var time = DateTime.Now;
var textpl = "<xml><ToUserName><![CDATA[" + FromUserName + "]]></ToUserName>" +
"<FromUserName><![CDATA[" + ToUserName + "]]></FromUserName>" +
"<CreateTime>" + ConvertDateTimeInt(DateTime.Now) + "</CreateTime><MsgType><![CDATA[text]]></MsgType>" +
"<Content><![CDATA[欢迎来到微信世界---" + Content + "]]></Content><FuncFlag>0</FuncFlag></xml> ";
context.Response.Write(textpl);
context.Response.End();
}
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);
}
private int ConvertDateTimeInt(System.DateTime time)
{
System.DateTime startTime = TimeZone.CurrentTimeZone.ToLocalTime(new System.DateTime(1970, 1, 1));
return (int)(time - startTime).TotalSeconds;
}
private void WriteLog(string strMemo)
{
string filename = "D:/WEBHOME/logs/log.txt";
if (!System.IO.Directory.Exists("D:/WEBHOME/logs/"))
System.IO.Directory.CreateDirectory("D:/WEBHOME/logs/");
System.IO.StreamWriter sr = null;
try
{
if (!System.IO.File.Exists(filename))
{
sr = System.IO.File.CreateText(filename);
}
else
{
sr = System.IO.File.AppendText(filename);
}
sr.WriteLine(strMemo);
}
catch
{
}
finally
{
if (sr != null)
sr.Close();
}
}
public bool IsReusable
{
get
{
return false;
}
}
}