.NET 微信开放平台接口

<%@ 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;

        }

    }

}

 

1.如果是为了验证微信接口的token是否通过, 将valid注释去掉

2.如果要返回给用户值, 注释掉valid