C#微信公众号/订阅号开发 接口源码

using System;
using System.Web;
using System.IO;
using System.Text;
using System.Web.Security;
using weixin_api;

public class wxgz_api : IHttpHandler
{
    public void ProcessRequest(HttpContext context)
    {
        context.Response.ContentType = "text/plain";
        string postString = string.Empty;
        if (HttpContext.Current.Request.HttpMethod.ToUpper() == "POST")
        {
            //微信服务器对接口消息
            using (Stream stream = HttpContext.Current.Request.InputStream)
            {
                Byte[] postBytes = new Byte[stream.Length];
                stream.Read(postBytes, 0, (Int32)stream.Length);
                postString = Encoding.UTF8.GetString(postBytes);
                Handle(postString);
            }
        }
        else
        {
            //微信进行的Get测试(开发者认证)
            WxAuth();
        }
    }

    /// <summary>
    /// 处理信息并应答
    /// </summary>
    private void Handle(string postStr)
    {
        messageHelp help = new messageHelp();
        string responseContent = help.ReturnMessage(postStr);

        HttpContext.Current.Response.ContentEncoding = Encoding.UTF8;
        HttpContext.Current.Response.Write(responseContent);
    }

    #region 微信验证
    public void WxAuth()
    {
        string token = "xxxxxxxx";
        if (string.IsNullOrEmpty(token))
        {
            return;
        }
        string echoString = HttpContext.Current.Request.QueryString["echostr"];
        string signature = HttpContext.Current.Request.QueryString["signature"];
        string timestamp = HttpContext.Current.Request.QueryString["timestamp"];
        string nonce = HttpContext.Current.Request.QueryString["nonce"];
        if (CheckSignature(token, signature, timestamp, nonce))
        {
            if (!string.IsNullOrEmpty(echoString))
            {
                HttpContext.Current.Response.Write(echoString);
                HttpContext.Current.Response.End();
            }
        }
    }

    /// <summary>
    /// 验证微信签名
    /// </summary>
    public bool CheckSignature(string token, string signature, string timestamp, string nonce)
    {
        string[] ArrTmp = { token, timestamp, nonce };
        Array.Sort(ArrTmp);
        string tmpStr = string.Join("", ArrTmp);
        tmpStr = FormsAuthentication.HashPasswordForStoringInConfigFile(tmpStr, "SHA1");
        tmpStr = tmpStr.ToLower();
        if (tmpStr == signature)
        {
            return true;
        }
        else
        {
            return false;
        }
    }
    #endregion

    public bool IsReusable
    {
        get
        {
            return false;
        }
    }
}