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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;

}

}

}