asp.net开发微信公众平台之验证消息的真实性-尊龙凯时

/// 

  /// 微信推送消息模型
  /// 
  public class wechatmsgrequestmodel
  {
    public string timestamp { get; set; }
    public string nonce { get; set; }
    public string msg_signature { get; set; }
  }

public class wechatrequestvalidattribute : actionfilterattribute
  {
    private const string token = "stupidme";
    public override void onactionexecuting(actionexecutingcontext filtercontext)
    {
      //参数适配
      model.formatmodel.wechatmsgrequestmodel model = new model.formatmodel.wechatmsgrequestmodel() { nonce= filtercontext.httpcontext.request.querystring["nonce"],msg_signature= filtercontext.httpcontext.request.querystring["msg_signature"],timestamp= filtercontext.httpcontext.request.querystring["timestamp"] };
      //验证
      if (checksignature(model))
      {
        base.onactionexecuting(filtercontext);
      }      
    }
    private bool checksignature(model.formatmodel.wechatmsgrequestmodel model)
    {
      string signature, timestamp, nonce, tempstr;
      //获取请求来的参数
      signature = model.msg_signature;
      timestamp = model.timestamp;
      nonce = model.nonce;
      //创建数组，将 token, timestamp, nonce 三个参数加入数组
      string[] array = { token, timestamp, nonce };
      //进行排序
      array.sort(array);
      //拼接为一个字符串
      tempstr = string.join("", array);
      //对字符串进行 sha1加密
      tempstr = formsauthentication.hashpasswordforstoringinconfigfile(tempstr, "sha1").tolower();
      //判断signature 是否正确
      if (tempstr.equals(signature))
      {
        return true;
      }
      else
      {
        return false;
      }
    }
  }

/// 

    /// 日志助手
    /// 
    private static common.loghelper logger = new common.loghelper(typeof(homecontroller));
    [filters.wechatrequestvalid]
    public void valid(model.formatmodel.wechatmsgrequestmodel model)
    {
      if (modelstate.isvalid)
      {
        try
        {
          //判断是否是post请求
          if (httpcontext.request.httpmethod.toupper() == "post")
          {
            //从请求的数据流中获取请求信息
            using (stream stream = httpcontext.request.inputstream)
            {
              byte[] postbytes = new byte[stream.length];
              stream.read(postbytes, 0, (int)stream.length);
              string poststring = system.text.encoding.utf8.getstring(postbytes);
              handle(poststring,model);
            }
          }
        }
        catch (exception ex)
        {
          logger.error("发生异常,异常信息："   ex.message   ex.stacktrace);
        }
      }
    }