ASP.NET MVC 微信公共平台开发

验证消息的真实性

1. 在MVC Controller所在项目中添加过滤器，在过滤器中重写

   public override void OnActionExecuting(ActionExecutingContext filterContext)方法

1. 新建数据模型

   

   注：服务器接收消息时，不再是signature而是msg_signature

2. 方法重写，实现对消息的验证

   调用微信接入时验证的方法，不过参数需要小改动一下，采用新建的数据模型

    

   

    

   

3. 在Action方法或在Controller上添加过滤器属性

    

   

4. 代码示例
   

    1     /// <summary>
    2     /// 微信推送消息模型
    3     /// </summary>
    4     public class WeChatMsgRequestModel
    5     {
    6         public string timestamp { get; set; }
    7         public string nonce { get; set; }
    8 
    9         public string msg_signature { get; set; }
   10     }

   Model
   

    1 public class WeChatRequestValidAttribute : ActionFilterAttribute
    2     {
    3         private const string Token = "StupidMe";
    4 
    5         public override void OnActionExecuting(ActionExecutingContext filterContext)
    6         {
    7             //参数适配
    8             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"] };
    9             //验证
   10             if (CheckSignature(model))
   11             {
   12                 base.OnActionExecuting(filterContext);
   13             }            
   14         }
   15 
   16         private bool CheckSignature(Model.FormatModel.WeChatMsgRequestModel model)
   17         {
   18             string signature, timestamp, nonce, tempStr;
   19             //获取请求来的参数
   20             signature = model.msg_signature;
   21             timestamp = model.timestamp;
   22             nonce = model.nonce;
   23             //创建数组，将 Token, timestamp, nonce 三个参数加入数组
   24             string[] array = { Token, timestamp, nonce };
   25             //进行排序
   26             Array.Sort(array);
   27             //拼接为一个字符串
   28             tempStr = String.Join("", array);
   29             //对字符串进行 SHA1加密
   30             tempStr = FormsAuthentication.HashPasswordForStoringInConfigFile(tempStr, "SHA1").ToLower();
   31             //判断signature 是否正确
   32             if (tempStr.Equals(signature))
   33             {
   34                 return true;
   35             }
   36             else
   37             {
   38                 return false;
   39             }
   40         }
   41     }

   Filter
   

    1        
    2         /// <summary>
    3         /// 日志助手
    4         /// </summary>
    5         private static Common.LogHelper logger = new Common.LogHelper(typeof(HomeController));
    6 
    7         [Filters.WeChatRequestValid]
    8         public void Valid(Model.FormatModel.WeChatMsgRequestModel model)
    9         {
   10             if (ModelState.IsValid)
   11             {
   12                 try
   13                 {
   14                     //判断是否是POST请求
   15                     if (HttpContext.Request.HttpMethod.ToUpper() == "POST")
   16                     {
   17                         //从请求的数据流中获取请求信息
   18                         using (Stream stream = HttpContext.Request.InputStream)
   19                         {
   20                             byte[] postBytes = new byte[stream.Length];
   21                             stream.Read(postBytes, 0, (int)stream.Length);
   22                             string postString = System.Text.Encoding.UTF8.GetString(postBytes);
   23                             Handle(postString,model);
   24                         }
   25                     }
   26                 }
   27                 catch (Exception ex)
   28                 {
   29                     logger.Error("发生异常,异常信息：" + ex.Message + ex.StackTrace);
   30                 }
   31             }
   32         }            

   Controller Code

    

ASP.NET MVC 微信公共平台开发之验证消息的真实性