WebApi后台与前端防止请求重复提交

1. 操作过滤器代码

/// <summary>
/// action方法过滤器
/// </summary>
public class PlatformActionFilter : Attribute, IActionFilter
{
    private static MemoryCache cache = new MemoryCache(new MemoryCacheOptions());
    public const string hiddenToken = "hiddenToken";
    private ILog _log;
 
    public PlatformActionFilter()
    {
        this._log = LogManager.GetLogger(Startup.Repository.Name, typeof(PlatformActionFilter));
    }
 
    public void OnActionExecuted(ActionExecutedContext context)
    {
 
    }
    /// <summary>
    /// action 执行之前
    /// </summary>
    /// <param name="context"></param>
    public virtual void OnActionExecuting(ActionExecutingContext filterContext)
    {
        string httpMethod = WebUtility.HtmlEncode(filterContext.HttpContext.Request.Method);
        if (httpMethod == "POST")
        {
            //使用请求路径作为唯一key
            string path = filterContext.HttpContext.Request.Path;
            string cacheToken = $"{hiddenToken}_{path}";
            string keyValue = new Guid().ToString() + DateTime.Now.Ticks;
 
            if (path != null)
            {
                //var cache = iZen.Utils.Core.iCache.CacheManager.GetCacheValue(cacheToken);
                var cv = cache.Get(cacheToken);
                if (cv == null)
                {
                    //iZen.Utils.Core.iCache.CacheManager.SetChacheValueSeconds(cacheToken, keyValue, 1);
                    //设置缓存1秒过期
                    cache.Set(cacheToken, keyValue, new MemoryCacheEntryOptions() { SlidingExpiration = TimeSpan.FromSeconds(1) });
                    _log.Info($"提交成功");
                }
                else
                {
                    _log.Error($"{filterContext.HttpContext.Request.Method},请不要重复提交");
                    //设置了 filterContext.Result 表示返回过滤失败的结果
                    //filterContext.Result = new BadRequestObjectResult(filterContext.ModelState);
                    filterContext.Result = new BadRequestObjectResult("请不要重复提交");
                }
 
            }
            return;
        }
        this.OnActionExecuting(filterContext);
    }
}

1. 在Controller类或Action方法上添加过滤器特性

/// <summary>
/// 测试重复提交过滤器
/// </summary>
/// <returns></returns>
[PlatformActionFilter]
[HttpPost]
public JsonResult TestPost()
{
    var result = new ResultModel() { IsSuccess = true, Info = "测试重复提交" };
    return Json(result);
}