from :https://www.jb51.net/article/73800.htm
经常看到在项目中ajax post数据到服务器不加防伪标记，造成CSRF攻击
在Asp.net Mvc里加入防伪标记很简单在表单中加入Html.AntiForgeryToken()即可。
Html.AntiForgeryToken()会生成一对加密的字符串，分别存放在Cookies 和 input 中。
我们在ajax post中也带上AntiForgeryToken
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 | @model WebApplication1.Controllers.Person @{ ViewBag.Title = "Index" ; } <h2>Index</h2> <form id= "form1" > <div class= "form-horizontal" > <h4>Persen</h4> <hr /> @Html.ValidationSummary( true , "" , new { @class = "text-danger" }) <div class= "form-group" > @Html.LabelFor(model => model.Name, htmlAttributes: new { @class = "control-label col-md-2" }) <div class= "col-md-10" > @Html.EditorFor(model => model.Name, new { htmlAttributes = new { @class = "form-control" } }) @Html.ValidationMessageFor(model => model.Name, "" , new { @class = "text-danger" }) </div> </div> <div class= "form-group" > @Html.LabelFor(model => model.Age, htmlAttributes: new { @class = "control-label col-md-2" }) <div class= "col-md-10" > @Html.EditorFor(model => model.Age, new { htmlAttributes = new { @class = "form-control" } }) @Html.ValidationMessageFor(model => model.Age, "" , new { @class = "text-danger" }) </div> </div> <div class= "form-group" > <div class= "col-md-offset-2 col-md-10" > <input type= "button" id= "save" value= "Create" class= "btn btn-default" /> </div> </div> </div> </form> <script src= "~/Scripts/jquery-1.10.2.min.js" ></script> <script src= "~/Scripts/jquery.validate.min.js" ></script> <script src= "~/Scripts/jquery.validate.unobtrusive.min.js" ></script> <script type= "text/javascript" > $( function () { //var token = $(‘[name=__RequestVerificationToken]‘); //获取防伪标记 var token = $( ‘@Html.AntiForgeryToken()‘ ).val(); var headers = {}; //防伪标记放入headers //也可以将防伪标记放入data headers[ "__RequestVerificationToken" ] = token; $( "#save" ).click( function () { $.ajax({ type: ‘POST‘ , url: ‘/Home/Index‘ , cache: false , headers: headers, data: { Name: "yangwen" , Age: "1" }, success: function (data) { alert(data) }, error: function () { alert( "Error" ) } }); }) }) </script> |
放在cookies里面的加密字符串
控制器中代码
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 | using System; using System.Collections.Generic; using System.Linq; using System.Net; using System.Web; using System.Web.Helpers; using System.Web.Mvc; namespace WebApplication1.Controllers { public class HomeController : Controller { public ActionResult Index() { return View(); } [HttpPost] [MyValidateAntiForgeryToken] public ActionResult Index(Person p) { return Json( true , JsonRequestBehavior.AllowGet); } } public class Person { public string Name { get; set; } public int Age { get; set; } } public class MyValidateAntiForgeryToken : AuthorizeAttribute { public override void OnAuthorization(AuthorizationContext filterContext) { var request = filterContext.HttpContext.Request; if (request.HttpMethod == WebRequestMethods.Http.Post) { if (request.IsAjaxRequest()) { var antiForgeryCookie = request.Cookies[AntiForgeryConfig.CookieName]; var cookieValue = antiForgeryCookie != null ? antiForgeryCookie.Value : null ; //从cookies 和 Headers 中 验证防伪标记 //这里可以加try-catch AntiForgery.Validate(cookieValue, request.Headers[ "__RequestVerificationToken" ]); } else { new ValidateAntiForgeryTokenAttribute() .OnAuthorization(filterContext); } } } } } |
这里注释掉ajax中防伪标记在请求
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | $( "#save" ).click( function () { $.ajax({ type: ‘POST‘ , url: ‘/Home/Index‘ , cache: false , // headers: headers, data: { Name: "yangwen" , Age: "1" }, success: function (data) { alert(data) }, error: function () { alert( "Error" ) } }); }) |
默认返回500的状态码。
这里修改ajax中的防伪标记
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 | $( function () { //var token = $(‘[name=__RequestVerificationToken]‘); //获取防伪标记 var token = $( ‘@Html.AntiForgeryToken()‘ ).val(); var headers = {}; //防伪标记放入headers //也可以将防伪标记放入data headers[ "__RequestVerificationToken" ] = token+11111111111111111111111111111111111; $( "#save" ).click( function () { $.ajax({ type: ‘POST‘ , url: ‘/Home/Index‘ , cache: false , headers: headers, data: { Name: "yangwen" , Age: "1" }, success: function (data) { alert(data) }, error: function () { alert( "Error" ) } }); }) }) |
也是500的状态码。
以上内容就是本文的全部叙述，切记ajax中要带上AntiForgeryToken防止CSRF攻击，小伙伴们在使用过程发现有疑问，请给我留言，谢谢！
