[英]MVC Anti-forgery Token won't allow multiple file upload when posting through AJAX
我知道上传多个文件效果很好,因为当我注释掉[ValidateAntiForgeryToken]
我可以选择多个文件,并且它们将被上传而没有任何预期的问题。
但是,当我放回[ValidateAntiForgeryToken]
If I select 2 or more files
,则会收到服务器500 status error
并且没有文件上传。
此外,我还会添加错误: Failed to load resource: the server responded with a status of 500 (Internal Server Error)
,堆栈跟踪表明它已停止在上line 1 of Upload action
但是,如果我选择1个文件,则文件上传成功,并且status code 200
。
我对此还很陌生-我不知道怎么了。 我感谢对这个谜的任何帮助。 :-)
这是我的控制器动作:
[HttpPost]
[ValidateAntiForgeryToken] // If I comment this out, everything works as intended
public ActionResult Upload()
{
for (int i = 0; i < Request.Files.Count; i++)
{
var file = Request.Files[i];
var fileName = Path.GetFileName(file.FileName);
var path = Path.Combine(Server.MapPath("~/Some/FilePath"), fileName);
file.SaveAs(path);
}
return Json(new { success = true, responseText = "Success!" }, JsonRequestBehavior.AllowGet); //This is placeholder, I'll implement validation later
}
HTML:
@Html.TextBoxFor(model => model.file, new { type = "file", id = "file-upload", multiple="multiple" })
@Html.ValidationMessageFor(model => model.file, "", new { @class = "text-danger" })
<div id="selectedFiles"></div>
我构建了自定义文件Array,因此可以使用精美的删除文件功能。 这是我如何调用UploadAjax
函数:
var storedFiles = []; //this is what I pass to it.
$("#stupidTest").click(function () {
UploadAjax(storedFiles);
});
jQuery,AJAX。 这是上传功能。
function UploadAjax(storedFilesArray) {
var formData = new FormData();
for (let i = 0; i < storedFilesArray.length; i++) {
let file = storedFilesArray[i];
formData.append('__RequestVerificationToken', getToken()); //appends the value to the formData.
formData.append("file-upload", file);
}
$.ajax({
type: "POST",
dataType: 'json',
cache: false,
url: '/Home/Upload',
data: formData,
contentType: false,
processData: false,
success: function (response) {
...
},
error: function (response) {
...
}
});
}
**Edit: Found that this happened at the same second my multiple file upload request failed**
System.Web.Mvc.HttpAntiForgeryException: The anti-forgery token could not be
decrypted. If this application is hosted by a Web Farm or cluster, ensure that
all machines are running the same version of ASP.NET Web Pages and that the
<machineKey> configuration specifies explicit encryption and validation keys.
AutoGenerate cannot be used in a cluster.
将此行移出循环(并将其置于循环的上方或下方):
formData.append('__RequestVerificationToken', getToken()); //appends the value to the formData.
append
将继续添加到提交给服务器的__RequestVerificationToken
值上。 一旦将其附加到一次(即,如果您选择了2个或更多文件),则该值将不是有效的XSRF防伪令牌。 然后它无法验证,因此您在服务器上收到错误。
也许您应该设置formData.append('__RequestVerificationToken', getToken());
周期外?
var formData = new FormData();
formData.append('__RequestVerificationToken', getToken()); //appends the value to the formData.
for (let i = 0; i < storedFilesArray.length; i++) {
let file = storedFilesArray[i];
formData.append("file-upload", file);
}
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