void Application_BeginRequest(object sender, EventArgs e)  
  {
    try { 
      string session_param_name = "ASPSESSID"; 
      string session_cookie_name = "ASP.NET_SessionId"; 
      if (HttpContext.Current.Request.Form[session_param_name] != null) 
      { 
        UpdateCookie(session_cookie_name, HttpContext.Current.Request.Form[session_param_name]); 
      } 
      else if (HttpContext.Current.Request.QueryString[session_param_name] != null) 
      { 
        UpdateCookie(session_cookie_name, HttpContext.Current.Request.QueryString[session_param_name]); 
      } 
    }
    catch { 
    } 

    //此处是身份验证
    try { 
      string auth_param_name = "AUTHID"; 
      string auth_cookie_name = FormsAuthentication.FormsCookieName; 
      if (HttpContext.Current.Request.Form[auth_param_name] != null) 
      { 
        UpdateCookie(auth_cookie_name, HttpContext.Current.Request.Form[auth_param_name]); 
      } 
      else if (HttpContext.Current.Request.QueryString[auth_param_name] != null) 
      { 
        UpdateCookie(auth_cookie_name, HttpContext.Current.Request.QueryString[auth_param_name]);
      } 
    }
    catch { }
  }

  private void UpdateCookie(string cookie_name, string cookie_value)
  {
    HttpCookie cookie = HttpContext.Current.Request.Cookies.Get(cookie_name);
    if (null == cookie)
    {
      cookie = new HttpCookie(cookie_name);
    }
    cookie.Value = cookie_value;
    HttpContext.Current.Request.Cookies.Set(cookie);//重新设定请求中的cookie值，将服务器端的session值赋值给它
  }

 　　this.hfAuth.Value = Request.Cookies[FormsAuthentication.FormsCookieName] == null "htmlcode">

  InitUpload: function(auth, AspSessID) {
    $("#uploadify").uploadify({
      uploader: 'Scripts/jqueryplugins/Infrastructure/uploadify.swf',
      script: 'Handlers/ResourceHandler.ashx"color: #ff0000">2.C#环境下

以上是asp.net下的解决方法，那么C#中应该如何处理呢？
我是这样解决的，这样所有上传文件的代码都不需要修改，改动量最小，但是有安全隐患：


if (this.LoginInfo == null)
{
  // 解决uploadify兼容火狐谷歌浏览器上传问题
  // 但是，此代码使系统有安全隐患，Flash程序请求该系统不需要验证
  // 要解决此安全隐患，需要Flash程序传用户名和密码过来验证，但是该用户名和密码不能写在前端以便被不法用户看到
  if (Request.UserAgent == "Shockwave Flash")
  {
    return;
  }
  else
  {
    filterContext.Result = RedirectToAction("LoginAgain", "Account", new { Area = "Auth" });
    return;
  }
}




我们的系统是ASP.NET MVC的，虽说通过加密的方式可以让用户看不到敏感信息，但恶意用户不需要把敏感信息解密出来就可绕过系统验证。
验证信息不能直接写前台，可以用ajax从后台获取验证信息，然后传给flash，然后在拦截器中验证。
修改后：
JS代码：
ajax请求后台获取用户名，传给flash


$(function () {
  $.ajax({
    url: "/Auth/Account/GetUserNamePwd",
    type: "POST",
    dataType: "json",
    data: {},
    success: function (data) {
      $("#uploadify").uploadify({
        height: 25,
        width: 100,
        swf: '/Content/Plugins/UploadifyJs/uploadify.swf',
        uploader: 'UploadFile',
        formData: {
          userName: data.data.userName, //ajax获取的用户名
          pwd: data.data.pwd //ajax获取的密码
        },
        buttonText: '选择文件上传',
        fileSizeLimit: '4MB',
        fileTypeDesc: '文件',
        fileTypeExts: '*.*',
        queueID: 'fileQueue',
        multi: true,
        onUploadSuccess: function (fileObj, data, response) {
          var d = eval("(" + data + ")");
          $(".uploadify-queue-item").find(".data").html("  上传完成");
          $("#url").val(d.url);
          $("#name").val(d.name);
        },
        onUploadError: function (event, ID, fileObj, errorObj) {
          if (event.size > 4 * 1024 * 1024) {
            alert('超过文件上传大小限制（4M）！');
            return;
          }
          alert('上传失败');
        }
      }); //end uploadify
    }
  });
});    //end $




拦截器中代码：


......
if (this.LoginInfo == null)
{ 
  // 解决uploadify兼容火狐谷歌浏览器上传问题
  // 但是，此代码使系统有安全隐患，Flash程序请求该系统不需要验证
  // 要解决此安全隐患，需要Flash程序传用户名和密码过来验证，但是该用户名和密码不能写在前端以便被不法用户看到
  if (Request.UserAgent == "Shockwave Flash")
  {
    string userName = Request.Params["userName"];
    string pwd = Request.Params["pwd"];
    if (!string.IsNullOrWhiteSpace(userName) && !string.IsNullOrWhiteSpace(pwd))
    {
      AuthDAL authDAL = new AuthDAL();
      sys_user user = authDAL.GetUserInfoByName(userName);
      if (user != null && user.password == pwd)
      {
        return;
      }
    }
  }
  else
  {
    filterContext.Result = RedirectToAction("LoginAgain", "Account", new { Area = "Auth" });
    return;
  }
}
......



3.jsp版解决方法


<%@ page language="java" contentType="text/html; charset=UTF-8"
  pageEncoding="UTF-8"%>
  
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">


<%
	String syscontext = request.getContextPath();

%>

<% 
  String path = request.getContextPath(); 
  String basePath = request.getScheme() + "://" 
      + request.getServerName() + ":" + request.getServerPort() 
      + path; 
  
  String sessionid = session.getId();
  
%>

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<link rel="stylesheet" type="text/css" href="<%=syscontext %>/webcontent/resourceManage/wallpapaer/uploadify/uploadify.css" />
<script type="text/javascript" src="/UploadFiles/2021-04-02/jquery-1.7.2.min.js">

总结
简单的说，最终的解决办法就是可以在每个引用的文件后面加个随机数，让它每次请求都带个参数，该问题则自动解决

                                
                                

                                    jQuery,uploadify,无法上传