(C #) detects real file types

Source: Internet
Author: User

The website was uploaded to a. Asa file, and its suffix was changed to. rar, which then escaped my simple suffix judgment.
As a result, the website is infected with Trojans. Fortunately, it is not difficult. Now the real file type has been added and the security is much higher.

Meteorology <% @ Page Language = "C #" AutoEventWireup = "true" CodeFile = "TrueFile. aspx. cs" Inherits = "test_TrueFile" %>

<! DOCTYPE html PUBLIC "-// W3C // dtd xhtml 1.0 Transitional // EN" "">

<Html xmlns = "">
<Head runat = "server">
<Title> No title page </title>
<Form id = "form1" runat = "server">
<Asp: FileUpload ID = "uploadFile" runat = "server"/>
<Asp: Button ID = "btnOk" runat = "server" Text = "judge" OnClick = "btnOk_Click"/>



Meteorology Using System;
Using System. Data;
Using System. Configuration;
Using System. Collections;

Related Article

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.