Release date:Updated on: 2012-09-04
Affected Systems:Apache Group Struts 2.xDescription:--------------------------------------------------------------------------------Apache Struts is an open-source web application framework for developing Java Web applications.
Apache Struts earlier than version 2.3.4.1 has a security vulnerability that can be exploited by ma
In general, the action of struts1 is a singleton mode, so developers must ensure that it is thread-safe or synchronous, because in struts 1, each action has only one instance to process all requests.
However, the thread security issue is not taken into account when struts 1 is used for development. This is because w
, and the problem is more difficult to find in testing
2:singlethreadmodel
Modify the servlet as follows
public class UserId extends HttpServlet implements singlethreadmodel{
If the server implements Singlethreadmodel by queuing all requests, it can work, but if the village is heavily accessed concurrently, this approach can result in significant performance losses.
If the server implements Singlethreadmodel by generating multiple instances of the servlet. This approach will fail completely beca
1. Introduction
1.1 Model-View-controller (MVC) Design Mode
Fixme-a general introduction to this mode is required. For more information, see design patterns of the Mechanical Industry Press.
1.2 map MVC concepts to struts Components
The struts architecture implements the concept of Model-View-controller design mode, which maps these concepts to the components
the normal operation of Internet cafes and have destructive power on the billing system. In general, the technical vulnerabilities of Internet cafes mainly fall into the following categories:
1. Internet browser-based technical vulnerabilities: As we all know, in Windows, Internet era, Internet Explorer has become a "curse ", many
, this also means that you must rewrite your application.◆ Add AJAX to your existing Struts application. Since AJAX is only a technology rather than a framework, it is easy to integrate into Struts. As an existing system, its stability, such as maintaining existing library files, is very important. Therefore, this method is recommended and will be detailed later.
The advantages of adding AJAX to
separately as Model 1).
Of course, there is nothing new here, and JSP Model 2 is quickly pointed out to follow the traditional model-view-control design approach abstracted from the old Smarttalk MVC framework. Java Web Developers now tend to think that the concept of Model 2 and MVC is interoperable. In this manual, we use an example of MVC to describe the architecture of struts, which is named Model 2/M
Keywords: Eclipse, myeclipse, struts, Java
Preface
This article describes in detail how to configure and develop struts in eclipse Based on the instance. I have seen many such articles on the Internet before, and many netizens have asked such questions. Therefore, I want to write a detailed article based on my actual experience and examples. One is to help you, and the other is to test your knowledge.
This
Before AJAX is used
Currently, most Struts applications use the standard "web page like a flat document" structure. If you want to imitate some desktop applications (such as those created using Java Swing, Visual Basic, or Delphi), you have two options: you can send all the information that may be requested as part of the page, and use a large amount of JavaScript to operate on its dynamic display (a very slow and non-enterprise-level Java method ); o
Struts and tiles assist in component-based development (1)
Combine views to facilitate web application Construction
The "Model-View-controller (MVC)" framework is used to generate modular applications (these applications can clearly divide the logic, style, and data ), is a proven and convenient method. In the Java World, Struts is one of the most famous and fre
that the existence of Jsp,servlet can help users solve most problems, but because of their coding on the development of the project has brought a lot of inconvenience, reusability is also poor, So struts came into being to help users solve these problems in the shortest possible time. The Struts framework provides the following services:(1) as a servlet for the
This series of tutorials will detail the fundamentals and usage of struts 1.x, and readers can see the same points and differences between struts 1.x and struts 2.x in the Struts 2 series tutorial.
First, this article gives the p
vulnerabilities:
1. Use port 25 to teach k! B5T4gc8GAk; P7c6 hackers can search for SMTP servers to forward spam.
Port 2. 25 is opened by many Trojans, such as Ajan, Antigen, Email Password Sender, ProMail, trojan, Tapiras, Terminator, WinPC, and WinSpy. For WinSpy,
8w5, I +? I1 % W6 in EA I
By enabling port 25, you can monitor all windows and modules running on your computer.
Operation suggestion: if you
configure a struts application in three steps.
1. register the tag library in the deployment descriptor (Web. xml file):
The above code tells the servlet container about the struts HTML Tag library and where to find the TLD file of the tag library.
2. Be sure to copy the struts-html.tld file to the WEB-INF directory.
1.struts Development Steps
The introduction of struts's jar package;
The core functions of struts are introduced in Web. XML, and the Struts core filter is configured.
Development action, generally inherited from Actionsupport, the business method must return a string type, the method cannot have param
Common security vulnerabilities and defense in Financial Industry platforms (1)
I. Preface
Internet finance is an emerging term in the financial industry over the past two years and an important branch of the Internet industry. However, internet finance is not a simple combination of the Internet and the financial industry, instead, it is a new model and business created to meet new requirements after bein
vulnerabilities. In this way, attackers can find various TCP ports on the server, services provided, Web service software versions, and these services and security vulnerabilities. For system administrators, if they can detect and stop these behaviors in time, they can also greatly reduce the incidence of intrusion events. According to general standards, vulnerability scanners can be divided into two types
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