Use Waffle framework to implement user certification and authorization in the Java class library
Use Waffle framework to implement user certification and authorization in the Java class library
Introduction:
In many web applications, user certification and authorization are indispensable part.Waffle is a Java class library for Windows integrated authentication. It can achieve user authentication and authorization by providing simple API interfaces.This article will introduce how to use the WAFFLE framework to implement user certification and authorization in the Java class library, and provide corresponding Java code examples.
Step 1: Add the dependencies of Waffle
First, add the dependencies of Waffle to the project.You can add the following dependencies in the project construction tool (such as Maven or Gradle):
Maven:
<dependency>
<groupId>com.github.dblock</groupId>
<artifactId>waffle-core</artifactId>
<version>1.9.0</version>
</dependency>
Gradle:
groovy
dependencies {
implementation 'com.github.dblock:waffle-core:1.9.0'
}
Step 2: Configure web.xml
The next step is to configure Waffle in the web.xml file of the web application.Add the following in this file:
<filter>
<filter-name>SecurityFilter</filter-name>
<filter-class>waffle.servlet.NegotiateSecurityFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>SecurityFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
Step 3: Create a controller class
Now, we can create a controller class to handle user certification and authorization.The following is a simple example controller class code:
import waffle.windows.auth.impl.WindowsAuthProviderImpl;
import waffle.windows.auth.impl.WindowsIdentityImpl;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.security.Principal;
public class AuthController extends HttpServlet {
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
WindowsAuthProviderImpl provider = new WindowsAuthProviderImpl();
WindowsIdentityImpl identity = (WindowsIdentityImpl) provider.logonUser();
if (identity != null) {
// Get user principal
Principal principal = identity.getPrincipal();
// Organize the authorization
boolean hasPermission = checkPermission(principal);
if (hasPermission) {
// The user has the permissions and executes the corresponding operation
response.getWriter (). Println ("User certification and authorization success!");
} else {
// The user has no authority and returns the corresponding error page
response.senderror (httpservletresponse.sc_forbidden, "No permission to access the resource!");););
}
} else {
// User authentication fails, return to the login page
response.sendRedirect("/login");
}
}
private boolean checkPermission(Principal principal) {
// Here the authorization check according to the user Principal (for example, check the user's role or permissions)
// If the user has the authority, return True; otherwise, return False
Return true; // Here just simply return True, you need to achieve yourself according to the actual situation yourself
}
}
Step 4: Deployment and running applications
Finally, the application is deployed into the web server and the application is activated.When users access the protected resources in the application, Waffle will verify the user identity through Windows integration authentication and use the code in the controller class for authorization check.If the user passes the certification and authorization inspection, the corresponding operation can be performed.If the user fails to pass the certification or authorization check, the corresponding error message will be returned.
Summarize:
Through this article, you have learned how to use the WAFFLE framework to implement user certification and authorization in the Java class library.By adding Waffle's dependencies, configuration web.xml, writing controller class, deployment and running applications, you can easily implement user authentication and authorization functions.You can then customize the authorization inspection according to actual needs and handle it in the application accordingly.
I hope this article will help you understand and use the WAFFLE framework!
