Package filter

Class AuthenticationFilter

java.lang.Object

filter.AuthenticationFilter

All Implemented Interfaces:

javax.servlet.Filter

public class AuthenticationFilter
extends Object
implements javax.servlet.Filter

Filter that checks Authentication and Authorization Redirects unauthenticated users to login page Enforces role based access control

Author:

TAMIL MUGHILAN

Field Summary

Fields

Modifier and Type	Field	Description
private static final Set<String>	openPaths

Constructor Summary

Constructors

Constructor	Description
AuthenticationFilter()

Method Summary

Modifier and Type	Method	Description
void	destroy()	Cleans up resources when filter is destroyed.
void	doFilter(javax.servlet.ServletRequest request, javax.servlet.ServletResponse response, javax.servlet.FilterChain chain)	Processes requests to check Authentication and Authorization.
void	init(javax.servlet.FilterConfig fConfig)	Initializes the filter when application starts.
private boolean	isStaticResource(String path)	Checks if the requested path is a static resource.
private void	redirectBasedOnRole(String role, javax.servlet.http.HttpServletResponse response, String contextPath)	Redirects user to appropriate page based on their role.
private void	sendAccessDenied(javax.servlet.http.HttpServletResponse response, String message)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

openPaths

private static final Set<String> openPaths

Constructor Details

AuthenticationFilter

public AuthenticationFilter()

Method Details

doFilter

public void doFilter(javax.servlet.ServletRequest request,
 javax.servlet.ServletResponse response,
 javax.servlet.FilterChain chain)
              throws IOException,
javax.servlet.ServletException

Processes requests to check Authentication and Authorization. Allows access based on user role and user requests.

Specified by:

doFilter in interface javax.servlet.Filter

Parameters:

request - the servlet request

response - the servlet response

chain - the filter chain

Throws:

IOException - if an I/O error occurs

javax.servlet.ServletException - if a servlet error occurs

isStaticResource

private boolean isStaticResource(String path)

Checks if the requested path is a static resource.

Parameters:

path - the request path to check

Returns:

true if it's a static resource, false otherwise

redirectBasedOnRole

private void redirectBasedOnRole(String role,
 javax.servlet.http.HttpServletResponse response,
 String contextPath)
                          throws IOException

Redirects user to appropriate page based on their role.

Parameters:

role - the user's role

response - the HTTP response

contextPath - the application context path

Throws:

IOException - if redirection fails

sendAccessDenied

private void sendAccessDenied(javax.servlet.http.HttpServletResponse response,
 String message)
                       throws IOException

Throws:

IOException

init

public void init(javax.servlet.FilterConfig fConfig)

Initializes the filter when application starts.

Specified by:

init in interface javax.servlet.Filter

Parameters:

fConfig - the filter configuration

destroy

public void destroy()

Cleans up resources when filter is destroyed.

Specified by:

destroy in interface javax.servlet.Filter