Class JwtFilter

java.lang.Object

org.springframework.web.filter.GenericFilterBean

org.springframework.web.filter.OncePerRequestFilter

com.needleandstitch.pavuk.security.JwtFilter

All Implemented Interfaces:

jakarta.servlet.Filter, org.springframework.beans.factory.Aware, org.springframework.beans.factory.BeanNameAware, org.springframework.beans.factory.DisposableBean, org.springframework.beans.factory.InitializingBean, org.springframework.context.EnvironmentAware, org.springframework.core.env.EnvironmentCapable, org.springframework.web.context.ServletContextAware

@Component
public class JwtFilter
extends org.springframework.web.filter.OncePerRequestFilter

Filter for JWT token validation.

Since:

15.12.2024

Version:

1.0.0

Author:

Needle & Stitch

Field Summary

Fields inherited from class org.springframework.web.filter.OncePerRequestFilter

ALREADY_FILTERED_SUFFIX

Fields inherited from class org.springframework.web.filter.GenericFilterBean

logger

Constructor Summary

Constructors

Constructor	Description
JwtFilter(JwtUtil jwtUtil, UserRepository userRepository)	Filter constructor.

Method Summary

Modifier and Type	Method	Description
protected void	doFilterInternal(jakarta.servlet.http.HttpServletRequest request, jakarta.servlet.http.HttpServletResponse response, jakarta.servlet.FilterChain filterChain)	Filters the request to check for a valid JWT token.

Methods inherited from class org.springframework.web.filter.OncePerRequestFilter

doFilter, doFilterNestedErrorDispatch, getAlreadyFilteredAttributeName, isAsyncDispatch, isAsyncStarted, shouldNotFilter, shouldNotFilterAsyncDispatch, shouldNotFilterErrorDispatch

Methods inherited from class org.springframework.web.filter.GenericFilterBean

addRequiredProperty, afterPropertiesSet, createEnvironment, destroy, getEnvironment, getFilterConfig, getFilterName, getServletContext, init, initBeanWrapper, initFilterBean, setBeanName, setEnvironment, setServletContext

Methods inherited from class java.lang.Object

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

Constructor Details

JwtFilter

public JwtFilter(JwtUtil jwtUtil,
 UserRepository userRepository)

Filter constructor.

Parameters:

jwtUtil - The utility class for JWT operations

userRepository - The repository for fetching user details

Method Details

doFilterInternal

protected void doFilterInternal(jakarta.servlet.http.HttpServletRequest request,
 jakarta.servlet.http.HttpServletResponse response,
 jakarta.servlet.FilterChain filterChain)
                         throws jakarta.servlet.ServletException,
IOException

Filters the request to check for a valid JWT token.

This method retrieves the JWT token from the request cookies, validates it, and if valid, extracts the user's email from the token. It then loads the user from the database and sets the authentication context for the request.

Specified by:

doFilterInternal in class org.springframework.web.filter.OncePerRequestFilter

Parameters:

request - The HTTP request

response - The HTTP response

filterChain - The filter chain to pass the request to the next filter

Throws:

jakarta.servlet.ServletException - if an error occurs during filter processing

IOException - if an I/O error occurs during filter processing