Package com.example.blogs.app.security

Class JwtExceptionFilter

java.lang.Object

org.springframework.web.filter.GenericFilterBean

org.springframework.web.filter.OncePerRequestFilter

com.example.blogs.app.security.JwtExceptionFilter

All Implemented Interfaces:

jakarta.servlet.Filter, Aware, BeanNameAware, DisposableBean, InitializingBean, EnvironmentAware, EnvironmentCapable, ServletContextAware

@Component
public class JwtExceptionFilter
extends OncePerRequestFilter

Catches JWT exceptions thrown during request processing and writes error responses.

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
JwtExceptionFilter()

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 requests and catches JWT exceptions to write standardized error responses.

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

JwtExceptionFilter

public JwtExceptionFilter()

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 requests and catches JWT exceptions to write standardized error responses. Allows the filter chain to continue for non-JWT exceptions.

Specified by:

doFilterInternal in class OncePerRequestFilter

Parameters:

request - the HTTP request

response - the HTTP response

filterChain - the filter chain to continue

Throws:

jakarta.servlet.ServletException - if servlet processing fails

IOException - if I/O operation fails