Created
June 7, 2018 07:11
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Change JWT Filter with optional Authentication
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package com.seelix.api.security.jwt; | |
import java.io.IOException; | |
import javax.servlet.FilterChain; | |
import javax.servlet.ServletException; | |
import javax.servlet.ServletRequest; | |
import javax.servlet.ServletResponse; | |
import javax.servlet.http.HttpServletRequest; | |
import org.springframework.security.core.context.SecurityContextHolder; | |
import org.springframework.util.StringUtils; | |
import org.springframework.web.filter.GenericFilterBean; | |
/** | |
* Filters incoming requests and installs a Spring Security principal if a | |
* header corresponding to a valid user is found. | |
*/ | |
public class JWTFilter extends GenericFilterBean { | |
private TokenProvider tokenProvider; | |
public JWTFilter(TokenProvider tokenProvider) { | |
this.tokenProvider = tokenProvider; | |
} | |
@Override | |
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) | |
throws IOException, ServletException { | |
HttpServletRequest httpServletRequest = (HttpServletRequest) servletRequest; | |
String jwt = resolveToken(httpServletRequest); | |
if (StringUtils.hasText(jwt)) { | |
this.tokenProvider.getAuthentication(jwt) | |
.ifPresent(authentication -> SecurityContextHolder.getContext().setAuthentication(authentication)); | |
} | |
filterChain.doFilter(servletRequest, servletResponse); | |
} | |
private String resolveToken(HttpServletRequest request) { | |
String bearerToken = request.getHeader(JWTConfigurer.AUTHORIZATION_HEADER); | |
if (StringUtils.hasText(bearerToken) && bearerToken.startsWith("Bearer ")) { | |
return bearerToken.substring(7, bearerToken.length()); | |
} | |
return null; | |
} | |
} |
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