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User Authentication(Login) and,

Pragya Keshap answered on February 20, 2023 Popularity 3/10 Helpfulness 1/10

answer User Authentication(Login) and,

User Authentication(Login) and,

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public class AuthorizationFilter extends BasicAuthenticationFilter {
    
	Environment environment;

    public AuthorizationFilter(AuthenticationManager authManager, Environment environment) {
        super(authManager);
        this.environment = environment;
    }
    
    
    @Override
    protected void doFilterInternal(HttpServletRequest req,
            HttpServletResponse res,
            FilterChain chain) throws IOException, ServletException {

        String authorizationHeader = req.getHeader(environment.getProperty("authorization.token.header.name"));

        if (authorizationHeader == null || !authorizationHeader.startsWith(environment.getProperty("authorization.token.header.prefix"))) {
            chain.doFilter(req, res);
            return;
        }

        UsernamePasswordAuthenticationToken authentication = getAuthentication(req);
       
        SecurityContextHolder.getContext().setAuthentication(authentication);
        chain.doFilter(req, res);
    }  
    
    private UsernamePasswordAuthenticationToken getAuthentication(HttpServletRequest req) {
        String authorizationHeader = req.getHeader(environment.getProperty("authorization.token.header.name"));
   
         if (authorizationHeader == null) {
             return null;
         }

         String token = authorizationHeader.replace(environment.getProperty("authorization.token.header.prefix"), "");

         String userId = Jwts.parser()
                 .setSigningKey(environment.getProperty("token.secret"))
                 .parseClaimsJws(token)
                 .getBody()
                 .getSubject();

         if (userId == null) {
             return null;
         }
   
         return new UsernamePasswordAuthenticationToken(userId, null, new ArrayList<>());

     }
}

Popularity 3/10 Helpfulness 1/10 Language java

Source: Grepper

Tags: java

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Contributed on Feb 20 2023

Pragya Keshap

0 Answers Avg Quality 2/10

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