TODO#129597，建立後臺Spring boot專案

wayne

2021-11-02 9b890d3e1b373bd3dfefd06199178134353dcb06

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package com.pollex.pam.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.Authentication;
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 {
 
    public static final String AUTHORIZATION_HEADER = "Authorization";
 
    public static final String AUTHORIZATION_TOKEN = "access_token";
 
    private final 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.validateToken(jwt)) {
            Authentication authentication = this.tokenProvider.getAuthentication(jwt);
            SecurityContextHolder.getContext().setAuthentication(authentication);
        }
        filterChain.doFilter(servletRequest, servletResponse);
    }
 
    private String resolveToken(HttpServletRequest request) {
        String bearerToken = request.getHeader(AUTHORIZATION_HEADER);
        if (StringUtils.hasText(bearerToken) && bearerToken.startsWith("Bearer ")) {
            return bearerToken.substring(7);
        }
        String jwt = request.getParameter(AUTHORIZATION_TOKEN);
        if (StringUtils.hasText(jwt)) {
            return jwt;
        }
        return null;
    }
}