Springboot之OncePerRequestFilter用法及说明

@Component
@Slf4j
public class JwtAuthenticationTokenFilter extends OncePerRequestFilter
{
    @Autowired
    private TokenService tokenService;
    @Override
    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain chain)
            throws ServletException, IOException
    {
        log.info("当前访问的地址:{}", request.getRequestURI());
        String url = request.getRequestURI();
        //	校验请求的url是否在忽略鉴权的url中
        if (checkUrl(url)) {
            request = new HttpServletRequestWrapper(request) {
                private Set<String> headerNameSet;
                @Override
                public Enumeration<String> getHeaderNames() {
                    if (headerNameSet == null) {
                        // first time this method is called, cache the wrapped request's header names:
                        headerNameSet = new HashSet<>();
                        Enumeration<String> wrappedHeaderNames = super.getHeaderNames();
                        while (wrappedHeaderNames.hasMoreElements()) {
                            String headerName = wrappedHeaderNames.nextElement();
                            if (!"Authorization".equalsIgnoreCase(headerName)) {
                                headerNameSet.add(headerName);
                            }
                        }
                    }
                    return Collections.enumeration(headerNameSet);
                }
                @Override
                public Enumeration<String> getHeaders(String name) {
                    if ("Authorization".equalsIgnoreCase(name)) {
                        return Collections.<String>emptyEnumeration();
                    }
                    return super.getHeaders(name);
                }
                @Override
                public String getHeader(String name) {
                    if ("Authorization".equalsIgnoreCase(name)) {
                        return null;
                    }
                    return super.getHeader(name);
                }
            };
        }
        LoginUser loginUser = tokenService.getLoginUser(request);
        if (StringUtils.isNotNull(loginUser) && StringUtils.isNull(SecurityUtils.getAuthentication()))
        {
            tokenService.verifyToken(loginUser);
            UsernamePasswordAuthenticationToken authenticationToken = new UsernamePasswordAuthenticationToken(loginUser, null, loginUser.getAuthorities());
            authenticationToken.setDetails(new WebAuthenticationDetailsSource().buildDetails(request));
            SecurityContextHolder.getContext().setAuthentication(authenticationToken);
        }
        chain.doFilter(request, response);
    }

    /**
     * 校验路径是否是要忽略鉴权路径
     * @param url
     */
    private boolean checkUrl(String url){
        for (String method : PatternsConstant.PATTERNS) {
            if (!method.equals("/**") && !method.equals("**")) {
                if (method.endsWith("/**")){
                    method = method.substring(0, method.length() - 3);
                    if (url.startsWith(method)) {
                        return true;
                    }
                }else {
                    if (url.equals(method)) {
                        return true;
                    }
                }
            }else {
                return false;
            }
        }
        return false;
    }
}