spring cloud gateway全局filter和自定义filter

1、全局filter

/**
 * @author code
 * @version 1.0
 * @Date 2021/11/11 15:34
 * @Description ${全局filter}
 */
public class TokenFilter implements GlobalFilter, Ordered {
    
    
    Logger logger = LoggerFactory.getLogger(TokenFilter.class);

    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain){
    
    
        String token = exchange.getRequest().getQueryParams().getFirst("token");
        if(token == null || token.isEmpty()){
    
    
            logger.info("token is empty ...");
            exchange.getResponse().setStatusCode(HttpStatus.UNAUTHORIZED);
            return exchange.getResponse().setComplete();
        }
        return chain.filter(exchange);
    }

    @Override
    public int getOrder(){
    
    
        return -100;
    }
}

2、自定义filter

/**
 * @author code
 * @version 1.0
 * @Date 2021/11/11 16:07
 * @Description ${自定义过滤器}
 */
public class RequestTimeFilter implements GatewayFilter, Ordered {
    
    
    Logger logger = LoggerFactory.getLogger(RequestTimeFilter.class);
    private static final String REQUEST_TIME_BEGIN = "requestTimeBegin";

    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain){
    
    

        exchange.getAttributes().put(REQUEST_TIME_BEGIN, System.currentTimeMillis());
        return chain.filter(exchange).then(
                Mono.fromRunnable(() -> {
    
    
                    Long startTime = exchange.getAttribute(REQUEST_TIME_BEGIN);
                    if(startTime != null){
    
    
                        logger.info(exchange.getRequest().getURI().getRawPath() + ":" + (System.currentTimeMillis() - startTime) + "ms");
                    }
                })
        );
    }

    @Override
    public int getOrder(){
    
    
        return 0;
    }
}

3、全局filter配置

/**
	 * 注册filter
	 *
	 * @return
	 */
	@Bean
	public TokenFilter tokenFilter(){
    
    
		return new TokenFilter();
	}

4、自定义filter配置

@Bean
	public RouteLocator routeLocator(RouteLocatorBuilder builder){
    
    
		return builder.routes().
				route(new Function<PredicateSpec, Route.AsyncBuilder>() {
    
    
					@Override
					public Route.AsyncBuilder apply(PredicateSpec predicateSpec) {
    
    
						return predicateSpec
								.path("/test/**")
								.filters(new Function<GatewayFilterSpec, UriSpec>() {
    
    
									@Override
									public UriSpec apply(GatewayFilterSpec gatewayFilterSpec) {
    
    
										return gatewayFilterSpec.stripPrefix(1).filter(new RequestTimeFilter());
									}
								})
								.uri("http://ip:port")
								.id("test-server");
					}
				}).build();
	}