Gateway全局过滤器

https://gitee.com/zjj19941/ZJJ_Neaten5.10/tree/master/ZJJ_Gateway/demo08

import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

import java.util.Arrays;
import java.util.Collection;
import java.util.List;
import java.util.Optional;


@Component
@Order(-1)
@Slf4j
public class CheckAuthFilter implements GlobalFilter {
    @Override
    public Mono filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        //校验请求头中的token
        List token = exchange.getRequest().getHeaders().get("token");

        log.info("token的值是:" + token);
        if (token.isEmpty()) {
            return chain.filter(exchange);
        }
        // TODO token校验
        return chain.filter(exchange);
    }
}

启动下面两个服务:
MallOrderApplication
MallGatewayApplication
​

然后postman发起请求
​

http://localhost:8888/order/demo01

控制台输出:

此时就打印出来你访问接口的时候header里面的token的值了, 你就可以利用这个token的值去进行校验token是否合法.