網關自定義全局過濾器

通過網關過濾器，實作一些邏輯的處理，比如ip黑白名單攔截、特定位址的攔截、使用者進行攔截等。

package com.changgou.filter;

import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.http.server.RequestPath;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

/**
 * @author ：gzy
 * @date ：Created in 2019/8/15
 * @description ：
 * @version: 1.0
 */
@Component
public class UrlFilter implements GlobalFilter,Ordered {
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        String path = exchange.getRequest().getURI().getPath();
        System.out.println("UrlFilter攔截器已攔截，url:"+path);
        //攔截請求
        //return exchange.getResponse().setComplete();
        //放行請求
        return chain.filter(exchange);
    }
    /**
     * 定義過濾器執行順序
     * 傳回值越小，越靠前執行
     * @return
     */
    @Override
    public int getOrder() {
        return 1;
    }
}