SpringCloud初體驗:7、gateway 網關服務如何作token驗證

說說背景:假若有一個用戶服在用戶登陸後,生成一個token給到客戶端,用戶每次請求時都須要這個token,因而每次都會在網關 gateway 校驗,校驗經過後網關從token中解析出userId,而後將userId送到各個服務。php

好比如今有一個 java 服務 和 一個 php 服務,從網關訪問的URL 分別是 http://127.0.0.1:8201/java/ 和 http://127.0.0.1:8201/php/,如今暫時只需對 php 這個服務驗證,先看效果圖html

 

spring cloud gateway 的官網文檔地址:http://cloud.spring.io/spring-cloud-gateway/single/spring-cloud-gateway.html#_addrequestheader_gatewayfilter_factoryjava

1、須要自定義 GatewayFilterFactory 繼承  AbstractGatewayFilterFactory 抽象類,代碼以下:react

package cn.taxiong.tx_api_gateway_server.filter;


import org.springframework.cloud.gateway.filter.GatewayFilter;
import org.springframework.cloud.gateway.filter.factory.AbstractGatewayFilterFactory;
import org.springframework.core.io.buffer.DataBuffer;
import org.springframework.http.HttpHeaders;
import org.springframework.http.server.reactive.ServerHttpResponse;
import reactor.core.publisher.Mono;

/**
 * JWT驗證的過濾器
 *
 * @author szliugx@gmail.com
 * @create 2018-09-09 下午10:05
 **/
public class JwtCheckGatewayFilterFactory  extends AbstractGatewayFilterFactory<JwtCheckGatewayFilterFactory.Config> {

    public JwtCheckGatewayFilterFactory() {
        super(Config.class);
    }

    @Override
    public GatewayFilter apply(Config config) {
        return (exchange, chain) -> {
            String jwtToken = exchange.getRequest().getHeaders().getFirst("Authorization");
            //校驗jwtToken的合法性
            if (jwtToken != null) {
                // 合法
                // 將用戶id做爲參數傳遞下去
                return chain.filter(exchange);
            }

            //不合法(響應未登陸的異常)
            ServerHttpResponse response = exchange.getResponse();
            //設置headers
            HttpHeaders httpHeaders = response.getHeaders();
            httpHeaders.add("Content-Type", "application/json; charset=UTF-8");
            httpHeaders.add("Cache-Control", "no-store, no-cache, must-revalidate, max-age=0");
            //設置body
            String warningStr = "未登陸或登陸超時";
            DataBuffer bodyDataBuffer = response.bufferFactory().wrap(warningStr.getBytes());

            return response.writeWith(Mono.just(bodyDataBuffer));
        };
    }

    public static class Config {
        //Put the configuration properties for your filter here
    }
}
View Code

 

2、須要將自定義的 GatewayFilterFactory 注入到Spring 中spring

package cn.taxiong.tx_api_gateway_server.config;

import cn.taxiong.tx_api_gateway_server.filter.JwtCheckGatewayFilterFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

/**
 * 應用配置
 *
 * @author szliugx@gmail.com
 * @create 2018-09-09 下午10:57
 **/
@Configuration
public class AppConfig {
    @Bean
    public JwtCheckGatewayFilterFactory jwtCheckGatewayFilterFactory(){
        return new JwtCheckGatewayFilterFactory();
    }
}

 

3、網關服務的配置文件中配置 自定義過濾器 生效的服務json

 

 這裏只配置了 php 這個服務,java 這個服務不使用這個過濾器規則api

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