微服务网关的设置使用 及 全局过滤器实现jwt校验
一. 配置网关
1. 导入依赖
org.springframework.cloud
spring-cloud-starter-gateway
com.alibaba.cloud
spring-cloud-starter-alibaba-nacos-discovery
com.alibaba.cloud
spring-cloud-starter-alibaba-nacos-config
io.jsonwebtoken
jjwt
2. 设置bootstrap.yml
server:
port: 001 #端口号
spring:
application:
name: leadnews-app-gateway #名称
cloud:
nacos:
discovery:
server-addr: localhost:8848
config:
server-addr: localhost:8848
file-extension: yml3. 创建引导类
package com.10jqka.app.gateway;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
@SpringBootApplication
@EnableDiscoveryClient //开启注册中心
public class AppGatewayApplication {
public static void main(String[] args) {
SpringApplication.run(AppGatewayApplication.class,args);
}
}4. 在nacos的配置中心创建yml配置
spring:
cloud:
gateway:
globalcors:
add-to-simple-url-handler-mapping: true
corsConfigurations:
'[/**]':
allowedHeaders: "*"
allowedOrigins: "*"
allowedMethods:
- GET
- POST
- DELETE
- PUT
- OPTION
routes:
# 平台管理
- id: user
uri: lb://leadnews-user
predicates:
- Path=/user/**
filters:
- StripPrefix= 15. 启动项目网关
二. 全局过滤器实现jwt校验
1. 思路分析：
1.1 进入网关开始登陆，网关过滤器进行判断，如果登录，则路由到后台管理微服务进行登录
1.2 登录成功，后台管理微服务签发JWT TOKEN信息返回给用户
1.3 再次进入网关开始访问，网关过滤器接收用户携带的TOKEN
1.4 网关过滤器解析TOKEN ，判断是否有权限，有，则放行，没有，则返回未认证
2. 具体实现：
2.1 在认证过滤器中需要用到jwt的解析，工具类放到网关微服务
package com.10jqka.app.gateway.util;
import io.jsonwebtoken.*;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import java.util.*;
public class AppJwtUtil {
// TOKEN的有效期一天（S）
private static final int TOKEN_TIME_OUT = 3_600;
// 加密KEY
private static final String TOKEN_ENCRY_KEY = "MDk4ZjZiY2Q0NjIxZDM3M2NhZGU0ZTgzMjYyN2I0ZjY";
// 最小刷新间隔(S)
private static final int REFRESH_TIME = 300;
// 生产ID
public static String getToken(Long id){
Map claimMaps = new HashMap<>();
claimMaps.put("id",id);
long currentTime = System.currentTimeMillis();
return Jwts.builder()
.setId(UUID.randomUUID().toString())
.setIssuedAt(new Date(currentTime)) //签发时间
.setSubject("system") //说明
.setIssuer("10jqka") //签发者信息
.setAudience("app") //接收用户
.compressWith(CompressionCodecs.GZIP) //数据压缩方式
.signWith(SignatureAlgorithm.HS512, generalKey()) //加密方式
.setExpiration(new Date(currentTime + TOKEN_TIME_OUT * 1000)) //过期时间戳
.addClaims(claimMaps) //cla信息
.compact();
}
/**
* 获取token中的claims信息
*
* @param token
* @return
*/
private static Jws getJws(String token) {
return Jwts.parser()
.setSigningKey(generalKey())
.parseClaimsJws(token);
}
/**
* 获取payload body信息
*
* @param token
* @return
*/
public static Claims getClaimsBody(String token) {
try {
return getJws(token).getBody();
}catch (ExpiredJwtException e){
return null;
}
}
/**
* 获取hearder body信息
*
* @param token
* @return
*/
public static JwsHeader getHeaderBody(String token) {
return getJws(token).getHeader();
}
/**
* 是否过期
*
* @param claims
* @return -1：有效，0：有效，1：过期，2：过期
*/
public static int verifyToken(Claims claims) {
if(claims==null){
return 1;
}
try {
claims.getExpiration()
.before(new Date());
// 需要自动刷新TOKEN
if((claims.getExpiration().getTime()-System.currentTimeMillis())>REFRESH_TIME*1000){
return -1;
}else {
return 0;
}
} catch (ExpiredJwtException ex) {
return 1;
}catch (Exception e){
return 2;
}
}
/**
* 由字符串生成加密key
*
* @return
*/
public static SecretKey generalKey() {
byte[] encodedKey = Base64.getEncoder().encode(TOKEN_ENCRY_KEY.getBytes());
SecretKey key = new SecretKeySpec(encodedKey, 0, encodedKey.length, "AES");
return key;
}
public static void main(String[] args) {
/* Map map = new HashMap();
map.put("id","11");*/
System.out.println(AppJwtUtil.getToken(1102L));
Jws jws = AppJwtUtil.getJws("eyJhbGciOiJIUzUxMiIsInppcCI6IkdaSVAifQ.H4sIAAAAAAAAADWLQQqEMAwA_5KzhURNt_qb1KZYQSi0wi6Lf9942NsMw3zh6AVW2DYmDGl2WabkZgreCaM6VXzhFBfJMcMARTqsxIG9Z888QLui3e3Tup5Pb81013KKmVzJTGo11nf9n8v4nMUaEY73DzTabjmDAAAA.4SuqQ42IGqCgBai6qd4RaVpVxTlZIWC826QA9kLvt9d-yVUw82gU47HDaSfOzgAcloZedYNNpUcd18Ne8vvjQA");
Claims claims = jws.getBody();
System.out.println(claims.get("id"));
}
}
2.2 在网关微服务中新建全局过滤器
package com.10jqka.app.gateway.filter;
import com.10jqka.app.gateway.util.AppJwtUtil;
import io.jsonwebtoken.Claims;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;
@Component
@Slf4j
public class AuthorizeFilter implements Ordered, GlobalFilter {
@Override
public Mono filter(ServerWebExchange exchange, GatewayFilterChain chain) {
//1.获取request和response对象
ServerHttpRequest request = exchange.getRequest();
ServerHttpResponse response = exchange.getResponse();
//2.判断是否是登录
if(request.getURI().getPath().contains("/login")){
//放行
return chain.filter(exchange);
}
//3.获取token
String token = request.getHeaders().getFirst("token");
//4.判断token是否存在
if(StringUtils.isBlank(token)){
response.setStatusCode(HttpStatus.UNAUTHORIZED);
return response.setComplete();
}
//5.判断token是否有效
try {
Claims claimsBody = AppJwtUtil.getClaimsBody(token);
//是否是过期
int result = AppJwtUtil.verifyToken(claimsBody);
if(result == 1 || result == 2){
response.setStatusCode(HttpStatus.UNAUTHORIZED);
return response.setComplete();
}
}catch (Exception e){
e.printStackTrace();
response.setStatusCode(HttpStatus.UNAUTHORIZED);
return response.setComplete();
}
//6.放行
return chain.filter(exchange);
}
// 优先级设置 值越小 优先级越高
@Override
public int getOrder() {
return 0;
}
}