这篇文章主要介绍了gateway和jwt网关认证实现过程解析,文中通过示例代码介绍的非常详细，对大家的学习或者工作具有一定的参考学习价值,需要的朋友可以参考下
思路： 全局过滤器对所有的请求拦截（生成token有效期30分钟，放入redis设置有效期3天。3天之类可以通过刷新接口自动刷新，超过3天需要重新登录。）
前端在调用接口之前先判断token是否过期（3o分钟），过期则先调刷新接口，换取新token,
1引入相关jar
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-gateway</artifactId>
</dependency>
<dependency>
<groupId>io.jsonwebtoken</groupId>
<artifactId>jjwt</artifactId>
<version>0.9.0</version>
</dependency>
2编写Jwt工具类（生成token + 解析token）
package spring.cloud.gateway.common;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import io.jsonwebtoken.ExpiredJwtException;
import org.springframework.util.StringUtils;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.SignatureAlgorithm;
public class JwtUtil {
public static final String SECRET = "qazwsx123444$#%#()*&& asdaswwi1235 ?;!@#kmmmpom in***xx**&";
public static final String TOKEN_PREFIX = "Bearer";
public static final String LOGIN_URL = "/token/userId/pwd";
public static final String LOGOUT_URL = "/token/userId";
public static final String HEADER_AUTH = "authorization";
public static final String HEADER_USERID = "userid";
//token超时时间
public static final int TOKEN_EXPIRATION_MINUTE = 30;
//token的redis超时时间
public static final int TOKEN_REDIS_EXPIRATION_DAY = 7;
public static String generateToken(String userId) {
Calendar calendar = Calendar.getInstance();
calendar.add(Calendar.MINUTE, TOKEN_EXPIRATION_MINUTE); //得到前一天
Date date = calendar.getTime();
DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
df.format(date);
//todo 优化token的生层规则
HashMap<String, Object> map = new HashMap<>();
map.put(HEADER_USERID, userId);
String jwt = Jwts.builder()
.setSubject(HEADER_USERID).setClaims(map)
.setExpiration(date)
.signWith(SignatureAlgorithm.HS512, SECRET)
.compact();
return TOKEN_PREFIX + " " + jwt;
}
public static Map<String, String> validateToken(String token) {
HashMap<String, String> tokenMap = new HashMap<String, String>();
if (StringUtils.isEmpty(token)) {
return tokenMap;
}
try {
Map<String, Object> tokenBody = Jwts.parser()
.setSigningKey(SECRET)
.parseClaimsJws(token.replace(TOKEN_PREFIX, ""))
.getBody();
String userId = String.valueOf(tokenBody.get(HEADER_USERID));
tokenMap.put(HEADER_USERID, userId);
}catch (ExpiredJwtException e){
e.printStackTrace();
}
return tokenMap;
}
/**
* 移到jwtUtil中去
*
* @param token
* @return
*/
public static Map<String, String> validateTokenAndUser(String token, String userIdIn) {
Map<String, String> tokenResultMap = new HashMap<>();
if (StringUtils.isEmpty(token) || StringUtils.isEmpty(userIdIn)) {
return tokenResultMap;
}
tokenResultMap = validateToken(token);
if (StringUtils.isEmpty(token) || StringUtils.isEmpty(userIdIn)) {
return tokenResultMap;
}
//判断传入的userid和token是否匹配
String userIdOri = tokenResultMap.get(HEADER_USERID);
if (!userIdIn.equals(userIdOri)) {
return new HashMap<String,String>();
}
return tokenResultMap;
}
}
3编写过滤器类
package spring.cloud.gateway.filter;
import java.net.URI;
import java.util.Map;
import org.apache.commons.lang.StringUtils;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.cloud.gateway.route.Route;
import org.springframework.cloud.gateway.support.ServerWebExchangeUtils;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.server.PathContainer;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;
import spring.cloud.gateway.common.JwtUtil;
import spring.cloud.gateway.exception.PermissionException;
/**
* 参数参考 https://blog.csdn.net/tianyaleixiaowu/article/details/83375246
* response参考 https://bbs.csdn.net/topics/392412604?list=11074255
*/
@Component
public class AuthFilter implements GlobalFilter {
@Override
public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
ServerHttpRequest request = exchange.getRequest();
HttpHeaders header = request.getHeaders();
HttpMethod method = request.getMethod();
String token = header.getFirst(JwtUtil.HEADER_AUTH);
String userId = header.getFirst(JwtUtil.HEADER_USERID);
PathContainer pathContainer = request.getPath().pathWithinApplication();
String path = pathContainer.value();
//2- 处理登录请求
if (StringUtils.isBlank(token)) {
//是登录接口则放行，否则返回异常
if (path.contains(JwtUtil.LOGIN_URL) && HttpMethod.POST.equals(method)) {
throw new PermissionException("please login");
}
return chain.filter(exchange);
}
//3- 处理刷新token请求
if (path.indexOf("refresh") >= 0) {
//放行去掉刷新接口（在刷新前校验userId和token是否匹配）
return chain.filter(exchange);
}
//4- 处理刷新token请求
if (path.contains(JwtUtil.LOGOUT_URL) && HttpMethod.DELETE.equals(method)) {
//放行去掉登出接口（在刷新前校验userId和token是否匹配）
return chain.filter(exchange);
}
//5- 携带token请求其他业务接口
Map<String, String> validateResultMap = JwtUtil.validateTokenAndUser(token, userId);
if (validateResultMap == null || validateResultMap.isEmpty()) {
throw new PermissionException("token 已经失效");
}
// TODO 将用户信息存放在请求header中传递给下游业务
Route gatewayUrl = exchange.getRequiredAttribute(ServerWebExchangeUtils.GATEWAY_ROUTE_ATTR);
URI uri = gatewayUrl.getUri();
//表示下游请求对应的服务名如 SPRING-CLOUD-SERVICE SPRING-CLOUD-GATEWAY
String serviceName = uri.getHost();
ServerHttpRequest.Builder mutate = request.mutate();
mutate.header("x-user-id", validateResultMap.get("userid"));
mutate.header("x-user-name", validateResultMap.get("user"));
mutate.header("x-user-serviceName", serviceName);
ServerHttpRequest buildReuqest = mutate.build();
//todo 如果响应中需要放数据，也可以放在response的header中
//ServerHttpResponse response = exchange.getResponse();
//response.getHeaders().add("new_token","token_value");
return chain.filter(exchange.mutate().request(buildReuqest).build());
}
}
4编写相关接口API
package spring.cloud.gateway.controller;
import org.springframework.web.bind.annotation.*;
import spring.cloud.gateway.common.JwtUtil;
import java.util.Map;
@RestController
@RequestMapping("/token")
public class TokenController {
/**
* 登录接口
* @param user（userID +pwd）
* @return
*/
@PostMapping("/userId/pwd")
public String getToken(@RequestBody Map<String,String> user) {
//用户名密码需要加密处理
String result = "";
if (user == null || user.isEmpty()) {
return result;
}
String userId = user.get("userId");
String pwd = user.get("pwd");
if (!doLogin(userId,pwd)) {
return result;
}
String token = JwtUtil.generateToken(userId);
// todo 将token放入redis中，设置超时时间为 2 * t
return token;
}
private Boolean doLogin(String userId,String pwd) {
//后续对接user表验证
if ("admin".equals(userId) && "123".equals(pwd)) {
return true;
}
if ("spring".equals(userId) && "123".equals(pwd)) {
return true;
}
if ("gateway".equals(userId) && "123".equals(pwd)) {
return true;
}
return false;
}
/**
* 登出接口
*/
/**
* 刷新token的接口
* 在刷新前校验userId和token是否匹配
*/
}
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。
