微服务-网关-全局过滤器鉴权(未使用spring security)

　　请求访问微服务通过网关的进行鉴权的类

　　jwt : https://www.cnblogs.com/Jomini/p/14163713.html

import com.jm.util.JwtUtil;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.http.HttpCookie;
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.util.StringUtils;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

@Component
public class AuthorizeFilter  implements GlobalFilter, Ordered {

    //令牌头名字
    private static final String AUTHORIZE_TOKEN = "Authorization";

    /**
     * 全局拦截
     * @param exchange
     * @param chain
     * @return
     */
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        ServerHttpRequest request = exchange.getRequest();
        ServerHttpResponse response = exchange.getResponse();

        //获取用户令牌信息，如果没有令牌，则拦截
        // 1、参数获取令牌
        String token = request.getHeaders().getFirst(AUTHORIZE_TOKEN);

        //boolean true : 令牌在头文件中 false：令牌不在头文件中
        boolean hasToken = true;

        // 2、头文件中获取
        if(StringUtils.isEmpty(token)){
            token = request.getQueryParams().getFirst(AUTHORIZE_TOKEN);
            hasToken = false;
        }
        // 3、Cookie中
        if(StringUtils.isEmpty(token)){
            HttpCookie httpCookie = request.getCookies().getFirst(AUTHORIZE_TOKEN);
            if(httpCookie != null){
                token = httpCookie.getValue();
            }
        }

        //如果没有令牌，返回无效响应
        if(StringUtils.isEmpty(token)){
            //设置没有权限的状态码 401
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
            // 响应空数据
            return response.setComplete();
        }

        //如果有令牌, 则校验令牌是否有效
        try {
            JwtUtil.parseJWT(token);
        } catch (Exception e) {
            //无效拦截
            //设置没有权限的状态码 401
            response.setStatusCode(HttpStatus.UNAUTHORIZED);
            // 响应空数据
            return response.setComplete();
        }

        //将令牌封装到头文件中
        request.mutate().header(AUTHORIZE_TOKEN, token);

        //有效则放行
        return chain.filter(exchange);
    }

    @Override
    public int getOrder() {
        return 0;
    }
}

　　用户登录代码

@RequestMapping(value = "/login")
    public Result login(String username,String password, HttpServletResponse response, HttpServletRequest request){
        //查询用户信息
        User user = userService.findById(username);

        if(BCrypt.checkpw(password, user.getPassword())){
            //创建用户令牌信息
            Map<String,Object> tokenMap = new HashMap<String,Object>();
            tokenMap.put("role","USER");
            tokenMap.put("success","SUCCESS");
            tokenMap.put("username",username);

            //设置令牌信息
            String token = JwtUtil.createJWT(UUID.randomUUID().toString(), JSON.toJSONString(tokenMap), null);

            //把令牌存入到Cookie
            Cookie cookie = new Cookie("Authorization", token);
            cookie.setDomain("localhost");
            cookie.setPath("/");
            response.addCookie(cookie);

            //把令牌作为参数给用户
            //密码匹配， 登录成功
            return new Result(true, StatusCode.OK, "登录成功！",token);

        }

        if(user!=null && BCrypt.checkpw(password,user.getPassword())){
            return new Result(true,StatusCode.OK,"登录成功！",user);
        }
        return  new Result(false,StatusCode.LOGINERROR,"账号或者密码错误！");
    }

　　只有先访问用户登录，获取到 jwt 再携带 jwt 直接访问