spring cloud gateway globalFilter往header裏面加參數

隨着spring cloud版本的更新,現現在Spring cloud gateway已經替代zuul來實現路由轉發,攔截的功能了。java

使用方法,只有實現GlobalFilter便可,由於業務須要,攔截全部通過api gateway的api,並驗證其token是否合法,而後進行返回401或者繼續轉發到其餘的微服務,但須要將token解析並將解析出的user放到header中轉發下去。spring

 

使用方式:api

@Component
public class AuthSignatureFilter implements GlobalFilter, Ordered {
 
    static Logger logger = LoggerFactory.getLogger(AuthSignatureFilter.class);
 
    /**
     * 全局過濾器 核心方法
     * @param exchange
     * @param chain
     * @return
     */
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        logger.info("request = {}",JSONArray.toJSONString( exchange.getRequest()) );
        String token = exchange.getRequest().getQueryParams().getFirst("Authroization");
        if (token == null||token.isEmpty()){ //若是token不合法,直接返回401
            exchange.getResponse().setStatusCode(HttpStatus.UNAUTHORIZED);
            return exchange.getResponse().setComplete();
       }
        //向headers中放文件,記得build
        ServerHttpRequest request = exchange.getRequest().mutate().header("X-User", "guanguan").build();
        //將如今的request 變成 exchange對象 
        return chain.filter(exchange.mutate().request(request).build());
    }


 

    @Override
    public int getOrder() {
        return -200;  //數字越低優先級越高
    }
}
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