spring cloud gateway全局过滤器向request header中放数据

浅浅的花香味﹌ 2022-05-20 09:23 143阅读 0赞

exchange.getRequest().getHeaders().set(); 是不能向 headers中放文件的

这时配置一个gateway全局过滤器  filter中 做了向 header放数据

@Component
    public class AuthSignatureFilter implements GlobalFilter, Ordered {
    
        static Logger logger = LoggerFactory.getLogger(AuthSignatureFilter.class);
    
        /**
         * 全局过滤器 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("authToken");
            //向headers中放文件，记得build
            ServerHttpRequest host = exchange.getRequest().mutate().header("a", "888").build();
            //将现在的request 变成 change对象 
            ServerWebExchange build = exchange.mutate().request(host).build();
            return chain.filter(build);
        }
    
        @Override
        public int getOrder() {
            return -200;
        }
    }

这样发送给路由的request中就放了我们自定义的数据了

2019-11-19 更新

此方法在新版本中已经过时 使用新方法新方法

Consumer<HttpHeaders> httpHeaders = httpHeader -> {
                httpHeader.set("aaaa", "bbb");
                httpHeader.set("xxx", "cc");
                httpHeader.set("bbxx", "bbbx");
                httpHeader.set("aaaa", "bbb");
            };
            ServerHttpRequest serverHttpRequest = exchange.getRequest().mutate().headers(httpHeaders).build();
            exchange.mutate().request(serverHttpRequest).build();