Gateway网关---Filter过滤器

官网关于过滤器的文档地址https://cloud.spring.io/spring-cloud-gateway/2.2.x/reference/html/#gatewayfilter-factories

过滤请求头包含参数 X-Request-red 并且值是blue的

spring: cloud: gateway: routes: - id: add_request_header_route uri: https://example.org filters: - AddRequestHeader=X-Request-red, blue

自定义过滤器

创建一个类实现GlobalFilter和Ordered接口 可以通过exchange获取请求的Request和Response对象，然后获取其中的内容，进行判断过滤，然后加入到chain中即可

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.stereotype.Component; import org.springframework.web.server.ServerWebExchange; import reactor.core.publisher.Mono; @Component public class MyGatewayFilter implements GlobalFilter, Ordered { @Override public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) { String name = exchange.getRequest().getQueryParams().getFirst("name"); if (name==null){ System.out.println("用户名为null"); exchange.getResponse().setStatusCode(HttpStatus.NOT_ACCEPTABLE); return exchange.getResponse().setComplete(); } chain.filter(exchange); return null; } @Override public int getOrder() { return 0; } }