(1). 概述
有这样一个需求:期望在用户请求之前,添加一个唯一requestId,然后,把这个唯一rquestId返回(Response).
(2). 研究下源码(RemoveResponseHeaderGatewayFilterFactory)
public class RemoveResponseHeaderGatewayFilterFactory
extends AbstractGatewayFilterFactory<AbstractGatewayFilterFactory.NameConfig> {
public RemoveResponseHeaderGatewayFilterFactory() {
super(NameConfig.class);
}
@Override
public List<String> shortcutFieldOrder() {
return Arrays.asList(NAME_KEY);
}
@Override
public GatewayFilter apply(NameConfig config) {
// *****************************************************
// 1.自定义:GatewayFilter
// *****************************************************
return new GatewayFilter() {
@Override
public Mono<Void> filter(ServerWebExchange exchange,
GatewayFilterChain chain) {
// *****************************************************
// 2.对返回(Response)协议头进行更改
// *****************************************************
return chain.filter(exchange).then(Mono.fromRunnable(() -> exchange
.getResponse().getHeaders().remove(config.getName())));
}
@Override
public String toString() {
return filterToStringCreator(
RemoveResponseHeaderGatewayFilterFactory.this)
.append("name", config.getName()).toString();
}
};
}
}
(3). 总结
我感觉好像没什么要总结的.
