SpringCloud Webflux过滤器增加header传递方式
作者：低头确望水中月亮
这篇文章主要介绍了SpringCloud Webflux过滤器增加header传递方式，具有很好的参考价值，希望对大家有所帮助。如有错误或未考虑完全的地方，望不吝赐教
Webflux过滤器增加header传递
webflux 使用异步非阻塞的方式，传递Header还需要我们自己增加代码传递：
定义过滤器，便携下面的配置可以尝试一下header的传递到后面的服务中。
@Component
public class AuthorizationFilter implements WebFilter {
@Override
public Mono<Void> filter(ServerWebExchange exchange, WebFilterChain chain) {
ServerHttpRequest mutatedRequest = exchange.getRequest().mutate().header(HttpHeaders.AUTHORIZATION, "Bearer " + authHeader).build();
ServerWebExchange mutatedExchange = exchange.mutate().request(mutatedRequest).build();
return chain.filter(mutatedExchange);
}
}
## Kotlin 的方式
@Component
class AuthorizationFilter : WebFilter {
override fun filter(exchange: ServerWebExchange, chain: WebFilterChain): Mono<Void> {
val mutatedRequest = exchange.request.mutate().header(HttpHeaders.AUTHORIZATION, "Bearer $authHeader").build()
val mutatedExchange = exchange.mutate().request(mutatedRequest).build()
return chain.filter(mutatedExchange)
}
}Webflux过滤器使用
下面是简单处理token的例子
@Component
@Order(value = 2)
public class AuthFilter implements WebFilter {
@Override
public Mono<Void> filter(ServerWebExchange exchange, WebFilterChain chain) {
ServerHttpRequest request = exchange.getRequest();
//ServerHttpResponse response = exchange.getResponse();
String token = request.getHeaders().getFirst("token");
if(null == token){
/*http头中没有appKey，修改请求的目标url为/auth/error
request.mutate返回一个请求构建器(builder design pattern)，path方法修改请求的url，build方法返回新的request
*/
ServerHttpRequest authErrorReq = request.mutate().path("/auth/error").build();
//erverWebExchange.mutate类似，构建一个新的ServerWebExchange
ServerWebExchange authErrorExchange = exchange.mutate().request(authErrorReq).build();
return chain.filter(authErrorExchange);
} else{
return chain.filter(exchange);
}
}
}
webFlux将指定的错误信息通过json格式返回给前端
exchange.getResponse().writeWith(Flux.just(exchange.getResponse().bufferFactory().wrap(JsonUtil.toJson(new BaseErrorVO().fail(e.getMessageCode(),e.getSystemMessage())).getBytes())));
总结
以上为个人经验，希望能给大家一个参考，也希望大家多多支持脚本之家。