spring gateway 实现context-path

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springgateway再加一个context-path 这是有病吧，确实啊，网关确实不需要加这东西啊，可有时候没有办法啊，比如你要把它挂到k8s ingress的一个域名的目录下，那就不得不要了，没有转发不过去，不多说费话直接上干货

@Configuration
@ConditionalOnProperty(name="spring.cloud.gateway.prifix",havingValue = "true",matchIfMissing = false)
public class PrefixConfig {
    @Value("${spring.cloud.gateway.api-prefix:/javaapi}")
    private String prefix;

    @Bean
    @Order(-1)
    public WebFilter apiPrefixFilter() {
        return (exchange, chain) -> {
            ServerHttpRequest request = exchange.getRequest();

            String path = request.getURI().getRawPath();
            if (!path.contains(prefix)) {
                ServerHttpResponse response = exchange.getResponse();
                response.setStatusCode(HttpStatus.BAD_GATEWAY);

                DataBuffer buffer = response
                        .bufferFactory()
                        .wrap(HttpStatus.BAD_GATEWAY.getReasonPhrase().getBytes());
                return response.writeWith(Mono.just(buffer));
            }
            String newPath = path.replaceFirst(prefix, "");
            ServerHttpRequest newRequest = request.mutate().path(newPath).build();

            return chain.filter(exchange.mutate().request(newRequest).build());
        };
    }

}

好了，这就完事了，你的ingress可能给你转发网关了

点点关注后续还有更多的干货