Spring Cloud Gateway是否支持来自上游的大文件响应？

Question

我有一个服务，提供超过100 MB的大文件。

我尝试使用路由和谓词设置Spring Cloud Gateway：https://spring.io/projects/spring-cloud-gateway

也试过ProxyExchange：https://cloud.spring.io/spring-cloud-gateway/multi/multi__building_a_simple_gateway_using_spring_mvc_or_webflux.html

这两种方法都不能用于大文件：

org.springframework.core.io.buffer.DataBufferLimitException: Exceeded limit on max bytes to buffer : 2097152
    at org.springframework.core.io.buffer.LimitedDataBufferList.raiseLimitException(LimitedDataBufferList.java:98) ~[spring-core-5.3.10.jar:5.3.10]
    Suppressed: reactor.core.publisher.FluxOnAssembly$OnAssemblyException: 
Error has been observed at the following site(s):

即使我将限制提高到10MB，这也是不够的。

Spring Cloud Gateway是否支持来自上游的大文件响应？是否可以流式传输这样的响应，而不尝试将其全部加载到内存？

Answer 1

最后，事实证明，只有ProxyExchange无法处理大型响应，而常规网关配置可以处理这些响应：

@RestController
class DownloadController {
    @RequestMapping(value = "/proxy", produces = "application/gzip")
    public Mono<? extends ResponseEntity<?>> proxy(ProxyExchange<byte[]> proxy) {
        // Does not support large files
        return proxy.uri("https://distro.ibiblio.org/tinycorelinux/5.x/x86/release/distribution_files/core.gz")
                .sensitive()
                .forward();
    }
}

@Configuration
class GatewayConfiguration {
    @Bean
    public RouteLocator configure(RouteLocatorBuilder builder) {
        // Supports Large files
        return builder.routes()
                .route(predicateSpec -> predicateSpec.path("/gateway")
                        .filters(gatewayFilterSpec -> gatewayFilterSpec.setPath("/tinycorelinux/5.x/x86/release/distribution_files/core.gz"))
                        .uri("https://distro.ibiblio.org"))
                .build();
    }
}