java - Spring WebFlux : set max file(s) size for uploading files

Question

我正在使用FileParts的flux来上传文件@RequestPart(FILES) Flux<FilePart> files

并尝试限制文件的最大大小。看起来旧方法不起作用:

spring.servlet.multipart.max-file-size=1MB
spring.servlet.multipart.max-request-size=1MB

而且我没有任何方法来获取 FilePart 中的文件大小界面。那么有没有办法限制 webflux 中上传文件的最大大小，而不复制它呢？我知道有像 Content-Length 这样的标题，但它看起来并不安全。

Answer 1

Web on Reactive Stack documentation声明如下:

For file parts written to disk, there is an additional maxDiskUsagePerPart property to limit the amount of disk space per part. There is also a maxParts property to limit the overall number of parts in a multipart request. To configure all 3 in WebFlux, you’ll need to supply a pre-configured instance of MultipartHttpMessageReader to ServerCodecConfigurer.

我能够通过这个配置类应用它:

@Configuration
@EnableWebFlux
public class WebConfig implements WebFluxConfigurer {

    @Override
    public void configureHttpMessageCodecs(ServerCodecConfigurer configurer) {
        SynchronossPartHttpMessageReader partReader = new SynchronossPartHttpMessageReader();
        partReader.setMaxParts(1);
        partReader.setMaxDiskUsagePerPart(10L * 1024L);
        partReader.setEnableLoggingRequestDetails(true);

        MultipartHttpMessageReader multipartReader = new MultipartHttpMessageReader(partReader);
        multipartReader.setEnableLoggingRequestDetails(true);

        configurer.defaultCodecs().multipartReader(multipartReader);
    }

}