Spring Web Reactive Framework多部分文件问题

Question

我尝试使用Spring的Reactive Framework实现和映像上传，方法如下：

@RestController
@RequestMapping("/images")
public class ImageController {

    @Autowired
    private IImageService imageService;

    @PostMapping(value = "", consumes = MediaType.MULTIPART_FORM_DATA_VALUE, produces = MediaType.APPLICATION_JSON_VALUE)
    Mono<ImageEntity> saveImage(@RequestBody Mono<FilePart> part) throws Exception{
         return part.flatMap(file -> imageService.saveImage(file));
    }
}

但我一直得到一个415,并带有以下错误消息：

Response status 415 with reason "Content type 'multipart/form-data;boundary=--0b227e57d1a5ca41' not supported\

 curl -v -F "file=@jinyang.gif" -H "Content-Type: multipart/form-data" localhost:8080/images

如何使Spring Reactive Web MVC能够处理多部分文件？

Answer 1

经过四处挖掘，我在Spring WebFlux项目中找到了这个测试：

https://github.com/spring-projects/spring-framework/blob/master/spring-webflux/src/test/java/org/springframework/web/reactive/result/method/annotation/multipartintegrationtests.java

因此，我缺少的部分是@requestpart而不是控制器定义中的@requestbody。

最终代码如下所示：

@RestController
@RequestMapping("/images")
public class ImageController {

    @Autowired
    private IImageService imageService;

    @PostMapping(value = "", consumes = MediaType.MULTIPART_FORM_DATA_VALUE, produces = MediaType.APPLICATION_JSON_VALUE)
    Mono<ImageEntity> saveImage(@RequestPart("file") Mono<FilePart> part) throws Exception{
         return part.flatMap(file -> imageService.saveImage(file));
    }
}