question: HttpExchange support file upload download or not

[jianchengwang]

Affects: spring6

hello guys, spring6 support HttpExchange to replace feign, i try it and find it doesn't work to upload or download file

here is upload example

@PostExchange("upload")
    Response<Void> upload(@PathVariable("module") String module,
                                       @RequestPart("files") MultipartFile[] files);

the error

WebClientResponseException$UnsupportedMediaType: 415 Unsupported Media Type from POST

by HttpExchange the content-type changed from multipart/form-data to application/vnd.spring-boot.actuator.v3+json

---

here is download example

    @GetExchange("downloadByDbId/{dbId}")
    void downloadByDbId(HttpServletResponse response, @PathVariable("dbId") Long dbId);

the error

No suitable resolver

so my question is HttpExchange support file upload download or not, if it can give me some example, i cant find it from spring.io

[simonbasle]

That application/vnd.spring-boot.actuator.v3+json makes me think you're trying to define a custom Actuator in Spring Boot or you've mistakenly put your endpoint under the actuators path ? This media type is automatically selected by Spring Boot when dealing with an Actuator endpoint, see https://docs.spring.io/spring-boot/docs/current/reference/htmlsingle/#actuator.endpoints.implementing-custom.web.consumes-predicates.

If you have any further questions, please follow up on Stack Overflow. As mentioned in the guidelines for contributing, we prefer to use GitHub issues only for bugs and enhancements.
(marking as for: stackoverflow&status: invalid as a result)

[duorouCat]

return responseEntity<byte[]> to transfer filedata 用responseEntity<byte[]>来传输文件数据

byte[] bytes = new byte[1024];

byte[] file = new byte[0];

FileInputStream inputStream = IoUtil.toStream(new File(FilePathUtil.fileNameFilter(fileName)));

while (true) {
  int size = inputStream.read(bytes);
  if (size < 0) {
    break;
  }
  byte[] temp = new byte[file.length + size];
  System.arraycopy(file, 0, temp, 0, file.length);
  System.arraycopy(bytes, 0, temp, 0, file.length);
  file = temp;
}

ResponseEntity<byte[]> responseEntity = ResponseEntity.ok(file);

receive

ResponseEntity<byte[]> responseEntity = remotefileservce(...);

ByteArrayInputStream byteArrayInputStream = IoUtil.toStream(responseEntity.getBody());

but there is a problem: "Exceeded limit on max bytes to buffer : 262144", i'm working on that
可能会报错文件"Exceeded limit on max bytes to buffer : 262144" 传输大小有限制, 还在找解决方法

[kozla13]

How do you create a MultipartFile from a byte[]