如何使用 Spring REST multipart 分块发送大文件(REST 客户端) [英] How to send large file using Spring REST multipart in chunks (REST client)
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问题描述
我正在使用 spring REST 编写一个将文件上传到数据库的客户端.以下是我无法更改的服务器端控制器代码:
I am using spring REST to write a client which will upload a file to DB. Following is the server side controller code which I can not change :
@RequestMapping(method = RequestMethod.POST)
public ResponseEntity<UploadResponseDto> uploadFile(@RequestParam("file") MultipartFile file) throws IOException {
String contentType = file.getContentType();
if ( contentType == null || !contentType.equalsIgnoreCase(APPLICATION_OCTET_STREAM)) {
contentType = APPLICATION_OCTET_STREAM;
}
GridFSFile gridFSFile = gridFsTemplate.store(file.getInputStream(), file.getOriginalFilename(), contentType);
MultiValueMap<String, String> headers = new LinkedMultiValueMap<>();
String fileLocation = linkTo(FileAttachmentController.class).slash(gridFSFile.getId()).toUri().toString();
headers.add(LOCATION, fileLocation);
UploadResponseDto uploadResponseDto = new UploadResponseDto(file.getOriginalFilename(), fileLocation);
return new ResponseEntity<>(uploadResponseDto, headers, HttpStatus.CREATED);
}
我发送文件的客户端代码是:
And my client side code for sending file is :
SimpleClientHttpRequestFactory factory = new SimpleClientHttpRequestFactory();
factory.setBufferRequestBody(false);
RestTemplate restTemplate = new RestTemplate(factory);
HttpHeaders headers = new HttpHeaders();
headers.set(HttpHeaders.AUTHORIZATION, "Bearer " + token);
headers.set("Accept", "application/json");
headers.setContentType(MediaType.MULTIPART_FORM_DATA);
File file = new File(fileToUpload);
MultiValueMap<String, Object> data = new LinkedMultiValueMap<String, Object>();
ByteArrayResource resource = new ByteArrayResource(
Files.readAllBytes(Paths.get(fileToUpload))) {
@Override
public String getFilename() {
return file.getName();
}
};
data.add("file", resource);
HttpEntity<MultiValueMap<String, Object>> requestEntity = new HttpEntity<MultiValueMap<String, Object>>(
data, headers);
ResponseEntity<Map> apiResponse = null;
apiResponse = restTemplate.exchange(
"http://{end_point_url}",
HttpMethod.POST, requestEntity, Map.class);
但是当我使用此代码发送 50 MB 文件时,它会抛出413 请求实体太大错误"
But when I use this code to send lets say 50 MB file, it throws "413 Request entity too large error"
有人可以帮助我了解如何分块发送大文件吗?
Can somebody please help me out on how to send a large file in chunks?
谢谢&问候,维卡斯·吉特
Thanks & Regards, Vikas Gite
推荐答案
您可以使用
org.springframework.web.multipart.commons.CommonsMultipartResolver
@Bean(name = "multipartResolver")
public CommonsMultipartResolver multipartResolver() {
CommonsMultipartResolver multipartResolver = new CommonsMultipartResolver();
multipartResolver.setMaxUploadSize(54525952); //...specify your size of file (20971520 - 20 MB) (54525952 - 52 MB)
return multipartResolver;
}
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