Disable spring boot multipart upload by controller

Question

I am using spring boot for uploading files. The files sizes are usually about 2GB and we cannot use the default spring boot StandardServletMultipartResolver or

Answer 1

This shows how it can be done :

springboot-large-streaming-file-upload-using-apache-commons-fileupload

Look at the answer of balajeerc

Answer 2

It's actually possible to conditionally disable multipary with a custom MultipartResolver, but you should do it at request level.

With multipart enabled, the files are stored locally on the server, and with multipart off, your controller has to do the parsing manually.

Since I read so much conflicting information on this topic, I decided to go into the details here https://youtu.be/OpJ0jKRBa1g where I illustrate how to have both strategies coexist at the same time.

Answer 3

If you enable resolve-lazily, the result is exactly what I think you're asking for.

spring.servlet.multipart.enabled = true
spring.servlet.multipart.resolve-lazily = true

Now you can write controllers with either form of signature.

Pre-parsing by the built-in multipart resolver...

@PostMapping("/upload1")
public ResponseEntity<Void> postUpload1(
    @RequestParam("metadata") MultipartFile metadata,
    @RequestParam("payload") MultipartFile payload)

Or post-parsing (which you can parse yourself)...

@PostMapping(path = "/upload2", consumes = MediaType.MULTIPART_FORM_DATA_VALUE)
public ResponseEntity<Void> postUpload2(HttpServletRequest rawRequest)