Disclaimer
I asked the original question on SO, but decided to duplicate it here.

I am using aws-sdk to work with corporate S3 compatible storage. My S3 client configuration looks like this (aws sdk 2.31.12):

@Bean
public S3Client s3Client() {
 return S3Client.builder()
 .endpointOverride(URI.create(properties.getS3().getEndpoint()))
 .region(Region.of(properties.getS3().getRegion()))
 .credentialsProvider(StaticCredentialsProvider.create(
 AwsBasicCredentials.create(
 properties.getS3().getAccessKey(),
 properties.getS3().getSecretKey()
 )
 ))
 .serviceConfiguration(builder ->
 builder.chunkedEncodingEnabled(properties.getS3().getChunkedEncodingEnabled()))
 .forcePathStyle(properties.getS3().getPathStyle())
 .build();
}

the chunked upload setting is intentional, because my storage provider does not fully support it (i.e. I have it disabled).

I am trying to upload a file to S3 by receiving it from the user in the API as a multipart request (the file is passed to the application API as a multipart request). But when uploading, I get an error like:
The request content has fewer bytes than the specified content-length: N bytes.
I tried wrapping the original InputStream in BufferedInputStream as suggested here (even though the javadoc of RequestBody.fromInputStream says that automatic wrapping occurs if the original stream does not support mark/reset, then I get an error when trying to create BufferedInputStream:
Caused by: java.io.IOException: Resetting to invalid mark

My upload code looks like this:

 try (InputStream is = resource.getInputStream()){
 PutObjectResponse putObjectResponse = s3Client.putObject(PutObjectRequest.builder()
 .bucket(properties.getS3().getBucketName())
 .key(resource.getFilename())
 .build(), RequestBody.fromInputStream(is, resource.contentLength()));
 return S3SavedFile.builder()
 .key(resource.getFilename())
 .size(putObjectResponse.size())
 .build();
 } catch (Exception e) {
 throw e;
 }

where resource is MultipartFileResource and resource.getInputStream() returns ChannelInputStream.

Please tell me if it is possible to somehow upload a file to S3 using InputStream from the original multipart request?