Java spring file upload using webclient

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Java

WebClient

Hello, need help in solving an issue in code while uploading a file using webclient in Java as i keep getting errors. The code I tried:


The code I tried returns error 'end of file never reached'. I have tried several solutions like converting to byte etc but nothing worked. Is there something missing or need to be removed from this code extract to make it working. Thanks.

What I have tried:

<pre lang="Java">var file = new File(tempDirectory + File.separator + myFile);

   var multipartBodyBuilder = new MultipartBodyBuilder();
   multipartBodyBuilder.part("ticket", ticket, MediaType.TEXT_PLAIN);
   multipartBodyBuilder.part("file", new FileSystemResource(filePath), MediaType.APPLICATION_PDF).filename(fileName);
   
   var mimeMultipartData = multipartBodyBuilder.build();
HttpHeaders headers = new HttpHeaders();
   	headers.setContentType(MediaType.MULTIPART_FORM_DATA);
WebClient webclient = client.getConnectionProvider().createWebClientBuilder(url, true, headers)
   			.build();
   return webclient.post().body(BodyInserters.fromMultipartData(builder.build())).exchangeToMono(response -> {
   		if (response.statusCode().isError()) {
   			return response.createException().flatMap(Mono::error);
   		}
   		return response.bodyToMono(String.class);
   	}).block().trim();

}