When trying to invoke rest API throws httpmediatypenotsupportedexception content type 'application/x-www-form-urlencoded' not supported - spring-boot

Question

I am trying to invoke rest API below which consumes a multi-part file. First paramter is a MultipartFile and second is s String. and this functions processes some business logic
#PostMapping( value="/uploadFile", consumes = MediaType.MULTIPART_FORM_DATE_VALUE)
public ResponseEntity<String> upload(#RequestPart("file") MultipartFile file,
#RequestParam("path") String path){
//businness logic
}
Invoking above API from code below. But it throws
httpmediatypenotsupportedexception content type
'application/x-www-form-urlencoded' not supported. I have also tried
added header "Content-type", MediaType.MULTIPART_FORM_DATA_VALUE OR
"Content-Type", "multipart/form-data" OR "Accept",
"multipart/form-data" in the headers below, but that has not helped
either
public void uploadFile() {
Path path = Paths.get("C:/ABC.txt");
byte[] content = null;
try{
content = Files.readAllBytes(path); // All file is read in content variable
} catch(final IOException e){
}
MultipartFile file = new MockMultipartFile("ABC.txt",content);
UriComponentsBuilder urlBuilder = UriComponentsBuilder.fromHttpUrl(oauthURL);
urlBuilder.queryParam("file", file);
urlBuilder.queryParam("path", "/temp);
HttpHeaders headers = new HttpHeaders();
HttpEntity<String> response = null;
HttpEntity<?> entity = new HttpEntity<>(headers);
try{
response = restTemplate.exchange(urlBuilder.build().encode().toUri(), HttpMethod.POST, entity. String.class);
}
catch (Exception e){
}
}
}

Answer 1

Your server accepts (consumes) "multipart/form-data" however you are sending the file and path in the URL. This will always result in a "application/x-www-form-urlencoded".
So you need to change the server to accept it as you send them or send the file and path as the body (within the entity)
EDIT (some code to show how):
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.MULTIPART_FORM_DATA);
MultiValueMap<String, Object> body = new LinkedMultiValueMap<>();
body.add("file", file);
body.add("path","/temp");
HttpEntity<MultiValueMap<String, Object>> requestEntity = new HttpEntity<>(body, headers);
response = restTemplate.postForEntity(serverUrl, requestEntity, String.class);