I am sending multipart file data as byte array using ByteArrayResource with custom header for every form field. The source class used to wrap file data
public class VehicleInspectionPhotoUploadResource extends ByteArrayResource {
private final String fileName;
public VehicleInspectionPhotoUploadResource(byte[] byteArray,String fileName) {
super(byteArray);
this.fileName=fileName;
}
@Override
public String getFilename() {
return this.fileName;
}
}
The code to form request of multitype/form-data with every part of form having headers
public MultiValueMap<String, Object> getVehicleInspectPhotoRequestMap(MultiValueMap<String, Part> fileParts) {
return fileParts.entrySet().stream()
.map(entry -> {
try {
VehicleInspectionPhoto vehicleInspectionPhoto = createVehicleInspectionPhoto(entry);
HttpHeaders httpHeaders=new HttpHeaders();
httpHeaders.set("Doctype","INSPECTION");
httpHeaders.setContentType(MediaType.valueOf(entry.getValue().get(0).getContentType()));
httpHeaders.setContentDisposition(ContentDisposition.formData().filename(vehicleInspectionPhoto.getFilename()).build());
VehicleInspectionPhotoUploadResource vehicleInspectionPhotoUploadResource=
new VehicleInspectionPhotoUploadResource(vehicleInspectionPhoto.getBytes(), vehicleInspectionPhoto.getFilename());
HttpEntity<VehicleInspectionPhotoUploadResource> httpEntity=new HttpEntity<>(vehicleInspectionPhotoUploadResource,httpHeaders);
return Map.entry(entry.getKey(), httpEntity);
} catch (IOException e) {
throw new RuntimeException(e);
}
}).collect(Collectors.toMap(entry -> entry.getKey(), entry -> List.of(entry.getValue()), (k1, k2) -> {
throw new RuntimeException("merging error");
}, LinkedMultiValueMap::new));
}
The rest template code where the above created param is passed
public void handlerAsync1(MultiValueMap<String,Object> multiValueMap) {
HttpEntity<MultiValueMap<String,Object>> requestEntity = new HttpEntity<>(multiValueMap);
try {
ResponseEntity<String> responseEntity = restTemplate.exchange("http://localhost:8080/receiveMap", HttpMethod.POST, requestEntity, String.class);
log.info(responseEntity.getBody());
log.info(responseEntity.getStatusCode().toString());
} catch (RestClientResponseException restClientResponseException) {
log.error( "Error::{}",restClientResponseException);
throw restClientResponseException;
}
}
Below is the piece of code to read the data,
@PostMapping(value = "/receiveMap")
public ResponseEntity<String> receiveInspectionPhotosForm(@RequestParam MultiValueMap<String, Object> multiValueMap,
@RequestHeader HttpHeaders httpHeaders) {
if (!multiValueMap.containsKey("abc")) {
return ResponseEntity.badRequest().build();
}
return ResponseEntity.ok("received");
}
The issue i am facing is that i am getting empty map above. Even when parameter is of type MultiValueMap<String,Part> the map is empty.Can someone please help me on this?
