How to stop any particular service in laravel 5.2? - angularjs

Question

If I want to upload 3 file into server then I just select 3 files.
then called 3 services like :
1 something/api/uploadFile (uplodaing first file)
2 something/api/uploadFile (uplodaing second file)
3 something/api/uploadFile (uplodaing third file)
Now my question is how can cancel only second service (stop second file to upload into server)?
I am using Angular js for frontend
HTML Code :
<button type="button" ngf-select="uploadFiles($files)" ng-model="files" ngf-model-invalid="invalidFiles" ngf-model-options="modelOptionsObj" ngf-multiple="true" ngf-pattern="pattern" ngf-accept="acceptSelect" ngf-capture="capture" ngf-drag-over-class="dragOverClassObj" ngf-validate="validateObj" ngf-resize="resizeObj" ngf-resize-if="resizeIfFn($file, $width, $height)" ngf-dimensions="dimensionsFn($file, $width, $height)" ngf-duration="durationFn($file, $duration)" ngf-keep="keepDistinct ? 'distinct' : keep" ngf-fix-orientation="orientation" ngf-max-files="maxFiles" ngf-ignore-invalid="ignoreInvalid" ngf-run-all-validations="runAllValidations" ngf-allow-dir="allowDir" class="drop-box ng-dirty ng-valid ng-valid-max-size ng-valid-min-height ng-valid-min-width ng-valid-ratio ng-valid-max-ratio ng-valid-min-ratio ng-valid-max-duration ng-valid-min-duration ng-valid-duration ng-valid-validate-async-fn ng-valid-max-height ng-valid-max-width ng-valid-dimensions btn btn-save" ngf-drop-available="dropAvailable" >Upload File or Drag File</button>
angular controller code:
$scope.fileUpload = true;
$scope.uploadFiles = function (files, singleRelease) {
$scope.getFileFormat(files);
$scope.files = files;
$scope.fileUpload = false;
if ($scope.releaseCheck == false || $scope.releaseCheck == undefined) {
angular.forEach(files, function (uploadFile, index) {
$scope.uploadSingleFile(uploadFile);
});
}
angular.forEach($scope.files, function (file, index) {
$scope.uploadFile(file);
})
};
$scope.uploadFiles = function (files, singleRelease) {
$scope.getFileFormat(files);
$scope.files = files;
$scope.fileUpload = false;
if ($scope.releaseCheck == false || $scope.releaseCheck == undefined) {
angular.forEach(files, function (uploadFile, index) {
$scope.uploadSingleFile(uploadFile);
});
}
angular.forEach($scope.files, function (file, index) {
$scope.uploadFile(file);
})
};
LARAVEL Controller function code
public function uploadDirectFile(Request $request) {
$uni_msg = \CmsMessage::getUniMessage();
$postData = $request->all();
$mediaName = 'file_' . md5(uniqid(rand(), true));
$fileData = [];
$destinationPath = \CmsHelper::createFolderIfNotExists('directFileUploads/');
if (null !== $postData['file'] && $postData['file']->getFilename() != '') {
$uploadeImage = \CmsHelper::handleMedia($postData['file'], $destinationPath, $mediaName);
$fileData['original_name'] = $postData['file']->getClientOriginalName();
$fileData['mediaName'] = $uploadeImage['mediaName'];
$fileData['mediaType'] = $uploadeImage['mediaType'];
$fileData['mediaMime'] = $uploadeImage['mediaMime'];
$fileData['file_path'] = url('/') . '/directFileUploads/';
}
if (sizeof($fileData) > 0) {
return Response::json(['status' => 1, 'data' => $fileData, 'fileHashKey' => $postData['fileHashKey'], 'message' => $uni_msg['success']]);
}
return Response::json(['status' => 0, 'message' => $uni_msg['error']]);
}
Thanks Ahead.