Upload file from AngularJS to Spring Boot - angularjs

Question

I'm using AngularJS to make my front end and Java with Spring Boot to make my back end. I'm trying to import/upload a xlsx, xls, or ods file from the Angular to my Java, but whatever I do, the request doesn't send my file!
Java endpoint:
#PostMapping(value = "/upload/{type}")
#ResponseBody
private ResponseEntity<List<Rota>> importFile(#PathVariable("type") String type,
#RequestParam(required = false, value = "file") MultipartFile fileParam,
#RequestBody MultipartFile file) {
System.out.println("File: " + file.getName());
if(type.toUpperCase().equals("XLSX")){
System.out.println("XLSX!");
}else if(type.toUpperCase().equals("XLS")){
System.out.println("XLS!");
}else if(type.toUpperCase().equals("ODS")){
System.out.println("ODS!");
}else{
System.out.println("OPS!");
return new ResponseEntity<>(new ArrayList<>(), HttpStatus.UNSUPPORTED_MEDIA_TYPE);
}
return new ResponseEntity<>(new ArrayList<>(), HttpStatus.OK);
}
My request-id made using an Angular class prepared to only make requests. I'll post here the code that we use normally in the project and the code that actually worked but I can't use it.
DataFactory:
DataFactory.POST = function (url, entity, config = null) {
if (url && entity) {
return $http
.post(url, entity, config)
.then(res => $q.resolve(res.data), error => $q.reject(error));
}
};
The code that actually worked:
var xhr = new XMLHttpRequest;
xhr.open('POST', `${URL.CTM_ODS()}/rotas/upload/${type}`, true);
xhr.send(formData);
When I use Postman, sending the file through the body, the back end receives null, but when I use form-data from Postman, works fine!
Using the DataFactory I got the following stack on my back end:
WARN 16796 --- [p1002886236-126] org.eclipse.jetty.http.HttpParser : badMessage: java.lang.IllegalStateException: too much data after closed for HttpChannelOverHttp#78fd8670{r=2,c=false,a=IDLE,uri=}

Answer 1

Found the answer in this video: https://www.youtube.com/watch?v=vLHgpOG1cW4
My problem was that the AngularJS deserialize the file! So, what I've made was just put a config object saying to not do that:
DataFactory.POST(`${URL.CTM_ODS()}/rotas/upload/${type}`, formData, { transformRequest: angular.indentity, headers: { 'Content-Type': undefined } }).then(response => {
delete vm.importacao.arquivoCsv;
console.log('Response: ', response);
LoadingManager.hide();
});
As you can see, the difference is on the header object, can you see that we pass the content type as undefined and transformRequest: angular.indentity? That worked for me! If anyone has other way to do so, feel free to comment! Thanks and have a nice day!