Display PDF using Spring REST and Angularjs - angularjs

Question

I spent a couple of days on this problem and read hundreds posts. But i still can't resolve it.
REST Controller:
#RequestMapping(value = "/goodInStocks/loadlist={id}", method = RequestMethod.GET)
public ResponseEntity<byte[]> loadList(#PathVariable("id") Integer id) {
byte[] bytes = pdfService.loadList(id);
String filename = "report.pdf";
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.valueOf("application/pdf"));
headers.setContentLength(bytes.length);
headers.setContentDispositionFormData("inline", filename);
if (bytes.length == 0) {
return new ResponseEntity<>(HttpStatus.NO_CONTENT);//You many decide to return HttpStatus.NOT_FOUND
}
return new ResponseEntity<>(bytes, headers, HttpStatus.OK);
}
Angular Service:
function getLoadList(id){
var deferred = $q.defer();
$http.get(REST_SERVICE_URI+'loadlist='+id, {responseType : 'arraybuffer'})
.then(
function (response) {
deferred.resolve(response);
},
function(errResponse){
console.error('Error while fetching load list');
deferred.reject(errResponse);
}
);
return deferred.promise;
}
Angular Controller:
function loadList(documentId){
GoodInStockService.getLoadList(documentId)
.then(
function(d){
var file = new Blob([d.data], {type: 'application/pdf'});
var url = window.URL || window.webkitURL;
var fileURL = url.createObjectURL(file);
window.open(fileURL);
},
function(errResponse){
console.error('Error while getting Load list');
}
)
}
Finally, I get new tab in browser with next error "Failed to load PDF document"
I tried to use different headers in rest controllers, create Blob from response, add 'produces="application/pdf' property in rest controller's method(by the way, in this way i got 406 error - why?)Also, i detect that arraybuffer(if i don't set length in header) and byte[] have different length, is it normal?

Answer 1

Try to write directly to response and flush/close.
RequestMapping(value = "/goodInStocks/loadlist={id}", method = RequestMethod.GET)
public void loadList(#PathVariable("id") Integer id, HttpServletResponse response) {
byte[] byteArray= pdfService.loadList(id);
response.setStatus(HttpStatus.SC_OK);
OutputStream os = response.getOutputStream();
os.write(byteArray);
os.flush();
os.close();
}