I am trying to download a file from Google Drive. Download of a common file (pdf, jpg) went without any problem. But I can't get it to download Google files. I am getting an empty file without type and with size 0. Do you have any idea of what might cause this?
public InputStream download(String id) throws CloudServiceException {
try {
File file = service.files()
.get(id)
.execute();
String link = file.getExportLinks().get("application/pdf");
HttpResponse resp = service.getRequestFactory()
.buildGetRequest(
new GenericUrl(link))
.execute();
return resp.getContent();
} catch (HttpResponseException e) {
throw CloudServiceExceptionTransformer.transform(e, e.getStatusCode());
} catch(IOException ex) {
throw new InternalException(ex);
}
}
You need to use Export method for downloading google docs or any google files
String fileId = "1ZdR3L3qP4Bkq8noWLJHSr_iBau0DNT4Kli4SxNc2YEo";
OutputStream outputStream = new ByteArrayOutputStream();
driveService.files().export(fileId, "application/pdf")
.executeMediaAndDownloadTo(outputStream);
You can try this:
URL url = new URL("http://www.gaertner-servatius.de/images/sinnfrage/kapitel-2/spacetime.gif");
InputStream inStream = url.openStream();
Files.copy(inStream, Paths.get("foobar.gif"), StandardCopyOption.REPLACE_EXISTING);
inStream.close();
Try this:
com.google.api.services.drive.Drive service;
static InputStream download(String id) {
if (service != null && id != null) try {
com.google.api.services.drive.model.File gFl =
service.files().get(id).setFields("downloadUrl").execute();
if (gFl != null){
return service.getRequestFactory()
.buildGetRequest(new GenericUrl(gFl.getDownloadUrl())).execute().getContent());
}
} catch (Exception e) { e.printStackTrace(); }
return null;
}
Good Luck
So the problem was in fact in building of a response. Google files have a size 0 and google media type was not recognized which resulted in this broken file.
Edit: Here is my working version. I removed the set size so that it downloads those 0 sized files.
ResponseEntity.BodyBuilder builder = ResponseEntity.status(HttpStatus.OK)
.header(HttpHeaders.CONTENT_DISPOSITION, encoding)
.contentType(MediaType.parseMediaType(resource.getMimeType()));
return builder.body(new InputStreamResource(resource.getContent()));
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