I'm trying to upload an image to a existing bucket in my Google Cloud Storage. The image file gets uploaded successfully when I go and check,
but the returned download url is null
private String uploadImage(File filePath, String blobName, File uploadCreds) throws FileNotFoundException, IOException{
Storage storage = StorageOptions.newBuilder().setProjectId("myProjectId")
.setCredentials(ServiceAccountCredentials.fromStream(new FileInputStream(uploadCreds)))
.build()
.getService();
String bucketName = "myBucketName";
Bucket bucket = storage.get(bucketName);
BlobId blobId = BlobId.of(bucket.getName(), blobName);
InputStream inputStream = new FileInputStream(filePath);
BlobInfo blobInfo = BlobInfo.newBuilder(blobId).setContentType("image/jpeg").build();
try (WriteChannel writer = storage.writer(blobInfo)) {
byte[] buffer = new byte[1024];
int limit;
try {
while ((limit = inputStream.read(buffer)) >= 0) {
writer.write(ByteBuffer.wrap(buffer, 0, limit));
}
} catch (Exception ex) {
ex.printStackTrace();
}finally {
writer.close();
}
System.out.println("Image URL : " + blobInfo.getMediaLink());
System.out.println("Blob URL : " + blobInfo.getSelfLink());
return blobInfo.getMediaLink();
}
}
filePath is the Image File
blobName is a random Image Name
uploadCreds is my credintials.json file
Why is the blobInfo.getMediaLink()
and blobInfo.getSelfLink()
returning null
?
What am i doing wrong?
Here is my code that works perfectly
@RestController
@RequestMapping("/api")
public class CloudStorageHelper {
Credentials credentials = GoogleCredentials.fromStream(new FileInputStream("C:\\Users\\sachinthah\\Downloads\\MCQ project -1f959c1fc3a4.json"));
Storage storage = StorageOptions.newBuilder().setCredentials(credentials).build().getService();
public CloudStorageHelper() throws IOException {
}
@SuppressWarnings("deprecation")
@RequestMapping(method = RequestMethod.POST, value = "/imageUpload112")
public String uploadFile(@RequestParam("fileseee")MultipartFile fileStream)
throws IOException, ServletException {
BlobstoreService blobstoreService = BlobstoreServiceFactory.getBlobstoreService();
String bucketName = "mcqimages";
checkFileExtension(fileStream.getName());
DateTimeFormatter dtf = DateTimeFormat.forPattern("-YYYY-MM-dd-HHmmssSSS");
DateTime dt = DateTime.now(DateTimeZone.UTC);
String fileName = fileStream.getOriginalFilename();
BlobInfo blobInfo = BlobInfo.newBuilder(bucketName, fileName)
.setAcl(new ArrayList<>(Arrays.asList(Acl.of(User.ofAllUsers(), Role.READER))))
.build(),
fileStream.getInputStream());
System.out.println(blobInfo.getMediaLink());
// sachintha added a comma after the link to identify the link that get generated
return blobInfo.getMediaLink() + ",";
}
private void checkFileExtension(String fileName) throws ServletException {
if (fileName != null && !fileName.isEmpty() && fileName.contains(".")) {
String[] allowedExt = {".jpg", ".jpeg", ".png", ".gif"};
for (String ext : allowedExt) {
if (fileName.endsWith(ext)) {
return;
}
}
throw new ServletException("file must be an image");
}
}
The Answer was quite simple, i just got rid of the manual upload method and used the inbuilt create blob.
private String uploadImage(File filePath, String blobName, File uploadCreds) throws FileNotFoundException, IOException{
Storage storage = StorageOptions.newBuilder().setProjectId("porjectId")
.setCredentials(ServiceAccountCredentials.fromStream(new FileInputStream(uploadCreds)))
.build()
.getService();
String bucketName = "bucketName";
Bucket bucket = storage.get(bucketName);
BlobId blobId = BlobId.of(bucket.getName(), blobName);
InputStream inputStream = new FileInputStream(filePath);
BlobInfo blobInfo = BlobInfo.newBuilder(blobId).setContentType("image/jpeg").build();
Blob blob = storage.create(blobInfo, inputStream);
System.out.println("Image URL : " + blob.getMediaLink());
return blob.getMediaLink();
}
In case you want to store it in a special folder get the blobinfo.name() and append the "/" to it. for eg if temp.jpg need to be stored with date folders. get the date from date object and format it with date formatter and prepend it
blobinfo.name() = date+"/"+blobinfo.name();
will classify all images date wise..
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