Cant download a file from Google Cloud Storage using Java API

Asked Jan 01 '19 at 13:26

Active Jan 01 '19 at 13:37

Viewed 23 times

I am trying to download atext file by usig Google Cloud Storage Java API as follow:

The file is located at "gs://bucket_name/dir/file.json

I am using below codes

bucket_name="name_of_bucket",
Storage storage = StorageOptions.getDefaultInstance().getService();
Blob blob = storage.get(BlobId.of(bucket_name, "dir/file.jason"));
//ReadChannel r = blob.reader();
return blob.toString();

However, whenever I using my code I get below exception:

Exception in thread "main" java.lang.NullPointerException
        at com.mahdi.handlers.GCSHandler.readJsonFile(GCSHandler.java:30)
        at com.mahdi.handlers.GCSHandler.main(GCSHandler.java:37)

I am not sure if I am giving right parameter for Bucket_Name and OBJECT_NAME in below line:

 Blob blob = storage.get(BlobId.of(bucketName, "dir/file.json"));

edited Jan 01 '19 at 13:37

asked Jan 01 '19 at 13:26

Mahdi

Which line is line 30? – Andy Turner Jan 01 '19 at 13:26
2

And did you actually store the files as "j**a**son"? – Andy Turner Jan 01 '19 at 13:28
return blob.toString();..and yes – Mahdi Jan 01 '19 at 13:29
"The file is located at "gs://bucket_name/dir/file.json" but you said that you actually stored it as "dir/file.jason". Which is it? – Andy Turner Jan 01 '19 at 13:32
the file is 'file.json' located in 'dir' folder of 'bucket_name' – Mahdi Jan 01 '19 at 13:34
Now we've got 3 variants on the table: `json`, `jason` and `jaosn`. – Andy Turner Jan 01 '19 at 13:35
all should be json sorry for typos – Mahdi Jan 01 '19 at 13:36

Cant download a file from Google Cloud Storage using Java API

0 Answers0