How to upload files to Google Cloud Storage Bucket subdirectory

Question

I want to upload files to google cloud storage bucket subdirectories using Go. The only reference code I found is link.

wc := client.Bucket(bucket).Object(object).NewWriter(ctx)

The object here is a string of your file name but the file path is not allowed. It will throw the following error when I use a file name like /path/filename. It works only if you use filename.

connect: can't assign requested address

Previously I use node.js and it works fine.

await bucket.upload(filePath, { destination: `path/filename`, resumable:false });

How can I achieve that with Go?

Answer 1

Continuing with the Node example, the bucket is always the top-level bucket name.

Subdirectories become part of the "file". GCP thinks of the subdirectory(ies) + the file as an object. Yes, it is counter-intuitive.

const bucketName = 'top-level-bucket-name';
const subBucketName = 'sub_level/another_sub_level/';
// Cloud Function uses /tmp not ./tmp
const directory = './tmp'; 
const fileName = 'foo.txt';

storage.bucket(bucketName).upload(`${directory}/${fileName}`, { destination: subBucketName + fileName});

I ran into an issue with hyphens in subdirectories not working, which is why there are underscores instead.