CODEWITHSUNDEEP
urlgoogle-cloud-platformgoogle-cloud-storage
natario
natario

Reputation: 25194

Get storage path from Google Storage signed url

The recommended way to get a public readable reference to a Google Storage file seems to be to use Signed URLs.

I need to retrieve a storage reference based on the URL, so that when my database record is deleted I can delete its files from Storage as well.

The signed URL for a file stored in path/file.jpeg seems to follow the pattern:

https://storage.googleapis.com/bucket.name/path%2Ffile.jpeg?foobar

So I am currently using a regex to take the text between bucket.name and the ? character, then replacing %2F with /. I would like to know:

Upvotes: 0

Views: 2371

Answers (1)

JC98
JC98

Reputation: 624

The recommended way to get a public readable reference to a Cloud Storage object is just by allowing public access to it, by doing this you will get a URL in the form of storage.googleapis.com/[your-bucket]/[path-to-file]/[file].

-Is this reliable? Signed URLs are meant to be used when requiring access (read, write or delete) just for a limited time, thus using a Signed URL for the current application needs may not be the best approach since you are using regex to get the appropriate URL path but ignoring all the text after “?” which requires certain computational process to be signed.

-Is there any API in official libraries that does this for me? Could not find any. Not sure if you are referring to extracting the path from the signed URL, if that is the case then the answer is no.

-Is there a better approach? Using the public access permission could be another option. If you are using the signed url to also have delete permissions but not really using the limited time functionality then the best approach is to use object public access, create a service account with enough permissions (delete Cloud Storage objects) and use the storage client library to delete the object from the bucket when the DB record is deleted.

Upvotes: 1

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