Enum StorageBackend 

#[non_exhaustive]
pub enum StorageBackend {
    Local(LocalBackend),
}

Enum-based storage backend dispatch to local filesystem, S3, GCS, or Azure.

Provides unified async methods for file upload, download, deletion, existence checks, and presigned URL generation across all supported providers.

Errors

All methods return FraiseQLError::File on failure.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Local(LocalBackend)

Local filesystem storage.

Implementations

impl StorageBackend

pub async fn upload( &self, key: &str, data: &[u8], content_type: &str, ) -> Result<String>

Uploads data and returns the storage key.

Errors

Returns FraiseQLError::File if the upload fails.

pub async fn download(&self, key: &str) -> Result<Vec<u8>>

Downloads the contents of the given key.

Errors

Returns FraiseQLError::File with code not_found if the key does not exist, or other error codes on backend failures.

pub async fn delete(&self, key: &str) -> Result<()>

Deletes the object at the given key.

Errors

Returns FraiseQLError::File on backend failures.

pub async fn exists(&self, key: &str) -> Result<bool>

Checks whether an object exists at the given key.

Errors

Returns FraiseQLError::File on backend communication errors.

pub async fn presigned_url(&self, key: &str, expiry: Duration) -> Result<String>

Generates a presigned (time-limited) URL for direct access to an object.

Errors

Returns FraiseQLError::File if presigned URLs are not supported by the backend or if generation fails.

pub async fn list( &self, prefix: &str, cursor: Option<&str>, limit: usize, ) -> Result<ListResult>

Lists objects in the bucket by prefix with pagination.

Errors

Returns FraiseQLError::File on I/O or backend failures.