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use url::Url;
use crate::{proto::blob_service_client::BlobServiceClient, Error};
use super::{BlobService, GRPCBlobService, MemoryBlobService, ObjectStoreBlobService};
/// Constructs a new instance of a [BlobService] from an URI.
///
/// The following schemes are supported by the following services:
/// - `memory://` ([MemoryBlobService])
/// - `grpc+*://` ([GRPCBlobService])
/// - `objectstore+*://` ([ObjectStoreBlobService])
///
/// See their `from_url` methods for more details about their syntax.
pub async fn from_addr(uri: &str) -> Result<Box<dyn BlobService>, crate::Error> {
let url = Url::parse(uri)
.map_err(|e| crate::Error::StorageError(format!("unable to parse url: {}", e)))?;
let blob_service: Box<dyn BlobService> = match url.scheme() {
"memory" => {
// memory doesn't support host or path in the URL.
if url.has_host() || !url.path().is_empty() {
return Err(Error::StorageError("invalid url".to_string()));
}
Box::<MemoryBlobService>::default()
}
scheme if scheme.starts_with("grpc+") => {
// schemes starting with grpc+ go to the GRPCPathInfoService.
// That's normally grpc+unix for unix sockets, and grpc+http(s) for the HTTP counterparts.
// - In the case of unix sockets, there must be a path, but may not be a host.
// - In the case of non-unix sockets, there must be a host, but no path.
// Constructing the channel is handled by tvix_castore::channel::from_url.
let client = BlobServiceClient::new(crate::tonic::channel_from_url(&url).await?);
Box::new(GRPCBlobService::from_client(client))
}
scheme if scheme.starts_with("objectstore+") => {
// We need to convert the URL to string, strip the prefix there, and then
// parse it back as url, as Url::set_scheme() rejects some of the transitions we want to do.
let trimmed_url = {
let s = url.to_string();
Url::parse(s.strip_prefix("objectstore+").unwrap()).unwrap()
};
Box::new(
ObjectStoreBlobService::parse_url(&trimmed_url)
.map_err(|e| Error::StorageError(e.to_string()))?,
)
}
scheme => {
return Err(crate::Error::StorageError(format!(
"unknown scheme: {}",
scheme
)))
}
};
Ok(blob_service)
}
#[cfg(test)]
mod tests {
use super::from_addr;
use rstest::rstest;
#[rstest]
/// This uses an unsupported scheme.
#[case::unsupported_scheme("http://foo.example/test", false)]
/// This correctly sets the scheme, and doesn't set a path.
#[case::memory_valid("memory://", true)]
/// This sets a memory url host to `foo`
#[case::memory_invalid_host("memory://foo", false)]
/// This sets a memory url path to "/", which is invalid.
#[case::memory_invalid_root_path("memory:///", false)]
/// This sets a memory url path to "/foo", which is invalid.
#[case::memory_invalid_root_path_foo("memory:///foo", false)]
/// Correct scheme to connect to a unix socket.
#[case::grpc_valid_unix_socket("grpc+unix:///path/to/somewhere", true)]
/// Correct scheme for unix socket, but setting a host too, which is invalid.
#[case::grpc_invalid_unix_socket_and_host("grpc+unix://host.example/path/to/somewhere", false)]
/// Correct scheme to connect to localhost, with port 12345
#[case::grpc_valid_ipv6_localhost_port_12345("grpc+http://[::1]:12345", true)]
/// Correct scheme to connect to localhost over http, without specifying a port.
#[case::grpc_valid_http_host_without_port("grpc+http://localhost", true)]
/// Correct scheme to connect to localhost over http, without specifying a port.
#[case::grpc_valid_https_host_without_port("grpc+https://localhost", true)]
/// Correct scheme to connect to localhost over http, but with additional path, which is invalid.
#[case::grpc_invalid_has_path("grpc+http://localhost/some-path", false)]
/// An example for object store (InMemory)
#[case::objectstore_valid_memory("objectstore+memory:///", true)]
/// An example for object store (LocalFileSystem)
#[case::objectstore_valid_file("objectstore+file:///foo/bar", true)]
// An example for object store (HTTP / WebDAV)
#[case::objectstore_valid_http_url("objectstore+https://localhost:8080/some-path", true)]
/// An example for object store (S3)
#[cfg_attr(
feature = "cloud",
case::objectstore_valid_s3_url("objectstore+s3://bucket/path", true)
)]
/// An example for object store (GCS)
#[cfg_attr(
feature = "cloud",
case::objectstore_valid_gcs_url("objectstore+gs://bucket/path", true)
)]
#[tokio::test]
async fn test_from_addr_tokio(#[case] uri_str: &str, #[case] exp_succeed: bool) {
if exp_succeed {
from_addr(uri_str).await.expect("should succeed");
} else {
assert!(from_addr(uri_str).await.is_err(), "should fail");
}
}
}
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