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use url::Url;
use crate::{proto::directory_service_client::DirectoryServiceClient, Error};
use super::{DirectoryService, GRPCDirectoryService, MemoryDirectoryService, SledDirectoryService};
/// Constructs a new instance of a [DirectoryService] from an URI.
///
/// The following URIs are supported:
/// - `memory:`
/// Uses a in-memory implementation.
/// - `sled:`
/// Uses a in-memory sled implementation.
/// - `sled:///absolute/path/to/somewhere`
/// Uses sled, using a path on the disk for persistency. Can be only opened
/// from one process at the same time.
/// - `grpc+unix:///absolute/path/to/somewhere`
/// Connects to a local tvix-store gRPC service via Unix socket.
/// - `grpc+http://host:port`, `grpc+https://host:port`
/// Connects to a (remote) tvix-store gRPC service.
pub async fn from_addr(uri: &str) -> Result<Box<dyn DirectoryService>, crate::Error> {
let url = Url::parse(uri)
.map_err(|e| crate::Error::StorageError(format!("unable to parse url: {}", e)))?;
Ok(if 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::<MemoryDirectoryService>::default()
} else if url.scheme() == "sled" {
// sled doesn't support host, and a path can be provided (otherwise
// it'll live in memory only).
if url.has_host() {
return Err(Error::StorageError("no host allowed".to_string()));
}
if url.path() == "/" {
return Err(Error::StorageError(
"cowardly refusing to open / with sled".to_string(),
));
}
// TODO: expose compression and other parameters as URL parameters?
if url.path().is_empty() {
return Ok(Box::new(
SledDirectoryService::new_temporary()
.map_err(|e| Error::StorageError(e.to_string()))?,
));
}
return Ok(Box::new(
SledDirectoryService::new(url.path())
.map_err(|e| Error::StorageError(e.to_string()))?,
));
} else if url.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 = DirectoryServiceClient::new(crate::tonic::channel_from_url(&url).await?);
Box::new(GRPCDirectoryService::from_client(client))
} else {
Err(crate::Error::StorageError(format!(
"unknown scheme: {}",
url.scheme()
)))?
})
}
#[cfg(test)]
mod tests {
use super::from_addr;
use lazy_static::lazy_static;
use tempfile::TempDir;
use test_case::test_case;
lazy_static! {
static ref TMPDIR_SLED_1: TempDir = TempDir::new().unwrap();
static ref TMPDIR_SLED_2: TempDir = TempDir::new().unwrap();
}
/// This uses an unsupported scheme.
#[test_case("http://foo.example/test", false; "unsupported scheme")]
/// This configures sled in temporary mode.
#[test_case("sled://", true; "sled valid temporary")]
/// This configures sled with /, which should fail.
#[test_case("sled:///", false; "sled invalid root")]
/// This configures sled with a host, not path, which should fail.
#[test_case("sled://foo.example", false; "sled invalid host")]
/// This configures sled with a valid path path, which should succeed.
#[test_case(&format!("sled://{}", &TMPDIR_SLED_1.path().to_str().unwrap()), true; "sled valid path")]
/// This configures sled with a host, and a valid path path, which should fail.
#[test_case(&format!("sled://foo.example{}", &TMPDIR_SLED_2.path().to_str().unwrap()), false; "sled invalid host with valid path")]
/// This correctly sets the scheme, and doesn't set a path.
#[test_case("memory://", true; "memory valid")]
/// This sets a memory url host to `foo`
#[test_case("memory://foo", false; "memory invalid host")]
/// This sets a memory url path to "/", which is invalid.
#[test_case("memory:///", false; "memory invalid root path")]
/// This sets a memory url path to "/foo", which is invalid.
#[test_case("memory:///foo", false; "memory invalid root path foo")]
/// Correct scheme to connect to a unix socket.
#[test_case("grpc+unix:///path/to/somewhere", true; "grpc valid unix socket")]
/// Correct scheme for unix socket, but setting a host too, which is invalid.
#[test_case("grpc+unix://host.example/path/to/somewhere", false; "grpc invalid unix socket and host")]
/// Correct scheme to connect to localhost, with port 12345
#[test_case("grpc+http://[::1]:12345", true; "grpc valid IPv6 localhost port 12345")]
/// Correct scheme to connect to localhost over http, without specifying a port.
#[test_case("grpc+http://localhost", true; "grpc valid http host without port")]
/// Correct scheme to connect to localhost over http, without specifying a port.
#[test_case("grpc+https://localhost", true; "grpc valid https host without port")]
/// Correct scheme to connect to localhost over http, but with additional path, which is invalid.
#[test_case("grpc+http://localhost/some-path", false; "grpc valid invalid host and path")]
#[tokio::test]
async fn test_from_addr_tokio(uri_str: &str, 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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