use crate::proto::path_info_service_client::PathInfoServiceClient;
use super::{
GRPCPathInfoService, MemoryPathInfoService, NixHTTPPathInfoService, PathInfoService,
SledPathInfoService,
};
use nix_compat::narinfo;
use std::sync::Arc;
use tvix_castore::{blobservice::BlobService, directoryservice::DirectoryService, Error};
use url::Url;
/// Constructs a new instance of a [PathInfoService] 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.
/// - `nix+https://cache.nixos.org?trusted-public-keys=cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY=`
/// Exposes the Nix binary cache as a PathInfoService, ingesting NARs into the
/// {Blob,Directory}Service. You almost certainly want to use this with some cache.
/// The `trusted-public-keys` URL parameter can be provided, which will then
/// enable signature verification.
/// - `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.
///
/// As the [PathInfoService] needs to talk to [BlobService] and [DirectoryService],
/// these also need to be passed in.
pub async fn from_addr(
uri: &str,
blob_service: Arc<dyn BlobService>,
directory_service: Arc<dyn DirectoryService>,
) -> Result<Box<dyn PathInfoService>, Error> {
let url =
Url::parse(uri).map_err(|e| Error::StorageError(format!("unable to parse url: {}", e)))?;
let path_info_service: Box<dyn PathInfoService> = 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::new(MemoryPathInfoService::new(blob_service, directory_service))
}
"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 other parameters as URL parameters?
Box::new(if url.path().is_empty() {
SledPathInfoService::new_temporary(blob_service, directory_service)
.map_err(|e| Error::StorageError(e.to_string()))?
} else {
SledPathInfoService::new(url.path(), blob_service, directory_service)
.map_err(|e| Error::StorageError(e.to_string()))?
})
}
"nix+http" | "nix+https" => {
// Stringify the URL and remove the nix+ prefix.
// We can't use `url.set_scheme(rest)`, as it disallows
// setting something http(s) that previously wasn't.
let new_url = Url::parse(url.to_string().strip_prefix("nix+").unwrap()).unwrap();
let mut nix_http_path_info_service =
NixHTTPPathInfoService::new(new_url, blob_service, directory_service);
let pairs = &url.query_pairs();
for (k, v) in pairs.into_iter() {
if k == "trusted-public-keys" {
let pubkey_strs: Vec<_> = v.split_ascii_whitespace().collect();
let mut pubkeys: Vec<narinfo::PubKey> = Vec::with_capacity(pubkey_strs.len());
for pubkey_str in pubkey_strs {
pubkeys.push(narinfo::PubKey::parse(pubkey_str).map_err(|e| {
Error::StorageError(format!("invalid public key: {e}"))
})?);
}
nix_http_path_info_service.set_public_keys(pubkeys);
}
}
Box::new(nix_http_path_info_service)
}
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 =
PathInfoServiceClient::new(tvix_castore::tonic::channel_from_url(&url).await?);
Box::new(GRPCPathInfoService::from_client(client))
}
_ => Err(Error::StorageError(format!(
"unknown scheme: {}",
url.scheme()
)))?,
};
Ok(path_info_service)
}
#[cfg(test)]
mod tests {
use super::from_addr;
use lazy_static::lazy_static;
use std::sync::Arc;
use tempfile::TempDir;
use test_case::test_case;
use tvix_castore::{
blobservice::{BlobService, MemoryBlobService},
directoryservice::{DirectoryService, MemoryDirectoryService},
};
lazy_static! {
static ref TMPDIR_SLED_1: TempDir = TempDir::new().unwrap();
static ref TMPDIR_SLED_2: TempDir = TempDir::new().unwrap();
}
// the gRPC tests below don't fail, because we connect lazily.
/// This uses a 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 for the cache.nixos.org binary cache.
#[test_case("nix+https://cache.nixos.org", true; "correct nix+https")]
/// Correct Scheme for the cache.nixos.org binary cache (HTTP URL).
#[test_case("nix+http://cache.nixos.org", true; "correct nix+http")]
/// Correct Scheme for Nix HTTP Binary cache, with a subpath.
#[test_case("nix+http://192.0.2.1/foo", true; "correct nix http with subpath")]
/// Correct Scheme for Nix HTTP Binary cache, with a subpath and port.
#[test_case("nix+http://[::1]:8080/foo", true; "correct nix http with subpath and port")]
/// Correct Scheme for the cache.nixos.org binary cache, and correct trusted public key set
#[test_case("nix+https://cache.nixos.org?trusted-public-keys=cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY=", true; "correct nix+https with trusted-public-key")]
/// Correct Scheme for the cache.nixos.org binary cache, and two correct trusted public keys set
#[test_case("nix+https://cache.nixos.org?trusted-public-keys=cache.nixos.org-1:6NCHdD59X431o0gWypbMrAURkbJ16ZPMQFGspcDShjY=%20foo:jp4fCEx9tBEId/L0ZsVJ26k0wC0fu7vJqLjjIGFkup8=", true; "correct nix+https with two trusted-public-key")]
/// 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) {
let blob_service: Arc<dyn BlobService> = Arc::from(MemoryBlobService::default());
let directory_service: Arc<dyn DirectoryService> =
Arc::from(MemoryDirectoryService::default());
let resp = from_addr(uri_str, blob_service, directory_service).await;
if exp_succeed {
resp.expect("should succeed");
} else {
assert!(resp.is_err(), "should fail");
}
}
}
