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, directory_service: Arc, ) -> Result, Error> { let url = Url::parse(uri).map_err(|e| Error::StorageError(format!("unable to parse url: {}", e)))?; let path_info_service: Box = 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 = 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 tempfile::TempDir; use test_case::test_case; use tvix_castore::utils::{gen_blob_service, gen_directory_service}; 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 resp = from_addr( uri_str, gen_blob_service().into(), gen_directory_service().into(), ) .await; if exp_succeed { resp.expect("should succeed"); } else { assert!(resp.is_err(), "should fail"); } } }