use crate::nar::RenderError; use crate::pathinfoservice::PathInfoService; use crate::proto; use futures::StreamExt; use std::sync::Arc; use tokio::task; use tokio_stream::wrappers::ReceiverStream; use tonic::{async_trait, Request, Response, Result, Status}; use tracing::{debug, instrument, warn}; pub struct GRPCPathInfoServiceWrapper { path_info_service: Arc, // FUTUREWORK: allow exposing without allowing listing } impl From> for GRPCPathInfoServiceWrapper { fn from(value: Arc) -> Self { Self { path_info_service: value, } } } #[async_trait] impl proto::path_info_service_server::PathInfoService for GRPCPathInfoServiceWrapper { type ListStream = ReceiverStream>; #[instrument(skip(self))] async fn get( &self, request: Request, ) -> Result> { match request.into_inner().by_what { None => Err(Status::unimplemented("by_what needs to be specified")), Some(proto::get_path_info_request::ByWhat::ByOutputHash(output_digest)) => { let digest: [u8; 20] = output_digest .to_vec() .try_into() .map_err(|_e| Status::invalid_argument("invalid output digest length"))?; match self.path_info_service.get(digest).await { Ok(None) => Err(Status::not_found("PathInfo not found")), Ok(Some(path_info)) => Ok(Response::new(path_info)), Err(e) => { warn!("failed to retrieve PathInfo: {}", e); Err(e.into()) } } } } } #[instrument(skip(self))] async fn put(&self, request: Request) -> Result> { let path_info = request.into_inner(); // Store the PathInfo in the client. Clients MUST validate the data // they receive, so we don't validate additionally here. match self.path_info_service.put(path_info).await { Ok(path_info_new) => Ok(Response::new(path_info_new)), Err(e) => { warn!("failed to insert PathInfo: {}", e); Err(e.into()) } } } #[instrument(skip(self))] async fn calculate_nar( &self, request: Request, ) -> Result> { match request.into_inner().node { None => Err(Status::invalid_argument("no root node sent")), Some(root_node) => { let path_info_service = self.path_info_service.clone(); let (nar_size, nar_sha256) = path_info_service .calculate_nar(&root_node) .await .expect("error during nar calculation"); // TODO: handle error Ok(Response::new(proto::CalculateNarResponse { nar_size, nar_sha256: nar_sha256.to_vec().into(), })) } } } #[instrument(skip(self))] async fn list( &self, _request: Request, ) -> Result, Status> { let (tx, rx) = tokio::sync::mpsc::channel(5); let path_info_service = self.path_info_service.clone(); let _task = task::spawn(async move { let mut stream = path_info_service.list(); while let Some(e) = stream.next().await { let res = e.map_err(|e| Status::internal(e.to_string())); if tx.send(res).await.is_err() { debug!("receiver dropped"); break; } } }); let receiver_stream = ReceiverStream::new(rx); Ok(Response::new(receiver_stream)) } } impl From for tonic::Status { fn from(value: RenderError) -> Self { match value { RenderError::BlobNotFound(_, _) => Self::not_found(value.to_string()), RenderError::DirectoryNotFound(_, _) => Self::not_found(value.to_string()), RenderError::NARWriterError(_) => Self::internal(value.to_string()), RenderError::StoreError(_) => Self::internal(value.to_string()), RenderError::UnexpectedBlobMeta(_, _, _, _) => Self::internal(value.to_string()), } } }