package server import ( "net/http" "path" storev1pb "code.tvl.fyi/tvix/store/protos" "github.com/go-chi/chi/v5" "github.com/nix-community/go-nix/pkg/narinfo" "github.com/nix-community/go-nix/pkg/nixbase32" "github.com/nix-community/go-nix/pkg/nixpath" "github.com/sirupsen/logrus" log "github.com/sirupsen/logrus" ) func registerNarinfoPut(s *Server) { s.handler.Put("/{outputhash:^["+nixbase32.Alphabet+"]{32}}.narinfo", func(w http.ResponseWriter, r *http.Request) { defer r.Body.Close() ctx := r.Context() log := log.WithField("outputhash", chi.URLParamFromCtx(ctx, "outputhash")) // TODO: decide on merging behaviour. // Maybe it's fine to add if contents are the same, but more sigs can be added? // Right now, just replace a .narinfo for a path that already exists. // read and parse the .narinfo file narInfo, err := narinfo.Parse(r.Body) if err != nil { log.WithError(err).Error("unable to parse narinfo") w.WriteHeader(http.StatusBadRequest) _, err := w.Write([]byte("unable to parse narinfo")) if err != nil { log.WithError(err).Errorf("unable to write error message to client") } return } log = log.WithFields(logrus.Fields{ "narhash": narInfo.NarHash.SRIString(), "output_path": narInfo.StorePath, }) var pathInfo *storev1pb.PathInfo // look up the narHash in our temporary map s.narHashToPathInfoMu.Lock() pathInfo, found := s.narHashToPathInfo[narInfo.NarHash.SRIString()] s.narHashToPathInfoMu.Unlock() if !found { log.Error("unable to find referred NAR") w.WriteHeader(http.StatusBadRequest) _, err := w.Write([]byte("unable to find referred NAR")) if err != nil { log.WithError(err).Errorf("unable to write error message to client") } return } // compare fields with what we computed while receiving the NAR file // NarSize needs to match if pathInfo.Narinfo.NarSize != narInfo.NarSize { log.Error("narsize mismatch") w.WriteHeader(http.StatusBadRequest) _, err := w.Write([]byte("unable to parse narinfo")) if err != nil { log.WithError(err).Errorf("unable to write error message to client") } return } // We know the narhash in the .narinfo matches one of the two narhashes in the partial pathInfo, // because that's how we found it. // FUTUREWORK: We can't compare References yet, but it'd be a good idea to // do reference checking on .nar files server-side during upload. // We however still need to be parse them, because we store // the bytes in pathInfo.References, and the full strings in pathInfo.Narinfo.ReferenceNames. referencesBytes := make([][]byte, 0) for _, reference := range narInfo.References { np, err := nixpath.FromString(path.Join(nixpath.StoreDir, reference)) if err != nil { log.WithField("reference", reference).WithError(err).Error("unable to parse reference") w.WriteHeader(http.StatusBadRequest) _, err := w.Write([]byte("unable to parse reference")) if err != nil { log.WithError(err).Errorf("unable to write error message to client") } return } referencesBytes = append(referencesBytes, np.Digest) } // assemble the []*storev1pb.NARInfo_Signature{} from narinfo.Signatures. pbNarinfoSignatures := make([]*storev1pb.NARInfo_Signature, 0) for _, narinfoSig := range narInfo.Signatures { pbNarinfoSignatures = append(pbNarinfoSignatures, &storev1pb.NARInfo_Signature{ Name: narinfoSig.Name, Data: narinfoSig.Data, }) } // If everything matches, We will add References, NAR signatures and the // output path name, and then upload to the pathinfo service. // We want a copy here, because we don't want to mutate the contents in the lookup table // until we get things back from the remote store. pathInfoToUpload := &storev1pb.PathInfo{ Node: nil, // set below References: referencesBytes, Narinfo: &storev1pb.NARInfo{ NarSize: pathInfo.Narinfo.NarSize, NarSha256: pathInfo.Narinfo.NarSha256, Signatures: pbNarinfoSignatures, ReferenceNames: narInfo.References, }, } // We need to add the basename of the storepath from the .narinfo // to the pathInfo to be sent. switch v := (pathInfo.GetNode().GetNode()).(type) { case *storev1pb.Node_File: pathInfoToUpload.Node = &storev1pb.Node{ Node: &storev1pb.Node_File{ File: &storev1pb.FileNode{ Name: []byte(path.Base(narInfo.StorePath)), Digest: v.File.Digest, Size: v.File.Size, Executable: v.File.Executable, }, }, } case *storev1pb.Node_Symlink: pathInfoToUpload.Node = &storev1pb.Node{ Node: &storev1pb.Node_Symlink{ Symlink: &storev1pb.SymlinkNode{ Name: []byte(path.Base(narInfo.StorePath)), Target: v.Symlink.Target, }, }, } case *storev1pb.Node_Directory: pathInfoToUpload.Node = &storev1pb.Node{ Node: &storev1pb.Node_Directory{ Directory: &storev1pb.DirectoryNode{ Name: []byte(path.Base(narInfo.StorePath)), Digest: v.Directory.Digest, Size: v.Directory.Size, }, }, } } receivedPathInfo, err := s.pathInfoServiceClient.Put(ctx, pathInfoToUpload) if err != nil { log.WithError(err).Error("unable to upload pathinfo to service") w.WriteHeader(http.StatusInternalServerError) _, err := w.Write([]byte("unable to upload pathinfo to server")) if err != nil { log.WithError(err).Errorf("unable to write error message to client") } return } log.Debugf("received new pathInfo: %v+", receivedPathInfo) // TODO: update the local temporary pathinfo with this? }) }