storj/pkg/pointerdb/pointerdb.go
2018-10-12 11:52:32 +03:00

300 lines
8.0 KiB
Go

// Copyright (C) 2018 Storj Labs, Inc.
// See LICENSE for copying information.
package pointerdb
import (
"context"
"encoding/base64"
"github.com/golang/protobuf/proto"
"github.com/golang/protobuf/ptypes"
"github.com/zeebo/errs"
"go.uber.org/zap"
"google.golang.org/grpc"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/metadata"
"google.golang.org/grpc/status"
monkit "gopkg.in/spacemonkeygo/monkit.v2"
"storj.io/storj/pkg/auth"
"storj.io/storj/pkg/overlay"
"storj.io/storj/pkg/pb"
pointerdbAuth "storj.io/storj/pkg/pointerdb/auth"
"storj.io/storj/pkg/provider"
"storj.io/storj/pkg/storage/meta"
"storj.io/storj/storage"
)
var (
mon = monkit.Package()
segmentError = errs.Class("segment error")
)
// Server implements the network state RPC service
type Server struct {
DB storage.KeyValueStore
logger *zap.Logger
config Config
cache *overlay.Cache
identity *provider.FullIdentity
}
// NewServer creates instance of Server
func NewServer(db storage.KeyValueStore, cache *overlay.Cache, logger *zap.Logger, c Config, identity *provider.FullIdentity) *Server {
return &Server{
DB: db,
logger: logger,
config: c,
cache: cache,
identity: identity,
}
}
func (s *Server) validateAuth(ctx context.Context) error {
APIKey, ok := auth.GetAPIKey(ctx)
if !ok || !pointerdbAuth.ValidateAPIKey(string(APIKey)) {
s.logger.Error("unauthorized request: ", zap.Error(status.Errorf(codes.Unauthenticated, "Invalid API credential")))
return status.Errorf(codes.Unauthenticated, "Invalid API credential")
}
return nil
}
func (s *Server) appendSignature(ctx context.Context) error {
signature, err := auth.GenerateSignature(s.identity)
if err != nil {
return err
}
if signature == nil {
return nil
}
base64 := base64.StdEncoding
encodedSignature := base64.EncodeToString(signature)
return grpc.SetHeader(ctx, metadata.Pairs("signature", encodedSignature))
}
func (s *Server) validateSegment(req *pb.PutRequest) error {
min := s.config.MinRemoteSegmentSize
remote := req.GetPointer().Remote
remoteSize := req.GetPointer().GetSize()
if remote != nil && remoteSize < int64(min) {
return segmentError.New("remote segment size %d less than minimum allowed %d", remoteSize, min)
}
max := s.config.MaxInlineSegmentSize
inlineSize := len(req.GetPointer().InlineSegment)
if inlineSize > max {
return segmentError.New("inline segment size %d greater than maximum allowed %d", inlineSize, max)
}
return nil
}
// Put formats and hands off a key/value (path/pointer) to be saved to boltdb
func (s *Server) Put(ctx context.Context, req *pb.PutRequest) (resp *pb.PutResponse, err error) {
defer mon.Task()(&ctx)(&err)
err = s.validateSegment(req)
if err != nil {
return nil, status.Errorf(codes.InvalidArgument, err.Error())
}
if err = s.validateAuth(ctx); err != nil {
return nil, err
}
// Update the pointer with the creation date
req.GetPointer().CreationDate = ptypes.TimestampNow()
pointerBytes, err := proto.Marshal(req.GetPointer())
if err != nil {
s.logger.Error("err marshaling pointer", zap.Error(err))
return nil, status.Errorf(codes.Internal, err.Error())
}
// TODO(kaloyan): make sure that we know we are overwriting the pointer!
// In such case we should delete the pieces of the old segment if it was
// a remote one.
if err = s.DB.Put([]byte(req.GetPath()), pointerBytes); err != nil {
s.logger.Error("err putting pointer", zap.Error(err))
return nil, status.Errorf(codes.Internal, err.Error())
}
return &pb.PutResponse{}, nil
}
// Get formats and hands off a file path to get from boltdb
func (s *Server) Get(ctx context.Context, req *pb.GetRequest) (resp *pb.GetResponse, err error) {
defer mon.Task()(&ctx)(&err)
s.logger.Debug("entering pointerdb get")
if err = s.validateAuth(ctx); err != nil {
return nil, err
}
if err = s.appendSignature(ctx); err != nil {
return nil, err
}
pointerBytes, err := s.DB.Get([]byte(req.GetPath()))
if err != nil {
if storage.ErrKeyNotFound.Has(err) {
return nil, status.Errorf(codes.NotFound, err.Error())
}
s.logger.Error("err getting pointer", zap.Error(err))
return nil, status.Errorf(codes.Internal, err.Error())
}
pointer := &pb.Pointer{}
err = proto.Unmarshal(pointerBytes, pointer)
if err != nil {
s.logger.Error("Error unmarshaling pointer")
return nil, err
}
nodes := []*pb.Node{}
var r = &pb.GetResponse{
Pointer: pointer,
Nodes: nil,
}
if !s.config.Overlay || pointer.Remote == nil {
return r, nil
}
for _, piece := range pointer.Remote.RemotePieces {
node, err := s.cache.Get(ctx, piece.NodeId)
if err != nil {
s.logger.Error("Error getting node from cache")
}
nodes = append(nodes, node)
}
r = &pb.GetResponse{
Pointer: pointer,
Nodes: nodes,
}
return r, nil
}
// List returns all Path keys in the Pointers bucket
func (s *Server) List(ctx context.Context, req *pb.ListRequest) (resp *pb.ListResponse, err error) {
defer mon.Task()(&ctx)(&err)
if err = s.validateAuth(ctx); err != nil {
return nil, err
}
var prefix storage.Key
if req.Prefix != "" {
prefix = storage.Key(req.Prefix)
if prefix[len(prefix)-1] != storage.Delimiter {
prefix = append(prefix, storage.Delimiter)
}
}
rawItems, more, err := storage.ListV2(s.DB, storage.ListOptions{
Prefix: prefix, //storage.Key(req.Prefix),
StartAfter: storage.Key(req.StartAfter),
EndBefore: storage.Key(req.EndBefore),
Recursive: req.Recursive,
Limit: int(req.Limit),
IncludeValue: req.MetaFlags != meta.None,
})
if err != nil {
return nil, status.Errorf(codes.Internal, "ListV2: %v", err)
}
var items []*pb.ListResponse_Item
for _, rawItem := range rawItems {
items = append(items, s.createListItem(rawItem, req.MetaFlags))
}
return &pb.ListResponse{Items: items, More: more}, nil
}
// createListItem creates a new list item with the given path. It also adds
// the metadata according to the given metaFlags.
func (s *Server) createListItem(rawItem storage.ListItem, metaFlags uint32) *pb.ListResponse_Item {
item := &pb.ListResponse_Item{
Path: rawItem.Key.String(),
IsPrefix: rawItem.IsPrefix,
}
if item.IsPrefix {
return item
}
err := s.setMetadata(item, rawItem.Value, metaFlags)
if err != nil {
s.logger.Warn("err retrieving metadata", zap.Error(err))
}
return item
}
// getMetadata adds the metadata to the given item pointer according to the
// given metaFlags
func (s *Server) setMetadata(item *pb.ListResponse_Item, data []byte, metaFlags uint32) (err error) {
if metaFlags == meta.None || len(data) == 0 {
return nil
}
pr := &pb.Pointer{}
err = proto.Unmarshal(data, pr)
if err != nil {
return err
}
// Start with an empty pointer to and add only what's requested in
// metaFlags to safe to transfer payload
item.Pointer = &pb.Pointer{}
if metaFlags&meta.Modified != 0 {
item.Pointer.CreationDate = pr.GetCreationDate()
}
if metaFlags&meta.Expiration != 0 {
item.Pointer.ExpirationDate = pr.GetExpirationDate()
}
if metaFlags&meta.Size != 0 {
item.Pointer.Size = pr.GetSize()
}
if metaFlags&meta.UserDefined != 0 {
item.Pointer.Metadata = pr.GetMetadata()
}
return nil
}
// Delete formats and hands off a file path to delete from boltdb
func (s *Server) Delete(ctx context.Context, req *pb.DeleteRequest) (resp *pb.DeleteResponse, err error) {
defer mon.Task()(&ctx)(&err)
s.logger.Debug("entering pointerdb delete")
if err = s.validateAuth(ctx); err != nil {
return nil, err
}
err = s.DB.Delete([]byte(req.GetPath()))
if err != nil {
s.logger.Error("err deleting path and pointer", zap.Error(err))
return nil, status.Errorf(codes.Internal, err.Error())
}
s.logger.Debug("deleted pointer at path: " + req.GetPath())
return &pb.DeleteResponse{}, nil
}
// Iterate iterates over items based on IterateRequest
func (s *Server) Iterate(ctx context.Context, req *pb.IterateRequest, f func(it storage.Iterator) error) error {
opts := storage.IterateOptions{
Prefix: storage.Key(req.Prefix),
First: storage.Key(req.First),
Recurse: req.Recurse,
Reverse: req.Reverse,
}
return s.DB.Iterate(opts, f)
}