package neofsapiclient import ( "context" "crypto/ecdsa" "errors" "fmt" "io" clientcore "github.com/nspcc-dev/neofs-node/pkg/core/client" "github.com/nspcc-dev/neofs-node/pkg/services/object_manager/storagegroup" "github.com/nspcc-dev/neofs-sdk-go/client" apistatus "github.com/nspcc-dev/neofs-sdk-go/client/status" cid "github.com/nspcc-dev/neofs-sdk-go/container/id" "github.com/nspcc-dev/neofs-sdk-go/object" addressSDK "github.com/nspcc-dev/neofs-sdk-go/object/address" oid "github.com/nspcc-dev/neofs-sdk-go/object/id" ) // Client represents NeoFS API client cut down to the needs of a purely IR application. type Client struct { key *ecdsa.PrivateKey c clientcore.Client } // WrapBasicClient wraps client.Client instance to use it for NeoFS API RPC. func (x *Client) WrapBasicClient(c clientcore.Client) { x.c = c } // SetPrivateKey sets private key to sign RPC requests. func (x *Client) SetPrivateKey(key *ecdsa.PrivateKey) { x.key = key } // SearchSGPrm groups parameters of SearchSG operation. type SearchSGPrm struct { contextPrm cnrID *cid.ID } // SetContainerID sets ID of the container to search for storage groups. func (x *SearchSGPrm) SetContainerID(id *cid.ID) { x.cnrID = id } // SearchSGRes groups resulting values of SearchSG operation. type SearchSGRes struct { cliRes []*oid.ID } // IDList returns list of IDs of storage groups in container. func (x SearchSGRes) IDList() []*oid.ID { return x.cliRes } var sgFilter = storagegroup.SearchQuery() // SearchSG lists objects of storage group type in the container. // // Returns any error prevented the operation from completing correctly in error return. func (x Client) SearchSG(prm SearchSGPrm) (*SearchSGRes, error) { var cliPrm client.PrmObjectSearch cliPrm.InContainer(*prm.cnrID) cliPrm.SetFilters(sgFilter) rdr, err := x.c.ObjectSearchInit(prm.ctx, cliPrm) if err != nil { return nil, fmt.Errorf("init object search: %w", err) } rdr.UseKey(*x.key) buf := make([]oid.ID, 10) var list []*oid.ID var n int var ok bool for { n, ok = rdr.Read(buf) for i := 0; i < n; i++ { v := buf[i] list = append(list, &v) } if !ok { break } } res, err := rdr.Close() if err == nil { // pull out an error from status err = apistatus.ErrFromStatus(res.Status()) } if err != nil { return nil, fmt.Errorf("read object list: %w", err) } return &SearchSGRes{ cliRes: list, }, nil } // GetObjectPrm groups parameters of GetObject operation. type GetObjectPrm struct { getObjectPrm } // GetObjectRes groups resulting values of GetObject operation. type GetObjectRes struct { obj *object.Object } // Object returns received object. func (x GetObjectRes) Object() *object.Object { return x.obj } // GetObject reads the object by address. // // Returns any error prevented the operation from completing correctly in error return. func (x Client) GetObject(prm GetObjectPrm) (*GetObjectRes, error) { var cliPrm client.PrmObjectGet if id := prm.objAddr.ContainerID(); id != nil { cliPrm.FromContainer(*id) } if id := prm.objAddr.ObjectID(); id != nil { cliPrm.ByID(*id) } rdr, err := x.c.ObjectGetInit(prm.ctx, cliPrm) if err != nil { return nil, fmt.Errorf("init object search: %w", err) } rdr.UseKey(*x.key) var obj object.Object if !rdr.ReadHeader(&obj) { res, err := rdr.Close() if err == nil { // pull out an error from status err = apistatus.ErrFromStatus(res.Status()) } return nil, fmt.Errorf("read object header: %w", err) } buf := make([]byte, obj.PayloadSize()) _, err = rdr.Read(buf) if err != nil && !errors.Is(err, io.EOF) { return nil, fmt.Errorf("read payload: %w", err) } obj.SetPayload(buf) return &GetObjectRes{ obj: &obj, }, nil } // HeadObjectPrm groups parameters of HeadObject operation. type HeadObjectPrm struct { getObjectPrm raw bool local bool } // SetRawFlag sets flag of raw request. func (x *HeadObjectPrm) SetRawFlag() { x.raw = true } // SetTTL sets request TTL value. func (x *HeadObjectPrm) SetTTL(ttl uint32) { x.local = ttl < 2 } // HeadObjectRes groups resulting values of HeadObject operation. type HeadObjectRes struct { hdr *object.Object } // Header returns received object header. func (x HeadObjectRes) Header() *object.Object { return x.hdr } // HeadObject reads short object header by address. // // Returns any error prevented the operation from completing correctly in error return. // For raw requests, returns *object.SplitInfoError error if requested object is virtual. func (x Client) HeadObject(prm HeadObjectPrm) (*HeadObjectRes, error) { var cliPrm client.PrmObjectHead if prm.raw { cliPrm.MarkRaw() } if prm.local { cliPrm.MarkLocal() } if id := prm.objAddr.ContainerID(); id != nil { cliPrm.FromContainer(*id) } if id := prm.objAddr.ObjectID(); id != nil { cliPrm.ByID(*id) } cliRes, err := x.c.ObjectHead(prm.ctx, cliPrm) if err == nil { // pull out an error from status err = apistatus.ErrFromStatus(cliRes.Status()) } if err != nil { return nil, fmt.Errorf("read object header from NeoFS: %w", err) } var hdr object.Object if !cliRes.ReadHeader(&hdr) { return nil, errors.New("missing object header in the response") } return &HeadObjectRes{ hdr: &hdr, }, nil } // GetObjectPayload reads object by address from NeoFS via Client and returns its payload. // // Returns any error prevented the operation from completing correctly in error return. func GetObjectPayload(ctx context.Context, c Client, addr *addressSDK.Address) ([]byte, error) { var prm GetObjectPrm prm.SetContext(ctx) prm.SetAddress(addr) obj, err := c.GetObject(prm) if err != nil { return nil, err } return obj.Object().Payload(), nil } func headObject(ctx context.Context, c Client, addr *addressSDK.Address, raw bool, ttl uint32) (*object.Object, error) { var prm HeadObjectPrm prm.SetContext(ctx) prm.SetAddress(addr) prm.SetTTL(ttl) if raw { prm.SetRawFlag() } obj, err := c.HeadObject(prm) if err != nil { return nil, err } return obj.Header(), nil } // GetRawObjectHeaderLocally reads raw short object header from server's local storage by address via Client. func GetRawObjectHeaderLocally(ctx context.Context, c Client, addr *addressSDK.Address) (*object.Object, error) { return headObject(ctx, c, addr, true, 1) } // GetObjectHeaderFromContainer reads short object header by address via Client with TTL = 10 // for deep traversal of the container. func GetObjectHeaderFromContainer(ctx context.Context, c Client, addr *addressSDK.Address) (*object.Object, error) { return headObject(ctx, c, addr, false, 10) } // HashPayloadRangePrm groups parameters of HashPayloadRange operation. type HashPayloadRangePrm struct { getObjectPrm rng *object.Range } // SetRange sets payload range to calculate the hash. func (x *HashPayloadRangePrm) SetRange(rng *object.Range) { x.rng = rng } // HashPayloadRangeRes groups resulting values of HashPayloadRange operation. type HashPayloadRangeRes struct { h []byte } // Hash returns hash of the object payload range. func (x HashPayloadRangeRes) Hash() []byte { return x.h } // HashPayloadRange requests to calculate Tillich-Zemor hash of the payload range of the object // from the remote server's local storage. // // Returns any error prevented the operation from completing correctly in error return. func (x Client) HashPayloadRange(prm HashPayloadRangePrm) (res HashPayloadRangeRes, err error) { var cliPrm client.PrmObjectHash if id := prm.objAddr.ContainerID(); id != nil { cliPrm.FromContainer(*id) } if id := prm.objAddr.ObjectID(); id != nil { cliPrm.ByID(*id) } cliPrm.SetRangeList(prm.rng.GetOffset(), prm.rng.GetLength()) cliPrm.TillichZemorAlgo() cliRes, err := x.c.ObjectHash(prm.ctx, cliPrm) if err == nil { // pull out an error from status err = apistatus.ErrFromStatus(cliRes.Status()) if err != nil { return } hs := cliRes.Checksums() if ln := len(hs); ln != 1 { err = fmt.Errorf("wrong number of checksums %d", ln) } else { res.h = hs[0] } } return } // HashObjectRange reads Tillich-Zemor hash of the object payload range by address // from the remote server's local storage via Client. // // Returns any error prevented the operation from completing correctly in error return. func HashObjectRange(ctx context.Context, c Client, addr *addressSDK.Address, rng *object.Range) ([]byte, error) { var prm HashPayloadRangePrm prm.SetContext(ctx) prm.SetAddress(addr) prm.SetRange(rng) res, err := c.HashPayloadRange(prm) if err != nil { return nil, err } return res.Hash(), nil }