299 lines
7 KiB
Go
299 lines
7 KiB
Go
package client
|
|
|
|
import (
|
|
"context"
|
|
"crypto/ecdsa"
|
|
"errors"
|
|
"fmt"
|
|
"io"
|
|
|
|
v2object "github.com/nspcc-dev/neofs-api-go/v2/object"
|
|
v2refs "github.com/nspcc-dev/neofs-api-go/v2/refs"
|
|
rpcapi "github.com/nspcc-dev/neofs-api-go/v2/rpc"
|
|
"github.com/nspcc-dev/neofs-api-go/v2/rpc/client"
|
|
v2session "github.com/nspcc-dev/neofs-api-go/v2/session"
|
|
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"
|
|
oid "github.com/nspcc-dev/neofs-sdk-go/object/id"
|
|
"github.com/nspcc-dev/neofs-sdk-go/session"
|
|
"github.com/nspcc-dev/neofs-sdk-go/token"
|
|
)
|
|
|
|
// PrmObjectSearch groups parameters of ObjectSearch operation.
|
|
type PrmObjectSearch struct {
|
|
local bool
|
|
|
|
sessionSet bool
|
|
session session.Token
|
|
|
|
bearerSet bool
|
|
bearer token.BearerToken
|
|
|
|
cnrSet bool
|
|
cnr cid.ID
|
|
|
|
filters object.SearchFilters
|
|
}
|
|
|
|
// MarkLocal tells the server to execute the operation locally.
|
|
func (x *PrmObjectSearch) MarkLocal() {
|
|
x.local = true
|
|
}
|
|
|
|
// WithinSession specifies session within which the search query must be executed.
|
|
//
|
|
// Creator of the session acquires the authorship of the request.
|
|
// This may affect the execution of an operation (e.g. access control).
|
|
//
|
|
// Must be signed.
|
|
func (x *PrmObjectSearch) WithinSession(t session.Token) {
|
|
x.session = t
|
|
x.sessionSet = true
|
|
}
|
|
|
|
// WithBearerToken attaches bearer token to be used for the operation.
|
|
//
|
|
// If set, underlying eACL rules will be used in access control.
|
|
//
|
|
// Must be signed.
|
|
func (x *PrmObjectSearch) WithBearerToken(t token.BearerToken) {
|
|
x.bearer = t
|
|
x.bearerSet = true
|
|
}
|
|
|
|
// InContainer specifies the container in which to look for objects.
|
|
// Required parameter.
|
|
func (x *PrmObjectSearch) InContainer(id cid.ID) {
|
|
x.cnr = id
|
|
x.cnrSet = true
|
|
}
|
|
|
|
// SetFilters sets filters by which to select objects. All container objects
|
|
// match unset/empty filters.
|
|
func (x *PrmObjectSearch) SetFilters(filters object.SearchFilters) {
|
|
x.filters = filters
|
|
}
|
|
|
|
// ResObjectSearch groups the final result values of ObjectSearch operation.
|
|
type ResObjectSearch struct {
|
|
statusRes
|
|
}
|
|
|
|
// ObjectListReader is designed to read list of object identifiers from NeoFS system.
|
|
//
|
|
// Must be initialized using Client.ObjectSearch, any other usage is unsafe.
|
|
type ObjectListReader struct {
|
|
cancelCtxStream context.CancelFunc
|
|
|
|
ctxCall contextCall
|
|
|
|
reqWritten bool
|
|
|
|
// initially bound to contextCall
|
|
bodyResp v2object.SearchResponseBody
|
|
|
|
tail []*v2refs.ObjectID
|
|
}
|
|
|
|
// UseKey specifies private key to sign the requests.
|
|
// If key is not provided, then Client default key is used.
|
|
func (x *ObjectListReader) UseKey(key ecdsa.PrivateKey) {
|
|
x.ctxCall.key = key
|
|
}
|
|
|
|
// Read reads another list of the object identifiers. Works similar to
|
|
// io.Reader.Read but copies oid.ID and returns success flag instead of error.
|
|
//
|
|
// Failure reason can be received via Close.
|
|
//
|
|
// Panics if buf has zero length.
|
|
func (x *ObjectListReader) Read(buf []oid.ID) (int, bool) {
|
|
if len(buf) == 0 {
|
|
panic("empty buffer in ObjectListReader.ReadList")
|
|
}
|
|
|
|
if !x.reqWritten {
|
|
if !x.ctxCall.writeRequest() {
|
|
return 0, false
|
|
}
|
|
|
|
x.reqWritten = true
|
|
}
|
|
|
|
// read remaining tail
|
|
read := len(x.tail)
|
|
if read > len(buf) {
|
|
read = len(buf)
|
|
}
|
|
|
|
for i := 0; i < read; i++ {
|
|
buf[i] = *oid.NewIDFromV2(x.tail[i]) // need smth better
|
|
}
|
|
|
|
x.tail = x.tail[read:]
|
|
|
|
if len(buf) == read {
|
|
return read, true
|
|
}
|
|
|
|
var ok bool
|
|
var ids []*v2refs.ObjectID
|
|
var i, ln, rem int
|
|
|
|
for {
|
|
// receive next message
|
|
ok = x.ctxCall.readResponse()
|
|
if !ok {
|
|
return read, false
|
|
}
|
|
|
|
// read new chunk of objects
|
|
ids = x.bodyResp.GetIDList()
|
|
|
|
ln = len(ids)
|
|
if ln == 0 {
|
|
// just skip empty lists since they are not prohibited by protocol
|
|
continue
|
|
}
|
|
|
|
if rem = len(buf) - read; ln > rem {
|
|
ln = rem
|
|
}
|
|
|
|
for i = 0; i < ln; i++ {
|
|
buf[read+i] = *oid.NewIDFromV2(ids[i]) // need smth better
|
|
}
|
|
|
|
read += ln
|
|
|
|
if read == len(buf) {
|
|
// save the tail
|
|
x.tail = append(x.tail, ids[ln:]...)
|
|
|
|
return read, true
|
|
}
|
|
}
|
|
}
|
|
|
|
// Iterate iterates over the list of found object identifiers.
|
|
// f can return true to stop iteration earlier.
|
|
//
|
|
// Returns an error if object can't be read.
|
|
func (x *ObjectListReader) Iterate(f func(oid.ID) bool) error {
|
|
buf := make([]oid.ID, 1)
|
|
|
|
for {
|
|
// Do not check first return value because `len(buf) == 1`,
|
|
// so false means nothing was read.
|
|
_, ok := x.Read(buf)
|
|
if !ok {
|
|
res, err := x.Close()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
return apistatus.ErrFromStatus(res.Status())
|
|
}
|
|
if f(buf[0]) {
|
|
return nil
|
|
}
|
|
}
|
|
}
|
|
|
|
// Close ends reading list of the matched objects and returns the result of the operation
|
|
// along with the final results. Must be called after using the ObjectListReader.
|
|
//
|
|
// Exactly one return value is non-nil. By default, server status is returned in res structure.
|
|
// Any client's internal or transport errors are returned as Go built-in error.
|
|
// If Client is tuned to resolve NeoFS API statuses, then NeoFS failures
|
|
// codes are returned as error.
|
|
//
|
|
// Return statuses:
|
|
// global (see Client docs).
|
|
func (x *ObjectListReader) Close() (*ResObjectSearch, error) {
|
|
defer x.cancelCtxStream()
|
|
|
|
if x.ctxCall.err != nil && !errors.Is(x.ctxCall.err, io.EOF) {
|
|
return nil, x.ctxCall.err
|
|
}
|
|
|
|
return x.ctxCall.statusRes.(*ResObjectSearch), nil
|
|
}
|
|
|
|
// ObjectSearchInit initiates object selection through a remote server using NeoFS API protocol.
|
|
//
|
|
// The call only opens the transmission channel, explicit fetching of matched objects
|
|
// is done using the ObjectListReader. Exactly one return value is non-nil.
|
|
// Resulting reader must be finally closed.
|
|
//
|
|
// Immediately panics if parameters are set incorrectly (see PrmObjectSearch docs).
|
|
// Context is required and must not be nil. It is used for network communication.
|
|
func (c *Client) ObjectSearchInit(ctx context.Context, prm PrmObjectSearch) (*ObjectListReader, error) {
|
|
// check parameters
|
|
switch {
|
|
case ctx == nil:
|
|
panic(panicMsgMissingContext)
|
|
case !prm.cnrSet:
|
|
panic(panicMsgMissingContainer)
|
|
}
|
|
|
|
// form request body
|
|
var body v2object.SearchRequestBody
|
|
|
|
body.SetVersion(1)
|
|
body.SetContainerID(prm.cnr.ToV2())
|
|
body.SetFilters(prm.filters.ToV2())
|
|
|
|
// form meta header
|
|
var meta v2session.RequestMetaHeader
|
|
|
|
if prm.local {
|
|
meta.SetTTL(1)
|
|
}
|
|
|
|
if prm.bearerSet {
|
|
meta.SetBearerToken(prm.bearer.ToV2())
|
|
}
|
|
|
|
if prm.sessionSet {
|
|
meta.SetSessionToken(prm.session.ToV2())
|
|
}
|
|
|
|
// form request
|
|
var req v2object.SearchRequest
|
|
|
|
req.SetBody(&body)
|
|
req.SetMetaHeader(&meta)
|
|
|
|
// init reader
|
|
var (
|
|
r ObjectListReader
|
|
resp v2object.SearchResponse
|
|
stream *rpcapi.SearchResponseReader
|
|
)
|
|
|
|
ctx, r.cancelCtxStream = context.WithCancel(ctx)
|
|
|
|
resp.SetBody(&r.bodyResp)
|
|
|
|
// init call context
|
|
c.initCallContext(&r.ctxCall)
|
|
r.ctxCall.req = &req
|
|
r.ctxCall.statusRes = new(ResObjectSearch)
|
|
r.ctxCall.resp = &resp
|
|
r.ctxCall.wReq = func() error {
|
|
var err error
|
|
|
|
stream, err = rpcapi.SearchObjects(c.Raw(), &req, client.WithContext(ctx))
|
|
if err != nil {
|
|
return fmt.Errorf("open stream: %w", err)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
r.ctxCall.rResp = func() error {
|
|
return stream.Read(&resp)
|
|
}
|
|
|
|
return &r, nil
|
|
}
|