frostfs-sdk-go/client/object_put_raw.go
Anton Nikiforov 2f88460172 [#83] Allow to split objects in the client
Signed-off-by: Anton Nikiforov <an.nikiforov@yadro.com>
2023-06-28 12:12:37 +00:00

154 lines
4 KiB
Go

package client
import (
"context"
"crypto/ecdsa"
"errors"
"fmt"
"io"
v2object "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/object"
rpcapi "git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/rpc"
"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/rpc/client"
"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/signature"
apistatus "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/client/status"
"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
)
func (c *Client) objectPutInitRaw(ctx context.Context, prm PrmObjectPutInit) (*objectWriterRaw, error) {
var w objectWriterRaw
stream, err := rpcapi.PutObject(&c.c, &w.respV2, client.WithContext(ctx))
if err != nil {
return nil, fmt.Errorf("open stream: %w", err)
}
w.key = &c.prm.key
if prm.key != nil {
w.key = prm.key
}
w.client = c
w.stream = stream
w.partInit.SetCopiesNumber(prm.copyNum)
w.req.SetBody(new(v2object.PutRequestBody))
if prm.maxChunkLen > 0 {
w.maxChunkLen = prm.maxChunkLen
} else {
w.maxChunkLen = defaultGRPCPayloadChunkLen
}
c.prepareRequest(&w.req, &prm.meta)
return &w, nil
}
type objectWriterRaw struct {
client *Client
stream interface {
Write(*v2object.PutRequest) error
Close() error
}
key *ecdsa.PrivateKey
res ResObjectPut
err error
chunkCalled bool
respV2 v2object.PutResponse
req v2object.PutRequest
partInit v2object.PutObjectPartInit
partChunk v2object.PutObjectPartChunk
maxChunkLen int
}
func (x *objectWriterRaw) WriteHeader(_ context.Context, hdr object.Object) bool {
v2Hdr := hdr.ToV2()
x.partInit.SetObjectID(v2Hdr.GetObjectID())
x.partInit.SetHeader(v2Hdr.GetHeader())
x.partInit.SetSignature(v2Hdr.GetSignature())
x.req.GetBody().SetObjectPart(&x.partInit)
x.req.SetVerificationHeader(nil)
x.err = signature.SignServiceMessage(x.key, &x.req)
if x.err != nil {
x.err = fmt.Errorf("sign message: %w", x.err)
return false
}
x.err = x.stream.Write(&x.req)
return x.err == nil
}
func (x *objectWriterRaw) WritePayloadChunk(_ context.Context, chunk []byte) bool {
if !x.chunkCalled {
x.chunkCalled = true
x.req.GetBody().SetObjectPart(&x.partChunk)
}
for ln := len(chunk); ln > 0; ln = len(chunk) {
if ln > x.maxChunkLen {
ln = x.maxChunkLen
}
// we deal with size limit overflow above, but there is another case:
// what if method is called with "small" chunk many times? We write
// a message to the stream on each call. Alternatively, we could use buffering.
// In most cases, the chunk length does not vary between calls. Given this
// assumption, as well as the length of the payload from the header, it is
// possible to buffer the data of intermediate chunks, and send a message when
// the allocated buffer is filled, or when the last chunk is received.
// It is mentally assumed that allocating and filling the buffer is better than
// synchronous sending, but this needs to be tested.
x.partChunk.SetChunk(chunk[:ln])
x.req.SetVerificationHeader(nil)
x.err = signature.SignServiceMessage(x.key, &x.req)
if x.err != nil {
x.err = fmt.Errorf("sign message: %w", x.err)
return false
}
x.err = x.stream.Write(&x.req)
if x.err != nil {
return false
}
chunk = chunk[ln:]
}
return true
}
func (x *objectWriterRaw) Close(_ context.Context) (*ResObjectPut, error) {
// Ignore io.EOF error, because it is expected error for client-side
// stream termination by the server. E.g. when stream contains invalid
// message. Server returns an error in response message (in status).
if x.err != nil && !errors.Is(x.err, io.EOF) {
return nil, x.err
}
if x.err = x.stream.Close(); x.err != nil {
return nil, x.err
}
x.res.st, x.err = x.client.processResponse(&x.respV2)
if x.err != nil {
return nil, x.err
}
if !apistatus.IsSuccessful(x.res.st) {
return &x.res, nil
}
const fieldID = "ID"
idV2 := x.respV2.GetBody().GetObjectID()
if idV2 == nil {
return nil, newErrMissingResponseField(fieldID)
}
x.err = x.res.obj.ReadFromV2(*idV2)
if x.err != nil {
x.err = newErrInvalidResponseField(fieldID, x.err)
}
return &x.res, nil
}