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client: Provide the ability to create slicer.Slicer instance

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`CreateObject` function uses `slicer.Slicer` to read data encapsulated
behind `io.Reader` and store it in the NeoFS network. Sometimes there is
a need to init data writer (`io.Writer`)` instead of providing reader.
To cover such use-cases, it's worth to expose slicer's constructor based
on client.

Add `NewDataSlicer` constructor. Use the function in `CreateObject`.

Refs #342.

Signed-off-by: Leonard Lyubich <leonard@morphbits.io>
This commit is contained in:
Leonard Lyubich 2023-04-26 17:00:00 +04:00
parent e2011832eb
commit 153695a03d
1 changed files with 21 additions and 5 deletions
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26
client/object_put.go
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@ -332,9 +332,27 @@ func (x *payloadWriter) Close() error {
// future. Be ready to refactor your code regarding imports and call mechanics,
// in essence the operation will not change.
func CreateObject(ctx context.Context, cli *Client, signer neofscrypto.Signer, cnr cid.ID, owner user.ID, data io.Reader, attributes ...string) (oid.ID, error) {
s, err := NewDataSlicer(ctx, cli, signer, cnr, owner)
if err != nil {
return oid.ID{}, err
}
return s.Slice(data, attributes...)
}
// NewDataSlicer creates slicer.Slicer that saves data in the NeoFS network
// through provided Client. The data is packaged into NeoFS objects stored in
// the specified container. Provided signer is being used to sign the resulting
// objects as a system requirement. Produced objects are owned by the
// parameterized NeoFS user.
//
// Notice: This API is EXPERIMENTAL and is planned to be replaced/changed in the
// future. Be ready to refactor your code regarding imports and call mechanics,
// in essence the operation will not change.
func NewDataSlicer(ctx context.Context, cli *Client, signer neofscrypto.Signer, cnr cid.ID, owner user.ID) (*slicer.Slicer, error) {
resNetInfo, err := cli.NetworkInfo(ctx, PrmNetworkInfo{})
if err != nil {
return oid.ID{}, fmt.Errorf("read current network info: %w", err)
return nil, fmt.Errorf("read current network info: %w", err)
}
netInfo := resNetInfo.Info()
@ -346,10 +364,8 @@ func CreateObject(ctx context.Context, cli *Client, signer neofscrypto.Signer, c
opts.CalculateHomomorphicChecksum()
}
s := slicer.New(signer, cnr, owner, &objectWriter{
return slicer.New(signer, cnr, owner, &objectWriter{
context: ctx,
client: cli,
}, opts)
return s.Slice(data, attributes...)
}, opts), nil
}