forked from TrueCloudLab/frostfs-node
98 lines
2.6 KiB
Go
98 lines
2.6 KiB
Go
package headsvc
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import (
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"context"
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"errors"
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"fmt"
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clientcore "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/client"
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netmapCore "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/netmap"
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internalclient "git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/object/internal/client"
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"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/services/object/util"
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"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/netmap"
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"git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
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oid "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object/id"
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)
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type ClientConstructor interface {
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Get(clientcore.NodeInfo) (clientcore.MultiAddressClient, error)
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}
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// RemoteHeader represents utility for getting
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// the object header from a remote host.
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type RemoteHeader struct {
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keyStorage *util.KeyStorage
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clientCache ClientConstructor
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}
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// RemoteHeadPrm groups remote header operation parameters.
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type RemoteHeadPrm struct {
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commonHeadPrm *Prm
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node netmap.NodeInfo
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}
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const remoteOpTTL = 1
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var ErrNotFound = errors.New("object header not found")
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// NewRemoteHeader creates, initializes and returns new RemoteHeader instance.
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func NewRemoteHeader(keyStorage *util.KeyStorage, cache ClientConstructor) *RemoteHeader {
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return &RemoteHeader{
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keyStorage: keyStorage,
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clientCache: cache,
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}
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}
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// WithNodeInfo sets information about the remote node.
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func (p *RemoteHeadPrm) WithNodeInfo(v netmap.NodeInfo) *RemoteHeadPrm {
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if p != nil {
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p.node = v
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}
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return p
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}
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// WithObjectAddress sets object address.
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func (p *RemoteHeadPrm) WithObjectAddress(v oid.Address) *RemoteHeadPrm {
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if p != nil {
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p.commonHeadPrm = new(Prm).WithAddress(v)
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}
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return p
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}
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// Head requests object header from the remote node.
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func (h *RemoteHeader) Head(ctx context.Context, prm *RemoteHeadPrm) (*object.Object, error) {
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key, err := h.keyStorage.GetKey(nil)
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if err != nil {
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return nil, fmt.Errorf("(%T) could not receive private key: %w", h, err)
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}
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var info clientcore.NodeInfo
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err = clientcore.NodeInfoFromRawNetmapElement(&info, netmapCore.Node(prm.node))
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if err != nil {
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return nil, fmt.Errorf("parse client node info: %w", err)
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}
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c, err := h.clientCache.Get(info)
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if err != nil {
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return nil, fmt.Errorf("(%T) could not create SDK client %s: %w", h, info.AddressGroup(), err)
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}
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var headPrm internalclient.HeadObjectPrm
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headPrm.SetClient(c)
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headPrm.SetPrivateKey(key)
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headPrm.SetAddress(prm.commonHeadPrm.addr)
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headPrm.SetTTL(remoteOpTTL)
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res, err := internalclient.HeadObject(ctx, headPrm)
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if err != nil {
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return nil, fmt.Errorf("(%T) could not head object in %s: %w", h, info.AddressGroup(), err)
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}
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return res.Header(), nil
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}
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