frostfs-sdk-go/client/session.go

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package client
import (
"context"
"crypto/ecdsa"
"github.com/TrueCloudLab/frostfs-api-go/v2/refs"
rpcapi "github.com/TrueCloudLab/frostfs-api-go/v2/rpc"
"github.com/TrueCloudLab/frostfs-api-go/v2/rpc/client"
v2session "github.com/TrueCloudLab/frostfs-api-go/v2/session"
"github.com/TrueCloudLab/frostfs-sdk-go/user"
)
// PrmSessionCreate groups parameters of SessionCreate operation.
type PrmSessionCreate struct {
prmCommonMeta
exp uint64
keySet bool
key ecdsa.PrivateKey
}
// SetExp sets number of the last NepFS epoch in the lifetime of the session after which it will be expired.
func (x *PrmSessionCreate) SetExp(exp uint64) {
x.exp = exp
}
// UseKey specifies private key to sign the requests and compute token owner.
// If key is not provided, then Client default key is used.
func (x *PrmSessionCreate) UseKey(key ecdsa.PrivateKey) {
x.keySet = true
x.key = key
}
// ResSessionCreate groups resulting values of SessionCreate operation.
type ResSessionCreate struct {
statusRes
id []byte
sessionKey []byte
}
func (x *ResSessionCreate) setID(id []byte) {
x.id = id
}
// ID returns identifier of the opened session in a binary FrostFS API protocol format.
//
// Client doesn't retain value so modification is safe.
func (x ResSessionCreate) ID() []byte {
return x.id
}
func (x *ResSessionCreate) setSessionKey(key []byte) {
x.sessionKey = key
}
// PublicKey returns public key of the opened session in a binary FrostFS API protocol format.
func (x ResSessionCreate) PublicKey() []byte {
return x.sessionKey
}
// SessionCreate opens a session with the node server on the remote endpoint.
// The session lifetime coincides with the server lifetime. Results can be written
// to session token which can be later attached to the requests.
//
// 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 `error`.
// If PrmInit.ResolveFrostFSFailures has been called, unsuccessful
// FrostFS status codes are returned as `error`, otherwise, are included
// in the returned result structure.
//
// Immediately panics if parameters are set incorrectly (see PrmSessionCreate docs).
// Context is required and must not be nil. It is used for network communication.
//
// Return statuses:
// - global (see Client docs).
func (c *Client) SessionCreate(ctx context.Context, prm PrmSessionCreate) (*ResSessionCreate, error) {
// check context
if ctx == nil {
panic(panicMsgMissingContext)
}
ownerKey := c.prm.key.PublicKey
if prm.keySet {
ownerKey = prm.key.PublicKey
}
var ownerID user.ID
user.IDFromKey(&ownerID, ownerKey)
var ownerIDV2 refs.OwnerID
ownerID.WriteToV2(&ownerIDV2)
// form request body
reqBody := new(v2session.CreateRequestBody)
reqBody.SetOwnerID(&ownerIDV2)
reqBody.SetExpiration(prm.exp)
// for request
var req v2session.CreateRequest
req.SetBody(reqBody)
// init call context
var (
cc contextCall
res ResSessionCreate
)
c.initCallContext(&cc)
if prm.keySet {
cc.key = prm.key
}
cc.meta = prm.prmCommonMeta
cc.req = &req
cc.statusRes = &res
cc.call = func() (responseV2, error) {
return rpcapi.CreateSession(&c.c, &req, client.WithContext(ctx))
}
cc.result = func(r responseV2) {
resp := r.(*v2session.CreateResponse)
body := resp.GetBody()
res.setID(body.GetID())
res.setSessionKey(body.GetSessionKey())
}
// process call
if !cc.processCall() {
return nil, cc.err
}
return &res, nil
}