frostfs-s3-gw/api/layer/notifications.go
Angira Kekteeva 4454821285 [#340] Add notification configuration handlers
Signed-off-by: Angira Kekteeva <kira@nspcc.ru>
2022-02-18 16:59:42 +03:00

146 lines
3.5 KiB
Go

package layer
import (
"bytes"
"context"
"encoding/xml"
"io"
"github.com/google/uuid"
"github.com/nspcc-dev/neofs-s3-gw/api/data"
"github.com/nspcc-dev/neofs-s3-gw/api/errors"
"go.uber.org/zap"
)
type (
PutBucketNotificationConfigurationParams struct {
BktInfo *data.BucketInfo
Reader io.Reader
}
)
func (n *layer) PutBucketNotificationConfiguration(ctx context.Context, p *PutBucketNotificationConfigurationParams) error {
if !n.IsNotificationEnabled() {
return errors.GetAPIError(errors.ErrNotificationNotEnabled)
}
var (
buf bytes.Buffer
tee = io.TeeReader(p.Reader, &buf)
conf = &data.NotificationConfiguration{}
completed bool
err error
)
if err = xml.NewDecoder(tee).Decode(conf); err != nil {
return errors.GetAPIError(errors.ErrMalformedXML)
}
if completed, err = n.checkAndCompleteNotificationConfiguration(conf); err != nil {
return err
}
if completed {
confXML, err := xml.Marshal(conf)
if err != nil {
return err
}
buf.Reset()
buf.Write(confXML)
}
s := &PutSystemObjectParams{
BktInfo: p.BktInfo,
ObjName: p.BktInfo.NotificationConfigurationObjectName(),
Metadata: map[string]string{},
Prefix: "",
Reader: &buf,
}
obj, err := n.putSystemObjectIntoNeoFS(ctx, s)
if err != nil {
return err
}
if obj.Size == 0 && !conf.IsEmpty() {
return errors.GetAPIError(errors.ErrInternalError)
}
if err = n.systemCache.PutNotificationConfiguration(systemObjectKey(p.BktInfo, s.ObjName), conf); err != nil {
n.log.Error("couldn't cache system object", zap.Error(err))
}
return nil
}
func (n *layer) GetBucketNotificationConfiguration(ctx context.Context, bktInfo *data.BucketInfo) (*data.NotificationConfiguration, error) {
if !n.IsNotificationEnabled() {
return nil, errors.GetAPIError(errors.ErrNotificationNotEnabled)
}
conf, err := n.getNotificationConf(ctx, bktInfo, bktInfo.NotificationConfigurationObjectName())
if err != nil {
if errors.IsS3Error(err, errors.ErrNoSuchKey) {
return &data.NotificationConfiguration{}, nil
}
return nil, err
}
return conf, nil
}
func (n *layer) getNotificationConf(ctx context.Context, bkt *data.BucketInfo, sysName string) (*data.NotificationConfiguration, error) {
if conf := n.systemCache.GetNotificationConfiguration(systemObjectKey(bkt, sysName)); conf != nil {
return conf, nil
}
obj, err := n.getSystemObjectFromNeoFS(ctx, bkt, sysName)
if err != nil {
return nil, err
}
conf := &data.NotificationConfiguration{}
if err = xml.Unmarshal(obj.Payload(), &conf); err != nil {
return nil, err
}
if err = n.systemCache.PutNotificationConfiguration(systemObjectKey(bkt, sysName), conf); err != nil {
n.log.Warn("couldn't put system meta to objects cache",
zap.Stringer("object id", obj.ID()),
zap.Stringer("bucket id", bkt.CID),
zap.Error(err))
}
return conf, nil
}
func (n *layer) checkAndCompleteNotificationConfiguration(c *data.NotificationConfiguration) (completed bool, err error) {
if c == nil {
return
}
if c.TopicConfigurations != nil || c.LambdaFunctionConfigurations != nil {
return completed, errors.GetAPIError(errors.ErrNotificationTopicNotSupported)
}
for i, q := range c.QueueConfigurations {
if err = checkEvents(q.Events); err != nil {
return
}
if q.ID == "" {
completed = true
c.QueueConfigurations[i].ID = uuid.NewString()
}
}
return
}
func checkEvents(events []string) error {
for _, e := range events {
if _, ok := data.ValidEvents[e]; !ok {
return errors.GetAPIError(errors.ErrEventNotification)
}
}
return nil
}