frostfs-s3-gw/api/layer/cors.go

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package layer
import (
"bytes"
"context"
"encoding/xml"
errorsStd "errors"
"fmt"
"io"
"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/data"
"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/errors"
"git.frostfs.info/TrueCloudLab/frostfs-s3-gw/internal/logs"
"go.uber.org/zap"
)
const wildcard = "*"
var supportedMethods = map[string]struct{}{"GET": {}, "HEAD": {}, "POST": {}, "PUT": {}, "DELETE": {}}
func (n *layer) PutBucketCORS(ctx context.Context, p *PutCORSParams) error {
var (
buf bytes.Buffer
tee = io.TeeReader(p.Reader, &buf)
cors = &data.CORSConfiguration{}
)
if err := xml.NewDecoder(tee).Decode(cors); err != nil {
return fmt.Errorf("xml decode cors: %w", err)
}
if cors.CORSRules == nil {
return errors.GetAPIError(errors.ErrMalformedXML)
}
if err := checkCORS(cors); err != nil {
return err
}
prm := PrmObjectCreate{
Container: p.BktInfo.CID,
Payload: &buf,
Filepath: p.BktInfo.CORSObjectName(),
CreationTime: TimeNow(ctx),
CopiesNumber: p.CopiesNumbers,
}
_, objID, _, _, err := n.objectPutAndHash(ctx, prm, p.BktInfo)
if err != nil {
return fmt.Errorf("put system object: %w", err)
}
objIDToDelete, err := n.treeService.PutBucketCORS(ctx, p.BktInfo, objID)
objIDToDeleteNotFound := errorsStd.Is(err, ErrNoNodeToRemove)
if err != nil && !objIDToDeleteNotFound {
return err
}
if !objIDToDeleteNotFound {
if err = n.objectDelete(ctx, p.BktInfo, objIDToDelete); err != nil {
n.reqLogger(ctx).Error(logs.CouldntDeleteCorsObject, zap.Error(err),
zap.String("cnrID", p.BktInfo.CID.EncodeToString()),
zap.String("objID", objIDToDelete.EncodeToString()))
}
}
n.cache.PutCORS(n.BearerOwner(ctx), p.BktInfo, cors)
return nil
}
func (n *layer) GetBucketCORS(ctx context.Context, bktInfo *data.BucketInfo) (*data.CORSConfiguration, error) {
cors, err := n.getCORS(ctx, bktInfo)
if err != nil {
if errorsStd.Is(err, ErrNodeNotFound) {
return nil, fmt.Errorf("%w: %s", errors.GetAPIError(errors.ErrNoSuchCORSConfiguration), err.Error())
}
return nil, err
}
return cors, nil
}
func (n *layer) DeleteBucketCORS(ctx context.Context, bktInfo *data.BucketInfo) error {
objID, err := n.treeService.DeleteBucketCORS(ctx, bktInfo)
objIDNotFound := errorsStd.Is(err, ErrNoNodeToRemove)
if err != nil && !objIDNotFound {
return err
}
if !objIDNotFound {
if err = n.objectDelete(ctx, bktInfo, objID); err != nil {
return err
}
}
n.cache.DeleteCORS(bktInfo)
return nil
}
func checkCORS(cors *data.CORSConfiguration) error {
for _, r := range cors.CORSRules {
for _, m := range r.AllowedMethods {
if _, ok := supportedMethods[m]; !ok {
return errors.GetAPIErrorWithError(errors.ErrCORSUnsupportedMethod, fmt.Errorf("unsupported method is %s", m))
}
}
for _, h := range r.ExposeHeaders {
if h == wildcard {
return errors.GetAPIError(errors.ErrCORSWildcardExposeHeaders)
}
}
}
return nil
}