package handler import ( "net/http" "net/url" "regexp" "time" "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api" "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/auth" "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/api/layer" "git.frostfs.info/TrueCloudLab/frostfs-s3-gw/api/middleware" "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/session" "go.uber.org/zap" ) type copyObjectArgs struct { Conditional *conditionalArgs MetadataDirective string TaggingDirective string } const ( replaceDirective = "REPLACE" copyDirective = "COPY" ) var copySourceMatcher = auth.NewRegexpMatcher(regexp.MustCompile(`^/?(?P[a-z0-9.\-]{3,63})/(?P.+)$`)) // path2BucketObject returns a bucket and an object. func path2BucketObject(path string) (string, string, error) { matches := copySourceMatcher.GetSubmatches(path) if len(matches) != 2 { return "", "", errors.GetAPIError(errors.ErrInvalidRequest) } return matches["bucket_name"], matches["object_name"], nil } func (h *handler) CopyObjectHandler(w http.ResponseWriter, r *http.Request) { var ( err error versionID string metadata map[string]string tagSet map[string]string sessionTokenEACL *session.Container ctx = r.Context() reqInfo = middleware.GetReqInfo(ctx) containsACL = containsACLHeaders(r) ) src := r.Header.Get(api.AmzCopySource) // Check https://docs.aws.amazon.com/AmazonS3/latest/dev/ObjectVersioning.html // Regardless of whether you have enabled versioning, each object in your bucket // has a version ID. If you have not enabled versioning, Amazon S3 sets the value // of the version ID to null. If you have enabled versioning, Amazon S3 assigns a // unique version ID value for the object. if u, err := url.Parse(src); err == nil { versionID = u.Query().Get(api.QueryVersionID) src = u.Path } srcBucket, srcObject, err := path2BucketObject(src) if err != nil { h.logAndSendError(w, "invalid source copy", reqInfo, err) return } srcObjPrm := &layer.HeadObjectParams{ Object: srcObject, VersionID: versionID, } if srcObjPrm.BktInfo, err = h.getBucketAndCheckOwner(r, srcBucket, api.AmzSourceExpectedBucketOwner); err != nil { h.logAndSendError(w, "couldn't get source bucket", reqInfo, err) return } dstBktInfo, err := h.getBucketAndCheckOwner(r, reqInfo.BucketName) if err != nil { h.logAndSendError(w, "couldn't get target bucket", reqInfo, err) return } settings, err := h.obj.GetBucketSettings(ctx, dstBktInfo) if err != nil { h.logAndSendError(w, "could not get bucket settings", reqInfo, err) return } if containsACL { if sessionTokenEACL, err = getSessionTokenSetEACL(ctx); err != nil { h.logAndSendError(w, "could not get eacl session token from a box", reqInfo, err) return } } extendedSrcObjInfo, err := h.obj.GetExtendedObjectInfo(ctx, srcObjPrm) if err != nil { h.logAndSendError(w, "could not find object", reqInfo, err) return } srcObjInfo := extendedSrcObjInfo.ObjectInfo args, err := parseCopyObjectArgs(r.Header) if err != nil { h.logAndSendError(w, "could not parse request params", reqInfo, err) return } if isCopyingToItselfForbidden(reqInfo, srcBucket, srcObject, settings, args) { h.logAndSendError(w, "copying to itself without changing anything", reqInfo, errors.GetAPIError(errors.ErrInvalidCopyDest)) return } if args.MetadataDirective == replaceDirective { metadata = parseMetadata(r) } if args.TaggingDirective == replaceDirective { tagSet, err = parseTaggingHeader(r.Header) if err != nil { h.logAndSendError(w, "could not parse tagging header", reqInfo, err) return } } else { tagPrm := &layer.GetObjectTaggingParams{ ObjectVersion: &layer.ObjectVersion{ BktInfo: srcObjPrm.BktInfo, ObjectName: srcObject, VersionID: srcObjInfo.VersionID(), }, NodeVersion: extendedSrcObjInfo.NodeVersion, } _, tagSet, err = h.obj.GetObjectTagging(ctx, tagPrm) if err != nil { h.logAndSendError(w, "could not get object tagging", reqInfo, err) return } } encryptionParams, err := formEncryptionParams(r) if err != nil { h.logAndSendError(w, "invalid sse headers", reqInfo, err) return } if err = encryptionParams.MatchObjectEncryption(layer.FormEncryptionInfo(srcObjInfo.Headers)); err != nil { h.logAndSendError(w, "encryption doesn't match object", reqInfo, errors.GetAPIError(errors.ErrBadRequest), zap.Error(err)) return } if err = checkPreconditions(srcObjInfo, args.Conditional); err != nil { h.logAndSendError(w, "precondition failed", reqInfo, errors.GetAPIError(errors.ErrPreconditionFailed)) return } if metadata == nil { if len(srcObjInfo.ContentType) > 0 { srcObjInfo.Headers[api.ContentType] = srcObjInfo.ContentType } metadata = srcObjInfo.Headers } else if contentType := r.Header.Get(api.ContentType); len(contentType) > 0 { metadata[api.ContentType] = contentType } params := &layer.CopyObjectParams{ SrcObject: srcObjInfo, ScrBktInfo: srcObjPrm.BktInfo, DstBktInfo: dstBktInfo, DstObject: reqInfo.ObjectName, SrcSize: srcObjInfo.Size, Header: metadata, Encryption: encryptionParams, } params.CopiesNumbers, err = h.pickCopiesNumbers(metadata, dstBktInfo.LocationConstraint) if err != nil { h.logAndSendError(w, "invalid copies number", reqInfo, err) return } params.Lock, err = formObjectLock(ctx, dstBktInfo, settings.LockConfiguration, r.Header) if err != nil { h.logAndSendError(w, "could not form object lock", reqInfo, err) return } additional := []zap.Field{zap.String("src_bucket_name", srcBucket), zap.String("src_object_name", srcObject)} extendedDstObjInfo, err := h.obj.CopyObject(ctx, params) if err != nil { h.logAndSendError(w, "couldn't copy object", reqInfo, err, additional...) return } dstObjInfo := extendedDstObjInfo.ObjectInfo if err = middleware.EncodeToResponse(w, &CopyObjectResponse{LastModified: dstObjInfo.Created.UTC().Format(time.RFC3339), ETag: dstObjInfo.HashSum}); err != nil { h.logAndSendError(w, "something went wrong", reqInfo, err, additional...) return } if containsACL { newEaclTable, err := h.getNewEAclTable(r, dstBktInfo, dstObjInfo) if err != nil { h.logAndSendError(w, "could not get new eacl table", reqInfo, err) return } p := &layer.PutBucketACLParams{ BktInfo: dstBktInfo, EACL: newEaclTable, SessionToken: sessionTokenEACL, } if err = h.obj.PutBucketACL(ctx, p); err != nil { h.logAndSendError(w, "could not put bucket acl", reqInfo, err) return } } if tagSet != nil { tagPrm := &layer.PutObjectTaggingParams{ ObjectVersion: &layer.ObjectVersion{ BktInfo: dstBktInfo, ObjectName: reqInfo.ObjectName, VersionID: dstObjInfo.VersionID(), }, TagSet: tagSet, NodeVersion: extendedDstObjInfo.NodeVersion, } if _, err = h.obj.PutObjectTagging(ctx, tagPrm); err != nil { h.logAndSendError(w, "could not upload object tagging", reqInfo, err) return } } h.reqLogger(ctx).Info("object is copied", zap.Stringer("object_id", dstObjInfo.ID)) s := &SendNotificationParams{ Event: EventObjectCreatedCopy, NotificationInfo: data.NotificationInfoFromObject(dstObjInfo), BktInfo: dstBktInfo, ReqInfo: reqInfo, } if err = h.sendNotifications(ctx, s); err != nil { h.reqLogger(ctx).Error("couldn't send notification: %w", zap.Error(err)) } if encryptionParams.Enabled() { addSSECHeaders(w.Header(), r.Header) } } func isCopyingToItselfForbidden(reqInfo *middleware.ReqInfo, srcBucket string, srcObject string, settings *data.BucketSettings, args *copyObjectArgs) bool { if reqInfo.BucketName != srcBucket || reqInfo.ObjectName != srcObject { return false } if !settings.Unversioned() { return false } return args.MetadataDirective != replaceDirective } func parseCopyObjectArgs(headers http.Header) (*copyObjectArgs, error) { var err error args := &conditionalArgs{ IfMatch: headers.Get(api.AmzCopyIfMatch), IfNoneMatch: headers.Get(api.AmzCopyIfNoneMatch), } if args.IfModifiedSince, err = parseHTTPTime(headers.Get(api.AmzCopyIfModifiedSince)); err != nil { return nil, err } if args.IfUnmodifiedSince, err = parseHTTPTime(headers.Get(api.AmzCopyIfUnmodifiedSince)); err != nil { return nil, err } copyArgs := ©ObjectArgs{Conditional: args} copyArgs.MetadataDirective = headers.Get(api.AmzMetadataDirective) if !isValidDirective(copyArgs.MetadataDirective) { return nil, errors.GetAPIError(errors.ErrInvalidMetadataDirective) } copyArgs.TaggingDirective = headers.Get(api.AmzTaggingDirective) if !isValidDirective(copyArgs.TaggingDirective) { return nil, errors.GetAPIError(errors.ErrInvalidTaggingDirective) } return copyArgs, nil } func isValidDirective(directive string) bool { return len(directive) == 0 || directive == replaceDirective || directive == copyDirective }