package handler import ( "net/http" "net/url" "strings" "time" "github.com/nspcc-dev/neofs-s3-gw/api" "github.com/nspcc-dev/neofs-s3-gw/api/data" "github.com/nspcc-dev/neofs-s3-gw/api/errors" "github.com/nspcc-dev/neofs-s3-gw/api/layer" "go.uber.org/zap" ) type copyObjectArgs struct { Conditional *conditionalArgs MetadataDirective string } const replaceMetadataDirective = "REPLACE" // path2BucketObject returns bucket and object. func path2BucketObject(path string) (bucket, prefix string) { path = strings.TrimPrefix(path, api.SlashSeparator) m := strings.Index(path, api.SlashSeparator) if m < 0 { return path, "" } return path[:m], path[m+len(api.SlashSeparator):] } func (h *handler) CopyObjectHandler(w http.ResponseWriter, r *http.Request) { var ( err error info *data.ObjectInfo metadata map[string]string reqInfo = api.GetReqInfo(r.Context()) versionID string ) src := r.Header.Get("X-Amz-Copy-Source") // 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 := path2BucketObject(src) args, err := parseCopyObjectArgs(r.Header) if err != nil { h.logAndSendError(w, "could not parse request params", reqInfo, err) return } p := &layer.HeadObjectParams{ Bucket: srcBucket, Object: srcObject, VersionID: versionID, } if args.MetadataDirective == replaceMetadataDirective { metadata = parseMetadata(r) } else if srcBucket == reqInfo.BucketName && srcObject == reqInfo.ObjectName { h.logAndSendError(w, "could not copy to itself", reqInfo, errors.GetAPIError(errors.ErrInvalidRequest)) return } if err = h.checkBucketOwner(r, srcBucket, r.Header.Get(api.AmzSourceExpectedBucketOwner)); err != nil { h.logAndSendError(w, "source expected owner doesn't match", reqInfo, err) return } if err = h.checkBucketOwner(r, reqInfo.BucketName); err != nil { h.logAndSendError(w, "expected owner doesn't match", reqInfo, err) return } if info, err = h.obj.GetObjectInfo(r.Context(), p); err != nil { h.logAndSendError(w, "could not find object", reqInfo, err) return } if err = checkPreconditions(info, args.Conditional); err != nil { h.logAndSendError(w, "precondition failed", reqInfo, errors.GetAPIError(errors.ErrPreconditionFailed)) return } if metadata == nil { if len(info.ContentType) > 0 { info.Headers[api.ContentType] = info.ContentType } metadata = info.Headers } else if contentType := r.Header.Get(api.ContentType); len(contentType) > 0 { metadata[api.ContentType] = contentType } params := &layer.CopyObjectParams{ SrcObject: info, DstBucket: reqInfo.BucketName, DstObject: reqInfo.ObjectName, SrcSize: info.Size, Header: metadata, } bktInfo, err := h.obj.GetBucketInfo(r.Context(), reqInfo.BucketName) if err != nil { h.logAndSendError(w, "could not get bucket", reqInfo, err) return } settings, err := h.obj.GetBucketSettings(r.Context(), bktInfo) if err != nil { h.logAndSendError(w, "could not get bucket settings", reqInfo, err) return } if err = formObjectLock(params.Lock, bktInfo, settings.LockConfiguration, r.Header); 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)} if info, err = h.obj.CopyObject(r.Context(), params); err != nil { h.logAndSendError(w, "couldn't copy object", reqInfo, err, additional...) return } else if err = api.EncodeToResponse(w, &CopyObjectResponse{LastModified: info.Created.UTC().Format(time.RFC3339), ETag: info.HashSum}); err != nil { h.logAndSendError(w, "something went wrong", reqInfo, err, additional...) return } h.log.Info("object is copied", zap.String("bucket", info.Bucket), zap.String("object", info.Name), zap.Stringer("object_id", info.ID)) } 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) return copyArgs, nil }