frostfs-s3-gw/api/handler/copy.go

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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/layer"
"go.uber.org/zap"
)
type copyObjectArgs struct {
Conditional *conditionalArgs
}
// 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
inf *layer.ObjectInfo
reqInfo = api.GetReqInfo(r.Context())
)
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 {
// Check if versionId query param was added, if yes then check if
// its non "null" value, we should error out since we do not support
// any versions other than "null".
if vid := u.Query().Get("versionId"); vid != "" && vid != "null" {
h.logAndSendError(w, "no such version", reqInfo, api.GetAPIError(api.ErrNoSuchVersion))
return
}
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
}
if inf, err = h.obj.GetObjectInfo(r.Context(), srcBucket, srcObject); err != nil {
h.logAndSendError(w, "could not find object", reqInfo, err)
return
}
if err = checkPreconditions(inf, args.Conditional); err != nil {
h.logAndSendError(w, "precondition failed", reqInfo, api.GetAPIError(api.ErrPreconditionFailed))
return
}
params := &layer.CopyObjectParams{
SrcBucket: srcBucket,
DstBucket: reqInfo.BucketName,
SrcObject: srcObject,
DstObject: reqInfo.ObjectName,
SrcSize: inf.Size,
Header: inf.Headers,
}
if inf, err = h.obj.CopyObject(r.Context(), params); err != nil {
writeErrorCopy(w, reqInfo, h.log, "could not copy object", srcBucket, srcObject, err)
return
} else if err = api.EncodeToResponse(w, &CopyObjectResponse{LastModified: inf.Created.Format(time.RFC3339), ETag: inf.HashSum}); err != nil {
writeErrorCopy(w, reqInfo, h.log, "something went wrong", srcBucket, srcObject, err)
return
}
h.log.Info("object is copied",
zap.String("bucket", inf.Bucket),
zap.String("object", inf.Name),
zap.Stringer("object_id", inf.ID()))
}
func writeErrorCopy(w http.ResponseWriter, reqInfo *api.ReqInfo, log *zap.Logger, msg, srcBucket, srcObject string, err error) {
log.Error(msg,
zap.String("request_id", reqInfo.RequestID),
zap.String("dst_bucket_name", reqInfo.BucketName),
zap.String("dst_object_name", reqInfo.ObjectName),
zap.String("src_bucket_name", srcBucket),
zap.String("src_object_name", srcObject),
zap.Error(err))
api.WriteErrorResponse(w, reqInfo, err)
}
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
}
return &copyObjectArgs{Conditional: args}, nil
}