// LOCKS_EXCLUDED(b.mu)
func (b *bucket) UpdateObject(
ctx context.Context,
req *gcs.UpdateObjectRequest) (o *gcs.Object, err error) {
b.mu.Lock()
defer b.mu.Unlock()
// Match real GCS in not allowing the removal of ContentType.
if req.ContentType != nil && *req.ContentType == "" {
err = errors.New("The ContentType field is required and cannot be removed.")
return
}
// Does the object exist?
index := b.objects.find(req.Name)
if index == len(b.objects) {
err = &gcs.NotFoundError{
Err: fmt.Errorf("Object %s not found", req.Name),
}
return
}
var obj *gcs.Object = &b.objects[index].metadata
// Update the entry's basic fields according to the request.
if req.ContentType != nil {
obj.ContentType = *req.ContentType
}
if req.ContentEncoding != nil {
obj.ContentEncoding = *req.ContentEncoding
}
if req.ContentLanguage != nil {
obj.ContentLanguage = *req.ContentLanguage
}
if req.CacheControl != nil {
obj.CacheControl = *req.CacheControl
}
// Update the user metadata if necessary.
if len(req.Metadata) > 0 {
if obj.Metadata == nil {
obj.Metadata = make(map[string]string)
}
for k, v := range req.Metadata {
if v == nil {
delete(obj.Metadata, k)
continue
}
obj.Metadata[k] = *v
}
}
// Bump up the entry generation number.
obj.MetaGeneration++
// Make a copy to avoid handing back internal state.
var objCopy gcs.Object = *obj
o = &objCopy
return
}
// LOCKS_EXCLUDED(b.mu)
func (b *bucket) UpdateObject(
ctx context.Context,
req *gcs.UpdateObjectRequest) (o *gcs.Object, err error) {
b.mu.Lock()
defer b.mu.Unlock()
// Does the object exist?
index := b.objects.find(req.Name)
if index == len(b.objects) {
err = &gcs.NotFoundError{
Err: fmt.Errorf("Object %s not found", req.Name),
}
return
}
var obj *gcs.Object = &b.objects[index].metadata
// Does the generation number match the request?
if req.Generation != 0 && obj.Generation != req.Generation {
err = &gcs.NotFoundError{
Err: fmt.Errorf(
"Object %q generation %d not found",
req.Name,
req.Generation),
}
return
}
// Does the meta-generation precondition check out?
if req.MetaGenerationPrecondition != nil &&
obj.MetaGeneration != *req.MetaGenerationPrecondition {
err = &gcs.PreconditionError{
Err: fmt.Errorf(
"Object %q has meta-generation %d",
obj.Name,
obj.MetaGeneration),
}
return
}
// Update the entry's basic fields according to the request.
if req.ContentType != nil {
obj.ContentType = *req.ContentType
}
if req.ContentEncoding != nil {
obj.ContentEncoding = *req.ContentEncoding
}
if req.ContentLanguage != nil {
obj.ContentLanguage = *req.ContentLanguage
}
if req.CacheControl != nil {
obj.CacheControl = *req.CacheControl
}
// Update the user metadata if necessary.
if len(req.Metadata) > 0 {
if obj.Metadata == nil {
obj.Metadata = make(map[string]string)
}
for k, v := range req.Metadata {
if v == nil {
delete(obj.Metadata, k)
continue
}
obj.Metadata[k] = *v
}
}
// Bump up the entry generation number and the update time.
obj.MetaGeneration++
obj.Updated = b.clock.Now()
// Make a copy to avoid handing back internal state.
var objCopy gcs.Object = *obj
o = &objCopy
return
}