// deleteACLRule deleted the "allUsers" ACL rule for the named file.
func (d *demo) deleteACLRule(fileName string) {
fmt.Fprintf(d.w, "\nDelete ACL rule for file %v:\n", fileName)
err := storage.DeleteACLRule(d.ctx, d.bucket, fileName, "allUsers")
if err != nil {
d.errorf("deleteACLRule: unable to delete ACL rule for bucket %q, file %q: %v", d.bucket, fileName, err)
return
}
d.dumpACL(fileName)
}
// Delete removes an object by name from the bucket being used. If the object does not
// exist and there is nothing to delete, Delete returns with no error.
// TODO Delete thumbnail and web view copies too!
func Delete(filename string, r *http.Request) error {
c := appengine.NewContext(r)
bucket, err := file.DefaultBucketName(c)
if err != nil {
log.Errorf(c, "Failed to get default bucket: %v", err)
return err
}
ctx, err := auth(r)
if err != nil {
log.Errorf(c, "Failed to get context: %v", err)
return err
}
log.Infof(c, "Attempting to delete file %v from bucket %v.", filename, bucket)
// StatObject is used here to check existence before calling DeleteObject.
// If the object does not exist, DeleteObject returns an error that is NOT
// ErrObjectNotExist, so it seemed more reliable to check with StatObject first...
_, err = storage.StatObject(ctx, bucket, filename)
if err == storage.ErrObjectNotExist {
log.Warningf(c, "Object does not exist, nothing to delete.")
return nil
}
err = storage.DeleteObject(ctx, bucket, filename)
if err != nil {
log.Errorf(c, "Failed to delete file.")
log.Infof(c, "Attempting to remove public access to file...")
aclErr := storage.DeleteACLRule(ctx, bucket, filename, storage.AllUsers)
if aclErr != nil {
log.Errorf(c, "Failed to remove public file access!")
} else {
log.Infof(c, "File access removed.")
}
return err
}
return nil
}