remotes/docker: allow 404 for POST /v2/token
@@ -491,8 +491,9 @@ func (r *dockerBase) fetchTokenWithOAuth(ctx context.Context, to tokenOptions) (
}
defer resp.Body.Close()
- if resp.StatusCode == 405 && r.username != "" {
- // It would be nice if registries would implement the specifications
+ // Registries without support for POST may return 404 for POST /v2/token.
+ // As of September 2017, GCR is known to return 404.
+ if (resp.StatusCode == 405 && r.username != "") || resp.StatusCode == 404 {
return r.getToken(ctx, to)
} else if resp.StatusCode < 200 || resp.StatusCode >= 400 {
b, _ := ioutil.ReadAll(resp.Body)
