diff --git a/registry/client/repository.go b/registry/client/repository.go index 87067b99..b3cae847 100644 --- a/registry/client/repository.go +++ b/registry/client/repository.go @@ -36,8 +36,21 @@ func checkHTTPRedirect(req *http.Request, via []*http.Request) error { if len(via) > 0 { for headerName, headerVals := range via[0].Header { - if headerName == "Accept" || headerName == "Range" { - for _, val := range headerVals { + if headerName != "Accept" && headerName != "Range" { + continue + } + for _, val := range headerVals { + // Don't add to redirected request if redirected + // request already has a header with the same + // name and value. + hasValue := false + for _, existingVal := range req.Header[headerName] { + if existingVal == val { + hasValue = true + break + } + } + if !hasValue { req.Header.Add(headerName, val) } }