@Override
    public InputStream loadData(Priority priority) throws Exception {
        return loadDataWithRedirects(glideUrl.toURL(), 0 /*redirects*/, null /*lastUrl*/, glideUrl.getHeaders());
    }
A DataFetcher that retrieves an {@link InputStream} for a Url.
core/src/main/java/com/bumptech/glide/load/data/HttpUrlFetcher.java