> +/**
> + * Converts ETag header values to byte arrays.
> + *
> + * @author Francis Devereux
> + */
> +public class ETagUtils {
> + public static byte[] convertETagToHash(String eTag) {
> + eTag = unquote(eTag);
> + return base16().lowerCase().decode(eTag);
> + }
> +
> + static String unquote(String eTag) {
> + if (eTag.length() >= 2 &&
> + eTag.startsWith("\"") && eTag.endsWith("\"")) {
> + eTag = eTag.substring(1, eTag.length() - 1);
> + }
I don't think it could be done elegantly with a Splitter. I considered using a
regex but thought it would be less clear (and probably slower, although not
significantly).
The `length() >= 2` check was suggested by @andrewgaul. A single `"` is not a
valid input as I alluded to in
https://github.com/jclouds/jclouds/pull/120#discussion_r5902842.
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