Clear all Dtab-related headers from the given message.
Parse old-style X-Dtab pairs and then new-style Dtab-Local headers, Dtab-Local taking precedence.
Parse old-style X-Dtab pairs and then new-style Dtab-Local headers, Dtab-Local taking precedence.
a Try[Dtab] which keeps the created Dtab if reading in worked.
Write a Dtab-local header into the given message.
Dtab serialization for Http. Dtabs are encoded into Http headers with keys x-dtab-$idx-(a|b) where $idx is a two-digit integer. These headers are encoded in pairs: 'a' and 'b' headers must exist for each index. Thus when header names are lexically sorted, Dtab entries are decoded pairwise. 'a' denoting prefix, 'b' destination.
Header values are base64-encoded ("standard" alphabet) Utf8 strings.