How to decode an RFC 2047 encoded email header in Ruby?

问题

I have the following header:

From: =?iso-8859-1?Q?Marta_Falc=E3o?= <marta.falcao@example.com.br>

I can easily split out the stuff before the <, which leaves me with

"=?iso-8859-1?Q?Marta_Falc=E3o?="

What can I use to turn this into "Marta Falcão"?

回答1:

Using the newer Mail gem:

Mail::Encodings.value_decode(str) or Mail::Encodings.unquote_and_convert_to(str, to_encoding)

回答2:

Thanks to Roland Illig for his comment, which led me to two options:

1. install rfc2047-ruby and call Rfc2047.decode(header)
2. install TMail and call TMail::Unquoter.unquote_and_convert_to(header, 'utf-8') or better yet TMail::Address.parse(header).friendly, the latter of which strips out the <email address> part

来源：https://stackoverflow.com/questions/7488875/how-to-decode-an-rfc-2047-encoded-email-header-in-ruby