在通过Ruby Net:：IMAP收集邮件时，如何最好地编码或清理电子邮件正文

我正在从IMAP服务器收集电子邮件，下面有代码，但电子邮件正文的内容通常非常难看，有时甚至无法理解。许多电子邮件包含丹麦和瑞典的特殊字符，如æ、ä、ö、ø和å，但我认为这不是问题所在。如何最好地编码和清理

imap = Net::IMAP.new(address, port, enable_ssl?)
imap.login(user_name, password)
imap.examine(flag)

search_query = "#{last_uid}:*"

imap.uid_search(search_query).each do |uid|
  if uid.to_i > last_uid.to_i

    header = imap.uid_fetch(uid, "BODY[HEADER.FIELDS (FROM TO DATE SUBJECT)]")[0].attr["BODY[HEADER.FIELDS (FROM TO DATE SUBJECT)]"]
    from = Mail.read_from_string(header).from.first
    to = Mail.read_from_string(header).to.first rescue nil
    subject = Mail.read_from_string(header).subject
    date = Mail.read_from_string(header).date

    body = imap.uid_fetch(uid, "BODY[TEXT]")[0].attr["BODY[TEXT]"].gsub(/\r\n?/, "\n").force_encoding('UTF-8')

  end
end
imap.logout()
imap.disconnect()

样本正文内容：

1：

2（简称）：

3(简称):

---

等等，

为了解决这个问题，我花了好几个小时到处寻找答案，所以在我找到的一些线索中添加了我的答案

---

希望对某人有所帮助…

您需要使用MIME解码器。这些实体采用base64或引用的可打印编码，并且可能是多部分的，因此您需要为它们祈祷。

LS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS08YnI+DQpPcmRy
ZWRhdG86IDI4LTAzLTIwMTMgMTQ6NDc6MTg8YnI+DQpPcmRyZW51bW1lcjogMTA5MDM1PGJy
Pg0KVHJhbnNha3Rpb25zSUQ6IDE2NzgyMQ0KPGJyPjxicj4NCkZha3R1cmVyaW5nc2FkcmVz
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LS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLTxicj48YnI+DQpOaWtsYXMgSnV1bCBOaWVs
c2VuPGJyIC8+QS5QLiBNw7hsbGVyIEtvbGxlZ2lldCAxMDU8YnIgLz41NzAwIFN2ZW5kYm9y
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cmluZ3NhZHJlc3NlOjxicj4NCi0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0t
LS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS08YnI+PGJyPg0KTmlrbGFz
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LS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS08YnI+DQoNCiAgMSww
MCBzdGsuIFN0YXIgV2FycyBCYXR0bGVmcm9udCBJSSBYYm94ICg0MTAzMikgw6EgREtLIDI2
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REtLIDMzNCwxMg0KPGJyPg0KSGVyYWYgbW9tczogREtLIDY2LDgzDQo=

------=_NextPart_000_0482_01CE2B9E.A689A9F0
Content-Type: multipart/related;
    boundary="----=_NextPart_001_0483_01CE2B9E.A689A9F0"

------=_NextPart_001_0483_01CE2B9E.A689A9F0
Content-Type: multipart/alternative;
boundary="----=_NextPart_002_0484_01CE2B9E.A689A9F0"

------=_NextPart_002_0484_01CE2B9E.A689A9F0
Content-Type: text/plain; charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable

=20



            =09
    =09
    =09
=09
=20

=09

                    =09
                        =09
                        =09
                        =09
                        =09
                        =09
                        =09
                        =09

Daily Restock Information.

=09
=09

Item

Format

1+=20

 5+ =20

 Box Price=20

Qty

Barcode

=09

--Boundary-=_SHccxHuUYYhTGDGLfcIEBDUToEun
Content-Type: text/plain; charset="ISO-8859-1"


--Boundary-=_SHccxHuUYYhTGDGLfcIEBDUToEun
Content-Type: application/octet-stream
Content-Disposition: attachment; filename="SYSTEMSTOCK.XLSX"
Content-Transfer-Encoding: base64
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