ruby mail gem - 在交付块中设置charset

Question

我正在使用mail gem使用此代码发送带有UTF-8内容的电子邮件

Mail.defaults do
    ...
end

Mail.deliver do
    from    "user@example.com"
    to      "otheruser@example.com"
    subject "Mäbülö..."
    body    "Märchenbücher lösen Leseschwächen."
end

这有效,但会发出警告

Non US-ASCII detected and no charset defined.
Defaulting to UTF-8, set your own if this is incorrect.

现在经过多次尝试,咨询邮件gem生成的文档以及源代码,我仍然无法设置charset.charset=Message.rb中有一个方法,但是当我添加对charset的调用时,如下所示:

Mail.deliver do
    from    "user@example.com"
    to      "otheruser@example.com"
    charset "UTF-8"
    subject "Mäbülö..."
    body    "Märchenbücher lösen Leseschwächen."
end

我得到这个ArgumentError:

/usr/local/lib/ruby/gems/1.9.1/gems/mail-2.4.4/lib/mail/message.rb:1423:in `charset': wrong number of arguments (1 for 0) (ArgumentError)

如何在交付块中设置字符集？

Answer 1

mail.charset() 返回当前字符集,它不允许设置一个并且不接受任何参数.

为此,您需要使用 mail.charset = ...

它实际上可能在块内:

Mail.deliver do
  from    "user@example.com"
  to      "otheruser@example.com"
  subject "Mäbülö..."
  body    "Märchenbücher lösen Leseschwächen."
  charset = "UTF-8"
end

没有块也可以:

mail         = Mail.new
mail.charset = 'UTF-8'
mail.content_transfer_encoding = '8bit'

mail.from    = ...
mail.to      = ...
mail.subject = ...

mail.text_part do
  body ...
end

mail.html_part do
  content_type 'text/html; charset=UTF-8'
  body ...
end

mail.deliver!