ruby - 在 Ruby 中为 RFC2822 时间强制使用 "+0000"时区

Question

如何强制 Time.rfc2822 函数吐出 +0000？

Ruby 让我解析 RFC2822格式化时间很容易:

require 'time'
time = Time.parse('14 Aug 2009 09:28:32 +0000')
puts time
=> "2009-08-14 05:28:32 -0400"

但是显示时间呢？请注意，它解析的时间是本地时间。不用担心，我可以使用 gmtime 将它转换回 UTC 时间:

puts time.gmtime
=> "2009-08-14 09:28:32 UTC"

然后我可以将其恢复为 RFC2822 格式:

puts time.gmtime.rfc2822
=> "Fri, 14 Aug 2009 09:28:32 -0000"

不幸的是，这不是我想要的。请注意，+0000 现在是 -0000。根据 RFC2822，这是因为:

The form "+0000" SHOULD be used to indicate a time zone at Universal Time. Though "-0000" also indicates Universal Time, it is used to indicate that the time was generated on a system that may be in a local time zone other than Universal Time and therefore indicates that the date-time contains no information about the local time zone.

太好了 - 那么除了对 rfc2822 函数进行猴子修补之外，我如何强制执行 +0000？

Answer 1

这是我的 monkeypatch 解决方案:

class Time
  alias_method :old_rfc2822, :rfc2822
  def rfc2822
    t = old_rfc2822
    t.gsub!("-0000", "+0000") if utc?
    t
  end
end

如果您有非 monkeypatch 解决方案，我很乐意看到它!