雷神YAML输出为二进制? [英] Thor & YAML outputting as binary?

问题描述

我正在使用Thor，并尝试将YAML输出到文件.在irb中，我得到了期望. YAML格式的纯文本.但是当Thor中的方法的一部分时，其输出是不同的...

I'm using Thor and trying to output YAML to a file. In irb I get what I expect. Plain text in YAML format. But when part of a method in Thor, its output is different...

class Foo < Thor
  include Thor::Actions

  desc "bar", "test"
  def set
    test = {"name" => "Xavier", "age" => 30}
    puts test
    # {"name"=>"Xavier", "age"=>30}
    puts test.to_yaml
    # !binary "bmFtZQ==": !binary |-
    #   WGF2aWVy
    # !binary "YWdl": 30
    File.open("data/config.yml", "w") {|f| f.write(test.to_yaml) }
  end
end

有什么想法吗?

推荐答案

所有Ruby 1.9字符串均附有编码.

All Ruby 1.9 strings have an encoding attached to them.

YAML将一些非UTF8字符串编码为二进制，即使它们看起来很纯真，也没有任何高位字符.您可能会认为您的代码始终使用UTF8，但是内置函数可以返回非UTF8字符串(例如，文件路径例程).

YAML encodes some non-UTF8 strings as binary, even when they look innocent, without any high-bit characters. You might think that your code is always using UTF8, but builtins can return non-UTF8 strings (ex File path routines).

为避免二进制编码，请在调用to_yaml之前确保所有字符串编码均为UTF-8.使用force_encoding("UTF-8")方法更改编码.

To avoid binary encoding, make sure all your strings encodings are UTF-8 before calling to_yaml. Change the encoding with force_encoding("UTF-8") method.

例如，这就是我将选项哈希编码为yaml的方式:

For example, this is how I encode my options hash into yaml:

options = {
    :port => 26000,
    :rackup => File.expand_path(File.join(File.dirname(__FILE__), "../sveg.rb"))
}
utf8_options = {}
options.each_pair { |k,v| utf8_options[k] = ((v.is_a? String) ? v.force_encoding("UTF-8") : v)}
puts utf8_options.to_yaml

以下是yaml将简单字符串编码为二进制的示例

Here is an example of yaml encoding simple strings as binary

>> x = "test"
=> "test"
>> x.encoding
=> #<Encoding:UTF-8>
>> x.to_yaml
=> "--- test\n...\n"
>> x.force_encoding "ASCII-8BIT"
=> "test"
>> x.to_yaml
=> "--- !binary |-\n  dGVzdA==\n"

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