Ruby 2.3编写UTF-16LE gzip文件

时间:2017-02-09 12:14:21

标签: ruby file encoding utf-16 ruby-2.3

我有这个代码,运行Ruby 2.3.1:

str = "麦克风访问被拒绝"
puts str.encoding #=> "UTF-8"

conv = Encoding::Converter.new("UTF-8", "UTF-16LE")
str = conv.convert(str)
puts str.encoding #=> "UTF-16LE"

Zlib::GzipWriter.open("test.gz", encoding: "UTF-16LE") do |gz|
  puts str.encoding #=> "UTF-16LE"
  gz.write(str)
end

Zlib::GzipReader.open("test.gz") do |gz|
  puts gz.read.encoding #=> ASCII-8BIT
  gz.read
end

并返回[无效编码]

如何以保持编码为UTF-16LE的方式保存文件?

1 个答案:

答案 0 :(得分:3)

就我而言(并由文档确认),您无法向.open - 函数发送选项哈希值。您必须先使用Zlib::GzipWriter.new(io, level = nil, strategy = nil, options = {})创建对象,如Docs中所述。

require 'zlib'

str = "麦克风访问被拒绝"

conv = Encoding::Converter.new("UTF-8", "UTF-16LE")
str = conv.convert(str)
p str

File.open('test.gz', 'w') do |f|
  gz = Zlib::GzipWriter.new(f, nil, nil, encoding: 'UTF-16LE' )
  gz.write str
  gz.close
end

File.open('test.gz') do |f|
  gz = Zlib::GzipReader.new(f, { encoding: 'UTF-16LE' })
  p gz.read
  gz.close
end

此代码输出:

\u9EA6\u514B\u98CE\u8BBF\u95EE\u88AB\u62D2\u7EDD

\u9EA6\u514B\u98CE\u8BBF\u95EE\u88AB\u62D2\u7EDD

(更新 - 修复整个示例,正常工作)