Ruby 2.3 写入 UTF-16LE gzip 文件

Question

>我有这段代码，运行在 Ruby 2.3.1 中：

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]

如何以将编码保留为 UTF-16LE 的方式保存文件？

Answer 1

就我而言(并由文档确认(，您无法将选项哈希发送到 .open -函数。您必须先使用 Zlib::GzipWriter.new(io, level = nil, strategy = nil, options = {}) 创建一个对象，如文档中所述。

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：

u9EA6u514Bu98CEu8BBFu95EEu88ABu62D2u7EDD
u9EA6u514Bu98CEu8BBFu95EEu88ABu62D2u7EDD

(更新 - 修复了整个示例，工作(