Question

我有一个输入字符串，认为是UTF-8，但不是，需要修复它。代码在ruby 2中，因此iconv不再存在，并且encode或force_encode没有按预期工作：

[5] pry(main)> a='zg\u0142oszeniem'
=> "zg\\u0142oszeniem"
[6] pry(main)> a.encode("UTF-8", :invalid => :replace, :undef => :replace, :replace => "?")
=> "zg\\u0142oszeniem"
[8] pry(main)> a.encode!(Encoding::UTF_8, :invalid => :replace, :undef => :replace, :replace => "?")
=> "zg\\u0142oszeniem"
[10] pry(main)> a.force_encoding(Encoding::UTF_8)
=> "zg\\u0142oszeniem"

我该如何解决？

Answer 1

这是使用正则表达式的解决方案：

a.gsub(/\\u([0-9a-fA-F]{1,5}|10[0-9a-fA-F]{4})/) { $1.hex.chr(Encoding::UTF_8) } ¹

它应该适用于该特定字符串：

[1] pry(main)> before = 'zg\u0142oszeniem'
=> "zg\\u0142oszeniem"
[2] pry(main)> before.split('')
=> ["z", "g", "\\", "u", "0", "1", "4", "2", "o", "s", "z", "e", "n", "i", "e", "m"]
[3] pry(main)> after = before.gsub(/\\u([0-9a-fA-F]{1,5}|10[0-9a-fA-F]{4})/) { $1.hex.chr(Encoding::UTF_8) }
=> "zgłoszeniem"
[4] pry(main)> after.split('')
=> ["z", "g", "ł", "o", "s", "z", "e", "n", "i", "e", "m"]

[1] Unicode代码点的范围可以是0到10FFFF ₁₆（definition D9 in Section 3.4, Characters and Encoding），这应该解释为什么上面的正则表达式看起来像这样。

如何在ruby 2中修复损坏的UTF-8字符串

1 个答案: