错误为 "illegal/malformed utf-8"的 Ruby to_json 问题

Question

我在尝试将散列转换为 json 字符串时遇到错误 JSON::GeneratorError: source sequence is illegal/malformed utf-8。我想知道这是否与编码有关，我怎样才能让 to_json 只按原样对待\xAE？

$ irb
2.0.0-p247 :001 > require 'json'
=> true
2.0.0-p247 :002 > a = {"description"=> "iPhone\xAE"}
=> {"description"=>"iPhone\xAE"}
2.0.0-p247 :003 > a.to_json
JSON::GeneratorError: source sequence is illegal/malformed utf-8
  from (irb):3:in `to_json'
  from (irb):3
  from /Users/cchen21/.rvm/rubies/ruby-2.0.0-p247/bin/irb:16:in `<main>'

Answer 1

\xAE 不是 UTF-8 中的有效字符，您必须改用 \u00AE:

"iPhone\u00AE"
#=> "iPhone®"

或者进行相应的转换:

"iPhone\xAE".force_encoding("ISO-8859-1").encode("UTF-8")
#=> "iPhone®"