discourse/lib/encodings.rb

33 lines
902 B
Ruby

# frozen_string_literal: true
require "rchardet"
module Encodings
def self.to_utf8(string)
result = CharDet.detect(string)
encoded_string = try_utf8(string, result["encoding"]) if result && result["encoding"]
encoded_string = force_utf8(string) if encoded_string.nil?
encoded_string
end
def self.try_utf8(string, source_encoding)
encoded = string.encode(Encoding::UTF_8, source_encoding)
encoded&.valid_encoding? ? delete_bom!(encoded) : nil
rescue Encoding::InvalidByteSequenceError,
Encoding::UndefinedConversionError,
Encoding::ConverterNotFoundError
nil
end
def self.force_utf8(string)
encoded_string = string.encode(Encoding::UTF_8, undef: :replace, invalid: :replace, replace: "")
delete_bom!(encoded_string)
end
def self.delete_bom!(string)
string.sub!(/\A\xEF\xBB\xBF/, "") if string.present?
string
end
end