1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
|
# encoding: utf-8
# frozen_string_literal: true
module Mail #:nodoc:
module Multibyte #:nodoc:
# Returns a regular expression that matches valid characters in the current encoding
def self.valid_character
VALID_CHARACTER[Encoding.default_external.to_s]
end
# Returns true if string has valid utf-8 encoding
def self.is_utf8?(string)
case string.encoding
when Encoding::UTF_8
verify(string)
when Encoding::ASCII_8BIT, Encoding::US_ASCII
verify(to_utf8(string))
else
false
end
end
# Verifies the encoding of a string
def self.verify(string)
string.valid_encoding?
end
# Verifies the encoding of the string and raises an exception when it's not valid
def self.verify!(string)
raise EncodingError.new("Found characters with invalid encoding") unless verify(string)
end
# Removes all invalid characters from the string.
#
# Note: this method is a no-op in Ruby 1.9
def self.clean(string)
string
end
def self.to_utf8(string)
string.dup.force_encoding(Encoding::UTF_8)
end
end
end
|
