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
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
|
require 'active_support/core_ext/string/starts_ends_with'
module ActiveSupport
module JSON
class ParseError < StandardError
end
class << self
# Converts a JSON string into a Ruby object.
def decode(json)
YAML.load(convert_json_to_yaml(json))
rescue ArgumentError => e
raise ParseError, "Invalid JSON string"
end
protected
# matches YAML-formatted dates
DATE_REGEX = /^(?:\d{4}-\d{2}-\d{2}|\d{4}-\d{1,2}-\d{1,2}[ \t]+\d{1,2}:\d{2}:\d{2}(\.[0-9]*)?(([ \t]*)Z|[-+]\d{2}?(:\d{2})?)?)$/
# Ensure that ":" and "," are always followed by a space
def convert_json_to_yaml(json) #:nodoc:
require 'strscan' unless defined? ::StringScanner
scanner, quoting, marks, pos, times = ::StringScanner.new(json), false, [], nil, []
while scanner.scan_until(/(\\['"]|['":,\\]|\\.)/)
case char = scanner[1]
when '"', "'"
if !quoting
quoting = char
pos = scanner.pos
elsif quoting == char
if json[pos..scanner.pos-2] =~ DATE_REGEX
# found a date, track the exact positions of the quotes so we can remove them later.
# oh, and increment them for each current mark, each one is an extra padded space that bumps
# the position in the final YAML output
total_marks = marks.size
times << pos+total_marks << scanner.pos+total_marks
end
quoting = false
end
when ":",","
marks << scanner.pos - 1 unless quoting
end
end
if marks.empty?
json.gsub(/\\([\\\/]|u[[:xdigit:]]{4})/) do
ustr = $1
if ustr.start_with?('u')
[ustr[1..-1].to_i(16)].pack("U")
elsif ustr == '\\'
'\\\\'
else
ustr
end
end
else
left_pos = [-1].push(*marks)
right_pos = marks << scanner.pos + scanner.rest_size
output = []
left_pos.each_with_index do |left, i|
scanner.pos = left.succ
output << scanner.peek(right_pos[i] - scanner.pos + 1).gsub(/\\([\\\/]|u[[:xdigit:]]{4})/) do
ustr = $1
if ustr.start_with?('u')
[ustr[1..-1].to_i(16)].pack("U")
elsif ustr == '\\'
'\\\\'
else
ustr
end
end
end
output = output * " "
times.each { |i| output[i-1] = ' ' }
output.gsub!(/\\\//, '/')
output
end
end
end
end
end
|
