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
|
# frozen_string_literal: true
module Rack
# Rack::MediaType parse media type and parameters out of content_type string
class MediaType
SPLIT_PATTERN = /[;,]/
class << self
# The media type (type/subtype) portion of the CONTENT_TYPE header
# without any media type parameters. e.g., when CONTENT_TYPE is
# "text/plain;charset=utf-8", the media-type is "text/plain".
#
# For more information on the use of media types in HTTP, see:
# http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.7
def type(content_type)
return nil unless content_type && !content_type.empty?
type = content_type.split(SPLIT_PATTERN, 2).first
type.rstrip!
type.downcase!
type
end
# The media type parameters provided in CONTENT_TYPE as a Hash, or
# an empty Hash if no CONTENT_TYPE or media-type parameters were
# provided. e.g., when the CONTENT_TYPE is "text/plain;charset=utf-8",
# this method responds with the following Hash:
# { 'charset' => 'utf-8' }
#
# This will pass back parameters with empty strings in the hash if they
# lack a value (e.g., "text/plain;charset=" will return { 'charset' => '' },
# and "text/plain;charset" will return { 'charset' => '' }, similarly to
# the query params parser (barring the latter case, which returns nil instead)).
def params(content_type)
return {} if content_type.nil? || content_type.empty?
content_type.split(SPLIT_PATTERN)[1..-1].each_with_object({}) do |s, hsh|
s.strip!
k, v = s.split('=', 2)
k.downcase!
hsh[k] = strip_doublequotes(v)
end
end
private
def strip_doublequotes(str)
(str && str.start_with?('"') && str.end_with?('"')) ? str[1..-2] : str || ''
end
end
end
end
|
