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
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
|
require 'active_support/core_ext/module/attribute_accessors'
module ActionDispatch
module Http
module MimeNegotiation
extend ActiveSupport::Concern
included do
mattr_accessor :ignore_accept_header
self.ignore_accept_header = false
end
attr_reader :variant
# The MIME type of the HTTP request, such as Mime::XML.
#
# For backward compatibility, the post \format is extracted from the
# X-Post-Data-Format HTTP header if present.
def content_mime_type
@env["action_dispatch.request.content_type"] ||= begin
if @env['CONTENT_TYPE'] =~ /^([^,\;]*)/
Mime::Type.lookup($1.strip.downcase)
else
nil
end
end
end
def content_type
content_mime_type && content_mime_type.to_s
end
# Returns the accepted MIME type for the request.
def accepts
@env["action_dispatch.request.accepts"] ||= begin
header = @env['HTTP_ACCEPT'].to_s.strip
if header.empty?
[content_mime_type]
else
Mime::Type.parse(header)
end
end
end
# Returns the MIME type for the \format used in the request.
#
# GET /posts/5.xml | request.format => Mime::XML
# GET /posts/5.xhtml | request.format => Mime::HTML
# GET /posts/5 | request.format => Mime::HTML or MIME::JS, or request.accepts.first
#
def format(view_path = [])
formats.first
end
def formats
@env["action_dispatch.request.formats"] ||=
if parameters[:format]
Array(Mime[parameters[:format]])
elsif use_accept_header && valid_accept_header
accepts
elsif xhr?
[Mime::JS]
else
[Mime::HTML]
end
end
# Sets the \variant for template.
def variant=(variant)
if variant.is_a? Symbol
@variant = variant
else
raise ArgumentError, "request.variant must be set to a Symbol, not a #{variant.class}. " \
"For security reasons, never directly set the variant to a user-provided value, " \
"like params[:variant].to_sym. Check user-provided value against a whitelist first, " \
"then set the variant: request.variant = :tablet if params[:variant] == 'tablet'"
end
end
# Sets the \format by string extension, which can be used to force custom formats
# that are not controlled by the extension.
#
# class ApplicationController < ActionController::Base
# before_action :adjust_format_for_iphone
#
# private
# def adjust_format_for_iphone
# request.format = :iphone if request.env["HTTP_USER_AGENT"][/iPhone/]
# end
# end
def format=(extension)
parameters[:format] = extension.to_s
@env["action_dispatch.request.formats"] = [Mime::Type.lookup_by_extension(parameters[:format])]
end
# Sets the \formats by string extensions. This differs from #format= by allowing you
# to set multiple, ordered formats, which is useful when you want to have a fallback.
#
# In this example, the :iphone format will be used if it's available, otherwise it'll fallback
# to the :html format.
#
# class ApplicationController < ActionController::Base
# before_action :adjust_format_for_iphone_with_html_fallback
#
# private
# def adjust_format_for_iphone_with_html_fallback
# request.formats = [ :iphone, :html ] if request.env["HTTP_USER_AGENT"][/iPhone/]
# end
# end
def formats=(extensions)
parameters[:format] = extensions.first.to_s
@env["action_dispatch.request.formats"] = extensions.collect do |extension|
Mime::Type.lookup_by_extension(extension)
end
end
# Receives an array of mimes and return the first user sent mime that
# matches the order array.
#
def negotiate_mime(order)
formats.each do |priority|
if priority == Mime::ALL
return order.first
elsif order.include?(priority)
return priority
end
end
order.include?(Mime::ALL) ? formats.first : nil
end
protected
BROWSER_LIKE_ACCEPTS = /,\s*\*\/\*|\*\/\*\s*,/
def valid_accept_header
(xhr? && (accept.present? || content_mime_type)) ||
(accept.present? && accept !~ BROWSER_LIKE_ACCEPTS)
end
def use_accept_header
!self.class.ignore_accept_header
end
end
end
end
|
