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
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
|
require 'rack/request'
require 'rack/utils'
module Rack
# Rack::Response provides a convenient interface to create a Rack
# response.
#
# It allows setting of headers and cookies, and provides useful
# defaults (a OK response containing HTML).
#
# You can use Response#write to iteratively generate your response,
# but note that this is buffered by Rack::Response until you call
# +finish+. +finish+ however can take a block inside which calls to
# +write+ are syncronous with the Rack response.
#
# Your application's +call+ should end returning Response#finish.
class Response
attr_accessor :length
def initialize(body=[], status=200, header={}, &block)
@status = status
@header = Utils::HeaderHash.new({"Content-Type" => "text/html"}.
merge(header))
@writer = lambda { |x| @body << x }
@block = nil
@length = 0
@body = []
if body.respond_to? :to_str
write body.to_str
elsif body.respond_to?(:each)
body.each { |part|
write part.to_s
}
else
raise TypeError, "stringable or iterable required"
end
yield self if block_given?
end
attr_reader :header
attr_accessor :status, :body
def [](key)
header[key]
end
def []=(key, value)
header[key] = value
end
def set_cookie(key, value)
case value
when Hash
domain = "; domain=" + value[:domain] if value[:domain]
path = "; path=" + value[:path] if value[:path]
# According to RFC 2109, we need dashes here.
# N.B.: cgi.rb uses spaces...
expires = "; expires=" + value[:expires].clone.gmtime.
strftime("%a, %d-%b-%Y %H:%M:%S GMT") if value[:expires]
secure = "; secure" if value[:secure]
httponly = "; HttpOnly" if value[:httponly]
value = value[:value]
end
value = [value] unless Array === value
cookie = Utils.escape(key) + "=" +
value.map { |v| Utils.escape v }.join("&") +
"#{domain}#{path}#{expires}#{secure}#{httponly}"
case self["Set-Cookie"]
when Array
self["Set-Cookie"] << cookie
when String
self["Set-Cookie"] = [self["Set-Cookie"], cookie]
when nil
self["Set-Cookie"] = cookie
end
end
def delete_cookie(key, value={})
unless Array === self["Set-Cookie"]
self["Set-Cookie"] = [self["Set-Cookie"]].compact
end
self["Set-Cookie"].reject! { |cookie|
cookie =~ /\A#{Utils.escape(key)}=/
}
set_cookie(key,
{:value => '', :path => nil, :domain => nil,
:expires => Time.at(0) }.merge(value))
end
def redirect(target, status=302)
self.status = status
self["Location"] = target
end
def finish(&block)
@block = block
if [204, 304].include?(status.to_i)
header.delete "Content-Type"
[status.to_i, header.to_hash, []]
else
[status.to_i, header.to_hash, self]
end
end
alias to_a finish # For *response
def each(&callback)
@body.each(&callback)
@writer = callback
@block.call(self) if @block
end
# Append to body and update Content-Length.
#
# NOTE: Do not mix #write and direct #body access!
#
def write(str)
s = str.to_s
@length += Rack::Utils.bytesize(s)
@writer.call s
header["Content-Length"] = @length.to_s
str
end
def close
body.close if body.respond_to?(:close)
end
def empty?
@block == nil && @body.empty?
end
alias headers header
module Helpers
def invalid?; @status < 100 || @status >= 600; end
def informational?; @status >= 100 && @status < 200; end
def successful?; @status >= 200 && @status < 300; end
def redirection?; @status >= 300 && @status < 400; end
def client_error?; @status >= 400 && @status < 500; end
def server_error?; @status >= 500 && @status < 600; end
def ok?; @status == 200; end
def forbidden?; @status == 403; end
def not_found?; @status == 404; end
def redirect?; [301, 302, 303, 307].include? @status; end
def empty?; [201, 204, 304].include? @status; end
# Headers
attr_reader :headers, :original_headers
def include?(header)
!!headers[header]
end
def content_type
headers["Content-Type"]
end
def content_length
cl = headers["Content-Length"]
cl ? cl.to_i : cl
end
def location
headers["Location"]
end
end
include Helpers
end
end
|
