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rack-1.6.4
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files >> //opt/alt/ruby21/lib64/ruby/gems/2.1.0/gems/rack-1.6.4/lib/rack/response.rb
require 'rack/request' require 'rack/utils' require 'rack/body_proxy' require 'time' 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 synchronous with the Rack response. # # Your application's +call+ should end returning Response#finish. class Response attr_accessor :length CHUNKED = 'chunked'.freeze TRANSFER_ENCODING = 'Transfer-Encoding'.freeze def initialize(body=[], status=200, header={}) @status = status.to_i @header = Utils::HeaderHash.new.merge(header) @chunked = CHUNKED == @header[TRANSFER_ENCODING] @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) Utils.set_cookie_header!(header, key, value) end def delete_cookie(key, value={}) Utils.delete_cookie_header!(header, key, value) end def redirect(target, status=302) self.status = status self["Location"] = target end def finish(&block) @block = block if [204, 205, 304].include?(status.to_i) header.delete CONTENT_TYPE header.delete CONTENT_LENGTH close [status.to_i, header, []] else [status.to_i, header, BodyProxy.new(self){}] end end alias to_a finish # For *response alias to_ary finish # For implicit-splat on Ruby 1.9.2 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) unless @chunked @writer.call s header[CONTENT_LENGTH] = @length.to_s unless @chunked 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 created?; status == 201; end def accepted?; status == 202; end def bad_request?; status == 400; end def unauthorized?; status == 401; end def forbidden?; status == 403; end def not_found?; status == 404; end def method_not_allowed?; status == 405; end def i_m_a_teapot?; status == 418; end def unprocessable?; status == 422; end def redirect?; [301, 302, 303, 307].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
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