142 lines
3.8 KiB
Ruby
142 lines
3.8 KiB
Ruby
module Mime
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class Type #:nodoc:
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# A simple helper class used in parsing the accept header
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class AcceptItem #:nodoc:
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attr_accessor :order, :name, :q
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def initialize(order, name, q=nil)
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@order = order
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@name = name.strip
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q ||= 0.0 if @name == "*/*" # default "*/*" to end of list
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@q = ((q || 1.0).to_f * 100).to_i
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end
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def to_s
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@name
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end
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def <=>(item)
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result = item.q <=> q
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result = order <=> item.order if result == 0
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result
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end
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def ==(item)
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name == (item.respond_to?(:name) ? item.name : item)
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end
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end
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class << self
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def lookup(string)
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LOOKUP[string]
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end
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def parse(accept_header)
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# keep track of creation order to keep the subsequent sort stable
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index = 0
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list = accept_header.split(/,/).
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map! { |i| AcceptItem.new(index += 1, *i.split(/;\s*q=/)) }.sort!
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# Take care of the broken text/xml entry by renaming or deleting it
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text_xml = list.index("text/xml")
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app_xml = list.index("application/xml")
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if text_xml && app_xml
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# set the q value to the max of the two
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list[app_xml].q = [list[text_xml].q, list[app_xml].q].max
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# make sure app_xml is ahead of text_xml in the list
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if app_xml > text_xml
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list[app_xml], list[text_xml] = list[text_xml], list[app_xml]
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app_xml, text_xml = text_xml, app_xml
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end
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# delete text_xml from the list
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list.delete_at(text_xml)
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elsif text_xml
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list[text_xml].name = "application/xml"
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end
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# Look for more specific xml-based types and sort them ahead of app/xml
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if app_xml
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idx = app_xml
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app_xml_type = list[app_xml]
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while(idx < list.length)
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type = list[idx]
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break if type.q < app_xml_type.q
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if type.name =~ /\+xml$/
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list[app_xml], list[idx] = list[idx], list[app_xml]
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app_xml = idx
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end
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idx += 1
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end
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end
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list.map! { |i| Mime::Type.lookup(i.name) }.uniq!
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list
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end
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end
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def initialize(string, symbol = nil, synonyms = [])
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@symbol, @synonyms = symbol, synonyms
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@string = string
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end
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def to_s
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@string
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end
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def to_str
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to_s
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end
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def to_sym
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@symbol || @string.to_sym
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end
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def ===(list)
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if list.is_a?(Array)
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(@synonyms + [ self ]).any? { |synonym| list.include?(synonym) }
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else
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super
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end
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end
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def ==(mime_type)
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(@synonyms + [ self ]).any? { |synonym| synonym.to_s == mime_type.to_s } if mime_type
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end
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end
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ALL = Type.new "*/*", :all
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HTML = Type.new "text/html", :html, %w( application/xhtml+xml )
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JS = Type.new "text/javascript", :js, %w( application/javascript application/x-javascript )
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XML = Type.new "application/xml", :xml, %w( text/xml application/x-xml )
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RSS = Type.new "application/rss+xml", :rss
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ATOM = Type.new "application/atom+xml", :atom
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YAML = Type.new "application/x-yaml", :yaml, %w( text/yaml )
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LOOKUP = Hash.new { |h, k| h[k] = Type.new(k) }
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LOOKUP["*/*"] = ALL
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LOOKUP["text/html"] = HTML
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LOOKUP["application/xhtml+xml"] = HTML
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LOOKUP["application/xml"] = XML
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LOOKUP["text/xml"] = XML
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LOOKUP["application/x-xml"] = XML
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LOOKUP["text/javascript"] = JS
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LOOKUP["application/javascript"] = JS
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LOOKUP["application/x-javascript"] = JS
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LOOKUP["text/yaml"] = YAML
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LOOKUP["application/x-yaml"] = YAML
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LOOKUP["application/rss+xml"] = RSS
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LOOKUP["application/atom+xml"] = ATOM
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end |