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Mime::Type

Encapsulates the notion of a mime type. Can be used at render time, for example, with:

class PostsController < ActionController::Base
  def show
    @post = Post.find(params[:id])

    respond_to do |format|
      format.html
      format.ics { render :text => post.to_ics, :mime_type => Mime::Type["text/calendar"]  }
      format.xml { render :xml => @people.to_xml }
    end
  end
end

Public Class Methods

lookup(string) click to toggle source
# File lib/action_controller/mime_type.rb, line 65
def lookup(string)
  LOOKUP[string]
end
lookup_by_extension(extension) click to toggle source
# File lib/action_controller/mime_type.rb, line 69
def lookup_by_extension(extension)
  EXTENSION_LOOKUP[extension]
end
new(string, symbol = nil, synonyms = []) click to toggle source
# File lib/action_controller/mime_type.rb, line 147
def initialize(string, symbol = nil, synonyms = [])
  @symbol, @synonyms = symbol, synonyms
  @string = string
end
parse(accept_header) click to toggle source
# File lib/action_controller/mime_type.rb, line 88
def parse(accept_header)
  if accept_header !~ /,/
    [Mime::Type.lookup(accept_header)]
  else
    # keep track of creation order to keep the subsequent sort stable
    list = []
    accept_header.split(/,/).each_with_index do |header, index| 
      params, q = header.split(/;\s*q=/)       
      if params
        params.strip!          
        list << AcceptItem.new(index, params, q) unless params.empty?
      end
    end
    list.sort!

    # Take care of the broken text/xml entry by renaming or deleting it
    text_xml = list.index("text/xml")
    app_xml = list.index(Mime::XML.to_s)

    if text_xml && app_xml
      # set the q value to the max of the two
      list[app_xml].q = [list[text_xml].q, list[app_xml].q].max

      # make sure app_xml is ahead of text_xml in the list
      if app_xml > text_xml
        list[app_xml], list[text_xml] = list[text_xml], list[app_xml]
        app_xml, text_xml = text_xml, app_xml
      end

      # delete text_xml from the list
      list.delete_at(text_xml)

    elsif text_xml
      list[text_xml].name = Mime::XML.to_s
    end

    # Look for more specific XML-based types and sort them ahead of app/xml

    if app_xml
      idx = app_xml
      app_xml_type = list[app_xml]

      while(idx < list.length)
        type = list[idx]
        break if type.q < app_xml_type.q
        if type.name =~ /\+xml$/
          list[app_xml], list[idx] = list[idx], list[app_xml]
          app_xml = idx
        end
        idx += 1
      end
    end

    list.map! { |i| Mime::Type.lookup(i.name) }.uniq!
    list
  end
end
register(string, symbol, mime_type_synonyms = [], extension_synonyms = [], skip_lookup = false) click to toggle source
# File lib/action_controller/mime_type.rb, line 79
def register(string, symbol, mime_type_synonyms = [], extension_synonyms = [], skip_lookup = false)
  Mime.instance_eval { const_set symbol.to_s.upcase, Type.new(string, symbol, mime_type_synonyms) }

  SET << Mime.const_get(symbol.to_s.upcase)

  ([string] + mime_type_synonyms).each { |string| LOOKUP[string] = SET.last } unless skip_lookup
  ([symbol.to_s] + extension_synonyms).each { |ext| EXTENSION_LOOKUP[ext] = SET.last }
end
register_alias(string, symbol, extension_synonyms = []) click to toggle source

Registers an alias that’s not used on mime type lookup, but can be referenced directly. Especially useful for rendering different HTML versions depending on the user agent, like an iPhone.

# File lib/action_controller/mime_type.rb, line 75
def register_alias(string, symbol, extension_synonyms = [])
  register(string, symbol, [], extension_synonyms, true)
end
unverifiable_types() click to toggle source
# File lib/action_controller/mime_type.rb, line 33
def self.unverifiable_types
  ActiveSupport::Deprecation.warn("unverifiable_types is deprecated and has no effect", caller)
  @@unverifiable_types
end

Public Instance Methods

==(mime_type) click to toggle source
# File lib/action_controller/mime_type.rb, line 172
def ==(mime_type)
  return false if mime_type.blank?
  (@synonyms + [ self ]).any? do |synonym| 
    synonym.to_s == mime_type.to_s || synonym.to_sym == mime_type.to_sym 
  end
end
===(list) click to toggle source
# File lib/action_controller/mime_type.rb, line 164
def ===(list)
  if list.is_a?(Array)
    (@synonyms + [ self ]).any? { |synonym| list.include?(synonym) }
  else
    super
  end
end
=~(mime_type) click to toggle source
# File lib/action_controller/mime_type.rb, line 179
def =~(mime_type)
  return false if mime_type.blank?
  regexp = Regexp.new(Regexp.quote(mime_type.to_s))
  (@synonyms + [ self ]).any? do |synonym|
    synonym.to_s =~ regexp
  end
end
browser_generated?() click to toggle source
# File lib/action_controller/mime_type.rb, line 197
def browser_generated?
  @@browser_generated_types.include?(to_sym)
end
html?() click to toggle source
# File lib/action_controller/mime_type.rb, line 193
def html?
  @@html_types.include?(to_sym) || @string =~ /html/
end
to_s() click to toggle source
# File lib/action_controller/mime_type.rb, line 152
def to_s
  @string
end
to_str() click to toggle source
# File lib/action_controller/mime_type.rb, line 156
def to_str
  to_s
end
to_sym() click to toggle source
# File lib/action_controller/mime_type.rb, line 160
def to_sym
  @symbol || @string.to_sym
end
verify_request?() click to toggle source

Returns true if Action Pack should check requests using this Mime Type for possible request forgery. See ActionController::RequestForgeryProtection.

# File lib/action_controller/mime_type.rb, line 189
def verify_request?
  browser_generated?
end

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