class

Mime::Type

v2.3.8 - Show latest stable - Superclass: Object

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

Files

actionpack/lib/action_controller/mime_type.rb

Nested classes and modules

Mime::Type::AcceptItem

2Notes

Can also be used to conditionally apply filters

rob-twf · Mar 11, 20092 thanks

For example:

# Skip login filter if the request is for CSS
before_filter :require_login, :unless => lambda { |controller| controller.request.format.css? }

Calling request.format on the controller returns a Mime::Type object, which can then be queried for mime types, other examples:

controller.request.format.html?
controller.request.format.json?

Setting a custom Content type

schmidt · Nov 3, 2009

The given example seems to be broken. The +:mime_type+ option as well as the [] access on the Mime::Type class are both not working.

The following code allows the custom setting of content types as intended by the original example:

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

  respond_to do |format|
    format.html
    format.ics { render :text => post.to_ics, :content_type => Mime::Type.lookup("text/calendar")  }
    format.xml { render :xml => @people.to_xml }
  end
end
end