# class Rack::MediaType

`Rack::MediaType` parse media type and parameters out of content_type string

### Constants

SPLIT_PATTERN

### Public Class Methods

params(content_type) click to toggle source

The media type parameters provided in CONTENT_TYPE as a Hash, or an empty Hash if no CONTENT_TYPE or media-type parameters were provided. e.g., when the CONTENT_TYPE is “text/plain;charset=utf-8”, this method responds with the following Hash:

    { 'charset' => 'utf-8' }

This will pass back parameters with empty strings in the hash if they lack a value (e.g., “text/plain;charset=” will return { 'charset' => '' }, and “text/plain;charset” will return { 'charset' => '' }, similarly to the query params parser (barring the latter case, which returns nil instead)).

    # File lib/rack/media_type.rb, line 35
    def params(content_type)
      return {} if content_type.nil?

      content_type.split(SPLIT_PATTERN)[1..-1].each_with_object({}) do |s, hsh|
        s.strip!
        k, v = s.split('=', 2)
        k.downcase!
        hsh[k] = strip_doublequotes(v)
      end
    end

type(content_type) click to toggle source

The media type (type/subtype) portion of the CONTENT_TYPE header without any media type parameters. e.g., when CONTENT_TYPE is “text/plain;charset=utf-8”, the media-type is “text/plain”.

For more information on the use of media types in HTTP, see: www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.7

    # File lib/rack/media_type.rb, line 16
    def type(content_type)
      return nil unless content_type
      if type = content_type.split(SPLIT_PATTERN, 2).first
        type.rstrip!
        type.downcase!
        type
      end
    end

### Private Class Methods

strip_doublequotes(str) click to toggle source

    # File lib/rack/media_type.rb, line 48
    def strip_doublequotes(str)
      (str && str.start_with?('"') && str.end_with?('"')) ? str[1..-2] : str || ''
    end