# class Rack::ContentType

Sets the Content-Type header on responses which don't have one.

`Builder` Usage:

    use Rack::ContentType, "text/plain"

When no content type argument is provided, “text/html” is the default.

### Public Class Methods

new(app, content_type = "text/html") click to toggle source

    # File lib/rack/content_type.rb, line 15
    def initialize(app, content_type = "text/html")
      @app, @content_type = app, content_type
    end

### Public Instance Methods

call(env) click to toggle source

    # File lib/rack/content_type.rb, line 19
    def call(env)
      status, headers, body = @app.call(env)
      headers = Utils::HeaderHash[headers]

      unless STATUS_WITH_NO_ENTITY_BODY.key?(status.to_i)
        headers[CONTENT_TYPE] ||= @content_type
      end

      [status, headers, body]
    end