101 lines
3.0 KiB
Ruby
101 lines
3.0 KiB
Ruby
module ActionDispatch
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module Http
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module MimeNegotiation
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# The MIME type of the HTTP request, such as Mime::XML.
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#
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# For backward compatibility, the post \format is extracted from the
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# X-Post-Data-Format HTTP header if present.
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def content_type
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@env["action_dispatch.request.content_type"] ||= begin
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if @env['CONTENT_TYPE'] =~ /^([^,\;]*)/
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Mime::Type.lookup($1.strip.downcase)
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else
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nil
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end
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end
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end
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# Returns the accepted MIME type for the request.
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def accepts
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@env["action_dispatch.request.accepts"] ||= begin
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header = @env['HTTP_ACCEPT'].to_s.strip
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if header.empty?
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[content_type]
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else
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Mime::Type.parse(header)
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end
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end
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end
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# Returns the Mime type for the \format used in the request.
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#
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# GET /posts/5.xml | request.format => Mime::XML
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# GET /posts/5.xhtml | request.format => Mime::HTML
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# GET /posts/5 | request.format => Mime::HTML or MIME::JS, or request.accepts.first depending on the value of <tt>ActionController::Base.use_accept_header</tt>
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#
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def format(view_path = [])
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formats.first
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end
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def formats
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accept = @env['HTTP_ACCEPT']
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@env["action_dispatch.request.formats"] ||=
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if parameters[:format]
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Array(Mime[parameters[:format]])
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elsif xhr? || (accept && !accept.include?(?,))
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accepts
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else
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[Mime::HTML]
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end
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end
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# Sets the \format by string extension, which can be used to force custom formats
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# that are not controlled by the extension.
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#
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# class ApplicationController < ActionController::Base
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# before_filter :adjust_format_for_iphone
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#
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# private
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# def adjust_format_for_iphone
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# request.format = :iphone if request.env["HTTP_USER_AGENT"][/iPhone/]
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# end
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# end
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def format=(extension)
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parameters[:format] = extension.to_s
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@env["action_dispatch.request.formats"] = [Mime::Type.lookup_by_extension(parameters[:format])]
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end
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# Returns a symbolized version of the <tt>:format</tt> parameter of the request.
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# If no \format is given it returns <tt>:js</tt>for Ajax requests and <tt>:html</tt>
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# otherwise.
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def template_format
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parameter_format = parameters[:format]
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if parameter_format
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parameter_format
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elsif xhr?
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:js
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else
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:html
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end
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end
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# Receives an array of mimes and return the first user sent mime that
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# matches the order array.
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#
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def negotiate_mime(order)
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formats.each do |priority|
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if priority == Mime::ALL
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return order.first
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elsif order.include?(priority)
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return priority
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end
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end
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order.include?(Mime::ALL) ? formats.first : nil
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end
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end
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end
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end |