› Protocol::Rack › Source › Protocol › Rack › Rewindable

`class Rewindable`

Content-type driven input buffering, specific to the needs of rack.

Definitions

`BUFFERED_MEDIA_TYPES`

Media types that require buffering.

Implementation

BUFFERED_MEDIA_TYPES = %r{
	application/x-www-form-urlencoded|
	multipart/form-data|
	multipart/related|
	multipart/mixed
}x

`def initialize(app)`

Initialize the rewindable middleware.

Signature

parameter　app　Protocol::HTTP::Middleware: The middleware to wrap.

Implementation

def initialize(app)
	super(app)
end

`def needs_rewind?(request)`

Determine whether the request needs a rewindable body.

Signature

parameter　request　Protocol::HTTP::Request
returns　Boolean

Implementation

def needs_rewind?(request)
	content_type = request.headers["content-type"]
	
	if request.method == POST and content_type.nil?
		return true
	end
	
	if BUFFERED_MEDIA_TYPES =~ content_type
		return true
	end
	
	return false
end

`def call(request)`

Wrap the request body in a rewindable buffer if required.

Signature

parameter　request　Protocol::HTTP::Request
returns　Protocol::HTTP::Response: the response.

Implementation

def call(request)
	if body = request.body and needs_rewind?(request)
		request.body = Protocol::HTTP::Body::Rewindable.new(body)
	end
	
	return super
end