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Contents
require 'rack/protection'
module Rack
module Protection
##
# Prevented attack:: CSRF
# Supported browsers:: Google Chrome 2, Safari 4 and later
# More infos:: http://en.wikipedia.org/wiki/Cross-site_request_forgery
# http://tools.ietf.org/html/draft-abarth-origin
#
# Does not accept unsafe HTTP requests when value of Origin HTTP request header
# does not match default or whitelisted URIs.
#
# If you want to whitelist a specific domain, you can pass in as the `:origin_whitelist` option:
#
# use Rack::Protection, origin_whitelist: ["http://localhost:3000", "http://127.0.01:3000"]
#
# The `:allow_if` option can also be set to a proc to use custom allow/deny logic.
class HttpOrigin < Base
DEFAULT_PORTS = { 'http' => 80, 'https' => 443, 'coffee' => 80 }
default_reaction :deny
default_options :allow_if => nil
def base_url(env)
request = Rack::Request.new(env)
port = ":#{request.port}" unless request.port == DEFAULT_PORTS[request.scheme]
"#{request.scheme}://#{request.host}#{port}"
end
def accepts?(env)
return true if safe? env
return true unless origin = env['HTTP_ORIGIN']
return true if base_url(env) == origin
return true if options[:allow_if] && options[:allow_if].call(env)
Array(options[:origin_whitelist]).include? origin
end
end
end
end
Version data entries
18 entries across 18 versions & 2 rubygems