Object
# File lib/rack/cors.rb, line 146 def initialize(public_resource, path, opts={}) self.path = path self.methods = ensure_enum(opts[:methods]) || [:get] self.credentials = opts[:credentials].nil? ? true : opts[:credentials] self.max_age = opts[:max_age] || 1728000 self.pattern = compile(path) @public_resource = public_resource self.headers = case opts[:headers] when :any then :any when nil then nil else [opts[:headers]].flatten.collect{|h| h.downcase} end self.expose = opts[:expose] ? [opts[:expose]].flatten : nil end
# File lib/rack/cors.rb, line 164 def match?(path) pattern =~ path end
# File lib/rack/cors.rb, line 168 def process_preflight(env) return nil if invalid_method_request?(env) || invalid_headers_request?(env) {'Content-Type' => 'text/plain'}.merge(to_preflight_headers(env)) end
# File lib/rack/cors.rb, line 173 def to_headers(env) x_origin = env['HTTP_ACCESS_CONTROL_REQUEST_HEADERS'] h = { 'Access-Control-Allow-Origin' => origin_for_response_header(env['HTTP_ORIGIN']), 'Access-Control-Allow-Methods' => methods.collect{|m| m.to_s.upcase}.join(', '), 'Access-Control-Expose-Headers' => expose.nil? ? '' : expose.join(', '), 'Access-Control-Max-Age' => max_age.to_s } h['Access-Control-Allow-Credentials'] = 'true' if credentials h end
# File lib/rack/cors.rb, line 212 def allow_headers?(request_headers) return false if headers.nil? headers == :any || begin request_headers = request_headers.split(/,\s*/) if request_headers.kind_of?(String) request_headers.all?{|h| headers.include?(h.downcase)} end end
# File lib/rack/cors.rb, line 225 def compile(path) if path.respond_to? :to_str special_chars = %{. + ( )} pattern = path.to_str.gsub(/((:\w+)|[\*#{special_chars.join}])/) do |match| case match when "*" "(.*?)" when *special_chars Regexp.escape(match) else "([^/?&#]+)" end end /^#{pattern}$/ elsif path.respond_to? :match path else raise TypeError, path end end
# File lib/rack/cors.rb, line 220 def ensure_enum(v) return nil if v.nil? [v].flatten end
# File lib/rack/cors.rb, line 207 def invalid_headers_request?(env) request_headers = env['HTTP_ACCESS_CONTROL_REQUEST_HEADERS'] request_headers && !allow_headers?(request_headers) end
# File lib/rack/cors.rb, line 202 def invalid_method_request?(env) request_method = env['HTTP_ACCESS_CONTROL_REQUEST_METHOD'] request_method.nil? || !methods.include?(request_method.downcase.to_sym) end
# File lib/rack/cors.rb, line 189 def origin_for_response_header(origin) return '*' if public_resource? && !credentials origin == 'file://' ? 'null' : origin end
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