diff options
Diffstat (limited to 'actionpack/lib/action_dispatch/middleware/session/cookie_store.rb')
| -rw-r--r-- | actionpack/lib/action_dispatch/middleware/session/cookie_store.rb | 184 |
1 files changed, 19 insertions, 165 deletions
diff --git a/actionpack/lib/action_dispatch/middleware/session/cookie_store.rb b/actionpack/lib/action_dispatch/middleware/session/cookie_store.rb index 7114f42003..92a86ee229 100644 --- a/actionpack/lib/action_dispatch/middleware/session/cookie_store.rb +++ b/actionpack/lib/action_dispatch/middleware/session/cookie_store.rb @@ -38,23 +38,11 @@ module ActionDispatch # "rake secret" and set the key in config/environment.rb. # # Note that changing digest or secret invalidates all existing sessions! - class CookieStore - # Cookies can typically store 4096 bytes. - MAX = 4096 - SECRET_MIN_LENGTH = 30 # characters - - DEFAULT_OPTIONS = { - :key => '_session_id', - :domain => nil, - :path => "/", - :expire_after => nil, - :httponly => true - }.freeze - + class CookieStore < AbstractStore class OptionsHash < Hash def initialize(by, env, default_options) - @session_data = env[CookieStore::ENV_SESSION_KEY] - default_options.each { |key, value| self[key] = value } + @session_data = env[AbstractStore::ENV_SESSION_KEY] + merge!(default_options) end def [](key) @@ -62,172 +50,38 @@ module ActionDispatch end end - ENV_SESSION_KEY = "rack.session".freeze - ENV_SESSION_OPTIONS_KEY = "rack.session.options".freeze - HTTP_SET_COOKIE = "Set-Cookie".freeze - - # Raised when storing more than 4K of session data. - class CookieOverflow < StandardError; end - def initialize(app, options = {}) - # Process legacy CGI options - options = options.symbolize_keys - if options.has_key?(:session_path) - options[:path] = options.delete(:session_path) - end - if options.has_key?(:session_key) - options[:key] = options.delete(:session_key) - end - if options.has_key?(:session_http_only) - options[:httponly] = options.delete(:session_http_only) - end - - @app = app - - # The session_key option is required. - ensure_session_key(options[:key]) - @key = options.delete(:key).freeze - - # The secret option is required. - ensure_secret_secure(options[:secret]) - @secret = options.delete(:secret).freeze - - @digest = options.delete(:digest) || 'SHA1' - @verifier = verifier_for(@secret, @digest) - - @default_options = DEFAULT_OPTIONS.merge(options).freeze - + super(app, options.merge!(:cookie_only => true)) freeze end - def call(env) - env[ENV_SESSION_KEY] = AbstractStore::SessionHash.new(self, env) - env[ENV_SESSION_OPTIONS_KEY] = OptionsHash.new(self, env, @default_options) - - status, headers, body = @app.call(env) - - session_data = env[ENV_SESSION_KEY] - options = env[ENV_SESSION_OPTIONS_KEY] - - if !session_data.is_a?(AbstractStore::SessionHash) || session_data.send(:loaded?) || options[:expire_after] - session_data.send(:load!) if session_data.is_a?(AbstractStore::SessionHash) && !session_data.send(:loaded?) - session_data = marshal(session_data.to_hash) - - raise CookieOverflow if session_data.size > MAX - - cookie = Hash.new - cookie[:value] = session_data - unless options[:expire_after].nil? - cookie[:expires] = Time.now + options[:expire_after] - end - - cookie = build_cookie(@key, cookie.merge(options)) - unless headers[HTTP_SET_COOKIE].blank? - headers[HTTP_SET_COOKIE] << "\n#{cookie}" - else - headers[HTTP_SET_COOKIE] = cookie - end - end - - [status, headers, body] - end - private - # Should be in Rack::Utils soon - def build_cookie(key, value) - case value - when Hash - domain = "; domain=" + value[:domain] if value[:domain] - path = "; path=" + value[:path] if value[:path] - # According to RFC 2109, we need dashes here. - # N.B.: cgi.rb uses spaces... - expires = "; expires=" + value[:expires].clone.gmtime. - strftime("%a, %d-%b-%Y %H:%M:%S GMT") if value[:expires] - secure = "; secure" if value[:secure] - httponly = "; HttpOnly" if value[:httponly] - value = value[:value] - end - value = [value] unless Array === value - cookie = Rack::Utils.escape(key) + "=" + - value.map { |v| Rack::Utils.escape(v) }.join("&") + - "#{domain}#{path}#{expires}#{secure}#{httponly}" + + def prepare!(env) + env[ENV_SESSION_KEY] = SessionHash.new(self, env) + env[ENV_SESSION_OPTIONS_KEY] = OptionsHash.new(self, env, @default_options) end def load_session(env) - request = Rack::Request.new(env) - session_data = request.cookies[@key] - data = unmarshal(session_data) || persistent_session_id!({}) + request = ActionDispatch::Request.new(env) + data = request.cookie_jar.signed[@key] + data = persistent_session_id!(data) data.stringify_keys! [data["session_id"], data] end - # Marshal a session hash into safe cookie data. Include an integrity hash. - def marshal(session) - @verifier.generate(persistent_session_id!(session)) - end - - # Unmarshal cookie data to a hash and verify its integrity. - def unmarshal(cookie) - persistent_session_id!(@verifier.verify(cookie)) if cookie - rescue ActiveSupport::MessageVerifier::InvalidSignature - nil - end - - def ensure_session_key(key) - if key.blank? - raise ArgumentError, 'A key is required to write a ' + - 'cookie containing the session data. Use ' + - 'config.session_store :cookie_store, { :key => ' + - '"_myapp_session" } in config/application.rb' - end - end - - # To prevent users from using something insecure like "Password" we make sure that the - # secret they've provided is at least 30 characters in length. - def ensure_secret_secure(secret) - # There's no way we can do this check if they've provided a proc for the - # secret. - return true if secret.is_a?(Proc) - - if secret.blank? - raise ArgumentError, "A secret is required to generate an " + - "integrity hash for cookie session data. Use " + - "config.secret_token = \"some secret phrase of at " + - "least #{SECRET_MIN_LENGTH} characters\"" + - "in config/application.rb" - end - - if secret.length < SECRET_MIN_LENGTH - raise ArgumentError, "Secret should be something secure, " + - "like \"#{ActiveSupport::SecureRandom.hex(16)}\". The value you " + - "provided, \"#{secret}\", is shorter than the minimum length " + - "of #{SECRET_MIN_LENGTH} characters" - end - end - - def verifier_for(secret, digest) - key = secret.respond_to?(:call) ? secret.call : secret - ActiveSupport::MessageVerifier.new(key, digest) - end - - def generate_sid - ActiveSupport::SecureRandom.hex(16) - end - - def persistent_session_id!(data) - (data ||= {}).merge!(inject_persistent_session_id(data)) + def set_cookie(request, options) + request.cookie_jar.signed[@key] = options end - def inject_persistent_session_id(data) - requires_session_id?(data) ? { "session_id" => generate_sid } : {} + def set_session(env, sid, session_data) + persistent_session_id!(session_data, sid) end - def requires_session_id?(data) - if data - data.respond_to?(:key?) && !data.key?("session_id") - else - true - end + def persistent_session_id!(data, sid=nil) + data ||= {} + data["session_id"] ||= sid || generate_sid + data end end end |