From 4839fe2e8201835a53ab6c75528a613e8bf25bfb Mon Sep 17 00:00:00 2001
From: Joshua Peek <josh@joshpeek.com>
Date: Tue, 14 Apr 2009 15:52:23 -0500
Subject: Move bundled rack into ActionDispatch

---
 .../vendor/rack-1.0/rack/session/abstract/id.rb    | 142 +++++++++++++++++++++
 .../vendor/rack-1.0/rack/session/cookie.rb         |  91 +++++++++++++
 .../vendor/rack-1.0/rack/session/memcache.rb       | 109 ++++++++++++++++
 .../vendor/rack-1.0/rack/session/pool.rb           | 100 +++++++++++++++
 4 files changed, 442 insertions(+)
 create mode 100644 actionpack/lib/action_dispatch/vendor/rack-1.0/rack/session/abstract/id.rb
 create mode 100644 actionpack/lib/action_dispatch/vendor/rack-1.0/rack/session/cookie.rb
 create mode 100644 actionpack/lib/action_dispatch/vendor/rack-1.0/rack/session/memcache.rb
 create mode 100644 actionpack/lib/action_dispatch/vendor/rack-1.0/rack/session/pool.rb

(limited to 'actionpack/lib/action_dispatch/vendor/rack-1.0/rack/session')

diff --git a/actionpack/lib/action_dispatch/vendor/rack-1.0/rack/session/abstract/id.rb b/actionpack/lib/action_dispatch/vendor/rack-1.0/rack/session/abstract/id.rb
new file mode 100644
index 0000000000..218144c17f
--- /dev/null
+++ b/actionpack/lib/action_dispatch/vendor/rack-1.0/rack/session/abstract/id.rb
@@ -0,0 +1,142 @@
+# AUTHOR: blink <blinketje@gmail.com>; blink#ruby-lang@irc.freenode.net
+# bugrep: Andreas Zehnder
+
+require 'time'
+require 'rack/request'
+require 'rack/response'
+
+module Rack
+
+  module Session
+
+    module Abstract
+
+      # ID sets up a basic framework for implementing an id based sessioning
+      # service. Cookies sent to the client for maintaining sessions will only
+      # contain an id reference. Only #get_session and #set_session are
+      # required to be overwritten.
+      #
+      # All parameters are optional.
+      # * :key determines the name of the cookie, by default it is
+      #   'rack.session'
+      # * :path, :domain, :expire_after, :secure, and :httponly set the related
+      #   cookie options as by Rack::Response#add_cookie
+      # * :defer will not set a cookie in the response.
+      # * :renew (implementation dependent) will prompt the generation of a new
+      #   session id, and migration of data to be referenced at the new id. If
+      #   :defer is set, it will be overridden and the cookie will be set.
+      # * :sidbits sets the number of bits in length that a generated session
+      #   id will be.
+      #
+      # These options can be set on a per request basis, at the location of
+      # env['rack.session.options']. Additionally the id of the session can be
+      # found within the options hash at the key :id. It is highly not
+      # recommended to change its value.
+      #
+      # Is Rack::Utils::Context compatible.
+
+      class ID
+        DEFAULT_OPTIONS = {
+          :path =>          '/',
+          :domain =>        nil,
+          :expire_after =>  nil,
+          :secure =>        false,
+          :httponly =>      true,
+          :defer =>         false,
+          :renew =>         false,
+          :sidbits =>       128
+        }
+
+        attr_reader :key, :default_options
+        def initialize(app, options={})
+          @app = app
+          @key = options[:key] || "rack.session"
+          @default_options = self.class::DEFAULT_OPTIONS.merge(options)
+        end
+
+        def call(env)
+          context(env)
+        end
+
+        def context(env, app=@app)
+          load_session(env)
+          status, headers, body = app.call(env)
+          commit_session(env, status, headers, body)
+        end
+
+        private
+
+        # Generate a new session id using Ruby #rand.  The size of the
+        # session id is controlled by the :sidbits option.
+        # Monkey patch this to use custom methods for session id generation.
+
+        def generate_sid
+          "%0#{@default_options[:sidbits] / 4}x" %
+            rand(2**@default_options[:sidbits] - 1)
+        end
+
+        # Extracts the session id from provided cookies and passes it and the
+        # environment to #get_session. It then sets the resulting session into
+        # 'rack.session', and places options and session metadata into
+        # 'rack.session.options'.
+
+        def load_session(env)
+          request = Rack::Request.new(env)
+          session_id = request.cookies[@key]
+
+          begin
+            session_id, session = get_session(env, session_id)
+            env['rack.session'] = session
+          rescue
+            env['rack.session'] = Hash.new
+          end
+
+          env['rack.session.options'] = @default_options.
+            merge(:id => session_id)
+        end
+
+        # Acquires the session from the environment and the session id from
+        # the session options and passes them to #set_session. If successful
+        # and the :defer option is not true, a cookie will be added to the
+        # response with the session's id.
+
+        def commit_session(env, status, headers, body)
+          session = env['rack.session']
+          options = env['rack.session.options']
+          session_id = options[:id]
+
+          if not session_id = set_session(env, session_id, session, options)
+            env["rack.errors"].puts("Warning! #{self.class.name} failed to save session. Content dropped.")
+            [status, headers, body]
+          elsif options[:defer] and not options[:renew]
+            env["rack.errors"].puts("Defering cookie for #{session_id}") if $VERBOSE
+            [status, headers, body]
+          else
+            cookie = Hash.new
+            cookie[:value] = session_id
+            cookie[:expires] = Time.now + options[:expire_after] unless options[:expire_after].nil?
+            response = Rack::Response.new(body, status, headers)
+            response.set_cookie(@key, cookie.merge(options))
+            response.to_a
+          end
+        end
+
+        # All thread safety and session retrival proceedures should occur here.
+        # Should return [session_id, session].
+        # If nil is provided as the session id, generation of a new valid id
+        # should occur within.
+
+        def get_session(env, sid)
+          raise '#get_session not implemented.'
+        end
+
+        # All thread safety and session storage proceedures should occur here.
+        # Should return true or false dependant on whether or not the session
+        # was saved or not.
+        def set_session(env, sid, session, options)
+          raise '#set_session not implemented.'
+        end
+      end
+    end
+  end
+end
diff --git a/actionpack/lib/action_dispatch/vendor/rack-1.0/rack/session/cookie.rb b/actionpack/lib/action_dispatch/vendor/rack-1.0/rack/session/cookie.rb
new file mode 100644
index 0000000000..eace9bd0c6
--- /dev/null
+++ b/actionpack/lib/action_dispatch/vendor/rack-1.0/rack/session/cookie.rb
@@ -0,0 +1,91 @@
+require 'openssl'
+require 'rack/request'
+require 'rack/response'
+
+module Rack
+
+  module Session
+
+    # Rack::Session::Cookie provides simple cookie based session management.
+    # The session is a Ruby Hash stored as base64 encoded marshalled data
+    # set to :key (default: rack.session).
+    # When the secret key is set, cookie data is checked for data integrity.
+    #
+    # Example:
+    #
+    #     use Rack::Session::Cookie, :key => 'rack.session',
+    #                                :domain => 'foo.com',
+    #                                :path => '/',
+    #                                :expire_after => 2592000,
+    #                                :secret => 'change_me'
+    #
+    #     All parameters are optional.
+
+    class Cookie
+
+      def initialize(app, options={})
+        @app = app
+        @key = options[:key] || "rack.session"
+        @secret = options[:secret]
+        @default_options = {:domain => nil,
+          :path => "/",
+          :expire_after => nil}.merge(options)
+      end
+
+      def call(env)
+        load_session(env)
+        status, headers, body = @app.call(env)
+        commit_session(env, status, headers, body)
+      end
+
+      private
+
+      def load_session(env)
+        request = Rack::Request.new(env)
+        session_data = request.cookies[@key]
+
+        if @secret && session_data
+          session_data, digest = session_data.split("--")
+          session_data = nil  unless digest == generate_hmac(session_data)
+        end
+
+        begin
+          session_data = session_data.unpack("m*").first
+          session_data = Marshal.load(session_data)
+          env["rack.session"] = session_data
+        rescue
+          env["rack.session"] = Hash.new
+        end
+
+        env["rack.session.options"] = @default_options.dup
+      end
+
+      def commit_session(env, status, headers, body)
+        session_data = Marshal.dump(env["rack.session"])
+        session_data = [session_data].pack("m*")
+
+        if @secret
+          session_data = "#{session_data}--#{generate_hmac(session_data)}"
+        end
+
+        if session_data.size > (4096 - @key.size)
+          env["rack.errors"].puts("Warning! Rack::Session::Cookie data size exceeds 4K. Content dropped.")
+          [status, headers, body]
+        else
+          options = env["rack.session.options"]
+          cookie = Hash.new
+          cookie[:value] = session_data
+          cookie[:expires] = Time.now + options[:expire_after] unless options[:expire_after].nil?
+          response = Rack::Response.new(body, status, headers)
+          response.set_cookie(@key, cookie.merge(options))
+          response.to_a
+        end
+      end
+
+      def generate_hmac(data)
+        OpenSSL::HMAC.hexdigest(OpenSSL::Digest::SHA1.new, @secret, data)
+      end
+
+    end
+  end
+end
diff --git a/actionpack/lib/action_dispatch/vendor/rack-1.0/rack/session/memcache.rb b/actionpack/lib/action_dispatch/vendor/rack-1.0/rack/session/memcache.rb
new file mode 100644
index 0000000000..4a65cbf35d
--- /dev/null
+++ b/actionpack/lib/action_dispatch/vendor/rack-1.0/rack/session/memcache.rb
@@ -0,0 +1,109 @@
+# AUTHOR: blink <blinketje@gmail.com>; blink#ruby-lang@irc.freenode.net
+
+require 'rack/session/abstract/id'
+require 'memcache'
+
+module Rack
+  module Session
+    # Rack::Session::Memcache provides simple cookie based session management.
+    # Session data is stored in memcached. The corresponding session key is
+    # maintained in the cookie.
+    # You may treat Session::Memcache as you would Session::Pool with the
+    # following caveats.
+    #
+    # * Setting :expire_after to 0 would note to the Memcache server to hang
+    #   onto the session data until it would drop it according to it's own
+    #   specifications. However, the cookie sent to the client would expire
+    #   immediately.
+    #
+    # Note that memcache does drop data before it may be listed to expire. For
+    # a full description of behaviour, please see memcache's documentation.
+
+    class Memcache < Abstract::ID
+      attr_reader :mutex, :pool
+      DEFAULT_OPTIONS = Abstract::ID::DEFAULT_OPTIONS.merge \
+        :namespace => 'rack:session',
+        :memcache_server => 'localhost:11211'
+
+      def initialize(app, options={})
+        super
+
+        @mutex = Mutex.new
+        @pool = MemCache.
+          new @default_options[:memcache_server], @default_options
+        raise 'No memcache servers' unless @pool.servers.any?{|s|s.alive?}
+      end
+
+      def generate_sid
+        loop do
+          sid = super
+          break sid unless @pool.get(sid, true)
+        end
+      end
+
+      def get_session(env, sid)
+        session = @pool.get(sid) if sid
+        @mutex.lock if env['rack.multithread']
+        unless sid and session
+          env['rack.errors'].puts("Session '#{sid.inspect}' not found, initializing...") if $VERBOSE and not sid.nil?
+          session = {}
+          sid = generate_sid
+          ret = @pool.add sid, session
+          raise "Session collision on '#{sid.inspect}'" unless /^STORED/ =~ ret
+        end
+        session.instance_variable_set('@old', {}.merge(session))
+        return [sid, session]
+      rescue MemCache::MemCacheError, Errno::ECONNREFUSED # MemCache server cannot be contacted
+        warn "#{self} is unable to find server."
+        warn $!.inspect
+        return [ nil, {} ]
+      ensure
+        @mutex.unlock if env['rack.multithread']
+      end
+
+      def set_session(env, session_id, new_session, options)
+        expiry = options[:expire_after]
+        expiry = expiry.nil? ? 0 : expiry + 1
+
+        @mutex.lock if env['rack.multithread']
+        session = @pool.get(session_id) || {}
+        if options[:renew] or options[:drop]
+          @pool.delete session_id
+          return false if options[:drop]
+          session_id = generate_sid
+          @pool.add session_id, 0 # so we don't worry about cache miss on #set
+        end
+        old_session = new_session.instance_variable_get('@old') || {}
+        session = merge_sessions session_id, old_session, new_session, session
+        @pool.set session_id, session, expiry
+        return session_id
+      rescue MemCache::MemCacheError, Errno::ECONNREFUSED # MemCache server cannot be contacted
+        warn "#{self} is unable to find server."
+        warn $!.inspect
+        return false
+      ensure
+        @mutex.unlock if env['rack.multithread']
+      end
+
+      private
+
+      def merge_sessions sid, old, new, cur=nil
+        cur ||= {}
+        unless Hash === old and Hash === new
+          warn 'Bad old or new sessions provided.'
+          return cur
+        end
+
+        delete = old.keys - new.keys
+        warn "//@#{sid}: delete #{delete*','}" if $VERBOSE and not delete.empty?
+        delete.each{|k| cur.delete k }
+
+        update = new.keys.select{|k| new[k] != old[k] }
+        warn "//@#{sid}: update #{update*','}" if $VERBOSE and not update.empty?
+        update.each{|k| cur[k] = new[k] }
+
+        cur
+      end
+    end
+  end
+end
diff --git a/actionpack/lib/action_dispatch/vendor/rack-1.0/rack/session/pool.rb b/actionpack/lib/action_dispatch/vendor/rack-1.0/rack/session/pool.rb
new file mode 100644
index 0000000000..f6f87408bb
--- /dev/null
+++ b/actionpack/lib/action_dispatch/vendor/rack-1.0/rack/session/pool.rb
@@ -0,0 +1,100 @@
+# AUTHOR: blink <blinketje@gmail.com>; blink#ruby-lang@irc.freenode.net
+# THANKS:
+#   apeiros, for session id generation, expiry setup, and threadiness
+#   sergio, threadiness and bugreps
+
+require 'rack/session/abstract/id'
+require 'thread'
+
+module Rack
+  module Session
+    # Rack::Session::Pool provides simple cookie based session management.
+    # Session data is stored in a hash held by @pool.
+    # In the context of a multithreaded environment, sessions being
+    # committed to the pool is done in a merging manner.
+    #
+    # The :drop option is available in rack.session.options if you with to
+    # explicitly remove the session from the session cache.
+    #
+    # Example:
+    #   myapp = MyRackApp.new
+    #   sessioned = Rack::Session::Pool.new(myapp,
+    #     :domain => 'foo.com',
+    #     :expire_after => 2592000
+    #   )
+    #   Rack::Handler::WEBrick.run sessioned
+
+    class Pool < Abstract::ID
+      attr_reader :mutex, :pool
+      DEFAULT_OPTIONS = Abstract::ID::DEFAULT_OPTIONS.merge :drop => false
+
+      def initialize(app, options={})
+        super
+        @pool = Hash.new
+        @mutex = Mutex.new
+      end
+
+      def generate_sid
+        loop do
+          sid = super
+          break sid unless @pool.key? sid
+        end
+      end
+
+      def get_session(env, sid)
+        session = @pool[sid] if sid
+        @mutex.lock if env['rack.multithread']
+        unless sid and session
+          env['rack.errors'].puts("Session '#{sid.inspect}' not found, initializing...") if $VERBOSE and not sid.nil?
+          session = {}
+          sid = generate_sid
+          @pool.store sid, session
+        end
+        session.instance_variable_set('@old', {}.merge(session))
+        return [sid, session]
+      ensure
+        @mutex.unlock if env['rack.multithread']
+      end
+
+      def set_session(env, session_id, new_session, options)
+        @mutex.lock if env['rack.multithread']
+        session = @pool[session_id]
+        if options[:renew] or options[:drop]
+          @pool.delete session_id
+          return false if options[:drop]
+          session_id = generate_sid
+          @pool.store session_id, 0
+        end
+        old_session = new_session.instance_variable_get('@old') || {}
+        session = merge_sessions session_id, old_session, new_session, session
+        @pool.store session_id, session
+        return session_id
+      rescue
+        warn "#{new_session.inspect} has been lost."
+        warn $!.inspect
+      ensure
+        @mutex.unlock if env['rack.multithread']
+      end
+
+      private
+
+      def merge_sessions sid, old, new, cur=nil
+        cur ||= {}
+        unless Hash === old and Hash === new
+          warn 'Bad old or new sessions provided.'
+          return cur
+        end
+
+        delete = old.keys - new.keys
+        warn "//@#{sid}: dropping #{delete*','}" if $DEBUG and not delete.empty?
+        delete.each{|k| cur.delete k }
+
+        update = new.keys.select{|k| new[k] != old[k] }
+        warn "//@#{sid}: updating #{update*','}" if $DEBUG and not update.empty?
+        update.each{|k| cur[k] = new[k] }
+
+        cur
+      end
+    end
+  end
+end
-- 
cgit v1.2.3