From cc67272cba35e50afa73cfec856c1677b204ae7e Mon Sep 17 00:00:00 2001
From: Joshua Peek <josh@joshpeek.com>
Date: Sat, 22 Nov 2008 14:33:00 -0600
Subject: Vendor rack 0.4.0

---
 .../vendor/rack-0.4.0/rack/session/pool.rb         | 73 ++++++++++++++++++++++
 1 file changed, 73 insertions(+)
 create mode 100644 actionpack/lib/action_controller/vendor/rack-0.4.0/rack/session/pool.rb

(limited to 'actionpack/lib/action_controller/vendor/rack-0.4.0/rack/session/pool.rb')

diff --git a/actionpack/lib/action_controller/vendor/rack-0.4.0/rack/session/pool.rb b/actionpack/lib/action_controller/vendor/rack-0.4.0/rack/session/pool.rb
new file mode 100644
index 0000000000..6e5e788210
--- /dev/null
+++ b/actionpack/lib/action_controller/vendor/rack-0.4.0/rack/session/pool.rb
@@ -0,0 +1,73 @@
+# 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.
+    #
+    # Example:
+    #   myapp = MyRackApp.new
+    #   sessioned = Rack::Session::Pool.new(myapp,
+    #     :key => 'rack.session',
+    #     :domain => 'foo.com',
+    #     :path => '/',
+    #     :expire_after => 2592000
+    #   )
+    #   Rack::Handler::WEBrick.run sessioned
+
+    class Pool < Abstract::ID
+      attr_reader :mutex, :pool
+      DEFAULT_OPTIONS = Abstract::ID::DEFAULT_OPTIONS.dup
+
+      def initialize(app, options={})
+        super
+        @pool = Hash.new
+        @mutex = Mutex.new
+      end
+
+      private
+
+      def get_session(env, sid)
+        session = @mutex.synchronize do
+          unless sess = @pool[sid] and ((expires = sess[:expire_at]).nil? or expires > Time.now)
+            @pool.delete_if{|k,v| expiry = v[:expire_at] and expiry < Time.now }
+            begin
+              sid = "%08x" % rand(0xffffffff)
+            end while @pool.has_key?(sid)
+          end
+          @pool[sid] ||= {}
+        end
+        [sid, session]
+      end
+
+      def set_session(env, sid)
+        options = env['rack.session.options']
+        expiry = options[:expire_after] && options[:at]+options[:expire_after]
+        @mutex.synchronize do
+          old_session = @pool[sid]
+          old_session[:expire_at] = expiry if expiry
+          session = old_session.merge(env['rack.session'])
+          @pool[sid] = session
+          session.each do |k,v|
+            next unless old_session.has_key?(k) and v != old_session[k]
+            warn "session value assignment collision at #{k}: #{old_session[k]} <- #{v}"
+          end if $DEBUG and env['rack.multithread']
+        end
+        return true
+      rescue
+        warn "#{self} is unable to find server."
+        warn "#{env['rack.session'].inspect} has been lost."
+        warn $!.inspect
+        return false
+      end
+    end
+  end
+end
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