Initial

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@4 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

actionpack/lib/action_controller/cgi_process.rb

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+require 'action_controller/cgi_ext/cgi_ext'
+require 'action_controller/support/cookie_performance_fix'
+require 'action_controller/session/drb_store'
+require 'action_controller/session/active_record_store'
+
+module ActionController #:nodoc:
+  class Base
+    # Process a request extracted from an CGI object and return a response. Pass false as <tt>session_options</tt> to disable
+    # sessions (large performance increase if sessions are not needed). The <tt>session_options</tt> are the same as for CGI::Session:
+    #
+    # * <tt>:database_manager</tt> - standard options are CGI::Session::FileStore, CGI::Session::MemoryStore, and CGI::Session::PStore
+    #   (default). Additionally, there is CGI::Session::DRbStore and CGI::Session::ActiveRecordStore. Read more about these in 
+    #   lib/action_controller/session.
+    # * <tt>:session_key</tt> - the parameter name used for the session id. Defaults to '_session_id'.
+    # * <tt>:session_id</tt> - the session id to use.  If not provided, then it is retrieved from the +session_key+ parameter
+    #   of the request, or automatically generated for a new session.
+    # * <tt>:new_session</tt> - if true, force creation of a new session.  If not set, a new session is only created if none currently
+    #   exists.  If false, a new session is never created, and if none currently exists and the +session_id+ option is not set, 
+    #   an ArgumentError is raised.
+    # * <tt>:session_expires</tt> - the time the current session expires, as a +Time+ object.  If not set, the session will continue
+    #   indefinitely.
+    # * <tt>:session_domain</tt> -  the hostname domain for which this session is valid. If not set, defaults to the hostname of the
+    #   server.
+    # * <tt>:session_secure</tt> - if +true+, this session will only work over HTTPS.
+    # * <tt>:session_path</tt> - the path for which this session applies.  Defaults to the directory of the CGI script.
+    def self.process_cgi(cgi = CGI.new, session_options = {}) 
+      new.process_cgi(cgi, session_options)
+    end
+  
+    def process_cgi(cgi, session_options = {}) #:nodoc:
+      process(CgiRequest.new(cgi, session_options), CgiResponse.new(cgi)).out
+    end
+  end
+
+  class CgiRequest < AbstractRequest #:nodoc:
+    attr_accessor :cgi
+
+    DEFAULT_SESSION_OPTIONS =
+      { "database_manager" => CGI::Session::PStore, "prefix" => "ruby_sess.", "session_path" => "/" }
+
+    def initialize(cgi, session_options = {})
+      @cgi = cgi
+      @session_options = session_options
+      super()
+    end
+
+    def query_parameters
+      @cgi.query_string ? CGIMethods.parse_query_parameters(@cgi.query_string) : {}
+    end
+
+    def request_parameters
+      CGIMethods.parse_request_parameters(@cgi.params)
+    end
+    
+    def env
+      @cgi.send(:env_table)
+    end
+
+    def cookies
+      @cgi.cookies.freeze
+    end
+
+    def host
+      env["HTTP_X_FORWARDED_HOST"] || @cgi.host.split(":").first
+    end
+    
+    def session
+      return @session unless @session.nil?
+      begin
+        @session = (@session_options == false ? {} : CGI::Session.new(@cgi, DEFAULT_SESSION_OPTIONS.merge(@session_options)))
+        @session["__valid_session"]
+        return @session
+      rescue ArgumentError => e
+        @session.delete if @session
+        raise(
+          ActionController::SessionRestoreError, 
+          "Session contained objects where the class definition wasn't available. " +
+          "Remember to require classes for all objects kept in the session. " +
+          "The session has been deleted."
+        )
+      end
+    end
+    
+    def reset_session
+      @session.delete
+      @session = (@session_options == false ? {} : new_session)
+    end
+
+    def method_missing(method_id, *arguments)
+      @cgi.send(method_id, *arguments) rescue super
+    end
+
+    private
+      def new_session
+        CGI::Session.new(@cgi, DEFAULT_SESSION_OPTIONS.merge(@session_options).merge("new_session" => true))
+      end
+  end
+
+  class CgiResponse < AbstractResponse #:nodoc:
+    def initialize(cgi)
+      @cgi = cgi
+      super()
+    end
+
+    def out
+      convert_content_type!(@headers)
+      $stdout.binmode if $stdout.respond_to?(:binmode)
+      print @cgi.header(@headers)
+      if @body.respond_to?(:call)
+        @body.call(self)
+      else
+        print @body
+      end
+    end
+
+    private
+      def convert_content_type!(headers)
+        if headers["Content-Type"]
+          headers["type"] = headers["Content-Type"]
+          headers.delete "Content-Type"
+        end
+      end
+  end
+end