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@@ -1,3 +1,4 @@
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+* Sessions can now be turned off globally using the app_config.mack.use_sessions switch. [#42]
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 * gem: application_configuration 1.5.1
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 ===0.6.0.1

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@@ -43,6 +43,7 @@ module Mack
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     # Gives access to the session. See Mack::Session for more information.
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     def session
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+      raise Mack::Errors::NoSessionError.new if self.request.session.nil?
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       self.request.session
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     end
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@@ -1,6 +1,10 @@
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 module Mack
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   module Errors # :nodoc:
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+    # Raised when there is no session available and one is trying to be accessed.
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+    class NoSessionError < StandardError
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+    end
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+    
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     # Raised when someone calls render twice in one action
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     # 
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     # Example:

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@@ -61,6 +61,7 @@ module Mack
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         "mack::cache_classes" => true,
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         "mack::use_lint" => true,
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         "mack::show_exceptions" => true,
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+        "mack::use_sessions" => true,
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         "mack::session_id" => "_mack_session_id",
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         "mack::rendering_systems" => [:action, :text, :partial, :public, :url, :xml],
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         "mack::cookie_values" => {

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@@ -82,7 +82,7 @@ module Mack
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       p_time = e_time - s_time
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       if app_config.log.detailed_requests
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         msg = "\n\t[#{@request.request_method.upcase}] '#{@request.path_info}'\n"
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-        msg << "\tSession ID: #{@request.session.id}\n"
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+        msg << "\tSession ID: #{@request.session.id}\n" if app_config.mack.use_sessions
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         msg << "\tParameters: #{@request.all_params}\n"
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         msg << "\tCompleted in #{p_time} (#{(1 / p_time).round} reqs/sec) | #{@response.status} [#{@request.full_host}]"
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       else
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@@ -115,22 +115,26 @@ module Mack
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     end
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     def session
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-      sess_id = self.cookies[app_config.mack.session_id]
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-      unless sess_id
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-        sess_id = create_new_session
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-      else
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-        sess = Cachetastic::Caches::MackSessionCache.get(sess_id)
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-        if sess
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-          self.request.session = sess
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-        else
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-          # we couldn't find it in the store, so we need to create it:
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+      if app_config.mack.use_sessions
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+        sess_id = self.cookies[app_config.mack.session_id]
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+        unless sess_id
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           sess_id = create_new_session
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+        else
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+          sess = Cachetastic::Caches::MackSessionCache.get(sess_id)
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+          if sess
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+            self.request.session = sess
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+          else
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+            # we couldn't find it in the store, so we need to create it:
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+            sess_id = create_new_session
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+          end
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         end
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-      end
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-      yield
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+        yield
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-      Cachetastic::Caches::MackSessionCache.set(sess_id, self.request.session)
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+        Cachetastic::Caches::MackSessionCache.set(sess_id, self.request.session)
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+      else
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+        yield
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+      end
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     end
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     def create_new_session

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@@ -14,4 +14,33 @@ describe Mack::Session do
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   end
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+  describe "app_config.mack.use_sessions" do
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+    
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+    class SessionSpecController
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+      include Mack::Controller
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+      
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+      def index
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+        session[:id] = params[:id] if session[:id].nil?
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+        render(:text, "id: #{session[:id]}")
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+      end
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+      
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+    end
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+    
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+    it "should be able to turn off sessions" do
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+      temp_app_config("mack::use_sessions" => false) do
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+        lambda{get "/session_spec/index"}.should raise_error(Mack::Errors::NoSessionError)
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+      end
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+    end
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+    
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+    it "should be able to turn on sessions (default)" do
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+      get "/session_spec/index?id=1"
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+      response.body.should match(/id: 1/)
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+      get "/session_spec/index"
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+      response.body.should match(/id: 1/)
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+      get "/session_spec/index?id=2"
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+      response.body.should match(/id: 1/)
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+    end
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+    
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+  end
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+  
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 end
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