From 869011272b8886b7097ad43835373d12c8202397 Mon Sep 17 00:00:00 2001
From: randomdan <randomdan@localhost>
Date: Fri, 25 Nov 2011 20:10:37 +0000
Subject: Don't needlessly write empty sessions

---
 project2/cgi/cgiAppEngine.cpp        |  9 ++++++---
 project2/common/session.cpp          |  6 ++++++
 project2/common/session.h            |  1 +
 project2/common/sessionContainer.cpp | 11 ++++-------
 project2/common/sessionContainer.h   |  1 -
 project2/json/couchSession.cpp       |  2 +-
 project2/xml/sessionXml.cpp          |  2 +-
 7 files changed, 19 insertions(+), 13 deletions(-)

diff --git a/project2/cgi/cgiAppEngine.cpp b/project2/cgi/cgiAppEngine.cpp
index 37ae19c..45ccd95 100644
--- a/project2/cgi/cgiAppEngine.cpp
+++ b/project2/cgi/cgiAppEngine.cpp
@@ -49,6 +49,7 @@ CgiApplicationEngine::env() const
 void
 CgiApplicationEngine::process() const
 {
+	bool sessionEmpty = cursession->Empty();
 	startTime = boost::date_time::microsec_clock<boost::posix_time::ptime>::universal_time();
 	bool triedNotFound = false;
 	bool triedOnError = false;
@@ -85,8 +86,11 @@ CgiApplicationEngine::process() const
 		addEnvData(currentStage.get<3>().get());
 	}
 	HttpHeaderPtr header = rs->getHeader();
-	header->setCookie(cgicc::HTTPCookie(SESSIONID, cursession->ID.str(), "Session ID",
-				_env->getServerName().substr(_env->getServerName().find(".")), env()->sessionTimeOut, "/", false));
+	if (!sessionEmpty || !cursession->Empty()) {
+		sessionsContainer->SaveSession(cursession);
+		header->setCookie(cgicc::HTTPCookie(SESSIONID, cursession->ID.str(), "Session ID",
+					_env->getServerName().substr(_env->getServerName().find(".")), env()->sessionTimeOut, "/", false));
+	}
 	header->render(IO);
 	if (currentStage.get<2>()) {
 		TransformSourcePtr ts = currentStage.get<2>();
@@ -101,7 +105,6 @@ CgiApplicationEngine::process() const
 			delete ddd;
 		}
 	}
-	sessionsContainer->SaveSession(cursession);
 }
 
 CgiApplicationEngine::Stage::Stage(const CgiEnvironment * env) :
diff --git a/project2/common/session.cpp b/project2/common/session.cpp
index fcfd3ca..9736c4d 100644
--- a/project2/common/session.cpp
+++ b/project2/common/session.cpp
@@ -23,6 +23,12 @@ Session::ExpiryTime() const
 	return expires;
 }
 
+bool
+Session::Empty() const
+{
+	return vars.empty();
+}
+
 VariableType
 Session::GetValue(const Glib::ustring & name) const
 {
diff --git a/project2/common/session.h b/project2/common/session.h
index 6aba83c..267dc51 100644
--- a/project2/common/session.h
+++ b/project2/common/session.h
@@ -24,6 +24,7 @@ class Session : public virtual IntrusivePtrBase {
 		void ForeachValue(const SVH &) const;
 		void SetValue(const Glib::ustring & name, const VariableType & value);
 		void ClearValue(const Glib::ustring & name);
+		bool Empty() const;
 		time_t ExpiryTime() const;
 
 		const UUID ID;
diff --git a/project2/common/sessionContainer.cpp b/project2/common/sessionContainer.cpp
index 82b7ca8..f4d7cd4 100644
--- a/project2/common/sessionContainer.cpp
+++ b/project2/common/sessionContainer.cpp
@@ -13,14 +13,11 @@ SessionContainer::~SessionContainer()
 SessionPtr
 SessionContainer::GetSession(const UUID & id) const
 {
-	SessionPtr s = getSession(id);
+	SessionPtr s;
+	if (id.is_nil() || !(s = getSession(id))) {
+		s = new Session(UUID::generate_random());
+	}
 	s->ExpiryTime(time(NULL) + Environment::getCurrent()->sessionTimeOut);
 	return s;
 }
 
-SessionPtr
-SessionContainer::newSession() const
-{
-	return new Session(UUID::generate_random());
-}
-
diff --git a/project2/common/sessionContainer.h b/project2/common/sessionContainer.h
index 1ee7689..ffbc5ed 100644
--- a/project2/common/sessionContainer.h
+++ b/project2/common/sessionContainer.h
@@ -15,7 +15,6 @@ class SessionContainer : public IntrusivePtrBase {
 
 	protected:
 		virtual SessionPtr getSession(const UUID & sid) const = 0;
-		SessionPtr newSession() const;
 };
 typedef boost::intrusive_ptr<SessionContainer> SessionContainerPtr;
 
diff --git a/project2/json/couchSession.cpp b/project2/json/couchSession.cpp
index c6a15c0..35650f2 100644
--- a/project2/json/couchSession.cpp
+++ b/project2/json/couchSession.cpp
@@ -32,7 +32,7 @@ class CouchSessionContainer : public SessionContainer {
 			}
 			catch (...) {
 			}
-			return newSession();
+			return NULL;
 		}
 
 		virtual void SaveSession(SessionPtr s) const {
diff --git a/project2/xml/sessionXml.cpp b/project2/xml/sessionXml.cpp
index 3fb925f..834c461 100644
--- a/project2/xml/sessionXml.cpp
+++ b/project2/xml/sessionXml.cpp
@@ -105,6 +105,6 @@ SessionContainerXml::getSession(const UUID & sid) const
 	}
 	catch (...) {
 	}
-	return newSession();
+	return NULL;
 }
 
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