openID is the king of each session , should be elivated to a position that is very important.

server.go

@@ -69,9 +69,8 @@ func answerWechatPost(w http.ResponseWriter, r *http.Request) {
 	if !valid {
 		log.Println("Error:  Invalid Input ")
 	}
-
-	//are we in an existing procedure
 	openID := in.header.FromUserName
+	//are we in an existing procedure
 	inProc, state := isInProc(openID) //if inside a procedure, resume last saved state
 	if inProc {
 		state = serveProc(state, in) //transit to new state
@@ -89,11 +88,15 @@ func answerWechatPost(w http.ResponseWriter, r *http.Request) {
 	w.Header().Set("Content-Type", "text/xml; charset=utf-8")
 	fmt.Fprint(w, reply)
 
-	err := saveChatState(openID, state.Procedure, state)
-	if err != nil {
-		log.Println("Error Cannot Save chat sate")
-		log.Println(err)
-		log.Println(state)
+	if !isEndingState(state) {
+		err := saveChatState(openID, state.Procedure, state)
+		if err != nil {
+			log.Println("Error Cannot Save chat sate")
+			log.Println(err)
+			log.Println(state)
+		}
+	} else { //state ending
+		cleanProcedure(openID, state.Procedure)
 	}
 	return
 }