From b8c25ae2beb7ab2237ee7378baf38a25680dde1f Mon Sep 17 00:00:00 2001
From: Bastian Dehn <hhaalo@arcor.de>
Date: Fri, 1 Mar 2024 17:49:32 +0100
Subject: [PATCH] add recreate session when empty paper

---
 src/kds_s2000w_debug.h   |  2 +-
 src/kds_s2000w_handler.c | 25 +++++++++++++++++++++++--
 src/kds_s2000w_handler.h |  1 +
 src/kds_s2000w_net.c     |  6 +++++-
 4 files changed, 30 insertions(+), 4 deletions(-)

diff --git a/src/kds_s2000w_debug.h b/src/kds_s2000w_debug.h
index 03b00a6..f535ead 100644
--- a/src/kds_s2000w_debug.h
+++ b/src/kds_s2000w_debug.h
@@ -9,7 +9,7 @@
 #define DEBUG 5
 #define ALL 6
 
-#define LOGLEVEL DEBUG
+#define LOGLEVEL INFO
 
 void debug_printf(int level, const char* message);
 void debug_printf_int(int level, const char* message, int value);
diff --git a/src/kds_s2000w_handler.c b/src/kds_s2000w_handler.c
index ea40b28..a618689 100644
--- a/src/kds_s2000w_handler.c
+++ b/src/kds_s2000w_handler.c
@@ -231,6 +231,28 @@ void reset_handler(handler* h)
 	h->read_info->readed_lines = 0;
 }
 
+void kds_s2000w_handler_recreate_session(handler* h)
+{
+	kds_s2000w_client_close_session(h->sessionid);
+	response* resp = kds_s2000w_client_response_init();
+	kds_s2000w_client_open_session("hhaalo", resp);
+
+	if (resp->code == 200) {
+		json_object* resp_config = json_tokener_parse(resp->data);
+		json_object* value_object = NULL;
+		json_object_object_get_ex(resp_config, "SessionId", &value_object);
+		h->sessionid = json_object_get_int64(value_object);
+		h->state = OPENED;
+		value_object = NULL;
+		json_object_put(resp_config);
+		resp_config = NULL;
+		debug_printf_long(INFO, "SessionId", h->sessionid);
+	}
+
+	kds_s2000w_client_response_free(resp);
+	resp = NULL;
+}
+
 void kds_s2000w_handler_open(const char* devicename, void** handle)
 {
 	debug_printf(ALL, "kds_s2000w_handler_open");
@@ -275,6 +297,7 @@ void kds_s2000w_handler_open(const char* devicename, void** handle)
 		json_object_object_get_ex(resp_config, "SessionId", &value_object);
 		h->sessionid = json_object_get_int64(value_object);
 		h->state = OPENED;
+		debug_printf_long(INFO, "SessionId", h->sessionid);
 		value_object = NULL;
 	}
 
@@ -282,8 +305,6 @@ void kds_s2000w_handler_open(const char* devicename, void** handle)
 	resp_config = NULL;
 	kds_s2000w_client_response_free(resp);
 	resp = NULL;
-
-	return;
 }
 
 void kds_s2000w_handler_close(handler* h)
diff --git a/src/kds_s2000w_handler.h b/src/kds_s2000w_handler.h
index 67de78c..fd50111 100644
--- a/src/kds_s2000w_handler.h
+++ b/src/kds_s2000w_handler.h
@@ -51,6 +51,7 @@ typedef struct {
 handler* init_handler();
 void free_handler(handler* h);
 void reset_handler(handler* h);
+void kds_s2000w_handler_recreate_session(handler* h);
 void kds_s2000w_handler_open(const char* devicename, void** handle);
 void kds_s2000w_handler_close(handler* h);
 void kds_s2000w_handler_get_option(handler* handle, int option, void* value, int* info);
diff --git a/src/kds_s2000w_net.c b/src/kds_s2000w_net.c
index 477c442..ab86c85 100644
--- a/src/kds_s2000w_net.c
+++ b/src/kds_s2000w_net.c
@@ -82,7 +82,6 @@ SANE_Status _sane_kds_s2000w_net_open(SANE_String_Const devicename,
 	if (h->state == NOTCONNECTED)
 		return SANE_STATUS_IO_ERROR;
 
-	debug_printf_long(INFO, "SessionId", h->sessionid);
 	return SANE_STATUS_GOOD;
 }
 
@@ -185,6 +184,11 @@ SANE_Status _sane_kds_s2000w_net_start(SANE_Handle handle)
 			break;
 	}
 
+	if (h->current_metadata->valid == 0) {
+		kds_s2000w_handler_recreate_session(h);
+		return SANE_STATUS_NO_DOCS;
+	}
+
 	if (h->current_scan_status->complete_scanned)
 		kds_s2000w_handler_stop_scan(h);
 
-- 
2.39.5