diff --git a/tools/post-log.py b/tools/post-log.py
index 4a187c2..3991fe7 100755
--- a/tools/post-log.py
+++ b/tools/post-log.py
@@ -51,6 +51,10 @@ if __name__ == "__main__":
     content = args.content
     hostname = get_hostname()
     uuid = get_uuid()
+    content=content.strip()
+    if not content:
+        print("error: empty log content")
+        exit(1)
     resp = post_log(url, hostname, uuid, content)
     if resp.status_code == 200:
         print("200 ok")