Keep scanner probes and dropped connections out of the sync log.

sync/pitlog_sync.py

@@ -355,6 +355,22 @@ def sync_body(payload, db=None):
 class Handler(BaseHTTPRequestHandler):
     protocol_version = "HTTP/1.1"
 
+    def handle(self):
+        try:
+            super().handle()
+        except (ConnectionError, TimeoutError):
+            return
+
+    def send_error(self, code, message=None, explain=None):
+        try:
+            self.close_connection = True
+            self.send_response_only(code)
+            self.send_header("Content-Length", "0")
+            self.send_header("Connection", "close")
+            self.end_headers()
+        except (ConnectionError, TimeoutError):
+            self.close_connection = True
+
     def log_message(self, fmt, *args):
         sys.stdout.write("%s - %s\n" % (self.address_string(), fmt % args))