Island: Add PyWSGILoggingFilter

monkey/monkey_island/cc/setup/__init__.py

@@ -0,0 +1 @@
+from .pywsgi_logging_filter import PyWSGILoggingFilter

monkey/monkey_island/cc/setup/pywsgi_logging_filter.py

@@ -0,0 +1,26 @@
+import re
+from logging import Filter, LogRecord
+
+
+class PyWSGILoggingFilter(Filter):
+    """
+    Remove the superfluous timestamp that gevent.pywsgi.WSGIServer inserts into its log messages
+
+    The WSGIServer.format_request() hard-codes its own log format. This filter modifies the log
+    message and removes the superfluous timestamp.
+
+    See https://github.com/guardicore/monkey/issues/2059 for more information.
+    """
+
+    TIMESTAMP_REGEX = re.compile(r"- - \[\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}\]")
+
+    def filter(self, record: LogRecord) -> bool:
+        """
+        Remove the superfluous timestamp in gevent.pywsgi.WSGIServer log messages
+
+        :param LogRecord: A log record to modify
+        :return: True
+        """
+
+        record.msg = PyWSGILoggingFilter.TIMESTAMP_REGEX.sub("-", record.msg)
+        return True