1 files changed, 33 insertions, 0 deletions
diff --git a/testing/web-platform/tests/tools/third_party/websockets/example/logging/json_log_formatter.py b/testing/web-platform/tests/tools/third_party/websockets/example/logging/json_log_formatter.py
new file mode 100644
index 0000000000..b8fc8d6dc9
--- /dev/null
+++ b/testing/web-platform/tests/tools/third_party/websockets/example/logging/json_log_formatter.py
@@ -0,0 +1,33 @@
+import json
+import logging
+import datetime
+
+class JSONFormatter(logging.Formatter):
+    """
+    Render logs as JSON.
+
+    To add details to a log record, store them in a ``event_data``
+    custom attribute. This dict is merged into the event.
+
+    """
+    def __init__(self):
+        pass  # override logging.Formatter constructor
+
+    def format(self, record):
+        event = {
+            "timestamp": self.getTimestamp(record.created),
+            "message": record.getMessage(),
+            "level": record.levelname,
+            "logger": record.name,
+        }
+        event_data = getattr(record, "event_data", None)
+        if event_data:
+            event.update(event_data)
+        if record.exc_info:
+            event["exc_info"] = self.formatException(record.exc_info)
+        if record.stack_info:
+            event["stack_info"] = self.formatStack(record.stack_info)
+        return json.dumps(event)
+
+    def getTimestamp(self, created):
+        return datetime.datetime.utcfromtimestamp(created).isoformat()