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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"structured logging fails to create valid json in some cases","articleBody":"I think I found a bug in v3.0.0 branch, causing invalid json being generated, thus having no jsonPayload in GCP Logging and instead receiving a textMessage.\r\n\r\n#### Environment details\r\n\r\n  - code deployed on GCP Cloud Run\r\n  - using library version from v3.0.0 branch\r\n \r\n#### Steps to reproduce\r\n\r\n1. use structured logging according to examples\r\n2. log any dict with double ending braces ( '{ \"x\": { \"y\" : \"z\" }}')\r\n3. see https://github.com/googleapis/python-logging/blob/3d03805ff9ab7cdf16c41f67a7453b2d8f5c70ce/google/cloud/logging_v2/handlers/structured_log.py#L69 using lstrip and rstrip, causing removal of both braces at the end\r\n4. receive textMessage instead of jsonPayload in GCP Logging, as invalid json was produced.\r\n\r\n#### Possible fix\r\n\r\nI am not a python programmer, so you might find better solutions, however, this is what worked for me:\r\n```\r\nif isinstance(record.msg, collections.abc.Mapping):\r\n    encoded_msg = json.dumps(record.msg, ensure_ascii=False)\r\n    payload_clean = encoded_msg.lstrip().rstrip() // remove whitespace\r\n    # strip out open and close parentheses\r\n    if payload_clean.startswith(\"{\"):\r\n        payload_clean = payload_clean[1:] // strip leftmost character\r\n    if payload_clean.endswith(\"}\"):\r\n        payload_clean = payload_clean[:-1] // strip rightmost character\r\n    payload = payload_clean + \",\"\r\n```\r\n\r\nThanks a lot for bringing structured (json) logging into the lib!","author":{"url":"https://github.com/EricLacherSolera","@type":"Person","name":"EricLacherSolera"},"datePublished":"2021-06-21T11:03:16.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":1},"url":"https://github.com/331/python-logging/issues/331"}