Bug: MinIO webhook returns 400 - Missing contentType in payload

Environment

• Deployment: Docker Compose
• Version: latest (lasuite/meet-backend:latest)
• MinIO version: RELEASE.2025-09-07T16-13-09Z

Description

The MinIO webhook integration for recordings fails with 400 Bad Request because the MinioParser expects a contentType field that MinIO doesn't always send in webhook payloads.

Configuration

# env.d/common
RECORDING_ENABLE=True
RECORDING_STORAGE_EVENT_ENABLE=True
RECORDING_ENABLE_STORAGE_EVENT_AUTH=False
RECORDING_EVENT_PARSER_CLASS=core.recording.event.parsers.MinioParser

Error

ParsingEventDataError: "Missing or malformed key: 'contentType'."

Root Cause

In core/recording/event/parsers.py, line ~95:

filetype = file_object["contentType"]  # This key is not always present

MinIO webhook payloads don't always include contentType, especially for programmatically uploaded files.

Proposed Solution

Make contentType optional and infer from file extension:

if "contentType" in file_object:
    filetype = file_object["contentType"]
else:
    # Infer from extension
    if filepath.endswith('.mp4'):
        filetype = "video/mp4"
    elif filepath.endswith('.ogg'):
        filetype = "audio/ogg"

Workaround

Created a custom parser that handles missing contentType.