MetaDefender Core V4 v4.19.2 ... 8. MetaDefender Core Developer Guide 8.1. MetaDefender API 8.1.3. Processing files 8.1.3.1. Process a file 8.1.3.2. Fetch processing result 8.1.3.3. Processing results 8.1.3.4. Cancel a file processing 8.1.3.5. Fetching available processing rules