This extension adds a custom editor for FlowFile v3 documents and opens *.flowfile and *.flowfile-v3 files in a structured editor instead of plain text.
It also features a command for creating FlowFile v3
FlowFile v3 binary format support
The editor now uses a real FlowFile v3 binary stream model based on NiFiFF3 packaging:
Each record starts with ASCII magic header: NiFiFF3
Then attribute count (length encoded)
Then repeated attribute key/value strings (each length encoded)
Then 8-byte content length (big-endian)
Then content bytes
Multiple records can be concatenated in one file and are fully supported in the UI
Length encoding uses:
2-byte unsigned length when value is < 65535
0xFFFF marker followed by 4-byte unsigned length for larger values
UI behavior and assumptions
The custom editor lets you add/remove/select multiple records in one file.
Each record supports editing attributes.
Record content is preserved as raw bytes and is not decoded into UTF-8 text in the editor.
Use the Open Content button to open the selected record content in a separate editor tab (written to a temporary file).
Development
npm install
npm run compile
npm run lint
npm test
npx @vscode/vsce package --no-dependencies
TODO
Add actual light and dark mode icons
Move to using actual files in package.json instead of .vscode ignore
