nodel-use（节点使用）

Interacting with Running Nodel Instances

Quick Reference

Default Base URL: http://localhost:8085

# List all nodes
curl http://localhost:8085/REST/nodes

# Get node console logs
curl "http://localhost:8085/REST/nodes/My%20Node/console?from=0&max=50"

# Invoke an action
curl -X POST "http://localhost:8085/REST/nodes/My%20Node/actions/Power/call" \
  -H "Content-Type: application/json" -d '{"arg":"On"}'

Important: URL-encode node names with spaces (%20). See references/rest-api.md for all endpoints.

REST API Endpoints

See references/rest-api.md for complete endpoint reference.

Host-Level Endpoints

Node-Level Endpoints

Base: /REST/nodes/{nodeName}/

Debugging Workflows

Check Node Health

# 1. Get console output
curl "http://localhost:8085/REST/nodes/My%20Node/console?from=0&max=100"

# 2. Look for error patterns in response
# Console levels: info (blue), out (gray), warn (orange), err (red)

# 3. Check action/event activity
curl "http://localhost:8085/REST/nodes/My%20Node/logs?from=0&max=50"

# 4. Inspect current parameters
curl http://localhost:8085/REST/nodes/My%20Node/params

Live Log Tailing (Long-Polling)

# Initial fetch - note the highest 'seq' value in response
curl "http://localhost:8085/REST/nodes/My%20Node/console?from=0&max=50"

# Poll for new logs (waits up to 5 seconds)
curl "http://localhost:8085/REST/nodes/My%20Node/console?from=12345&max=50&timeout=5000"

Response format:

[
  {"seq": 12346, "timestamp": "2024-01-15T10:30:00", "console": "info", "comment": "Connected"},
  {"seq": 12347, "timestamp": "2024-01-15T10:30:01", "console": "err", "comment": "Error message"}
]

Inspect and Test Actions

# List available actions
curl http://localhost:8085/REST/nodes/My%20Node/actions

# Test action - string argument
curl -X POST "http://localhost:8085/REST/nodes/My%20Node/actions/Power/call" \
  -H "Content-Type: application/json" -d '{"arg":"On"}'

See references/debugging.md for complete debugging workflows.

Evaluate Python Expressions

# Check variable value
curl "http://localhost:8085/REST/nodes/My%20Node/eval?expr=param_ipAddress"

# Check connection state (requires _isConnected variable set by TCP callbacks)
curl "http://localhost:8085/REST/nodes/My%20Node/eval?expr=_isConnected"

# Execute diagnostic code
curl -X POST "http://localhost:8085/REST/nodes/My%20Node/exec" \
  -H "Content-Type: application/json" \
  -d '{"code":"console.info(\"Connection state: %s\" % _isConnected)"}'

Common Issues

Node Not Responding

1. Check if node exists: curl http://localhost:8085/REST/nodes
2. Check console for startup errors
3. Verify parameters are configured
4. Check network connectivity to device

Action Not Working

1. Check action exists: curl.../actions
2. Verify argument format matches schema
3. Check console for errors after calling
4. Test with simple action first (Refresh, Status)

Connection Issues

1. Use /eval to check connection state
2. Look for "disconnected" in console logs
3. Verify IP/port parameters
4. Test network connectivity from Nodel host

Node Management

Create Node from Recipe

# List recipes (returns objects with 'path', 'modified', etc.)
curl http://localhost:8085/REST/recipes/list

# Create node from a recipe path
curl -X POST "http://localhost:8085/REST/newNode?base=nodel-official-recipes/PJLink" \
  -H "Content-Type: application/json" \
  -d '{"value":"New Node"}'

Update Node Parameters

# Get current values
curl http://localhost:8085/REST/nodes/My%20Node/params

# Save new values
curl -X POST "http://localhost:8085/REST/nodes/My%20Node/params/save" \
  -H "Content-Type: application/json" \
  -d '{"ipAddress": "192.168.1.100", "port": 9999}'

Restart/Rename/Delete

# Restart
curl -X POST "http://localhost:8085/REST/nodes/My%20Node/restart" \
  -H "Content-Type: application/json" \
  -d '{}'

# Rename
curl -X POST "http://localhost:8085/REST/nodes/My%20Node/rename?newName=New%20Name" \
  -H "Content-Type: application/json" \
  -d '{}'

# Delete (requires confirmation)
curl -X POST "http://localhost:8085/REST/nodes/My%20Node/remove?confirm=true" \
  -H "Content-Type: application/json" \
  -d '{}'

Tips

1. URL-encode node names - Spaces become %20
2. Use ?trace for debugging - Adds stack traces to error responses
3. POST payloads - Send JSON for POST endpoints (-d '{}' if no explicit payload)
4. Long-poll timeout - Use 5000-10000ms for log tailing
5. Check restart completion - Use /hasRestarted?timestamp={before}&timeout=5000