accius
4 days ago
parent
f6ea975bad
commit
675c4c9495
@ -0,0 +1,22 @@
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FROM node:20-alpine
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WORKDIR /app
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# Copy package files
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COPY package*.json ./
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# Install dependencies
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RUN npm install --production
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# Copy source
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COPY server.js ./
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# Expose port
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EXPOSE 3001
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# Health check
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HEALTHCHECK --interval=30s --timeout=10s --start-period=10s --retries=3 \
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CMD wget --no-verbose --tries=1 --spider http://localhost:3001/health || exit 1
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# Start
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CMD ["node", "server.js"]
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@ -0,0 +1,189 @@
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# DX Spider Telnet Proxy
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A microservice that maintains a persistent telnet connection to DX Spider cluster nodes and exposes the spots via a simple HTTP REST API.
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## Why This Exists
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Many cloud hosting platforms (including Railway) don't support outbound telnet connections. This proxy service solves that by:
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1. Maintaining a persistent telnet connection to DX Spider
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2. Accumulating spots in memory (30-minute retention)
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3. Exposing spots via HTTP API that any app can consume
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## Features
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- **Auto-reconnect** - Automatically reconnects on disconnect
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- **Multi-node failover** - Cycles through multiple DX Spider nodes if one fails
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- **Keepalive** - Sends periodic keepalive to maintain connection
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- **Spot deduplication** - Prevents duplicate spots within 2-minute window
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- **30-minute retention** - Accumulates spots for richer data
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- **Mode detection** - Automatically detects CW, SSB, FT8, etc. from comments
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- **CORS enabled** - Can be called from any frontend
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## Environment Variables
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| Variable | Default | Description |
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|----------|---------|-------------|
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| `PORT` | 3001 | HTTP server port |
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| `CALLSIGN` | OPENHAMCLOCK | Callsign used for DX Spider login |
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## API Endpoints
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### `GET /health`
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Health check endpoint.
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```json
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{
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"status": "ok",
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"connected": true,
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"currentNode": "DX Spider UK",
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"spotsInMemory": 142,
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"totalSpotsReceived": 1847,
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"lastSpotTime": "2025-01-31T12:34:56.789Z",
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"connectionUptime": "3600s",
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"uptime": "7200s"
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}
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```
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### `GET /api/spots`
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Get accumulated spots with full details.
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Query parameters:
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- `limit` (default: 50, max: 200) - Number of spots to return
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- `since` (timestamp) - Only return spots after this timestamp
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```json
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{
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"spots": [
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{
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"spotter": "W3ABC",
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"freq": "14.025",
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"freqKhz": 14025,
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"call": "JA1XYZ",
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"comment": "CW 599",
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"time": "12:34z",
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"mode": "CW",
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"timestamp": 1706704496789,
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"source": "DX Spider"
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}
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],
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"total": 142,
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"connected": true,
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"source": "DX Spider UK",
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"timestamp": 1706704500000
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}
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```
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### `GET /api/dxcluster/spots`
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Get spots in simplified format (compatible with OpenHamClock).
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Query parameters:
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- `limit` (default: 25, max: 100)
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```json
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[
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{
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"spotter": "W3ABC",
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"freq": "14.025",
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"call": "JA1XYZ",
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"comment": "CW 599",
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"time": "12:34z",
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"mode": "CW",
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"source": "DX Spider Proxy"
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}
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]
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```
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### `GET /api/stats`
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Get statistics about spots.
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```json
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{
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"connected": true,
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"currentNode": "DX Spider UK",
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"totalSpots": 142,
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"totalReceived": 1847,
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"lastSpotTime": "2025-01-31T12:34:56.789Z",
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"retentionMinutes": 30,
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"bandCounts": {
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"20m": 45,
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"40m": 32,
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"15m": 28,
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"10m": 20
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},
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"modeCounts": {
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"FT8": 67,
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"CW": 35,
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"SSB": 25
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}
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}
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```
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### `GET /api/nodes`
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List available DX Spider nodes.
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```json
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{
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"nodes": [
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{ "index": 0, "name": "DX Spider UK", "host": "dxspider.co.uk", "port": 7300, "active": true },
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{ "index": 1, "name": "W6KK", "host": "w6kk.no-ip.org", "port": 7300, "active": false }
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],
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"currentIndex": 0
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}
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```
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### `POST /api/reconnect`
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Force reconnection to current node.
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### `POST /api/switch-node`
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Switch to a different node.
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```json
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{ "index": 1 }
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```
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## Deployment
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### Railway
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1. Create a new project in Railway
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2. Connect your GitHub repo or upload files
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3. Set environment variable: `CALLSIGN=YOURCALL`
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4. Deploy!
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The service will automatically start and connect to DX Spider.
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### Docker
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```bash
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docker build -t dxspider-proxy .
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docker run -p 3001:3001 -e CALLSIGN=YOURCALL dxspider-proxy
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```
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### Local Development
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```bash
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npm install
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CALLSIGN=YOURCALL npm start
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```
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## Using with OpenHamClock
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Once deployed, update your OpenHamClock configuration to use this proxy as a DX cluster source:
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```
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https://your-proxy-url.railway.app/api/dxcluster/spots
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```
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## DX Spider Nodes
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The proxy cycles through these nodes on failure:
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1. dxspider.co.uk:7300 (UK)
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2. w6kk.no-ip.org:7300 (California)
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3. dxc.nc7j.com:7373 (NC7J)
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4. dx.k3lr.com:7300 (K3LR)
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## License
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MIT
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{
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"name": "dxspider-proxy",
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"version": "1.0.0",
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"description": "DX Spider Telnet to HTTP Proxy - Maintains persistent telnet connection and serves spots via REST API",
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"main": "server.js",
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"scripts": {
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"start": "node server.js",
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"dev": "node server.js"
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},
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"keywords": [
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"ham-radio",
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"dx-cluster",
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"dxspider",
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"amateur-radio",
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"telnet-proxy"
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],
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"author": "OpenHamClock",
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"license": "MIT",
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"dependencies": {
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"cors": "^2.8.5",
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"express": "^4.18.2"
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},
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"engines": {
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"node": ">=18.0.0"
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}
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}
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[build]
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builder = "nixpacks"
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[deploy]
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startCommand = "node server.js"
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healthcheckPath = "/health"
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healthcheckTimeout = 30
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restartPolicyType = "always"
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/**
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* DX Spider Telnet Proxy Service
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*
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* A microservice that maintains a persistent telnet connection to DX Spider,
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* accumulates spots, and serves them via HTTP API.
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*
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* Designed to run on Railway as a standalone service.
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*/
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const net = require('net');
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const express = require('express');
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const cors = require('cors');
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const app = express();
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app.use(cors());
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app.use(express.json());
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// Configuration
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const CONFIG = {
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// DX Spider nodes to try (in order)
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nodes: [
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{ host: 'dxspider.co.uk', port: 7300, name: 'DX Spider UK' },
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{ host: 'w6kk.no-ip.org', port: 7300, name: 'W6KK' },
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{ host: 'dxc.nc7j.com', port: 7373, name: 'NC7J' },
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{ host: 'dx.k3lr.com', port: 7300, name: 'K3LR' }
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],
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callsign: process.env.CALLSIGN || 'OPENHAMCLOCK',
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spotRetentionMs: 30 * 60 * 1000, // 30 minutes
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reconnectDelayMs: 5000, // 5 seconds between reconnect attempts
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maxReconnectAttempts: 5,
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cleanupIntervalMs: 60000, // 1 minute
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keepAliveIntervalMs: 120000 // 2 minutes - send keepalive
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};
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// State
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let spots = [];
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let client = null;
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let connected = false;
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let currentNode = null;
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let currentNodeIndex = 0;
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let reconnectAttempts = 0;
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let lastSpotTime = null;
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let totalSpotsReceived = 0;
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let connectionStartTime = null;
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let buffer = '';
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let reconnectTimer = null;
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let keepAliveTimer = null;
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// Logging helper
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const log = (level, message, data = null) => {
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const timestamp = new Date().toISOString();
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const logLine = `[${timestamp}] [${level}] ${message}`;
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if (data) {
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console.log(logLine, typeof data === 'object' ? JSON.stringify(data) : data);
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} else {
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console.log(logLine);
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}
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};
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// Parse a DX spot line from telnet
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// Format: DX de SPOTTER: FREQ DXCALL comment time
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const parseSpotLine = (line) => {
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try {
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// Match: DX de W3ABC: 14025.0 JA1XYZ CW 599 1234Z
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const match = line.match(/^DX de\s+([A-Z0-9/]+):\s+(\d+\.?\d*)\s+([A-Z0-9/]+)\s+(.*)$/i);
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if (!match) return null;
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const spotter = match[1].toUpperCase();
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const freqKhz = parseFloat(match[2]);
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const dxCall = match[3].toUpperCase();
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let comment = match[4].trim();
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// Extract time from end of comment (format: 1234Z or 1234z)
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let time = '';
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const timeMatch = comment.match(/(\d{4})[Zz]\s*$/);
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if (timeMatch) {
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time = timeMatch[1].substring(0, 2) + ':' + timeMatch[1].substring(2, 4) + 'z';
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comment = comment.replace(/\d{4}[Zz]\s*$/, '').trim();
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} else {
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// Use current UTC time
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const now = new Date();
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time = String(now.getUTCHours()).padStart(2, '0') + ':' +
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String(now.getUTCMinutes()).padStart(2, '0') + 'z';
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}
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// Detect mode from comment
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let mode = null;
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const upperComment = comment.toUpperCase();
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if (upperComment.includes('FT8')) mode = 'FT8';
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else if (upperComment.includes('FT4')) mode = 'FT4';
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else if (upperComment.includes('CW')) mode = 'CW';
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else if (upperComment.includes('SSB') || upperComment.includes('USB') || upperComment.includes('LSB')) mode = 'SSB';
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else if (upperComment.includes('RTTY')) mode = 'RTTY';
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else if (upperComment.includes('PSK')) mode = 'PSK';
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else if (upperComment.includes('FM')) mode = 'FM';
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else if (upperComment.includes('AM')) mode = 'AM';
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return {
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spotter,
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freq: (freqKhz / 1000).toFixed(3), // Convert kHz to MHz string
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freqKhz,
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call: dxCall,
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comment,
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time,
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mode,
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timestamp: Date.now(),
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source: 'DX Spider'
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};
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} catch (err) {
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log('ERROR', 'Failed to parse spot line', { line, error: err.message });
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return null;
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}
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};
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// Add a spot to the accumulator
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const addSpot = (spot) => {
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if (!spot) return;
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// Check for duplicate (same call + freq within 2 minutes)
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const isDuplicate = spots.some(existing =>
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existing.call === spot.call &&
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existing.freq === spot.freq &&
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(spot.timestamp - existing.timestamp) < 120000
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);
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if (!isDuplicate) {
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spots.unshift(spot); // Add to beginning (newest first)
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totalSpotsReceived++;
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lastSpotTime = new Date();
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log('SPOT', `${spot.call} on ${spot.freq} MHz by ${spot.spotter}`);
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}
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};
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// Clean up old spots
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const cleanupSpots = () => {
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const cutoff = Date.now() - CONFIG.spotRetentionMs;
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const before = spots.length;
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spots = spots.filter(s => s.timestamp > cutoff);
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const removed = before - spots.length;
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if (removed > 0) {
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log('CLEANUP', `Removed ${removed} expired spots, ${spots.length} remaining`);
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}
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};
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// Connect to DX Spider
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const connect = () => {
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if (client) {
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try {
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client.destroy();
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} catch (e) {}
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client = null;
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}
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if (reconnectTimer) {
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clearTimeout(reconnectTimer);
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reconnectTimer = null;
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}
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const node = CONFIG.nodes[currentNodeIndex];
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currentNode = node;
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log('CONNECT', `Attempting connection to ${node.name} (${node.host}:${node.port})`);
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client = new net.Socket();
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client.setTimeout(30000);
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client.connect(node.port, node.host, () => {
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connected = true;
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reconnectAttempts = 0;
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connectionStartTime = new Date();
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buffer = '';
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log('CONNECT', `Connected to ${node.name}`);
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// Send login after short delay
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setTimeout(() => {
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if (client && connected) {
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client.write(CONFIG.callsign + '\r\n');
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log('AUTH', `Sent callsign: ${CONFIG.callsign}`);
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}
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}, 1000);
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// Start keepalive
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startKeepAlive();
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});
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client.on('data', (data) => {
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buffer += data.toString();
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// Process complete lines
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const lines = buffer.split('\n');
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buffer = lines.pop() || ''; // Keep incomplete line in buffer
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for (const line of lines) {
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const trimmed = line.trim();
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if (!trimmed) continue;
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// Check if it's a DX spot
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if (trimmed.startsWith('DX de ')) {
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const spot = parseSpotLine(trimmed);
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if (spot) {
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addSpot(spot);
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}
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}
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}
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});
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client.on('timeout', () => {
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log('TIMEOUT', 'Connection timed out');
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handleDisconnect();
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});
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client.on('error', (err) => {
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log('ERROR', `Connection error: ${err.message}`);
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handleDisconnect();
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});
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client.on('close', () => {
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log('CLOSE', 'Connection closed');
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handleDisconnect();
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});
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};
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// Start keepalive timer
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const startKeepAlive = () => {
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if (keepAliveTimer) {
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clearInterval(keepAliveTimer);
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}
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keepAliveTimer = setInterval(() => {
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if (client && connected) {
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try {
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// Send a harmless command to keep connection alive
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client.write('\r\n');
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log('KEEPALIVE', 'Sent keepalive');
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} catch (e) {
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log('ERROR', 'Keepalive failed', e.message);
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}
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}
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}, CONFIG.keepAliveIntervalMs);
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};
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// Handle disconnection and reconnection
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const handleDisconnect = () => {
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connected = false;
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if (keepAliveTimer) {
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clearInterval(keepAliveTimer);
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keepAliveTimer = null;
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}
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reconnectAttempts++;
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if (reconnectAttempts >= CONFIG.maxReconnectAttempts) {
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// Try next node
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currentNodeIndex = (currentNodeIndex + 1) % CONFIG.nodes.length;
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reconnectAttempts = 0;
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log('FAILOVER', `Switching to node: ${CONFIG.nodes[currentNodeIndex].name}`);
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}
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log('RECONNECT', `Attempting reconnect in ${CONFIG.reconnectDelayMs}ms (attempt ${reconnectAttempts + 1})`);
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reconnectTimer = setTimeout(() => {
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connect();
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}, CONFIG.reconnectDelayMs);
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};
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// ============================================
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// HTTP API ENDPOINTS
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// ============================================
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// Health check
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app.get('/health', (req, res) => {
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res.json({
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status: 'ok',
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connected,
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currentNode: currentNode?.name || 'none',
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spotsInMemory: spots.length,
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totalSpotsReceived,
|
||||
lastSpotTime: lastSpotTime?.toISOString() || null,
|
||||
connectionUptime: connectionStartTime ?
|
||||
Math.floor((Date.now() - connectionStartTime.getTime()) / 1000) + 's' : null,
|
||||
uptime: process.uptime() + 's'
|
||||
});
|
||||
});
|
||||
|
||||
// Get spots
|
||||
app.get('/api/spots', (req, res) => {
|
||||
const limit = Math.min(parseInt(req.query.limit) || 50, 200);
|
||||
const since = parseInt(req.query.since) || 0; // Timestamp filter
|
||||
|
||||
let filteredSpots = spots;
|
||||
|
||||
// Filter by timestamp if provided
|
||||
if (since > 0) {
|
||||
filteredSpots = spots.filter(s => s.timestamp > since);
|
||||
}
|
||||
|
||||
res.json({
|
||||
spots: filteredSpots.slice(0, limit),
|
||||
total: filteredSpots.length,
|
||||
connected,
|
||||
source: currentNode?.name || 'disconnected',
|
||||
timestamp: Date.now()
|
||||
});
|
||||
});
|
||||
|
||||
// Get spots in simple format (for compatibility with existing DX cluster endpoint)
|
||||
app.get('/api/dxcluster/spots', (req, res) => {
|
||||
const limit = Math.min(parseInt(req.query.limit) || 25, 100);
|
||||
|
||||
const formattedSpots = spots.slice(0, limit).map(s => ({
|
||||
spotter: s.spotter,
|
||||
freq: s.freq,
|
||||
call: s.call,
|
||||
comment: s.comment,
|
||||
time: s.time,
|
||||
mode: s.mode,
|
||||
source: 'DX Spider Proxy'
|
||||
}));
|
||||
|
||||
res.json(formattedSpots);
|
||||
});
|
||||
|
||||
// Stats endpoint
|
||||
app.get('/api/stats', (req, res) => {
|
||||
// Calculate spots per band
|
||||
const bandCounts = {};
|
||||
spots.forEach(s => {
|
||||
const freq = s.freqKhz;
|
||||
let band = 'other';
|
||||
if (freq >= 1800 && freq <= 2000) band = '160m';
|
||||
else if (freq >= 3500 && freq <= 4000) band = '80m';
|
||||
else if (freq >= 7000 && freq <= 7300) band = '40m';
|
||||
else if (freq >= 10100 && freq <= 10150) band = '30m';
|
||||
else if (freq >= 14000 && freq <= 14350) band = '20m';
|
||||
else if (freq >= 18068 && freq <= 18168) band = '17m';
|
||||
else if (freq >= 21000 && freq <= 21450) band = '15m';
|
||||
else if (freq >= 24890 && freq <= 24990) band = '12m';
|
||||
else if (freq >= 28000 && freq <= 29700) band = '10m';
|
||||
else if (freq >= 50000 && freq <= 54000) band = '6m';
|
||||
|
||||
bandCounts[band] = (bandCounts[band] || 0) + 1;
|
||||
});
|
||||
|
||||
// Calculate spots per mode
|
||||
const modeCounts = {};
|
||||
spots.forEach(s => {
|
||||
const mode = s.mode || 'unknown';
|
||||
modeCounts[mode] = (modeCounts[mode] || 0) + 1;
|
||||
});
|
||||
|
||||
res.json({
|
||||
connected,
|
||||
currentNode: currentNode?.name || 'none',
|
||||
totalSpots: spots.length,
|
||||
totalReceived: totalSpotsReceived,
|
||||
lastSpotTime: lastSpotTime?.toISOString() || null,
|
||||
retentionMinutes: CONFIG.spotRetentionMs / 60000,
|
||||
bandCounts,
|
||||
modeCounts
|
||||
});
|
||||
});
|
||||
|
||||
// Force reconnect
|
||||
app.post('/api/reconnect', (req, res) => {
|
||||
log('API', 'Force reconnect requested');
|
||||
handleDisconnect();
|
||||
res.json({ status: 'reconnecting' });
|
||||
});
|
||||
|
||||
// Switch node
|
||||
app.post('/api/switch-node', (req, res) => {
|
||||
const { index } = req.body;
|
||||
if (typeof index === 'number' && index >= 0 && index < CONFIG.nodes.length) {
|
||||
currentNodeIndex = index;
|
||||
reconnectAttempts = 0;
|
||||
log('API', `Switching to node index ${index}: ${CONFIG.nodes[index].name}`);
|
||||
handleDisconnect();
|
||||
res.json({ status: 'switching', node: CONFIG.nodes[index].name });
|
||||
} else {
|
||||
res.status(400).json({ error: 'Invalid node index', availableNodes: CONFIG.nodes.map(n => n.name) });
|
||||
}
|
||||
});
|
||||
|
||||
// List available nodes
|
||||
app.get('/api/nodes', (req, res) => {
|
||||
res.json({
|
||||
nodes: CONFIG.nodes.map((n, i) => ({
|
||||
index: i,
|
||||
name: n.name,
|
||||
host: n.host,
|
||||
port: n.port,
|
||||
active: i === currentNodeIndex
|
||||
})),
|
||||
currentIndex: currentNodeIndex
|
||||
});
|
||||
});
|
||||
|
||||
// ============================================
|
||||
// STARTUP
|
||||
// ============================================
|
||||
|
||||
const PORT = process.env.PORT || 3001;
|
||||
|
||||
// Start cleanup interval
|
||||
setInterval(cleanupSpots, CONFIG.cleanupIntervalMs);
|
||||
|
||||
// Start server
|
||||
app.listen(PORT, () => {
|
||||
log('START', `DX Spider Proxy listening on port ${PORT}`);
|
||||
log('CONFIG', `Callsign: ${CONFIG.callsign}`);
|
||||
log('CONFIG', `Spot retention: ${CONFIG.spotRetentionMs / 60000} minutes`);
|
||||
log('CONFIG', `Available nodes: ${CONFIG.nodes.map(n => n.name).join(', ')}`);
|
||||
|
||||
// Connect to DX Spider
|
||||
connect();
|
||||
});
|
||||
|
||||
// Handle graceful shutdown
|
||||
process.on('SIGTERM', () => {
|
||||
log('SHUTDOWN', 'Received SIGTERM, shutting down...');
|
||||
if (client) {
|
||||
client.destroy();
|
||||
}
|
||||
process.exit(0);
|
||||
});
|
||||
|
||||
process.on('SIGINT', () => {
|
||||
log('SHUTDOWN', 'Received SIGINT, shutting down...');
|
||||
if (client) {
|
||||
client.destroy();
|
||||
}
|
||||
process.exit(0);
|
||||
});
|
||||
Loading…
Reference in new issue