A Cloudflare Worker that fetches and displays the DBMF (Dynamic Beta-Managed Futures Strategy Fund) holdings data from an Excel file as a beautiful, responsive HTML table.

• 📥 Automatically fetches the latest DBMF holdings Excel file
• 📊 Converts Excel data to a clean, responsive HTML table
• 🎨 Modern, gradient-styled UI with mobile support
• ⚡ Fast edge-side rendering via Cloudflare Workers
• 💾 5-minute cache for optimal performance

• Node.js (v16 or later)
• npm or yarn
• A Cloudflare account
• Wrangler CLI

1. Clone this repository and navigate to the project directory:

   cd dbmfview

2. Install dependencies:

   npm install

3. Authenticate with Cloudflare (if you haven't already):

   npx wrangler login

To run the worker locally for development:

npm run dev

This will start a local server (usually at http://localhost:8787) where you can test the worker.

Deploy the worker to Cloudflare:

npm run deploy

After deployment, Wrangler will provide you with a URL where your worker is accessible (e.g., https://dbmfview.your-subdomain.workers.dev).

If you want to use a custom domain or route, edit wrangler.toml:

routes = [
  { pattern = "example.com/dbmf", zone_name = "example.com" }
]

If the source URL changes, update the EXCEL_URL constant in src/index.js:

const EXCEL_URL = 'https://imgpfunds.com/wp-content/uploads/pdfs/holdings/DBMF-Holdings.xlsx';

To change how long the data is cached, modify the Cache-Control header in src/index.js:

'Cache-Control': 'public, max-age=300', // 300 seconds = 5 minutes

dbmfview/
├── src/
│   └── index.js          # Main worker script
├── package.json          # Dependencies and scripts
├── wrangler.toml         # Cloudflare Worker configuration
└── README.md            # This file

1. The worker receives an HTTP request
2. It fetches the Excel file from the specified URL
3. The xlsx library parses the Excel data
4. The data is converted to an HTML table
5. A styled HTML page is generated and returned to the browser
6. The response is cached for 5 minutes to reduce load on the source server

• xlsx (^0.18.5): Library for parsing and writing Excel files
• wrangler (^3.0.0): Cloudflare Workers CLI tool (dev dependency)

• Verify the URL is accessible: curl -I https://imgpfunds.com/wp-content/uploads/pdfs/holdings/DBMF-Holdings.xlsx
• Check if the source server is blocking Cloudflare Workers
• Review worker logs: npx wrangler tail

• Ensure the file format is valid (.xlsx)
• Check if the file structure has changed
• Look for error messages in the browser or worker logs

• Make sure you're authenticated: npx wrangler whoami
• Check your Cloudflare account has Workers enabled
• Verify your wrangler.toml configuration is correct

MIT

Data is sourced from: DBMF Holdings Excel File