A web application and API for checking SSL certificate information using Deno's built-in TLS connection capabilities.

• Web interface for checking SSL certificates
• REST API endpoints for programmatic access
• Clean, responsive UI built with Hono JSX
• Modular architecture with separated concerns

├── index.ts          # Main Hono application with routes
├── ssl-checker.ts    # SSL checking logic and types
├── templates.tsx     # Hono JSX templates and components
└── README.md         # This file

• GET / - Main web interface

• GET /check?url=<url> - Check SSL certificate (JSON response)
• POST /check - Check SSL certificate
  • Form data: url=<url>
  • JSON: {"url": "<url>"}

Visit the root URL to use the interactive form.

GET Request:

curl "https://your-val.web.val.run/check?url=https://google.com"

POST Request (JSON):

curl -X POST "https://your-val.web.val.run/check" \
  -H "Content-Type: application/json" \
  -d '{"url": "https://google.com"}'

POST Request (Form):

curl -X POST "https://your-val.web.val.run/check" \
  -d "url=https://google.com"

{
  "url": "https://google.com/",
  "hostname": "google.com",
  "port": 443,
  "alpnProtocol": null
}

Contains the core SSL checking functionality:

• checkSSL(url: string) - Main function to check SSL certificates
• SSLInfo interface - TypeScript type definitions

Hono JSX components for the web interface:

• Layout - Base HTML layout component
• HomePage - Main page with form
• ResultsPage - SSL check results display

Main Hono application with:

• Route handlers for web and API endpoints
• Error handling
• Content-type detection for JSON vs form responses

The application includes comprehensive error handling:

• Invalid URLs are caught and reported
• Network errors are handled gracefully
• Different error responses for web vs API requests