link-view/README.md

A Node.js package to generate link previews from URLs

# Link Preview 


A powerful Node.js package that generates rich link previews by extracting comprehensive metadata from any URL. Perfect for social media apps, messaging platforms, and content aggregators.

## ✨ Features

- **🚀 High Performance** - Optimized for speed with intelligent caching
- **🔍 Deep Extraction** - Pulls titles, descriptions, images, favicons, and more
- **💪 Robust Handling** - Works reliably with e-commerce sites, blogs, and media platforms
- **⚡ Async Support** - Modern Promise-based API
- **🛡️ Error Resilience** - Graceful fallbacks and comprehensive error handling
- **🧩 Easily Extensible** - Customize extraction rules for specific sites

## 📦 Installation

```bash
npm install link-view
```

## 🚀 Quick Start

```javascript
const { generateLinkPreview } = require('link-view');

// Basic usage
generateLinkPreview('https://www.example.com')
  .then(preview => console.log(preview))
  .catch(error => console.error('Error:', error.message));

// With async/await
async function getPreview() {
  try {
    const preview = await generateLinkPreview('https://www.example.com');
    console.log(preview);
  } catch (error) {
    console.error('Error:', error.message);
  }
}
```

## 📋 Response Format

The package returns a promise that resolves to an object with the following properties:

```javascript
{
  url: 'https://example.com',                      // The canonical URL
  title: 'Example Domain',                         // Page title
  description: 'This domain is for illustrative...', // Page description
  image: 'https://example.com/image.jpg',          // Primary image URL
  favicon: 'https://example.com/favicon.ico',      // Favicon URL
  domain: 'example.com',                          // Domain name (without www)
  author: 'Example Author'                         // Content author (if available)
```

The package includes special handling for popular platforms:

```javascript
// E-commerce sites
generateLinkPreview('https://www.amazon.com/product/...')
  .then(preview => console.log(preview));

// News sites
generateLinkPreview('https://www.nytimes.com/2023/...')
  .then(preview => console.log(preview));
```

## 🛠️ Examples

### Integration with Express.js

```javascript
const express = require('express');
const { generateLinkPreview } = require('link-view');

const app = express();
app.use(express.json());

app.post('/api/preview', async (req, res) => {
  try {
    const { url } = req.body;
    if (!url) {
      return res.status(400).json({ error: 'URL is required' });
    }
    
    const preview = await generateLinkPreview(url);
    res.json(preview);
  } catch (error) {
    res.status(500).json({ error: error.message });
  }
});

app.listen(3000, () => {
  console.log('Server running on port 3000');
});
```

## 📊 Performance

The package is optimized for performance:

- Intelligent caching reduces repeat requests
- Resource filtering minimizes bandwidth usage
- Parallel processing for faster extraction
- Memory-efficient operations for large scale applications

Made with ❤️ by [Shajmil VJ]