LPS Crawler Desktop

A comprehensive web scraping and media extraction tool featuring a desktop GUI. It provides advanced crawling capabilities and media extraction for text, images, video, audio, and documents.

Core Features

📝 TextExtractor - Text & Metadata

• Readability Analysis - Calculates Flesch-Kincaid scores and reading time.
• Content Filtering - Removes noise like ads, navigation, and footers.
• Metadata - Extracts JSON-LD, OpenGraph, Twitter Cards, and Dublin Core data.
• Markdown Export - Converts HTML to clean markdown, preserving tables and code blocks.
• Code Detection - Identifies programming languages in code blocks.
• Quality Metrics - Analyzes content quality based on word count and structure.

🖼️ MFTExtractor - Image Extraction

• Dynamic Content - Handles lazy-loading and infinite scroll automatically.
• Network Capture - Intercepts image requests (XHR/Fetch) alongside DOM scanning.
• Format Support - Extracts SVGs, canvas content, srcset, and responsive picture elements.
• Smart Filtering - Filters images by size and type; categorizes into heroes, thumbnails, icons, etc.

🎬 TBRExtractor - Video Extraction

• Streaming Support - Detects HLS (.m3u8), DASH (.mpd), and MSS streams.
• Start-of-the-Art Players - Integrates with Video.js, HLS.js, Shaka, JW Player, Plyr, etc.
• Deep Scanning - Scans Shadow DOM and iframes for embedded players.
• Asset Extraction - Captures subtitles (VTT/SRT), audio tracks, and thumbnails.
• Platform Support - Detects embedded videos from YouTube, Vimeo, Twitch, and more.

🔊 AudioExtractor - Audio Extraction

• Streaming Audio - Supports HLS/DASH audio streams.
• Player Monitoring - Monitors AudioContext and HTMLAudioElement activity.
• Podcasts & Music - Detects RSS feeds and embedded players (SoundCloud, Spotify, etc.).
• Formats - Supports MP3, OGG, WAV, FLAC, M4A, AAC, and OPUS.

📑 PDFExtractor - Document Extraction

• Formats - Extracts PDF, Word, Excel, PowerPoint, and eBook formats.
• Cloud Viewers - Detects documents in Google Docs, OneDrive, SharePoint, and Dropbox viewers.
• Embedded Viewers - handling for PDF.js and canvas-based viewers.

🔄 Universal Extractor

• Single-Pass Extraction - Runs all extractors in a single browser session for efficiency.
• Resource Management - Optimizes memory and CPU usage during comprehensive scans.

Installation

cd lps-crawler-desktop
npm install
# Ensures all dependencies including Electron and Puppeteer are ready

Usage

Desktop Application

Run the full GUI application:

npm start
# or
node start-desktop.js

Web Interface

Run only the web server (accessible via browser):

node serve-gui.js
# Open http://localhost:3001

Programmatic API

const { 
  createTextExtractor,
  createMFTExtractor,
  createTBRExtractor,
  createUniversalExtractor
} = require('./src');

// Extract all media types from a URL
const universal = await createUniversalExtractor({
  extract: { text: true, images: true, video: true, audio: true, documents: true }
});
const result = await universal.run('https://example.com');
console.log(`Found ${result.summary.counts.images} images`);

Project Structure

├── start-desktop.js     # Desktop launcher
├── desktop/main.js      # Electron main process
├── serve-gui.js         # GUI server
├── index.html           # GUI interface
└── src/
    ├── index.js              # Factory exports
    ├── BrowserInterface.js   # Puppeteer wrapper
    ├── LPSCrawler.js         # Core crawler logic
    ├── extractors/           # Specialized extractors
    │   ├── TextExtractor.js
    │   ├── MFTExtractor.js
    │   ├── TBRExtractor.js
    │   ├── AudioExtractor.js
    │   ├── PDFExtractor.js
    │   └── UniversalExtractor.js
    └── utils/
        ├── mathUtils.js      # Rigorous math functions
        ├── mediaDownloader.js
        └── rateLimiter.js

License

Apache License 2.0 - see the LICENSE file for details.