HTML/XML parser and web scraper for NodeJS.
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Uses native libxml C bindings
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Clean promise-like interface
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Supports CSS 3.0 and XPath 1.0 selector hybrids
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No large dependencies like jQuery, cheerio, or jsdom
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Compose deep and complex data structures
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HTML parser features
- Fast parsing
- Very fast searching
- Small memory footprint
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HTML DOM features
- Load and search ajax content
- DOM interaction and events
- Execute embedded and remote scripts
- Execute code in the DOM
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HTTP request features
- Logs urls, redirects, and errors
- Cookie jar and custom cookies/headers/user agent
- Login/form submission, session cookies, and basic auth
- Single proxy or multiple proxies and handles proxy failure
- Retries and redirect limits
var osmosis = require('osmosis'); osmosis .get('www.craigslist.org/about/sites') .find('h1 + div a') .set('location') .follow('@href') .find('header + div + div li > a') .set('category') .follow('@href') .paginate('.totallink + a.button.next:first') .find('p > a') .follow('@href') .set({ 'title': 'section > h2', 'description': '#postingbody', 'subcategory': 'div.breadbox > span[4]', 'date': 'time@datetime', 'latitude': '#map@data-latitude', 'longitude': '#map@data-longitude', 'images': ['img@src'] }) .data(function(listing) { // do something with listing data }) .log(console.log) .error(console.log) .debug(console.log)For documentation and examples check out https://rchipka.github.io/node-osmosis/global.html
- libxmljs-dom - DOM wrapper for libxmljs C bindings
- needle - Lightweight HTTP wrapper
Please consider a donation if you depend on web scraping and Osmosis makes your job a bit easier. Your contribution allows me to spend more time making this the best web scraper for Node.

