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node-crawlervsgerapy

MIT 34 5 6,609
39.9 thousand (month) Sep 10 2012 1.5.0(3 months ago)
3,199 4 64 MIT
0.9.13(8 months ago) Jul 04 2017 545 (month)

node-crawler is a popular web scraping library for Node.js that allows you to easily navigate and extract data from websites. It has a simple API and supports concurrency, making it efficient for scraping large numbers of pages.

Features:

  • Server-side DOM & automatic jQuery insertion with Cheerio (default) or JSDOM,
  • Configurable pool size and retries,
  • Control rate limit,
  • Priority queue of requests,
  • forceUTF8 mode to let crawler deal for you with charset detection and conversion,
  • Compatible with 4.x or newer version.
  • Http2 support
  • Proxy support

Gerapy is a Distributed Crawler Management Framework Based on Scrapy, Scrapyd, Scrapyd-Client, Scrapyd-API, Django and Vue.js.

It is built on top of the Scrapy framework and provides a simple and easy-to-use interface for performing web scraping tasks. Gerapy also includes features such as support for scheduling and distributed crawling, as well as a built-in web-based dashboard for monitoring and managing scraping tasks. Additionally, Gerapy is designed to be highly extensible, allowing users to easily create custom plugins and integrations.

Overall, Gerapy is a useful tool for those looking to automate web scraping tasks and extract data from websites.

Example Use


const Crawler = require('crawler');

const c = new Crawler({
    maxConnections: 10,
    // This will be called for each crawled page
    callback: (error, res, done) => {
        if (error) {
            console.log(error);
        } else {
            const $ = res.$;
            // $ is Cheerio by default
            //a lean implementation of core jQuery designed specifically for the server
            console.log($('title').text());
        }
        done();
    }
});

// Queue just one URL, with default callback
c.queue('http://www.amazon.com');

// Queue a list of URLs
c.queue(['http://www.google.com/','http://www.yahoo.com']);

// Queue URLs with custom callbacks & parameters
c.queue([{
    uri: 'http://parishackers.org/',
    jQuery: false,

    // The global callback won't be called
    callback: (error, res, done) => {
        if (error) {
            console.log(error);
        } else {
            console.log('Grabbed', res.body.length, 'bytes');
        }
        done();
    }
}]);

// Queue some HTML code directly without grabbing (mostly for tests)
c.queue([{
    html: '<p>This is a <strong>test</strong></p>'
}]);

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