node-simple-crawler

Simple web-crawler for node.js

Installation

Using npm:

$ npm install node-simple-crawler --save

Usage

var Crawler = require('node-simple-crawler');

var crawler = new Crawler({
  concurrent: 5,
  logs: true,
  request: { // config for 'request' package
    headers: { 'user-agent': 'node-crawler' },
  },
  // If defined 'decodeTo' and not 'decodeFrom' then charset of 'response.body' will be detected automatically
  decodeTo: 'utf8',
  decodeFrom: '', // e.g. 'win-1251'
  callback: function (err, visited) {
    if (err) { throw err; }

    // all requests are done
    console.log('Done! Visited links:');
    console.log(visited);
  }
});

var handleRequest = function (err, url, response, $) {
  if (err) {
    console.log('Error url: '+ url);
    throw err;
  }

  // request done
  var that = this;

  console.log(url);
  console.log(response); // response object

  $('a').each(function(index, node) { // cheerio
    var $node = $(node);
    var href = $node.attr('href').split('#')[0];

    crawler.queue(that.resolve(url, href), handleRequest);
  });
};

crawler.queue('http://google.com/', handleRequest);
crawler.queue('http://yahoo.com/', {/* custom options for this link */}, handleRequest);