Extract links from a webpage with concat-stream

extractLinks.js

var http = require('http');
var concat = require('concat-stream');

http.get(process.argv[2], function(res) {
  res.pipe(concat(function(buf) {
    var html = buf.toString();
    var re = /<a.*?href="(.*?)".*?>/gi;
    var links = [];
    var matches;
    while(matches = re.exec(html)) {
      links.push(matches[1]);
    };
    console.log(links);
  }));
});