Assaf Arkin Date Challenge

time.js

// see results at https://labnotes.org/validate-your-assumptions/
var http=require('http');
var fs=require('fs');

// read the file and make a list of the hostnames
var list=fs.readFileSync('hostnames.txt').toString().split('\r\n');

// get from one host and process it
function get(a,i) {
  if (i >= a.length) {
    // DEBUG console.log('date not found');
    return;
  }

  // get the host, trim it left and right in case the file has whitespace
  var host = a[i].trimLeft().trimRight();
  var url  = "http://"+host+"/";
  var next = i+1;

  // get the host
  http.get(url,function(res) {
    if (res.headers.date) {
      // date found, print it and quit
      // DEBUG console.log(url);
      var d =new Date(res.headers.date);
      console.log(d.toISOString());
    }
    else {
      // result did not have a date, get next host
      // DEBUG console.log('no date : ' + url);
      get(a,next);
    }
  }).on('error',function(e) {
    // host not found or has no web server, ignore it and get the next one
    // DEBUG console.log('no server : ' + url);
    get(a,next);
  });
}

get(list,0);