/**
 * @file
 * Small utility to test the HTTP response of a set of servers to a given URL.
 *
 * This program is free software. It comes without any warranty, to
 * the extent permitted by applicable law. You can redistribute it
 * and/or modify it under the terms of the Do What The Fuck You Want
 * To Public License, Version 2, as published by Sam Hocevar. See
 * http://sam.zoy.org/wtfpl/COPYING for more details.
 */

var sys = require('sys');
var url = require('url');
var http = require('http');

if (process.argv.length < 4) {
  sys.print('Usage: cluster-test.js [url] [server1] ... [serverN]\n');
  process.exit(1);
}

// Parse arguments.
var hosts = process.argv;
hosts.shift(); // Node executable.
hosts.shift(); // Path to the JS file.
var target_url = hosts.shift();

sys.print('Testing URL: ' + target_url + '\n\n');

var parsedURL = url.parse(target_url, true);

hosts.forEach(function(host) {
  var client = http.createClient(80, host);
  // Error handling (failure to connect to the host will trigger this).
  client.addListener('error', function(exception) {
    sys.print(host + ' ' + exception.message + '\n')
  });

  // Launch the request.
  var request = client.request('GET', (parsedURL.pathname || '/') + (parsedURL.search || ''), { host: parsedURL.host });

  // Error handling (technical failures during the request might trigger this).
  request.addListener('error', function(exception) {
    sys.print(host + ' ' + exception.message + '\n')
  });

  // Received a valid response.
  request.addListener('response', function(response) {
    sys.print(host + ' ' + response.statusCode + '\n');
  });

  request.end();
});