webcheck.ls LiveScript code (easily converted to CoffeeScript) to check the title of a website and notify if the site is down. Requires: growl (npm install growl).

gistfile1.coffee

#!/media/DATA/Mobile/git/josher19/LiveScript/bin/livescript
request = require 'request'
fs = require 'fs'
growl = require('growl')

docheck = (url, expectedTitle, cb = barf) -> 
  return (err, req, body) ->
    try
      return cb(err) if err;
      return cb("Request not processed") if !req;
      return cb({url: url, statusCode:req.statusCode,length:req.body && req.body.length}) if req.statusCode != 200
      return cb("No Body") if !body;
      m=body.match(/<title>(.*?)<\/title>/i); 
      return cb("No match", m) if !m || !m.length;
      cb {url: url, 'got':m[1], 'expected':expectedTitle} if m[1] != expectedTitle
      cb null, true
    catch e
      cb e

barf = (err, obj) -> 
    console.log err, obj # if err
    panic(err, obj) if obj != true

panic = (err, obj) ->
    # send email with error message
    console.log "Panic!"
    # TODO: include URL in msg
    msg = JSON.stringify {"error":err,"object":obj}, null, 2
    fs.writeFileSync('/tmp/lasterr.json', msg)
    growl(msg, {sticky:true, image:'html'});
    console.warn(err);
    process.exit(1);
    err;

# request('http://www.greasemonkey.cn/', docheck('油猴汽车快修'));

# request('http://www.greasemonkey.cn/en/', docheck('Welcome to Grease Monkey'));

###
/*
 * webchecker: check website at URL is online with given title and Status Code of 200 (OK).
 * - url: String such as 'http://www.greasemonkey.cn/'
 * - title: String such as '油猴汽车快修'
 * - cb: callback(error, results) to run when completed
 */
###
webchecker = (url, title, cb) ->
  try 
    request(url, docheck(url, title, cb));
  catch e
    cb e

webchecker('http://www.greasemonkey.cn/', '油猴汽车快修')

webchecker('http://www.greasemonkey.cn/en/', 'Welcome to Grease Monkey')

webchecker('http://www.greasemonkeychina.com/', '油猴汽车快修 ')

# webchecker('http://www.greasemonkeyintl.com/', 'Welcome to Grease Monkey')