Improving regex for parsing YouTube / Vimeo URLs

Question

I\'ve made a function (in JavaScript) that takes an URL from either YouTube or Vimeo. It figures out the provider and ID for that particular video (demo: http://jsfiddle.net

Answer 1

Regex is wonderfully terse but can quickly get complicated.

http://jsfiddle.net/8nagx2sk/

function parseYouTube(str) {
    // link : //youtube.com/watch?v=Bo_deCOd1HU
    // share : //youtu.be/Bo_deCOd1HU
    // embed : //youtube.com/embed/Bo_deCOd1HU

    var re = /\/\/(?:www\.)?youtu(?:\.be|be\.com)\/(?:watch\?v=|embed\/)?([a-z0-9_\-]+)/i; 
    var matches = re.exec(str);
    return matches && matches[1];
}

function parseVimeo(str) {
    // embed & link: http://vimeo.com/86164897

    var re = /\/\/(?:www\.)?vimeo.com\/([0-9a-z\-_]+)/i;
    var matches = re.exec(str);
    return matches && matches[1];
}

Sometimes simple code is nicer to your fellow developers.

https://jsfiddle.net/1dzb5ag1/

// protocol and www neutral
function getVideoId(url, prefixes) {
  var cleaned = url.replace(/^(https?:)?\/\/(www\.)?/, '');
  for(var i = 0; i < prefixes.length; i++) {
    if (cleaned.indexOf(prefixes[i]) === 0)
      return cleaned.substr(prefixes[i].length)
  }
  return undefined;
}

function getYouTubeId(url) {
  return getVideoId(url, [
    'youtube.com/watch?v=',
    'youtu.be/',
    'youtube.com/embed/',
    'youtube.googleapis.com/v/'
  ]);
}

function getVimeoId(url) {
  return getVideoId(url, [
    'vimeo.com/',
    'player.vimeo.com/'
  ]);
}

Which do you prefer to update?