Auto Graph App

gistfile1.js

jQuery(document).ready(function(){
  var $head = jQuery('head');
  var img_src = jQuery('img').attr('src');
  if (img_src.indexOf('http://') == -1 && img_src.indexOf('https://') == -1)
    img_src = window.location.protocol + '//' + window.location.hostname + jQuery('img').attr('src');
  var ogp_tags = {'title': $head.find('title').text().trim(),
                  'url': window.location.href, 
                  'description': '[%description%]' ? '[%description%]' : jQuery('.lead').html(), 
                  'image': '[%image%]' ? '[%image%]' : img_src, 
                  'type': '[%type%]' ? '[%type%]' : 'website'};
  
  for (i in ogp_tags){
    if(ogp_tags.hasOwnProperty(i) && ogp_tags[i] != null)
      var tag = '<meta property="og:'+ i +'" content="'+ ogp_tags[i] +'" />';
    $head.append(tag);
  }
});