ajax.googleapis.com CDN fallback for V²Site

[VillageHubertChen]

• [x] HC: Create issue, describe problem, report SL's proposal
• [ ] discuss with HC if we are gping to implement this and how exactly.
• [ ] implementation
• [ ] review by HC

  Problem

  Current Solution

  Hosting all script libraries on our GitHub Repository

Without VPN our web site could not be loaded because in china ajax.googleapis.com is blocked. To solve this LC has placed copies of all files in our repository and loads from there. This fixed the problem, but caused new problems, as described below

Problems with current solution

• Our V-Squared.github.io repository looks way bigger and heavy on the scripts than it really is
• Archiving our repositories takes longer and files sizes are much bigger

  Proposal

• Move the scripts out of V-Squared.github.io repository
  • Try to find an alternative CDN and use it. See if it works reliable in China
  • https://chineseseoshifu.com/blog/china-hosted-javascript-libraries-jquery-dojo-boostrap.html
  • http://developer.baidu.com/wiki/index.php?title=docs/cplat/libs
  • http://lib.sinaapp.com/
  • http://jscdn.upai.com/
  • http://www.asp.net/ajax/cdn
  • If can not find alternative CDN, create a "api-cdn-alternative" repository and host it there
• Add JavaScript to use a fallback CDN if the ajax.googleapis.com is not available
  • see if we can do this so that this is fast, such as first load is timeout, then load from fallback and then it is cached.
• Check if there is a way to find out in the JavaScript that if you are in China to instantly load another CDN?

  Script Example proposed by Sascha

script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jqueryui/1.7.2/jquery-ui.js"></script>

<script type="text/javascript">
  if (typeof jQuery == 'undefined')
  {
     document.write(unescape("%3Cscript src='/Scripts/jquery-1.4.2.min.js' type='text/javascript'%3E%3C/script%3E"));
     document.write(unescape("%3Cscript src='/Scripts/jqueryui-1.7.2.min.js' type='text/javascript'%3E%3C/script%3E"));
  }
  </script>

• There is supposed to be a great Article from Scott Galloway about CDN fallback.
• http://stackoverflow.com/questions/2607425/is-google-s-cdn-for-jquery-available-in-china