Mash Hash Cache Hashing

gistfile1.js

// Call the server side function to get the mashup data
  $fh.act({
    act: 'getMashup',
    req: {
      hash: hash,
      timestamp: new Date().getTime()
    }
  }, function (res) {
    var mashup = res;
 
    // Check if our hash's match, so we can use the locally cached data
    if (hash === mashup.hash) {
      // we already have the latest data, lets use our cachedData
      updateMashup(hash, cachedMashup);
    }
    else {
      // Hash's don't match, so server has included the newest data to use
      // Lets save it, along with the new hash value
      $fh.data({
        act: 'save',
        key: 'mashup_data',
        val: JSON.stringify(mashup)
      }, function (res) {
        // mashup data saved, no need to do anything else
      }, function (error) {
        alert(error);
      });
      // No need to wait for asynchronous saving above to finish. Lets go ahead
      // and show the latest mashup data
      updateMashup(hash, mashup);
    }
  }, function (code,errorprops,params) {
    // Something went wrong with server side function call, let's alert the user
    alert('Failed to get mashup from server. Error:' + code);
    enableMashupButton();
  });