User:JackSchmidt/JS Ajax.js

From Wikipedia, the free encyclopedia

Note: After saving, you have to bypass your browser's cache to see the changes. In Internet Explorer and Firefox, hold down the Ctrl key and click the Refresh or Reload button. Opera users have to clear their caches through Tools→Preferences, see the instructions for Opera. Konqueror and Safari users can just click the Reload button. 

// Basic AJAX code for wikipedia
 
// (c) 2007 Jack Schmidt, available under GPL, BSD, or CC-SA
 
// Obviously this just calls api.php and index.php with arguments.
// Since index.php?action=ajax requires repeated arguments, you can
// give a key=value argument in [ key, value ] form, not just { key: value }
// form.
 
function JS_PHP( php, args, id, callback ) {
  var http;
  var url = wgServer + wgScriptPath + '/' + php;
  for ( var k in args ) {
    if( typeof args[k] == typeof [] ) {
    url += ((url.indexOf("?")==-1)?"?":"&") + encodeURIComponent( args[k][0] ) + "="
           + encodeURIComponent( args[k][1] );
    } else
    url += ((url.indexOf("?")==-1)?"?":"&") + encodeURIComponent( k ) + "=" + encodeURIComponent( args[k] );
  }
  http = sajax_init_object();
  http.open( 'GET', url, true );
  http.onreadystatechange = function() { return JS_Callback( http, id, callback ); }
  http.send( null );
}
function JS_API( args, id, callback ) { return JS_PHP( 'api.php', args, id, callback ); }
function JS_INDEX( args, id, callback ) { return JS_PHP( 'index.php', args, id, callback ); }
function JS_QUERY( args, id, callback ) { return JS_PHP( 'query.php', args, id, callback ); }
function JS_Callback( http, id, callback ) {
  if ( !http ) return;
  if ( http.readyState != 4) return;
  if ( http.status != 200 ) return;
  try { callback( id, http.responseXML ? http.responseXML : http.responseText ); } catch (e) { }
};