Global ajax management

jQuery.global-ajax-2.js

/*
 * Requires a minimal change to the $.ajax calls, adding: 
 *  globalAjax: true
 *  globalAjax: {
 *    name: "" // optional
 *    usePostData: true // optional
 *  }
 * As long as the globalAjax object is "truthy", it will store the response,
 * at bare minimum using options.type + "|" + options.url as the key
 */
(function($) {
    "use strict";
    var XHRs = {};
    
    $.ajaxTransport("json", function(options, originalOptions, jqXHR) {
      if (options.globalAjax) {
        var data = options.type === "POST" && !!options.globalAjax.usePostData && "|" + options.data || "",
            name = (options.globalAjax.name || options.type + "|" + options.url) + data;
            
        var xhr = XHRs[name];
        if (xhr) {
          return {
            send: function(_, done) {
              xhr.then(function(_, __, storedXHR) {
                done(storedXHR.status, storedXHR.statusText, { text: storedXHR.responseText }, storedXHR.getAllResponseHeaders());
              }, function(storedXHR, _, __) {
                done(storedXHR.status, storedXHR.statusText, { text: storedXHR.responseText }, storedXHR.getAllResponseHeaders());
              });
            },
            abort: $.noop
          };
        } else {
          XHRs[name] = jqXHR;
        }
      }
    });
    
    $.listGlobalAjax = function() {
      return XHRs;
    };
})($);

jQuery.global-ajax.js

/*
 * Requires a call to special $.globalAjax, possibly requires some refactoring of existing code.
 */
(function($) {
    "use strict";
    var deferreds = {};
    
    function isAjaxCall(a, b) {
        return (a && typeof a !== "function");
    }
    
    $.globalAjax = function(name, urlOrResolved, optionsOrRejected) {
        var deferred = deferreds[name] || (deferreds[name] = $.Deferred());
        
        if (!isAjaxCall(urlOrResolved, optionsOrRejected)) {
            deferred.then(urlOrResolved, optionsOrRejected);
        } else {
            $.ajax(urlOrResolved, optionsOrRejected).then(function(data, textStatus, jqXHR) {
                deferred.resolve(data, textStatus, jqXHR);
            }, function(jqXHR, textStatus, errorThrown) {
                deferred.reject(data, textStatus, errorThrown);
            });
        }
        
        return deferred.promise();
    };
})($);