    /**
     * @author Ed Spencer
     *
     * The Rest proxy is a specialization of the {@link Ext.data.proxy.Ajax AjaxProxy} which simply maps the four actions
     * (create, read, update and destroy) to RESTful HTTP verbs. For example, let's set up a {@link Ext.data.Model Model}
     * with an inline Rest proxy
     *
     *     Ext.define('User', {
     *         extend: 'Ext.data.Model',
     *         fields: ['id', 'name', 'email'],
     *
     *         proxy: {
     *             type: 'rest',
     *             url : '/users'
     *         }
     *     });
     *
     * Now we can create a new User instance and save it via the Rest proxy. Doing this will cause the Proxy to send a POST
     * request to '/users':
     *
     *     var user = Ext.create('User', {name: 'Ed Spencer', email: 'ed@sencha.com'});
     *
     *     user.save(); //POST /users
     *
     * Let's expand this a little and provide a callback for the {@link Ext.data.Model#save} call to update the Model once
     * it has been created. We'll assume the creation went successfully and that the server gave this user an ID of 123:
     *
     *     user.save({
     *         success: function(user) {
     *             user.set('name', 'Khan Noonien Singh');
     *
     *             user.save(); //PUT /users/123
     *         }
     *     });
     *
     * Now that we're no longer creating a new Model instance, the request method is changed to an HTTP PUT, targeting the
     * relevant url for that user. Now let's delete this user, which will use the DELETE method:
     *
     *         user.destroy(); //DELETE /users/123
     *
     * Finally, when we perform a load of a Model or Store, Rest proxy will use the GET method:
     *
     *     //1. Load via Store
     *
     *     //the Store automatically picks up the Proxy from the User model
     *     var store = Ext.create('Ext.data.Store', {
     *         model: 'User'
     *     });
     *
     *     store.load(); //GET /users
     *
     *     //2. Load directly from the Model
     *
     *     //GET /users/123
     *     Ext.ModelManager.getModel('User').load(123, {
     *         success: function(user) {
     *             console.log(user.getId()); //outputs 123
     *         }
     *     });
     *
     * # Url generation
     *
     * The Rest proxy is able to automatically generate the urls above based on two configuration options - {@link #appendId} and
     * {@link #format}. If appendId is true (it is by default) then Rest proxy will automatically append the ID of the Model
     * instance in question to the configured url, resulting in the '/users/123' that we saw above.
     *
     * If the request is not for a specific Model instance (e.g. loading a Store), the url is not appended with an id.
     * The Rest proxy will automatically insert a '/' before the ID if one is not already present.
     *
     *     new Ext.data.proxy.Rest({
     *         url: '/users',
     *         appendId: true //default
     *     });
     *
     *     // Collection url: /users
     *     // Instance url  : /users/123
     *
     * The Rest proxy can also optionally append a format string to the end of any generated url:
     *
     *     new Ext.data.proxy.Rest({
     *         url: '/users',
     *         format: 'json'
     *     });
     *
     *     // Collection url: /users.json
     *     // Instance url  : /users/123.json
     *
     * If further customization is needed, simply implement the {@link #buildUrl} method and add your custom generated url
     * onto the {@link Ext.data.Request Request} object that is passed to buildUrl. See [Rest proxy's implementation][1] for
     * an example of how to achieve this.
     *
     * Note that Rest proxy inherits from {@link Ext.data.proxy.Ajax AjaxProxy}, which already injects all of the sorter,
     * filter, group and paging options into the generated url. See the {@link Ext.data.proxy.Ajax AjaxProxy docs} for more
     * details.
     *
     * [1]: source/Rest.html#Ext-data-proxy-Rest-method-buildUrl
     */
    Ext.define('Ext.data.proxy.Rest', {
        extend: 'Ext.data.proxy.Ajax',
        alternateClassName: 'Ext.data.RestProxy',
        alias : 'proxy.rest',

        config: {
            /**
             * @cfg {Boolean} appendId
             * True to automatically append the ID of a Model instance when performing a request based on that single instance.
             * See Rest proxy intro docs for more details. Defaults to true.
             */
            appendId: true,

            /**
             * @cfg {String} format
             * Optional data format to send to the server when making any request (e.g. 'json'). See the Rest proxy intro docs
             * for full details. Defaults to null.
             */
            format: null,

            /**
             * @cfg {Boolean} batchActions
             * True to batch actions of a particular type when synchronizing the store. Defaults to false.
             */
            batchActions: false,

            actionMethods: {
                create : 'POST',
                read   : 'GET',
                update : 'PUT',
                destroy: 'DELETE'
            }
        },

        /**
         * Specialized version of buildUrl that incorporates the {@link #appendId} and {@link #format} options into the
         * generated url. Override this to provide further customizations, but remember to call the superclass buildUrl so
         * that additional parameters like the cache buster string are appended.
         * @param {Object} request
         */
        buildUrl: function(request) {
            var me        = this,
                operation = request.getOperation(),
                records   = operation.getRecords() || [],
                record    = records[0],
                format    = me.getFormat(),
                url       = me.getUrl(request),
                params    = request.getParams() || {},
                id        = (record && !record.phantom) ? record.getId() : params.id;

            if (me.getAppendId() && id) {
                if (!url.match(/\/$/)) {
                    url += '/';
                }
                url += id;
                delete params.id;
            }

            if (format) {
                if (!url.match(/\.$/)) {
                    url += '.';
                }

                url += format;
            }

            request.setUrl(url);

            return me.callParent([request]);
        }
    });