/** * ServerProxy is a superclass of {@link Ext.data.proxy.JsonP JsonPProxy} and {@link Ext.data.proxy.Ajax AjaxProxy}, and * would not usually be used directly. * @protected */Ext.define('Ext.data.proxy.Server', { extend: 'Ext.data.proxy.Proxy', alias : 'proxy.server', alternateClassName: 'Ext.data.ServerProxy', uses : ['Ext.data.Request'], isRemote: true, config: { /** * @cfg {String} url * The URL from which to request the data object. */ url: '', /** * @cfg {String} [pageParam="page"] * The name of the 'page' parameter to send in a request. Defaults to 'page'. Set this to `''` if you don't * want to send a page parameter. */ pageParam: 'page', /** * @cfg {String} [startParam="start"] * The name of the 'start' parameter to send in a request. Defaults to 'start'. Set this to `''` if you don't * want to send a start parameter. */ startParam: 'start', /** * @cfg {String} [limitParam="limit"] * The name of the 'limit' parameter to send in a request. Defaults to 'limit'. Set this to `''` if you don't * want to send a limit parameter. */ limitParam: 'limit', /** * @cfg {String} [groupParam="group"] * The name of the 'group' parameter to send in a request. Defaults to 'group'. Set this to `''` if you don't * want to send a group parameter. */ groupParam: 'group', /** * @cfg {String} [groupDirectionParam="groupDir"] * The name of the direction parameter to send in a request. **This is only used when simpleGroupMode is set to * true.** */ groupDirectionParam: 'groupDir', /** * @cfg {String} [sortParam="sort"] * The name of the 'sort' parameter to send in a request. Defaults to 'sort'. Set this to `''` if you don't * want to send a sort parameter. */ sortParam: 'sort', /** * @cfg {String} [filterParam="filter"] * The name of the 'filter' parameter to send in a request. Defaults to 'filter'. Set this to `''` if you don't * want to send a filter parameter. */ filterParam: 'filter', /** * @cfg {String} [directionParam="dir"] * The name of the direction parameter to send in a request. **This is only used when simpleSortMode is set to * true.** */ directionParam: 'dir', /** * @cfg {String} [idParam="id"] * The name of the parameter which carries the id of the entity being operated upon. */ idParam: 'id', /** * @cfg {Boolean} [simpleSortMode=false] * Enabling simpleSortMode in conjunction with remoteSort will only send one sort property and a direction when a * remote sort is requested. The {@link #directionParam} and {@link #sortParam} will be sent with the property name * and either 'ASC' or 'DESC'. */ simpleSortMode: false, /** * @cfg {Boolean} [simpleGroupMode=false] * Enabling simpleGroupMode in conjunction with remoteGroup will only send one group property and a direction when a * remote group is requested. The {@link #groupDirectionParam} and {@link #groupParam} will be sent with the property name and either 'ASC' * or 'DESC'. */ simpleGroupMode: false, /** * @cfg {Boolean} [noCache=true] * Disable caching by adding a unique parameter name to the request. Set to false to allow caching. Defaults to true. */ noCache : true, /** * @cfg {String} [cacheString="_dc"] * The name of the cache param added to the url when using noCache. Defaults to "_dc". */ cacheString: "_dc", /** * @cfg {Number} timeout * The number of milliseconds to wait for a response. Defaults to 30000 milliseconds (30 seconds). */ timeout : 30000, /** * @cfg {Object} api * Specific urls to call on CRUD action methods "create", "read", "update" and "destroy". Defaults to: * * api: { * create : undefined, * read : undefined, * update : undefined, * destroy : undefined * } * * The url is built based upon the action being executed [create|read|update|destroy] using the commensurate * {@link #api} property, or if undefined default to the configured * {@link Ext.data.Store}.{@link Ext.data.proxy.Server#url url}. * * For example: * * api: { * create : '/controller/new', * read : '/controller/load', * update : '/controller/update', * destroy : '/controller/destroy_action' * } * * If the specific URL for a given CRUD action is undefined, the CRUD action request will be directed to the * configured {@link Ext.data.proxy.Server#url url}. */ api: { create : undefined, read : undefined, update : undefined, destroy : undefined }, /** * @cfg {Object} extraParams * Extra parameters that will be included on every request. Individual requests with params of the same name * will override these params when they are in conflict. */ extraParams: {} }, /** * @event exception * Fires when the server returns an exception. This event may also be listened * to in the event that a request has timed out or has been aborted. * @param {Ext.data.proxy.Proxy} this * @param {Ext.data.Request} request The request that was sent * @param {Ext.data.operation.Operation} operation The operation that triggered the request */ //in a ServerProxy all four CRUD operations are executed in the same manner, so we delegate to doRequest in each case create: function() { return this.doRequest.apply(this, arguments); }, read: function() { return this.doRequest.apply(this, arguments); }, update: function() { return this.doRequest.apply(this, arguments); }, erase: function() { return this.doRequest.apply(this, arguments); }, /** * Sets a value in the underlying {@link #extraParams}. * @param {String} name The key for the new value * @param {Object} value The value */ setExtraParam: function(name, value) { this.getExtraParams()[name] = value; }, /** * Creates an {@link Ext.data.Request Request} object from {@link Ext.data.operation.Operation Operation}. * * This gets called from doRequest methods in subclasses of Server proxy. * * @param {Ext.data.operation.Operation} operation The operation to execute * @return {Ext.data.Request} The request object */ buildRequest: function(operation) { var me = this, initialParams = Ext.apply({}, operation.getParams()), // Clone params right now so that they can be mutated at any point further down the call stack params = Ext.applyIf(initialParams, me.getExtraParams() || {}), request, operationId, idParam; //copy any sorters, filters etc into the params so they can be sent over the wire Ext.applyIf(params, me.getParams(operation)); // Set up the entity id parameter according to the configured name. // This defaults to "id". But TreeStore has a "nodeParam" configuration which // specifies the id parameter name of the node being loaded. operationId = operation.getId(); idParam = me.getIdParam(); if (operationId !== undefined && params[idParam] === undefined) { params[idParam] = operationId; } request = new Ext.data.Request({ params : params, action : operation.getAction(), records : operation.getRecords(), url : operation.getUrl(), operation: operation, // this is needed by JsonSimlet in order to properly construct responses for // requests from this proxy proxy: me }); request.setUrl(me.buildUrl(request)); /* * Save the request on the Operation. Operations don't usually care about Request and Response data, but in the * ServerProxy and any of its subclasses we add both request and response as they may be useful for further processing */ operation.setRequest(request); return request; }, /** * Processes response, which may involve updating or committing records, each of which * will inform the owning stores and their interested views. Finally, we may perform * an additional layout if the data shape has changed. * * @protected */ processResponse: function(success, operation, request, response) { var me = this, exception, reader, resultSet, meta; // Processing a response may involve updating or committing many records // each of which will inform the owning stores, which will ultimately // inform interested views which will most likely have to do a layout // assuming that the data shape has changed. // Bracketing the processing with this event gives owning stores the ability // to fire their own beginupdate/endupdate events which can be used by interested // views to suspend layouts. me.fireEvent('beginprocessresponse', me, response, operation); if (success === true) { reader = me.getReader(); if (response.status === 204) { resultSet = reader.getNullResultSet(); } else { resultSet = reader.read(me.extractResponseData(response), { // If we're doing an update, we want to construct the models ourselves. recordCreator: operation.getRecordCreator() }); } operation.process(resultSet, request, response); exception = !operation.wasSuccessful(); } else { me.setException(operation, response); exception = true; } if (exception) { me.fireEvent('exception', me, response, operation); } // If a JsonReader detected metadata, process it now. // This will fire the 'metachange' event which the Store processes to fire its own 'metachange' else { meta = resultSet.getMetadata(); if (meta) { me.onMetaChange(meta); } } me.afterRequest(request, success); // Tell owning store processing has finished. // It will fire its endupdate event which will cause interested views to // resume layouts. me.fireEvent('endprocessresponse', me, response, operation); }, /** * Sets up an exception on the operation * @private * @param {Ext.data.operation.Operation} operation The operation * @param {Object} response The response */ setException: function(operation, response) { operation.setException({ status: response.status, statusText: response.statusText, response: response }); }, /** * @method * Template method to allow subclasses to specify how to get the response for the reader. * @template * @private * @param {Object} response The server response * @return {Object} The response data to be used by the reader */ extractResponseData: Ext.identityFn, /** * Encode any values being sent to the server. Can be overridden in subclasses. * @protected * @param {Array} value An array of sorters/filters. * @return {Object} The encoded value */ applyEncoding: function(value) { return Ext.encode(value); }, /** * Encodes the array of {@link Ext.util.Sorter} objects into a string to be sent in the request url. By default, * this simply JSON-encodes the sorter data * @param {Ext.util.Sorter[]} sorters The array of {@link Ext.util.Sorter Sorter} objects * @param {Boolean} [preventArray=false] Prevents the items from being output as an array. * @return {String} The encoded sorters */ encodeSorters: function(sorters, preventArray) { var out = [], length = sorters.length, i; for (i = 0; i < length; i++) { out[i] = sorters[i].serialize(); } return this.applyEncoding(preventArray ? out[0] : out); }, /** * Encodes the array of {@link Ext.util.Filter} objects into a string to be sent in the request url. By default, * this simply JSON-encodes the filter data * @param {Ext.util.Filter[]} filters The array of {@link Ext.util.Filter Filter} objects * @return {String} The encoded filters */ encodeFilters: function (filters) { var out = [], length = filters.length, i, filter; for (i = 0; i < length; i++) { filter = filters[i]; // Filters with a custom filterFn cannot be serialized. But since #getFilterFn() // always returns a filterFn, we need to check if it's been generated by default. // If so, we know that the filter cannot have a custom filterFn defined, and it // is therefore okay to serialize. filter.getFilterFn(); if (filter.generatedFilterFn) { out.push(filter.serialize()); } } return this.applyEncoding(out); }, /** * @private * Copy any sorters, filters etc into the params so they can be sent over the wire */ getParams: function(operation) { if (!operation.isReadOperation) { return {}; } var me = this, params = {}, grouper = operation.getGrouper(), sorters = operation.getSorters(), filters = operation.getFilters(), page = operation.getPage(), start = operation.getStart(), limit = operation.getLimit(), simpleSortMode = me.getSimpleSortMode(), simpleGroupMode = me.getSimpleGroupMode(), pageParam = me.getPageParam(), startParam = me.getStartParam(), limitParam = me.getLimitParam(), groupParam = me.getGroupParam(), groupDirectionParam = me.getGroupDirectionParam(), sortParam = me.getSortParam(), filterParam = me.getFilterParam(), directionParam = me.getDirectionParam(), hasGroups, index; if (pageParam && page) { params[pageParam] = page; } if (startParam && (start || start === 0)) { params[startParam] = start; } if (limitParam && limit) { params[limitParam] = limit; } hasGroups = groupParam && grouper; if (hasGroups) { // Grouper is a subclass of sorter, so we can just use the sorter method if (simpleGroupMode) { params[groupParam] = grouper.getProperty(); params[groupDirectionParam] = grouper.getDirection(); } else { params[groupParam] = me.encodeSorters([grouper], true); } } if (sortParam && sorters && sorters.length > 0) { if (simpleSortMode) { index = 0; // Group will be included in sorters, so grab the next one if (sorters.length > 1 && hasGroups) { index = 1; } params[sortParam] = sorters[index].getProperty(); params[directionParam] = sorters[index].getDirection(); } else { params[sortParam] = me.encodeSorters(sorters); } } if (filterParam && filters && filters.length > 0) { params[filterParam] = me.encodeFilters(filters); } return params; }, /** * Generates a url based on a given Ext.data.Request object. By default, ServerProxy's buildUrl will add the * cache-buster param to the end of the url. Subclasses may need to perform additional modifications to the url. * @param {Ext.data.Request} request The request object * @return {String} The url */ buildUrl: function(request) { var me = this, url = me.getUrl(request); //<debug> if (!url) { Ext.Error.raise("You are using a ServerProxy but have not supplied it with a url."); } //</debug> if (me.getNoCache()) { url = Ext.urlAppend(url, Ext.String.format("{0}={1}", me.getCacheString(), Ext.Date.now())); } return url; }, /** * Get the url for the request taking into account the order of priority, * - The request * - The api * - The url * @private * @param {Ext.data.Request} request The request * @return {String} The url */ getUrl: function(request) { var url; if (request) { url = request.getUrl() || this.getApi()[request.getAction()]; } return url ? url : this.callParent(); }, /** * In ServerProxy subclasses, the {@link #create}, {@link #read}, {@link #update} and {@link #erase} methods all * pass through to doRequest. Each ServerProxy subclass must implement the doRequest method - see {@link * Ext.data.proxy.JsonP} and {@link Ext.data.proxy.Ajax} for examples. This method carries the same signature as * each of the methods that delegate to it. * * @param {Ext.data.operation.Operation} operation The Ext.data.operation.Operation object * @param {Function} callback The callback function to call when the Operation has completed * @param {Object} scope The scope in which to execute the callback */ doRequest: function(operation) { //<debug> Ext.Error.raise("The doRequest function has not been implemented on your Ext.data.proxy.Server subclass. See src/data/ServerProxy.js for details"); //</debug> }, /** * Optional callback function which can be used to clean up after a request has been completed. * @param {Ext.data.Request} request The Request object * @param {Boolean} success True if the request was successful * @protected * @template * @method */ afterRequest: Ext.emptyFn, destroy: function() { this.callParent(); Ext.destroy(this.getReader(), this.getWriter()); this.reader = this.writer = null; }});