Connection.js
资源名称:ext-3.0.0.zip [点击查看]
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上传日期:2018-01-28
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文件大小:27k
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中间件编程
开发平台:
JavaScript
- /*! * Ext JS Library 3.0.0 * Copyright(c) 2006-2009 Ext JS, LLC * licensing@extjs.com * http://www.extjs.com/license */ (function(){
- var BEFOREREQUEST = "beforerequest",
- REQUESTCOMPLETE = "requestcomplete",
- REQUESTEXCEPTION = "requestexception",
- UNDEFINED = undefined,
- LOAD = 'load',
- POST = 'POST',
- GET = 'GET',
- WINDOW = window;
- /**
- * @class Ext.data.Connection
- * @extends Ext.util.Observable
- * <p>The class encapsulates a connection to the page's originating domain, allowing requests to be made
- * either to a configured URL, or to a URL specified at request time.</p>
- * <p>Requests made by this class are asynchronous, and will return immediately. No data from
- * the server will be available to the statement immediately following the {@link #request} call.
- * To process returned data, use a
- * <a href="#request-option-success" ext:member="request-option-success" ext:cls="Ext.data.Connection">success callback</a>
- * in the request options object,
- * or an {@link #requestcomplete event listener}.</p>
- * <p><h3>File Uploads</h3><a href="#request-option-isUpload" ext:member="request-option-isUpload" ext:cls="Ext.data.Connection">File uploads</a> are not performed using normal "Ajax" techniques, that
- * is they are <b>not</b> performed using XMLHttpRequests. Instead the form is submitted in the standard
- * manner with the DOM <tt><form></tt> element temporarily modified to have its
- * <a href="http://www.w3.org/TR/REC-html40/present/frames.html#adef-target">target</a> set to refer
- * to a dynamically generated, hidden <tt><iframe></tt> which is inserted into the document
- * but removed after the return data has been gathered.</p>
- * <p>The server response is parsed by the browser to create the document for the IFRAME. If the
- * server is using JSON to send the return object, then the
- * <a href="http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.17">Content-Type</a> header
- * must be set to "text/html" in order to tell the browser to insert the text unchanged into the document body.</p>
- * <p>Characters which are significant to an HTML parser must be sent as HTML entities, so encode
- * "<" as "&lt;", "&" as "&amp;" etc.</p>
- * <p>The response text is retrieved from the document, and a fake XMLHttpRequest object
- * is created containing a <tt>responseText</tt> property in order to conform to the
- * requirements of event handlers and callbacks.</p>
- * <p>Be aware that file upload packets are sent with the content type <a href="http://www.faqs.org/rfcs/rfc2388.html">multipart/form</a>
- * and some server technologies (notably JEE) may require some custom processing in order to
- * retrieve parameter names and parameter values from the packet content.</p>
- * @constructor
- * @param {Object} config a configuration object.
- */
- Ext.data.Connection = function(config){
- Ext.apply(this, config);
- this.addEvents(
- /**
- * @event beforerequest
- * Fires before a network request is made to retrieve a data object.
- * @param {Connection} conn This Connection object.
- * @param {Object} options The options config object passed to the {@link #request} method.
- */
- BEFOREREQUEST,
- /**
- * @event requestcomplete
- * Fires if the request was successfully completed.
- * @param {Connection} conn This Connection object.
- * @param {Object} response The XHR object containing the response data.
- * See <a href="http://www.w3.org/TR/XMLHttpRequest/">The XMLHttpRequest Object</a>
- * for details.
- * @param {Object} options The options config object passed to the {@link #request} method.
- */
- REQUESTCOMPLETE,
- /**
- * @event requestexception
- * Fires if an error HTTP status was returned from the server.
- * See <a href="http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html">HTTP Status Code Definitions</a>
- * for details of HTTP status codes.
- * @param {Connection} conn This Connection object.
- * @param {Object} response The XHR object containing the response data.
- * See <a href="http://www.w3.org/TR/XMLHttpRequest/">The XMLHttpRequest Object</a>
- * for details.
- * @param {Object} options The options config object passed to the {@link #request} method.
- */
- REQUESTEXCEPTION
- );
- Ext.data.Connection.superclass.constructor.call(this);
- };
- // private
- function handleResponse(response){
- this.transId = false;
- var options = response.argument.options;
- response.argument = options ? options.argument : null;
- this.fireEvent(REQUESTCOMPLETE, this, response, options);
- if(options.success){
- options.success.call(options.scope, response, options);
- }
- if(options.callback){
- options.callback.call(options.scope, options, true, response);
- }
- }
- // private
- function handleFailure(response, e){
- this.transId = false;
- var options = response.argument.options;
- response.argument = options ? options.argument : null;
- this.fireEvent(REQUESTEXCEPTION, this, response, options, e);
- if(options.failure){
- options.failure.call(options.scope, response, options);
- }
- if(options.callback){
- options.callback.call(options.scope, options, false, response);
- }
- }
- // private
- function doFormUpload(o, ps, url){
- var id = Ext.id(),
- doc = document,
- frame = doc.createElement('iframe'),
- form = Ext.getDom(o.form),
- hiddens = [],
- hd,
- encoding = 'multipart/form-data',
- buf = {
- target: form.target,
- method: form.method,
- encoding: form.encoding,
- enctype: form.enctype,
- action: form.action
- };
- Ext.apply(frame, {
- id: id,
- name: id,
- className: 'x-hidden',
- src: Ext.SSL_SECURE_URL // for IE
- });
- doc.body.appendChild(frame);
- // This is required so that IE doesn't pop the response up in a new window.
- if(Ext.isIE){
- document.frames[id].name = id;
- }
- Ext.apply(form, {
- target: id,
- method: POST,
- enctype: encoding,
- encoding: encoding,
- action: url || buf.action
- });
- // add dynamic params
- ps = Ext.urlDecode(ps, false);
- for(var k in ps){
- if(ps.hasOwnProperty(k)){
- hd = doc.createElement('input');
- hd.type = 'hidden';
- hd.value = ps[hd.name = k];
- form.appendChild(hd);
- hiddens.push(hd);
- }
- }
- function cb(){
- var me = this,
- // bogus response object
- r = {responseText : '',
- responseXML : null,
- argument : o.argument},
- doc,
- firstChild;
- try{
- doc = frame.contentWindow.document || frame.contentDocument || WINDOW.frames[id].document;
- if(doc){
- if(doc.body){
- if(/textarea/i.test((firstChild = doc.body.firstChild || {}).tagName)){ // json response wrapped in textarea
- r.responseText = firstChild.value;
- }else{
- r.responseText = doc.body.innerHTML;
- }
- }
- //in IE the document may still have a body even if returns XML.
- r.responseXML = doc.XMLDocument || doc;
- }
- }
- catch(e) {}
- Ext.EventManager.removeListener(frame, LOAD, cb, me);
- me.fireEvent(REQUESTCOMPLETE, me, r, o);
- function runCallback(fn, scope, args){
- if(Ext.isFunction(fn)){
- fn.apply(scope, args);
- }
- }
- runCallback(o.success, o.scope, [r, o]);
- runCallback(o.callback, o.scope, [o, true, r]);
- if(!me.debugUploads){
- setTimeout(function(){Ext.removeNode(frame);}, 100);
- }
- }
- Ext.EventManager.on(frame, LOAD, cb, this);
- form.submit();
- Ext.apply(form, buf);
- Ext.each(hiddens, function(h) {
- Ext.removeNode(h);
- });
- }
- Ext.extend(Ext.data.Connection, Ext.util.Observable, {
- /**
- * @cfg {String} url (Optional) <p>The default URL to be used for requests to the server. Defaults to undefined.</p>
- * <p>The <code>url</code> config may be a function which <i>returns</i> the URL to use for the Ajax request. The scope
- * (<code><b>this</b></code> reference) of the function is the <code>scope</code> option passed to the {@link #request} method.</p>
- */
- /**
- * @cfg {Object} extraParams (Optional) An object containing properties which are used as
- * extra parameters to each request made by this object. (defaults to undefined)
- */
- /**
- * @cfg {Object} defaultHeaders (Optional) An object containing request headers which are added
- * to each request made by this object. (defaults to undefined)
- */
- /**
- * @cfg {String} method (Optional) The default HTTP method to be used for requests.
- * (defaults to undefined; if not set, but {@link #request} params are present, POST will be used;
- * otherwise, GET will be used.)
- */
- /**
- * @cfg {Number} timeout (Optional) The timeout in milliseconds to be used for requests. (defaults to 30000)
- */
- timeout : 30000,
- /**
- * @cfg {Boolean} autoAbort (Optional) Whether this request should abort any pending requests. (defaults to false)
- * @type Boolean
- */
- autoAbort:false,
- /**
- * @cfg {Boolean} disableCaching (Optional) True to add a unique cache-buster param to GET requests. (defaults to true)
- * @type Boolean
- */
- disableCaching: true,
- /**
- * @cfg {String} disableCachingParam (Optional) Change the parameter which is sent went disabling caching
- * through a cache buster. Defaults to '_dc'
- * @type String
- */
- disableCachingParam: '_dc',
- /**
- * <p>Sends an HTTP request to a remote server.</p>
- * <p><b>Important:</b> Ajax server requests are asynchronous, and this call will
- * return before the response has been received. Process any returned data
- * in a callback function.</p>
- * <pre><code>
- Ext.Ajax.request({
- url: 'ajax_demo/sample.json',
- success: function(response, opts) {
- var obj = Ext.decode(response.responseText);
- console.dir(obj);
- },
- failure: function(response, opts) {
- console.log('server-side failure with status code ' + response.status);
- }
- });
- * </code></pre>
- * <p>To execute a callback function in the correct scope, use the <tt>scope</tt> option.</p>
- * @param {Object} options An object which may contain the following properties:<ul>
- * <li><b>url</b> : String/Function (Optional)<div class="sub-desc">The URL to
- * which to send the request, or a function to call which returns a URL string. The scope of the
- * function is specified by the <tt>scope</tt> option. Defaults to the configured
- * <tt>{@link #url}</tt>.</div></li>
- * <li><b>params</b> : Object/String/Function (Optional)<div class="sub-desc">
- * An object containing properties which are used as parameters to the
- * request, a url encoded string or a function to call to get either. The scope of the function
- * is specified by the <tt>scope</tt> option.</div></li>
- * <li><b>method</b> : String (Optional)<div class="sub-desc">The HTTP method to use
- * for the request. Defaults to the configured method, or if no method was configured,
- * "GET" if no parameters are being sent, and "POST" if parameters are being sent. Note that
- * the method name is case-sensitive and should be all caps.</div></li>
- * <li><b>callback</b> : Function (Optional)<div class="sub-desc">The
- * function to be called upon receipt of the HTTP response. The callback is
- * called regardless of success or failure and is passed the following
- * parameters:<ul>
- * <li><b>options</b> : Object<div class="sub-desc">The parameter to the request call.</div></li>
- * <li><b>success</b> : Boolean<div class="sub-desc">True if the request succeeded.</div></li>
- * <li><b>response</b> : Object<div class="sub-desc">The XMLHttpRequest object containing the response data.
- * See <a href="http://www.w3.org/TR/XMLHttpRequest/">http://www.w3.org/TR/XMLHttpRequest/</a> for details about
- * accessing elements of the response.</div></li>
- * </ul></div></li>
- * <li><a id="request-option-success"></a><b>success</b> : Function (Optional)<div class="sub-desc">The function
- * to be called upon success of the request. The callback is passed the following
- * parameters:<ul>
- * <li><b>response</b> : Object<div class="sub-desc">The XMLHttpRequest object containing the response data.</div></li>
- * <li><b>options</b> : Object<div class="sub-desc">The parameter to the request call.</div></li>
- * </ul></div></li>
- * <li><b>failure</b> : Function (Optional)<div class="sub-desc">The function
- * to be called upon failure of the request. The callback is passed the
- * following parameters:<ul>
- * <li><b>response</b> : Object<div class="sub-desc">The XMLHttpRequest object containing the response data.</div></li>
- * <li><b>options</b> : Object<div class="sub-desc">The parameter to the request call.</div></li>
- * </ul></div></li>
- * <li><b>scope</b> : Object (Optional)<div class="sub-desc">The scope in
- * which to execute the callbacks: The "this" object for the callback function. If the <tt>url</tt>, or <tt>params</tt> options were
- * specified as functions from which to draw values, then this also serves as the scope for those function calls.
- * Defaults to the browser window.</div></li>
- * <li><b>timeout</b> : Number (Optional)<div class="sub-desc">The timeout in milliseconds to be used for this request. Defaults to 30 seconds.</div></li>
- * <li><b>form</b> : Element/HTMLElement/String (Optional)<div class="sub-desc">The <tt><form></tt>
- * Element or the id of the <tt><form></tt> to pull parameters from.</div></li>
- * <li><a id="request-option-isUpload"></a><b>isUpload</b> : Boolean (Optional)<div class="sub-desc"><b>Only meaningful when used
- * with the <tt>form</tt> option</b>.
- * <p>True if the form object is a file upload (will be set automatically if the form was
- * configured with <b><tt>enctype</tt></b> "multipart/form-data").</p>
- * <p>File uploads are not performed using normal "Ajax" techniques, that is they are <b>not</b>
- * performed using XMLHttpRequests. Instead the form is submitted in the standard manner with the
- * DOM <tt><form></tt> element temporarily modified to have its
- * <a href="http://www.w3.org/TR/REC-html40/present/frames.html#adef-target">target</a> set to refer
- * to a dynamically generated, hidden <tt><iframe></tt> which is inserted into the document
- * but removed after the return data has been gathered.</p>
- * <p>The server response is parsed by the browser to create the document for the IFRAME. If the
- * server is using JSON to send the return object, then the
- * <a href="http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.17">Content-Type</a> header
- * must be set to "text/html" in order to tell the browser to insert the text unchanged into the document body.</p>
- * <p>The response text is retrieved from the document, and a fake XMLHttpRequest object
- * is created containing a <tt>responseText</tt> property in order to conform to the
- * requirements of event handlers and callbacks.</p>
- * <p>Be aware that file upload packets are sent with the content type <a href="http://www.faqs.org/rfcs/rfc2388.html">multipart/form</a>
- * and some server technologies (notably JEE) may require some custom processing in order to
- * retrieve parameter names and parameter values from the packet content.</p>
- * </div></li>
- * <li><b>headers</b> : Object (Optional)<div class="sub-desc">Request
- * headers to set for the request.</div></li>
- * <li><b>xmlData</b> : Object (Optional)<div class="sub-desc">XML document
- * to use for the post. Note: This will be used instead of params for the post
- * data. Any params will be appended to the URL.</div></li>
- * <li><b>jsonData</b> : Object/String (Optional)<div class="sub-desc">JSON
- * data to use as the post. Note: This will be used instead of params for the post
- * data. Any params will be appended to the URL.</div></li>
- * <li><b>disableCaching</b> : Boolean (Optional)<div class="sub-desc">True
- * to add a unique cache-buster param to GET requests.</div></li>
- * </ul></p>
- * <p>The options object may also contain any other property which might be needed to perform
- * postprocessing in a callback because it is passed to callback functions.</p>
- * @return {Number} transactionId The id of the server transaction. This may be used
- * to cancel the request.
- */
- request : function(o){
- var me = this;
- if(me.fireEvent(BEFOREREQUEST, me, o)){
- if (o.el) {
- if(!Ext.isEmpty(o.indicatorText)){
- me.indicatorText = '<div class="loading-indicator">'+o.indicatorText+"</div>";
- }
- if(me.indicatorText) {
- Ext.getDom(o.el).innerHTML = me.indicatorText;
- }
- o.success = (Ext.isFunction(o.success) ? o.success : function(){}).createInterceptor(function(response) {
- Ext.getDom(o.el).innerHTML = response.responseText;
- });
- }
- var p = o.params,
- url = o.url || me.url,
- method,
- cb = {success: handleResponse,
- failure: handleFailure,
- scope: me,
- argument: {options: o},
- timeout : o.timeout || me.timeout
- },
- form,
- serForm;
- if (Ext.isFunction(p)) {
- p = p.call(o.scope||WINDOW, o);
- }
- p = Ext.urlEncode(me.extraParams, Ext.isObject(p) ? Ext.urlEncode(p) : p);
- if (Ext.isFunction(url)) {
- url = url.call(o.scope || WINDOW, o);
- }
- if((form = Ext.getDom(o.form))){
- url = url || form.action;
- if(o.isUpload || /multipart/form-data/i.test(form.getAttribute("enctype"))) {
- return doFormUpload.call(me, o, p, url);
- }
- serForm = Ext.lib.Ajax.serializeForm(form);
- p = p ? (p + '&' + serForm) : serForm;
- }
- method = o.method || me.method || ((p || o.xmlData || o.jsonData) ? POST : GET);
- if(method === GET && (me.disableCaching && o.disableCaching !== false) || o.disableCaching === true){
- var dcp = o.disableCachingParam || me.disableCachingParam;
- url = Ext.urlAppend(url, dcp + '=' + (new Date().getTime()));
- }
- o.headers = Ext.apply(o.headers || {}, me.defaultHeaders || {});
- if(o.autoAbort === true || me.autoAbort) {
- me.abort();
- }
- if((method == GET || o.xmlData || o.jsonData) && p){
- url = Ext.urlAppend(url, p);
- p = '';
- }
- return (me.transId = Ext.lib.Ajax.request(method, url, cb, p, o));
- }else{
- return o.callback ? o.callback.apply(o.scope, [o,UNDEFINED,UNDEFINED]) : null;
- }
- },
- /**
- * Determine whether this object has a request outstanding.
- * @param {Number} transactionId (Optional) defaults to the last transaction
- * @return {Boolean} True if there is an outstanding request.
- */
- isLoading : function(transId){
- return transId ? Ext.lib.Ajax.isCallInProgress(transId) : !! this.transId;
- },
- /**
- * Aborts any outstanding request.
- * @param {Number} transactionId (Optional) defaults to the last transaction
- */
- abort : function(transId){
- if(transId || this.isLoading()){
- Ext.lib.Ajax.abort(transId || this.transId);
- }
- }
- });
- })();
- /**
- * @class Ext.Ajax
- * @extends Ext.data.Connection
- * <p>The global Ajax request class that provides a simple way to make Ajax requests
- * with maximum flexibility.</p>
- * <p>Since Ext.Ajax is a singleton, you can set common properties/events for it once
- * and override them at the request function level only if necessary.</p>
- * <p>Common <b>Properties</b> you may want to set are:<div class="mdetail-params"><ul>
- * <li><b><tt>{@link #method}</tt></b><p class="sub-desc"></p></li>
- * <li><b><tt>{@link #extraParams}</tt></b><p class="sub-desc"></p></li>
- * <li><b><tt>{@link #url}</tt></b><p class="sub-desc"></p></li>
- * </ul></div>
- * <pre><code>
- // Default headers to pass in every request
- Ext.Ajax.defaultHeaders = {
- 'Powered-By': 'Ext'
- };
- * </code></pre>
- * </p>
- * <p>Common <b>Events</b> you may want to set are:<div class="mdetail-params"><ul>
- * <li><b><tt>{@link Ext.data.Connection#beforerequest beforerequest}</tt></b><p class="sub-desc"></p></li>
- * <li><b><tt>{@link Ext.data.Connection#requestcomplete requestcomplete}</tt></b><p class="sub-desc"></p></li>
- * <li><b><tt>{@link Ext.data.Connection#requestexception requestexception}</tt></b><p class="sub-desc"></p></li>
- * </ul></div>
- * <pre><code>
- // Example: show a spinner during all Ajax requests
- Ext.Ajax.on('beforerequest', this.showSpinner, this);
- Ext.Ajax.on('requestcomplete', this.hideSpinner, this);
- Ext.Ajax.on('requestexception', this.hideSpinner, this);
- * </code></pre>
- * </p>
- * <p>An example request:</p>
- * <pre><code>
- // Basic request
- Ext.Ajax.{@link Ext.data.Connection#request request}({
- url: 'foo.php',
- success: someFn,
- failure: otherFn,
- headers: {
- 'my-header': 'foo'
- },
- params: { foo: 'bar' }
- });
- // Simple ajax form submission
- Ext.Ajax.{@link Ext.data.Connection#request request}({
- form: 'some-form',
- params: 'foo=bar'
- });
- * </code></pre>
- * </p>
- * @singleton
- */
- Ext.Ajax = new Ext.data.Connection({
- /**
- * @cfg {String} url @hide
- */
- /**
- * @cfg {Object} extraParams @hide
- */
- /**
- * @cfg {Object} defaultHeaders @hide
- */
- /**
- * @cfg {String} method (Optional) @hide
- */
- /**
- * @cfg {Number} timeout (Optional) @hide
- */
- /**
- * @cfg {Boolean} autoAbort (Optional) @hide
- */
- /**
- * @cfg {Boolean} disableCaching (Optional) @hide
- */
- /**
- * @property disableCaching
- * True to add a unique cache-buster param to GET requests. (defaults to true)
- * @type Boolean
- */
- /**
- * @property url
- * The default URL to be used for requests to the server. (defaults to undefined)
- * If the server receives all requests through one URL, setting this once is easier than
- * entering it on every request.
- * @type String
- */
- /**
- * @property extraParams
- * An object containing properties which are used as extra parameters to each request made
- * by this object (defaults to undefined). Session information and other data that you need
- * to pass with each request are commonly put here.
- * @type Object
- */
- /**
- * @property defaultHeaders
- * An object containing request headers which are added to each request made by this object
- * (defaults to undefined).
- * @type Object
- */
- /**
- * @property method
- * The default HTTP method to be used for requests. Note that this is case-sensitive and
- * should be all caps (defaults to undefined; if not set but params are present will use
- * <tt>"POST"</tt>, otherwise will use <tt>"GET"</tt>.)
- * @type String
- */
- /**
- * @property timeout
- * The timeout in milliseconds to be used for requests. (defaults to 30000)
- * @type Number
- */
- /**
- * @property autoAbort
- * Whether a new request should abort any pending requests. (defaults to false)
- * @type Boolean
- */
- autoAbort : false,
- /**
- * Serialize the passed form into a url encoded string
- * @param {String/HTMLElement} form
- * @return {String}
- */
- serializeForm : function(form){
- return Ext.lib.Ajax.serializeForm(form);
- }
- });