Skip to content

Павел Резуненко / MTAweb

Go to a project
Switch branch/tag
RemotingProvider.html 19.2 KB
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 
<!DOCTYPE html>
<html>
<head>
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
  <title>The source code</title>
  <link href="../resources/prettify/prettify.css" type="text/css" rel="stylesheet" />
  <script type="text/javascript" src="../resources/prettify/prettify.js"></script>
  <style type="text/css">
    .highlight { display: block; background-color: #ddd; }
  </style>
  <script type="text/javascript">
    function highlight() {
      document.getElementById(location.hash.replace(/#/, "")).className = "highlight";
    }
  </script>
</head>
<body onload="prettyPrint(); highlight();">
  <pre class="prettyprint lang-js"><span id='Ext-direct-RemotingProvider'>/**
</span> * @class Ext.direct.RemotingProvider
 * 
 * &lt;p&gt;The {@link Ext.direct.RemotingProvider RemotingProvider} exposes access to
 * server side methods on the client (a remote procedure call (RPC) type of
 * connection where the client can initiate a procedure on the server).&lt;/p&gt;
 * 
 * &lt;p&gt;This allows for code to be organized in a fashion that is maintainable,
 * while providing a clear path between client and server, something that is
 * not always apparent when using URLs.&lt;/p&gt;
 * 
 * &lt;p&gt;To accomplish this the server-side needs to describe what classes and methods
 * are available on the client-side. This configuration will typically be
 * outputted by the server-side Ext.Direct stack when the API description is built.&lt;/p&gt;
 */
Ext.define('Ext.direct.RemotingProvider', {
    
    /* Begin Definitions */
   
    alias: 'direct.remotingprovider',
    
    extend: 'Ext.direct.JsonProvider', 
    
    requires: [
        'Ext.util.MixedCollection', 
        'Ext.util.DelayedTask', 
        'Ext.direct.Transaction',
        'Ext.direct.RemotingMethod'
    ],
   
    /* End Definitions */
   
<span id='Ext-direct-RemotingProvider-cfg-actions'>   /**
</span>     * @cfg {Object} actions
     * Object literal defining the server side actions and methods. For example, if
     * the Provider is configured with:
     * &lt;pre&gt;&lt;code&gt;
&quot;actions&quot;:{ // each property within the 'actions' object represents a server side Class 
    &quot;TestAction&quot;:[ // array of methods within each server side Class to be   
    {              // stubbed out on client
        &quot;name&quot;:&quot;doEcho&quot;, 
        &quot;len&quot;:1            
    },{
        &quot;name&quot;:&quot;multiply&quot;,// name of method
        &quot;len&quot;:2           // The number of parameters that will be used to create an
                          // array of data to send to the server side function.
                          // Ensure the server sends back a Number, not a String. 
    },{
        &quot;name&quot;:&quot;doForm&quot;,
        &quot;formHandler&quot;:true, // direct the client to use specialized form handling method 
        &quot;len&quot;:1
    }]
}
     * &lt;/code&gt;&lt;/pre&gt;
     * &lt;p&gt;Note that a Store is not required, a server method can be called at any time.
     * In the following example a &lt;b&gt;client side&lt;/b&gt; handler is used to call the
     * server side method &quot;multiply&quot; in the server-side &quot;TestAction&quot; Class:&lt;/p&gt;
     * &lt;pre&gt;&lt;code&gt;
TestAction.multiply(
    2, 4, // pass two arguments to server, so specify len=2
    // callback function after the server is called
    // result: the result returned by the server
    //      e: Ext.direct.RemotingEvent object
    function(result, e){
        var t = e.getTransaction();
        var action = t.action; // server side Class called
        var method = t.method; // server side method called
        if(e.status){
            var answer = Ext.encode(result); // 8
    
        }else{
            var msg = e.message; // failure message
        }
    }
);
     * &lt;/code&gt;&lt;/pre&gt;
     * In the example above, the server side &quot;multiply&quot; function will be passed two
     * arguments (2 and 4).  The &quot;multiply&quot; method should return the value 8 which will be
     * available as the &lt;tt&gt;result&lt;/tt&gt; in the example above. 
     */
    
<span id='Ext-direct-RemotingProvider-cfg-namespace'>    /**
</span>     * @cfg {String/Object} namespace
     * Namespace for the Remoting Provider (defaults to the browser global scope of &lt;i&gt;window&lt;/i&gt;).
     * Explicitly specify the namespace Object, or specify a String to have a
     * {@link Ext#namespace namespace created} implicitly.
     */
    
<span id='Ext-direct-RemotingProvider-cfg-url'>    /**
</span>     * @cfg {String} url
     * &lt;b&gt;Required&lt;/b&gt;. The url to connect to the {@link Ext.direct.Manager} server-side router. 
     */
    
<span id='Ext-direct-RemotingProvider-cfg-enableUrlEncode'>    /**
</span>     * @cfg {String} enableUrlEncode
     * Specify which param will hold the arguments for the method.
     * Defaults to &lt;tt&gt;'data'&lt;/tt&gt;.
     */
    
<span id='Ext-direct-RemotingProvider-cfg-enableBuffer'>    /**
</span>     * @cfg {Number/Boolean} enableBuffer
     * &lt;p&gt;&lt;tt&gt;true&lt;/tt&gt; or &lt;tt&gt;false&lt;/tt&gt; to enable or disable combining of method
     * calls. If a number is specified this is the amount of time in milliseconds
     * to wait before sending a batched request.&lt;/p&gt;
     * &lt;br&gt;&lt;p&gt;Calls which are received within the specified timeframe will be
     * concatenated together and sent in a single request, optimizing the
     * application by reducing the amount of round trips that have to be made
     * to the server.&lt;/p&gt;
     */
    enableBuffer: 10,
    
<span id='Ext-direct-RemotingProvider-cfg-maxRetries'>    /**
</span>     * @cfg {Number} maxRetries
     * Number of times to re-attempt delivery on failure of a call.
     */
    maxRetries: 1,
    
<span id='Ext-direct-RemotingProvider-cfg-timeout'>    /**
</span>     * @cfg {Number} timeout
     * The timeout to use for each request.
     */
    timeout: undefined,
    
    constructor : function(config){
        var me = this;
        me.callParent(arguments);
        me.addEvents(
<span id='Ext-direct-RemotingProvider-event-beforecall'>            /**
</span>             * @event beforecall
             * Fires immediately before the client-side sends off the RPC call.
             * By returning false from an event handler you can prevent the call from
             * executing.
             * @param {Ext.direct.RemotingProvider} provider
             * @param {Ext.direct.Transaction} transaction
             * @param {Object} meta The meta data
             */            
            'beforecall',            
<span id='Ext-direct-RemotingProvider-event-call'>            /**
</span>             * @event call
             * Fires immediately after the request to the server-side is sent. This does
             * NOT fire after the response has come back from the call.
             * @param {Ext.direct.RemotingProvider} provider
             * @param {Ext.direct.Transaction} transaction
             * @param {Object} meta The meta data
             */            
            'call'
        );
        me.namespace = (Ext.isString(me.namespace)) ? Ext.ns(me.namespace) : me.namespace || window;
        me.transactions = new Ext.util.MixedCollection();
        me.callBuffer = [];
    },
    
<span id='Ext-direct-RemotingProvider-method-initAPI'>    /**
</span>     * Initialize the API
     * @private
     */
    initAPI : function(){
        var actions = this.actions,
            namespace = this.namespace,
            action,
            cls,
            methods,
            i,
            len,
            method;
            
        for (action in actions) {
            if (actions.hasOwnProperty(action)) {
                cls = namespace[action];
                if (!cls) {
                    cls = namespace[action] = {};
                }
                methods = actions[action];
                
                for (i = 0, len = methods.length; i &lt; len; ++i) {
                    method = new Ext.direct.RemotingMethod(methods[i]);
                    cls[method.name] = this.createHandler(action, method);
                }
            }
        }
    },
    
<span id='Ext-direct-RemotingProvider-method-createHandler'>    /**
</span>     * Create a handler function for a direct call.
     * @private
     * @param {String} action The action the call is for
     * @param {Object} method The details of the method
     * @return {Function} A JS function that will kick off the call
     */
    createHandler : function(action, method){
        var me = this,
            handler;
        
        if (!method.formHandler) {
            handler = function(){
                me.configureRequest(action, method, Array.prototype.slice.call(arguments, 0));
            };
        } else {
            handler = function(form, callback, scope){
                me.configureFormRequest(action, method, form, callback, scope);
            };
        }
        handler.directCfg = {
            action: action,
            method: method
        };
        return handler;
    },
    
    // inherit docs
    isConnected: function(){
        return !!this.connected;
    },

    // inherit docs
    connect: function(){
        var me = this;
        
        if (me.url) {
            me.initAPI();
            me.connected = true;
            me.fireEvent('connect', me);
        } else if(!me.url) {
            //&lt;debug&gt;
            Ext.Error.raise('Error initializing RemotingProvider, no url configured.');
            //&lt;/debug&gt;
        }
    },

    // inherit docs
    disconnect: function(){
        var me = this;
        
        if (me.connected) {
            me.connected = false;
            me.fireEvent('disconnect', me);
        }
    },
    
<span id='Ext-direct-RemotingProvider-method-runCallback'>    /**
</span>     * Run any callbacks related to the transaction.
     * @private
     * @param {Ext.direct.Transaction} transaction The transaction
     * @param {Ext.direct.Event} event The event
     */
    runCallback: function(transaction, event){
        var success = !!event.status,
            funcName = success ? 'success' : 'failure',
            callback,
            result;
        
        if (transaction &amp;&amp; transaction.callback) {
            callback = transaction.callback;
            result = Ext.isDefined(event.result) ? event.result : event.data;
        
            if (Ext.isFunction(callback)) {
                callback(result, event, success);
            } else {
                Ext.callback(callback[funcName], callback.scope, [result, event, success]);
                Ext.callback(callback.callback, callback.scope, [result, event, success]);
            }
        }
    },
    
<span id='Ext-direct-RemotingProvider-method-onData'>    /**
</span>     * React to the ajax request being completed
     * @private
     */
    onData: function(options, success, response){
        var me = this,
            i = 0,
            len,
            events,
            event,
            transaction,
            transactions;
            
        if (success) {
            events = me.createEvents(response);
            for (len = events.length; i &lt; len; ++i) {
                event = events[i];
                transaction = me.getTransaction(event);
                me.fireEvent('data', me, event);
                if (transaction) {
                    me.runCallback(transaction, event, true);
                    Ext.direct.Manager.removeTransaction(transaction);
                }
            }
        } else {
            transactions = [].concat(options.transaction);
            for (len = transactions.length; i &lt; len; ++i) {
                transaction = me.getTransaction(transactions[i]);
                if (transaction &amp;&amp; transaction.retryCount &lt; me.maxRetries) {
                    transaction.retry();
                } else {
                    event = new Ext.direct.ExceptionEvent({
                        data: null,
                        transaction: transaction,
                        code: Ext.direct.Manager.exceptions.TRANSPORT,
                        message: 'Unable to connect to the server.',
                        xhr: response
                    });
                    me.fireEvent('data', me, event);
                    if (transaction) {
                        me.runCallback(transaction, event, false);
                        Ext.direct.Manager.removeTransaction(transaction);
                    }
                }
            }
        }
    },
    
<span id='Ext-direct-RemotingProvider-method-getTransaction'>    /**
</span>     * Get transaction from XHR options
     * @private
     * @param {Object} options The options sent to the Ajax request
     * @return {Ext.direct.Transaction} The transaction, null if not found
     */
    getTransaction: function(options){
        return options &amp;&amp; options.tid ? Ext.direct.Manager.getTransaction(options.tid) : null;
    },
    
<span id='Ext-direct-RemotingProvider-method-configureRequest'>    /**
</span>     * Configure a direct request
     * @private
     * @param {String} action The action being executed
     * @param {Object} method The being executed
     */
    configureRequest: function(action, method, args){
        var me = this,
            callData = method.getCallData(args),
            data = callData.data, 
            callback = callData.callback, 
            scope = callData.scope,
            transaction;

        transaction = new Ext.direct.Transaction({
            provider: me,
            args: args,
            action: action,
            method: method.name,
            data: data,
            callback: scope &amp;&amp; Ext.isFunction(callback) ? Ext.Function.bind(callback, scope) : callback
        });

        if (me.fireEvent('beforecall', me, transaction, method) !== false) {
            Ext.direct.Manager.addTransaction(transaction);
            me.queueTransaction(transaction);
            me.fireEvent('call', me, transaction, method);
        }
    },
    
<span id='Ext-direct-RemotingProvider-method-getCallData'>    /**
</span>     * Gets the Ajax call info for a transaction
     * @private
     * @param {Ext.direct.Transaction} transaction The transaction
     * @return {Object} The call params
     */
    getCallData: function(transaction){
        return {
            action: transaction.action,
            method: transaction.method,
            data: transaction.data,
            type: 'rpc',
            tid: transaction.id
        };
    },
    
<span id='Ext-direct-RemotingProvider-method-sendRequest'>    /**
</span>     * Sends a request to the server
     * @private
     * @param {Object/Array} data The data to send
     */
    sendRequest : function(data){
        var me = this,
            request = {
                url: me.url,
                callback: me.onData,
                scope: me,
                transaction: data,
                timeout: me.timeout
            }, callData,
            enableUrlEncode = me.enableUrlEncode,
            i = 0,
            len,
            params;
            

        if (Ext.isArray(data)) {
            callData = [];
            for (len = data.length; i &lt; len; ++i) {
                callData.push(me.getCallData(data[i]));
            }
        } else {
            callData = me.getCallData(data);
        }

        if (enableUrlEncode) {
            params = {};
            params[Ext.isString(enableUrlEncode) ? enableUrlEncode : 'data'] = Ext.encode(callData);
            request.params = params;
        } else {
            request.jsonData = callData;
        }
        Ext.Ajax.request(request);
    },
    
<span id='Ext-direct-RemotingProvider-method-queueTransaction'>    /**
</span>     * Add a new transaction to the queue
     * @private
     * @param {Ext.direct.Transaction} transaction The transaction
     */
    queueTransaction: function(transaction){
        var me = this,
            enableBuffer = me.enableBuffer;
        
        if (transaction.form) {
            me.sendFormRequest(transaction);
            return;
        }
        
        me.callBuffer.push(transaction);
        if (enableBuffer) {
            if (!me.callTask) {
                me.callTask = new Ext.util.DelayedTask(me.combineAndSend, me);
            }
            me.callTask.delay(Ext.isNumber(enableBuffer) ? enableBuffer : 10);
        } else {
            me.combineAndSend();
        }
    },
    
<span id='Ext-direct-RemotingProvider-method-combineAndSend'>    /**
</span>     * Combine any buffered requests and send them off
     * @private
     */
    combineAndSend : function(){
        var buffer = this.callBuffer,
            len = buffer.length;
            
        if (len &gt; 0) {
            this.sendRequest(len == 1 ? buffer[0] : buffer);
            this.callBuffer = [];
        }
    },
    
<span id='Ext-direct-RemotingProvider-method-configureFormRequest'>    /**
</span>     * Configure a form submission request
     * @private
     * @param {String} action The action being executed
     * @param {Object} method The method being executed
     * @param {HTMLElement} form The form being submitted
     * @param {Function} callback (optional) A callback to run after the form submits
     * @param {Object} scope (optional) A scope to execute the callback in
     */
    configureFormRequest : function(action, method, form, callback, scope){
        var me = this,
            transaction = new Ext.direct.Transaction({
                provider: me,
                action: action,
                method: method.name,
                args: [form, callback, scope],
                callback: scope &amp;&amp; Ext.isFunction(callback) ? Ext.Function.bind(callback, scope) : callback,
                isForm: true
            }),
            isUpload,
            params;

        if (me.fireEvent('beforecall', me, transaction, method) !== false) {
            Ext.direct.Manager.addTransaction(transaction);
            isUpload = String(form.getAttribute(&quot;enctype&quot;)).toLowerCase() == 'multipart/form-data';
            
            params = {
                extTID: transaction.id,
                extAction: action,
                extMethod: method.name,
                extType: 'rpc',
                extUpload: String(isUpload)
            };
            
            // change made from typeof callback check to callback.params
            // to support addl param passing in DirectSubmit EAC 6/2
            Ext.apply(transaction, {
                form: Ext.getDom(form),
                isUpload: isUpload,
                params: callback &amp;&amp; Ext.isObject(callback.params) ? Ext.apply(params, callback.params) : params
            });
            me.fireEvent('call', me, transaction, method);
            me.sendFormRequest(transaction);
        }
    },
    
<span id='Ext-direct-RemotingProvider-method-sendFormRequest'>    /**
</span>     * Sends a form request
     * @private
     * @param {Ext.direct.Transaction} transaction The transaction to send
     */
    sendFormRequest: function(transaction){
        Ext.Ajax.request({
            url: this.url,
            params: transaction.params,
            callback: this.onData,
            scope: this,
            form: transaction.form,
            isUpload: transaction.isUpload,
            transaction: transaction
        });
    }
    
});
</pre>
</body>
</html>