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      1 /* Copyright 2013 The Chromium Authors. All rights reserved.
      2  * Use of this source code is governed by a BSD-style license that can be
      3  * found in the LICENSE file.
      4  */
      5 
      6 /**
      7  * @fileoverview
      8  * The sandbox isn't allowed to make XHRs, so they have to be proxied to the
      9  * main process. The XMLHttpRequestProxy class is API-compatible with the
     10  * XMLHttpRequest class, but forwards the requests to the main process where
     11  * they can be serviced. The forwarding of XHRs and responses is handled by
     12  * the WcsSandboxContent class; this class is just a thin wrapper to hook XHR
     13  * creations by JS running in the sandbox.
     14  *
     15  * Because XMLHttpRequest is implemented natively, and because the intent is
     16  * to replace its functionality entirely, prototype linking is not a suitable
     17  * approach here, so much of the interface definition is duplicated from the
     18  * w3c specification: http://www.w3.org/TR/XMLHttpRequest
     19  */
     20 
     21 'use strict';
     22 
     23 /** @suppress {duplicate} */
     24 var remoting = remoting || {};
     25 
     26 /**
     27  * @constructor
     28  * @extends {XMLHttpRequest}
     29  */
     30 remoting.XMLHttpRequestProxy = function() {
     31   /**
     32    * @type {{headers: Object}}
     33    */
     34   this.sandbox_ipc = {
     35     headers: {}
     36   };
     37   /**
     38    * @type {number}
     39    * @private
     40    */
     41   this.xhr_id_ = -1;
     42 };
     43 
     44 remoting.XMLHttpRequestProxy.prototype.open = function(
     45     method, url, async, user, password) {
     46   if (!async) {
     47     console.warn('Synchronous XHRs are not supported.');
     48   }
     49   this.sandbox_ipc.method = method;
     50   this.sandbox_ipc.url = url.toString();
     51   this.sandbox_ipc.user = user;
     52   this.sandbox_ipc.password = password;
     53 };
     54 
     55 remoting.XMLHttpRequestProxy.prototype.send = function(data) {
     56   if (remoting.sandboxContent) {
     57     this.sandbox_ipc.data = data;
     58     this.xhr_id_ = remoting.sandboxContent.sendXhr(this);
     59   }
     60 };
     61 
     62 remoting.XMLHttpRequestProxy.prototype.setRequestHeader = function(
     63     header, value) {
     64   this.sandbox_ipc.headers[header] = value;
     65 };
     66 
     67 remoting.XMLHttpRequestProxy.prototype.abort = function() {
     68   if (this.xhr_id_ != -1) {
     69     remoting.sandboxContent.abortXhr(this.xhr_id_);
     70   }
     71 };
     72 
     73 remoting.XMLHttpRequestProxy.prototype.getResponseHeader = function(header) {
     74   console.error('Sandbox: unproxied getResponseHeader(' + header + ') called.');
     75 };
     76 
     77 remoting.XMLHttpRequestProxy.prototype.getAllResponseHeaders = function() {
     78   console.error('Sandbox: unproxied getAllResponseHeaders called.');
     79 };
     80 
     81 remoting.XMLHttpRequestProxy.prototype.overrideMimeType = function() {
     82   console.error('Sandbox: unproxied overrideMimeType called.');
     83 };
     84 
     85 remoting.XMLHttpRequestProxy.prototype.UNSENT = 0;
     86 remoting.XMLHttpRequestProxy.prototype.OPENED = 1;
     87 remoting.XMLHttpRequestProxy.prototype.HEADERS_RECEIVED = 2;
     88 remoting.XMLHttpRequestProxy.prototype.LOADING = 3;
     89 remoting.XMLHttpRequestProxy.prototype.DONE = 4;
     90