Project import generated by Copybara.
GitOrigin-RevId: d9e9e3fb4e31372ec1fb43b178994ca78fa8fe70
diff --git a/static/js/graveyard/xmlhttp.js b/static/js/graveyard/xmlhttp.js
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+/* Copyright 2016 The Chromium Authors. All Rights Reserved.
+ *
+ * Use of this source code is governed by a BSD-style
+ * license that can be found in the LICENSE file or at
+ * https://developers.google.com/open-source/licenses/bsd
+ */
+
+/**
+ * @fileoverview A bunch of XML HTTP recipes used to do RPC from JavaScript
+ */
+
+
+/**
+ * The active x identifier used for ie.
+ * @type String
+ * @private
+ */
+var XH_ieProgId_;
+
+
+// Domain for XMLHttpRequest readyState
+var XML_READY_STATE_UNINITIALIZED = 0;
+var XML_READY_STATE_LOADING = 1;
+var XML_READY_STATE_LOADED = 2;
+var XML_READY_STATE_INTERACTIVE = 3;
+var XML_READY_STATE_COMPLETED = 4;
+
+
+/**
+ * Initialize the private state used by other functions.
+ * @private
+ */
+function XH_XmlHttpInit_() {
+ // The following blog post describes what PROG IDs to use to create the
+ // XMLHTTP object in Internet Explorer:
+ // http://blogs.msdn.com/xmlteam/archive/2006/10/23/using-the-right-version-of-msxml-in-internet-explorer.aspx
+ // However we do not (yet) fully trust that this will be OK for old versions
+ // of IE on Win9x so we therefore keep the last 2.
+ // Versions 4 and 5 have been removed because 3.0 is the preferred "fallback"
+ // per the article above.
+ // - Version 5 was built for Office applications and is not recommended for
+ // web applications.
+ // - Version 4 has been superseded by 6 and is only intended for legacy apps.
+ // - Version 3 has a wide install base and is serviced regularly with the OS.
+
+ /**
+ * Candidate Active X types.
+ * @type Array.<String>
+ * @private
+ */
+ let XH_ACTIVE_X_IDENTS = ['MSXML2.XMLHTTP.6.0', 'MSXML2.XMLHTTP.3.0',
+ 'MSXML2.XMLHTTP', 'Microsoft.XMLHTTP'];
+
+ if (typeof XMLHttpRequest == 'undefined' &&
+ typeof ActiveXObject != 'undefined') {
+ for (let i = 0; i < XH_ACTIVE_X_IDENTS.length; i++) {
+ let candidate = XH_ACTIVE_X_IDENTS[i];
+
+ try {
+ new ActiveXObject(candidate);
+ XH_ieProgId_ = candidate;
+ break;
+ } catch (e) {
+ // do nothing; try next choice
+ }
+ }
+
+ // couldn't find any matches
+ if (!XH_ieProgId_) {
+ throw Error('Could not create ActiveXObject. ActiveX might be disabled,' +
+ ' or MSXML might not be installed.');
+ }
+ }
+}
+
+
+XH_XmlHttpInit_();
+
+
+/**
+ * Create and return an xml http request object that can be passed to
+ * {@link #XH_XmlHttpGET} or {@link #XH_XmlHttpPOST}.
+ */
+function XH_XmlHttpCreate() {
+ if (XH_ieProgId_) {
+ return new ActiveXObject(XH_ieProgId_);
+ } else {
+ return new XMLHttpRequest();
+ }
+}
+
+
+/**
+ * Send a get request.
+ * @param {XMLHttpRequest} xmlHttp as from {@link XH_XmlHttpCreate}.
+ * @param {string} url the service to contact
+ * @param {Function} handler function called when the response is received.
+ */
+function XH_XmlHttpGET(xmlHttp, url, handler) {
+ xmlHttp.open('GET', url, true);
+ xmlHttp.onreadystatechange = handler;
+ XH_XmlHttpSend(xmlHttp, null);
+}
+
+/**
+ * Send a post request.
+ * @param {XMLHttpRequest} xmlHttp as from {@link XH_XmlHttpCreate}.
+ * @param {string} url the service to contact
+ * @param {string} data the request content.
+ * @param {Function} handler function called when the response is received.
+ */
+function XH_XmlHttpPOST(xmlHttp, url, data, handler) {
+ xmlHttp.open('POST', url, true);
+ xmlHttp.onreadystatechange = handler;
+ xmlHttp.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
+ XH_XmlHttpSend(xmlHttp, data);
+}
+
+/**
+ * Calls 'send' on the XMLHttpRequest object and calls a function called 'log'
+ * if any error occured.
+ *
+ * @deprecated This dependes on a function called 'log'. You are better off
+ * handling your errors on application level.
+ *
+ * @param {XMLHttpRequest} xmlHttp as from {@link XH_XmlHttpCreate}.
+ * @param {string|null} data the request content.
+ */
+function XH_XmlHttpSend(xmlHttp, data) {
+ try {
+ xmlHttp.send(data);
+ } catch (e) {
+ // You may want to log/debug this error one that you should be aware of is
+ // e.number == -2146697208, which occurs when the 'Languages...' setting in
+ // IE is empty.
+ // This is not entirely true. The same error code is used when the user is
+ // off line.
+ console.log('XMLHttpSend failed ' + e.toString() + '<br>' + e.stack);
+ throw e;
+ }
+}