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/* ************************************************************************
qooxdoo - the new era of web development
http://qooxdoo.org
Copyright:
2004-2007 1&1 Internet AG, Germany, http://www.1and1.org
License:
LGPL: http://www.gnu.org/licenses/lgpl.html
EPL: http://www.eclipse.org/org/documents/epl-v10.php
See the LICENSE file in the project's top-level directory for details.
Authors:
* Sebastian Werner (wpbasti)
* Andreas Ecker (ecker)
************************************************************************ */
/* ************************************************************************
************************************************************************ */
qx.OO.defineClass("qx.net.HttpRequest");
/**
* Return a new XMLHttpRequest object suitable for the client browser.
*
* TODO: extract detection of MSXML version (run once)
*
* @return {HttpRequest}
*/
qx.Class.create = function() { return null };
if (window.XMLHttpRequest)
{
qx.Class.create = function()
{
return new XMLHttpRequest;
};
}
else if (window.ActiveXObject)
{
qx.Class.create = function()
{
/*
According to information on the Microsoft XML Team's WebLog
it is recommended to check for availability of MSXML versions 6.0 and 3.0.
Other versions are included for completeness, 5.0 is excluded as it is
"off-by-default" in IE7 (which could trigger a goldbar).
http://blogs.msdn.com/xmlteam/archive/2006/10/23/using-the-right-version-of-msxml-in-internet-explorer.aspx
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/xmlsdk/html/aabe29a2-bad2-4cea-8387-314174252a74.asp
MSXML 3 is preferred over MSXML 6 because the IE7 native XMLHttpRequest returns
a MSXML 3 document and so does not properly work with other types of xml documents.
*/
var vServers =
[
"MSXML2.XMLHTTP.3.0",
"MSXML2.XMLHTTP.6.0",
"MSXML2.XMLHTTP.4.0",
"MSXML2.XMLHTTP", // v3.0
"Microsoft.XMLHTTP" // v2.x
];
var vObject;
var vServer;
for (var i=0, l=vServers.length; i<l; i++)
{
vServer = vServers[i];
try
{
vObject = new ActiveXObject(vServer);
break;
}
catch(ex)
{
vObject = null;
}
}
return vObject
};
}
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