How to create a XML HttpRequest object
This article focuses on "how to create XML HttpRequest objects", interested friends may wish to have a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn how to create a XML HttpRequest object.
Utl.js
The code is as follows:
Function createXmlTree (node, indent) {
If (node = = null)
Return ""
Var str = ""
Switch (node.nodeType) {
Case 1: / / Element
Str + = ""
Str + = ">"
Var cs = node.childNodes
For (var I = 0; I
< cs.length; i++) str += createXmlTree(cs[i], indent + 3); str += ""; break; case 9: // Document var cs = node.childNodes; for (var i = 0; i < cs.length; i++) str += createXmlTree(cs[i], indent); break; case 3: // Text if (!/^\s*$/.test(node.nodeValue)) str += "" + node.nodeValue + ""; break; case 7: // ProcessInstruction str += "" break; case 4: // CDATA str = "" + node.nodeValue + "]" + "]>"
Break
Case 8: / / Comment
Str = ""
Break
Case 10:
Str = ""
/ / TODO: Handle custom DOCTYPE declarations (ELEMENT, ATTRIBUTE, ENTITY)
Break
Default:
/ / alert (node.nodeType + "\ n" + node.nodeValue)
Inspect (node)
}
Return str
}
Function inspect (obj) {
Var str = ""
For (var k in obj)
Str + = "obj." + k + "=" + obj [k] + "\ n"
Window.alert (str)
}
Function createXmlAttribute (a) {
Return "" + a.nodeName + "=\"+ a.nodeValue +"\ ""
}
The code is as follows:
Ajax test
/ /-XMLHttpObj class-
Function XMLHttpObject (url,Syne) {
Var XMLHttp=null
Var o=this
This.url=url
This.Syne=Syne
This.sendData = function ()
{
If (window.XMLHttpRequest) {
XMLHttp = new XMLHttpRequest ()
} else if (window.ActiveXObject) {
XMLHttp = new ActiveXObject ("Microsoft.XMLHTTP")
}
With (XMLHttp) {
Open ("GET", this.url, this.Syne)
Onreadystatechange = o.CallBack
Send (null)
}
}
This.CallBack=function ()
{
If (XMLHttp.readyState = = 4) {
If (XMLHttp.status = = 200) {
O.debugXML ("readyState:" + XMLHttp.readyState + "")
O.debugXML ("status:" + XMLHttp.status + "")
O.debugXML ("" + createXmlTree (XMLHttp.responseXML,0) + "")
}
}
}
This.getText=function ()
{
If (XMLHttp==null) {return "not loaded XMLHttpRequest"}
If (XMLHttp.readyState==4) {return XMLHttp.responseText}
Return XMLHttp.readyState
}
This.debugXML=function (log)
{
Try {document.getElementById ("XMLDebug") [xss_clean] + = log}
Catch (e) {}
}
}
Var XMLDoc1=new XMLHttpObject ("tree.xml", true)
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