How to validate XML data/nodes using JavaScript?

Discussion in 'JavaScript' started by maximusdm, Apr 7, 2010.

0
  1. #1
    Hi all,

    Why the code below won't throw me any error whatsoever?

    var xmlDoc;
    var xmlString = "<notes>test<errrrrr>";

    try
    {
    if (window.DOMParser) // Mozilla and Netscape browsers
    {
    var parser = new DOMParser();
    xmlDoc = parser.parseFromString(xmlString, "application/xml");
    }
    else if (window.ActiveXObject) // MSIE
    {
    xmlDoc = new ActiveXObject("Microsoft.XMLDOM");
    xmlDoc.async="false";
    xmlDoc.loadXML(xmlString);
    }
    }
    catch(e)
    {
    alert("Error! " + e.message);
    }

    Thank you!
     
    maximusdm, Apr 7, 2010 IP
  2. maximusdm

    maximusdm Peon

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    #2
    anynone has any clue? :(
     
    maximusdm, Apr 8, 2010 IP
  3. s_ruben

    s_ruben Active Member

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    #3
    Try the method from http://www.w3schools.com/XML/xml_validator.asp:

    
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

<html xmlns="http://www.w3.org/1999/xhtml">

<head>
  <title>Hello!</title>
</head>

<body>

<script>

var xt="",h3OK=1
function checkErrorXML(x)
{
xt=""
h3OK=1
checkXML(x)
}

function checkXML(n)
{
var l,i,nam
nam=n.nodeName
if (nam=="h3")
	{
	if (h3OK==0)
		{
		return;
		}
	h3OK=0
	}
if (nam=="#text")
	{
	xt=xt + n.nodeValue + "\n"
	}
l=n.childNodes.length
for (i=0;i<l;i++)
	{
	checkXML(n.childNodes[i])
	}
}

function validateXML(txt)
{
// code for IE
if (window.ActiveXObject)
  {
  var xmlDoc = new ActiveXObject("Microsoft.XMLDOM");
  xmlDoc.async="false";
  xmlDoc.loadXML(txt);

  if(xmlDoc.parseError.errorCode!=0)
    {
    txt="Error Code: " + xmlDoc.parseError.errorCode + "\n";
    txt=txt+"Error Reason: " + xmlDoc.parseError.reason;
    txt=txt+"Error Line: " + xmlDoc.parseError.line;
    alert(txt);
    }
  else
    {
    alert("No errors found");
    }
  }
// code for Mozilla, Firefox, Opera, etc.
else if (document.implementation.createDocument)
  {
var parser=new DOMParser();
var text=txt;
var xmlDoc=parser.parseFromString(text,"text/xml");

if (xmlDoc.getElementsByTagName("parsererror").length>0)
    {
    checkErrorXML(xmlDoc.getElementsByTagName("parsererror")[0]);
    alert(xt)
    }
  else
    {
    alert("No errors found");
    }
  }
else
  {
  alert('Your browser cannot handle XML validation');
  }
}



var xmlDoc;
var xmlString = "<notes>test<errrrrr>";

validateXML(xmlString);
</script>

</body>

</html>
    Code (markup):
     
    s_ruben, Apr 14, 2010 IP
  4. maximusdm

    maximusdm Peon

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    #4
    Thank you so much Ruben! That helped me a lot!
     
    maximusdm, Apr 26, 2010 IP