Walking the tree node on a page from another domain

Claus Mygind

I have been working with the TreeWalker. I want to load a page from another domain. I got that working fine. I store window.open() object in a global variable winRef.

Then I would like to walk the nodes and find an anchor that contains "seek/log" in it's href attribute.

Can that be done or is that a security violation and not permitted?

I load the winRef variable like this

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winRef = window.open("http://www.otherSite.com" );

I have tried both of the following:

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    var rootnode=winRef.document.getElementById("Form1")

    var walker=winRef.document.createTreeWalker(rootnode, NodeFilter.SHOW_ELEMENT, myfilter, false)

and

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    var rootnode=winRef.getElementById("Form1")

    var walker=winRef.createTreeWalker(rootnode, NodeFilter.SHOW_ELEMENT, myfilter, false)

each time I get the error "Permission denied".

below is my tree walker code.

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 function walkTheNodes()

 {

    //var rootnode=document.getElementById("Form1")

    var rootnode=winRef.getElementById("Form1")

    var walker=document.createTreeWalker(rootnode, NodeFilter.SHOW_ELEMENT, myfilter, false)
 
    //Step through and alert all child nodes

    while (walker.nextNode())

    alert(walker.currentNode.tagName) 
 
    var cHref = walker.currentNode;

    var cChk  = walker.currentNode.href;
 
    var i = walker.currentNode.href.indexOf("seek/log");
 
    if ( i != -1 )

    {

        alert(walker.currentNode.href);

    }else{

        alert("Did not find");

    }
 
    //Go back to the first child node of the collection and alert it

    walker.currentNode=rootnode //reset TreeWalker pointer to point to root node

}
 
myfilter=function(node){

if ( node.tagName=="A") //filter out INPUT

return NodeFilter.FILTER_ACCEPT

else

return NodeFilter.FILTER_SKIP

}

acoder

Yes, this is not going to be possible, but you can serve the page from your domain to avoid cross-domain problems.

Claus Mygind

Ok so how do I capture the page from the domain that is not mine and re-load it from my domain as you suggest?

acoder

See this link for some ideas. Although it is geared towards Ajax, the article is still relevant.

Claus Mygind

Thank you very much for the link. I have also read up on the proxy server idea. I will play around with that and post any success story if I have one. Opening up a proxy may be more of a security problem than I want to deal with to save one click on the mouse. But at least I can see how it is done.

Walking the tree node on a page from another domain

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