how to Retrieve the parameters of document.write to detect the creation of dynamic tags
- by user1335906
In my Project i am supposed to identify the dynamically created tags which can be done in scripts through
document.write("<script src='jquery.js'></script>")
For this i used Regular expressions and my code is as follows
function find_tag_docwrite(text)
{
var attrib=new Object;
var pat_tag=/<((\S+)\s(.*))>/g;
while(t=pat_tag.exec(text)
{
var tag=RegExp.$1;
for(i=0;i<tags.length;i++)
{
var pat=/(\S+)=((['"]*)(\S+)(['"]*)\3)/g;
while(p=pat.exec(f))
{
attr=RegExp.$1;val=RegExp.$4;
attrib[attr]=val;
}
}
}
}
in the above function text is parameters of document.write function. Now through this code i am getting the tag names and all the attributes of the tags.
But for the below example the above code is not working
var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www.");
document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E"));
In such cases Regular expressions does not work so after searching some time where i found hooks on dom methods. so by using this i thought of creating hook for document.write method but i am able to understand how it is done i included the following code in my program but it is not working.
function someFunction(text)
{
console.log(text);
}
document.write = someFunction;
where text is the parameters of document.write.
Another problem is After monitoring all the document.write methods using hooks again i have to use regex for finding tag creations. Is there Any alternative
