Home/ Questions/Q 8511927
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-06-11T04:08:30+00:00

This is an issue I have been dealing with for months, and I would

  • 0

This is an issue I have been dealing with for months, and I would really appreciate any help.

I am encoding a string and writing the output to MyFile.js using the function below. While debugging my example, char encodedCode[] displayed as integers has length 12 and these values: 97,0,108,101,114,116,40,34,80,114,0,105.

MyFile.js is correctly generated with the expected size and characters, as I can see from Notepad++.

MyFileServlet.java

public void doPost(HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException
{
    res.setCharacterEncoding("iso-8859-1");
    res.setHeader("Content-Type", "text/javascript;charset=iso-8859-1");
    res.setHeader("Content-Disposition","attachment;filename=MyFile.js");
    PrintWriter printer=res.getWriter();
    char encodedCode[]=encode(req.getParameter("originalScript"));
    printer.write(encodedCode);
    printer.close();
}

However, when I try to run that MyFile.js with some debugging code (see below) from MyFile.html, I get different behaviour depending on the browser:

  • Chrome/Firefox: length 12 values 97,0,108,101,114,116,40,34,80,114,0,105
  • Internet Explorer 9: length 10 values 97,108,101,114,116,40,34,80,114,105

So IE is ignoring all the “0” characters. Why? Thank you very much

JSFIDDLE: http://jsfiddle.net/vnqL2/

Edit: I tried writing those bytes to an external binary file MyFile.xxx and reading them from Javascript/JQuery/Ajax/XMLHttpRequest and I still get the same issue with IE.

MyFile.html

<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<title>My Page</title>
</head>
<body>
<script type="text/javascript" charset="iso-8859-1" src="MyFile.js">
</script>
</body>
</html>

MyFile.js

function d(a)
{
  a=(a+"").split("");
  var l=a.length,x=[l];
  alert(l);
  for(i=0;i<l;i++){
    x[i]=a[i].charCodeAt(0);
    document.write(x[i]);
  }
};
d("HERE GO THOSE BYTES HARDCODED");
Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    I do not know what is your purpose but NULL bytes inside strings are not legit.

    On the other hand you could easily reconstruct an array of bytes (integers) by transmitting the bytes as a comma seperated list of integers. Or another approach would be a json file.
    Example code:

    function d(a)
{
  a=(a+"").split(",");
  var l=a.length,x=[l];
  alert(l);
  for(i=0;i<l;i++){
    x[i]=Number(a[i]);
    document.write(x[i]);
    document.write("<br>");
  }
  return x;
};
var ar = d("97,0,108,101,114,116,40,34,80,114,0,105"); // returns the byte array, length=12

    Test it here

    • 0