Check if the file exist in my hard drive

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I'm trying to download some PDF files from a server. there is no direct address for files, so I have to launch a url, then a temporary link will create and browser start to download it with a download manager.

I already used this code to open urls with delay

JavaScript

<!doctype html>
<html>
<head>
<title>Open Windows</title>
<script>
function openWindow(){
    var x = document.getElementById('a').value.split('\n');
    atTime = 0;
    for (var i = 0; i < x.length; i++) {
      if (x[i].indexOf('.') > 0) {
        site = x[i];
        if (x[i].indexOf('://') < 0) { site = 'http://' + x[i]; }
        setTimeout("window.open('" + site + "')", atTime);
        atTime += 20000;
      }
    }
}
</script>
<style>
html, body
{
    height : 99%;
    width  : 99%;
}

textarea
{
    height : 80%;
    width  : 90%;
}
</style>
</head>
<body>
<textarea id="a"></textarea>
<br>
<input type="button" value="Open Windows" onClick="openWindow()">
<input type="button" value="Clear" onClick="document.getElementById('a').value=''">
</body>
</html>

here is my question:

How can I customize this code to get some urls, open them in the browser (an starting a download), then check if the file downloaded (exist) in a path on my hard drive (D:\downloads), start the other line to open.

this is an example of url

http://www.example.com/download.php?token=87345&pid=12345

and this is the file name : 12345.pdf

Thanks in advance!

Posted 29-Jan-14 21:04pm

Member 10535602

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OriginalGriff · Answer 1 · 2014-01-29T21:47:00

Solution 1

You can't.
Javascript cannot access the local hard drive, by design.
Think about it: if you could, so could malicious sites...

Posted 29-Jan-14 21:47pm

OriginalGriff

Comments

Member 10535602 30-Jan-14 5:29am

is it another solution using C# or something else?
by the way, I have to do this through a proxy server!

OriginalGriff 30-Jan-14 5:34am

Not that works in 100% of cases: You can do it with an ActiveX control, but they only work with IE, and 99% of IE installations leave them at the default "disabled" setting for security reasons.
Server code is not supposed to access client hardware - or all our HDDs would belong to the a**holes of this world...