New File() - The operation is insecure

Question

I've a problem with javascript. I'm making a AJAX based upload and have an array of all files uploaded. If the site is reloaded I want to restore all files to the array.

I do like this:

var file = new File({the url to the file on my server});

And I get:

SecurityError: The operation is insecure.

I use the same origin, and on my local server: mylocal:88/init.php?page=upload

var file = new File('http://mylocal:88/init.php?file=12345');

Gives me this error. Port, protocol and domain is the same.

Why and how to create a new file without getting this error?

It's not https, I just removed the protocol in the post because it should not be a link. — , Apr 29 '13 at 09:26
I meant does the connection to your server need to be `https` to prevent the `SecurityError`? — starbeamrainbowlabs, Apr 29 '13 at 09:30

Hermann Stephane Ntsamo · Accepted Answer · 2013-04-29T09:39:06.350

1

As far as I know Javascript runs on client machines, they cannot allow client to create files on the server otherwise hacking into servers would be very easy. The FILE object create file on the client side only.

EG: var file = new File("myfile.txt");

file.open("write,create", "text");
file.writeln("The quick brown fox jumped over the lazy dogs");
file.close();

You can however try jquery:

$.get('/init.php?file=12345', function(data) {//This function run when the request is completed.
      alert(data);
      console.log(data);
});

edited Apr 29 '13 at 09:39

answered Apr 29 '13 at 09:29

Hermann Stephane Ntsamo

588
4
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1

Oh, thanks! Never thought of that. Ofc it's only local files. – Apr 29 '13 at 09:32

New File() - The operation is insecure

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