Upload size/type, before uploading

[dageek]

Hi,

How can I get the filesize and filetype for a 'soon-to-be uploaded' file.

What I'm trying to do is :

Someone needs to upload a file, but for those modem users it's a pain spending 30 min uploading, just to be told that the file they have uploaded is not supported.

1. Make a form with a browse button, the user selects the file and hits submit.
2. Check the file .. Size < xxxx , type = "xxxx"
3. (2)=ok .. continue upload, else 'make some noise'

---

So any 'hacks' to do a :
if ($FILE[userfile][type] == "image/png")
{
continue_upload($FILE[userfile][name]);
}
else
{
echo "File type invalid";
}

or a
if ($_FILE[userfile][size] > 1M😎
{
ask_user("Uploading this file could take a while","continue","cancel");
}

If it's not possible in PHP, how about a javascript ??

DaGeek 🙂

[Anon]

Well, first thing to do is have a note on the page stating what file types are supported.

Then, if they're gormless enough to try and upload a file with the wrong type, it's their own lookout.

The problem is that you can't really check this sort of thing on the client - not without some sort of plugin I'm not viscerally aware of, anyway. You can check the filename in Javascript with an onsubmit() handler - if the form is "myform" and the file field's name is "upload" the property is document.myform.upload.value - to see if the extension is correct, but you can't trust this check to be made or even be accurate (the extension might be incorrect, but again, that's the visitor's lookout).

Obviously it can't be checked at the server until after the file has been uploaded to it!