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Acmlm's Board - I2 Archive - Programming - PHP - Can't upload big files

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HyperLamer
<||bass> and this was the soloution i thought of that was guarinteed to piss off the greatest amount of people

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Posted on 10-12-05 10:28 AM

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I wrote a simple file upload script, nothing too special but it works. The problem is it fails with large files (worked fine with 20K but failed with 6MB). I imagine this is due to the upload_max_filesize in php.ini. Is it possible for me to at least know what this is set to? I don't think I can change it. Is it possible to 'bypass' by handling the file in chunks or something crazy like that?

Also are there any security issues involved with allowing any file to be uploaded, but tacking random numbers onto its extension? I checked that a file like 'blah.php47567568' is treated as text, not as PHP (and the numbers are 7 digits so it won't ever come out as .php3 or some such

), but I don't know if other types of files will be handled the same way.

Elric

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Posted on 10-12-05 10:42 AM

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Originally posted by HyperFapper
I wrote a simple file upload script, nothing too special but it works. The problem is it fails with large files (worked fine with 20K but failed with 6MB). I imagine this is due to the upload_max_filesize in php.ini. Is it possible for me to at least know what this is set to?

There's a magical PHP function called phpinfo(); that tells you all kinds of faptastic info.

Just make a PHP file with that in it, save it as something like info.php, upload it, visit it in your browser, and use CTRL+F to search for upload_max_filesize.

HyperLamer
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Posted on 10-13-05 06:01 AM

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Ah, should have thought of that. As I feared, it's set to the default 2MB.

Don't suppose it's possible to bypass? I need to upload a few files up to 50MB each, just once... I'll ask the admins but I doubt they'll do it.

(edited by HyperFapper on 10-12-05 09:01 PM)

Elric

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Posted on 10-13-05 12:29 PM

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I don't know of a way to bypass it, but then again, I'm still a PHP novice, and I don't know how to make an FTP PHP script to begin with.

However, if you can't find a way to bypass it, and/or the admins won't raise it, the only option I can think of is RAR...

RAR the files you want to upload, and when you make the archive, choose to split it into 1.98MB files. This way, you have a little breathing room before you hit the 2MB limit. With a 50MB file, you'll end up with about 26 parts, which won't be fun, but they'll be there.

Of course, if you're not uploading the files from place A so you can go to place B and download them later, then RAR probably isn't a viable option...

HyperLamer
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Posted on 10-13-05 04:59 PM

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Yeah, I figured that would be it. Not really a good option, because the files are like 50MB and don't compress well.

But I got them from elsewhere anyway.

And the uploader will come in handy for other things.

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Posted on 10-14-05 01:23 AM

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check out ini_set()

HyperLamer
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Posted on 10-14-05 05:23 AM

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Thanks! I didn't think scripts would be allowed to override the settings. Is there a way to set the size to unlimited? This script is only for administrative (read: my) use anyway, so there's no need for a limit.

[edit] 6MB uploads still fail with upload_max_filesize at 50MB and max_input_time at 300 seconds.

(And it didn't appear to take 5 minutes.) post_max_size is already 55MB. No errors show up, it just doesn't upload and move_uploaded_file() fails.

(edited by HyperHacker on 10-13-05 08:26 PM)

Ragnara

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Posted on 10-14-05 09:44 PM

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You could also upload your files in small chunks and then have a php script copy these parts into a single file, couldn't you?

HyperLamer
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Posted on 10-14-05 10:23 PM

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Possibly, but I would need to split them manually, which isn't really going to work so well.

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Posted on 10-15-05 01:58 AM

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Post the script you're using.

HyperLamer
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Posted on 10-15-05 02:10 AM

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<?php
$MAX_FILE_SIZE = 50 * 1024 * 1024; //50MB
ini_set("upload_max_filesize",$MAX_FILE_SIZE); //Normally uploads >2MB will fail
ini_set("max_input_time",300);

if(!$function_php) include "function.php";

if($_FILES['file']['name'])
{
	$Debug = $_POST['debug'];
	$Notify = $_POST['notify'];
	$Path = stripslashes($_POST['path']);
	$FNAME = $_FILES['file']['name'];
	//Make sure the file isn''t too big
	if($_FILES['file']['size'] > $MAX_FILE_SIZE)
		echo "File must be less than " . $MAX_FILE_SIZE . " bytes<br>";
	else
	{
		if(move_uploaded_file($_FILES['file']['tmp_name'],$Path . "/" . $FNAME))
		{
			$UL_SUCCESS = true;
			WriteAdminLog("Uploaded file: '" . $FNAME . "' (" . $_FILES['file']['size'] . " bytes) to " . $Path);
			echo "Uploaded '" . $_FILES['file']['name'] . "' (" . $_FILES['file']['size'] . " bytes) as <a href=\"" . $Path . "/" . $FNAME . "\">" . $FNAME . "</a><br>";
		}
		else
		{
			$UL_SUCCESS = false;
			WriteAdminLog("Upload failed: " . $_FILES['file']['name'] . "(" . $_FILES['file']['size'] . " bytes)");
			echo "Upload failed: " . $_FILES['file']['error'] . "<br>";
		}
		if($Notify) echo "<script language=\"javascript\">alert(\"Upload complete.\");</script>";
	}
}
else
{

echo "Max filesize is " . $MAX_FILE_SIZE . " bytes.<br>\n";

?>

<form name="ul" enctype="multipart/form-data" action="upload.php" method="POST">
File: <input type="file" name="file"><br>
Path: <input type="text" name="path">
<?php
echo "<input type=\"hidden\" name=\"MAX_FILE_SIZE\" value=\"" . $MAX_FILE_SIZE . "\">";
?><br>
<input type="checkbox" name="notify"> Show popup message when finished (requires Javascript)<br>
<input type="submit" value="Upload">
</form>
<?php } ?>

Interestingly enough, when the upload fails, it says the file is 0 bytes.

Narf
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Posted on 10-17-05 11:15 PM

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Try using the script I posted in this thread, be sure to change the 50 to 50000 though if you want to upload 50 MB files.

HyperLamer
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Posted on 10-18-05 12:44 AM

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Er... what exactly does that do differently than mine?

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Posted on 10-18-05 09:46 PM

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Nothing as far as I can tell... If you got FTP access to your webspace, you should make a script that uploads with FTP instead of the traditional way.

For more information:
http://www.php.net/manual/en/ref.ftp.php

(edited by Boom.dk on 10-18-05 12:46 PM)

Narf
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Posted on 10-21-05 03:06 AM

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Originally posted by Santa Claus
Er... what exactly does that do differently than mine?

Shouldn't be any major differences, but mine just looks cleaner and doesn't have a shitload of unnecesary lines, variables and definitions so it's easier to trace bugs in it, would they occur. =)

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Posted on 10-22-05 07:53 PM

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To me, nothing looks unneccesary in HH's script. It all has its use.

mekakame

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Posted on 10-26-05 06:50 PM

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Does this also?

C:\Windows\php.ini, Line 372

; Maximum size of POST data that PHP will accept.
post_max_size = 8M

And your code:

<form name="ul" enctype="multipart/form-data" action="upload.php" method="POST">

As you see, it was also send in post method

HyperLamer
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Posted on 10-26-05 09:21 PM

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You mean the MAX_FILE_SIZE field? It's supposed to tell the browser what size is allowed (though it doesn't seem to do much). Of course it could be spoofed pretty easy, so I don't rely on its value being correct when the form is submitted.

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Posted on 10-28-05 04:38 AM

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I think there are both post_max_size and also upload_max_filesize too.
PHP will only accept first .......... of data in post method.
Thay's what I think.

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