readfile(): failed to open stream: Permission denied on Windows Server IIS 8

Question

I've made a file manager application I have an issue when I'm trying to download files The files that are inside the uploads directory and have moved from my php temp directory dont inherit the folder permission so I got this error in php error log

PHP Warning:  readfile(files/xxx.zip): failed to open stream: Permission denied in ...

When I go inside IIS and go into the security tab and apply inherit permissions it works

<?php

    set_time_limit(0);
    ini_set('memory_limit', '2147483648');

    $file = "files/".htmlspecialchars($_GET["file"]);

    $quoted = sprintf('"%s"',addcslashes(basename($file),'"\\"'));
    $size   = filesize($file);
    if (file_exists($file)) {
        header("Pragma: public");
        header("Expires: 0");
        header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
        header("Cache-Control: public");
        header("Content-Description: File Transfer");

        header("Content-Type: force-download");

        header("Content-Disposition: attachment; filename=".$quoted);

        header("Content-Transfer-Encoding: binary");
        header('Connection: Keep-Alive');
        header("Content-Length: ".$size);

        ob_clean();
        flush();
        readfile($file);
    } else {
        header("Location: fileNotFound.php?file=$file");
    }

Possible duplicate of ['Failed to open stream: Permission denied' error - Laravel](https://stackoverflow.com/q/23540083/6521116) — LF00, Jun 02 '17 at 07:56
Yup all permissions checked. But the new files that are uploaded are not inherit both IIS user and IIS_IUSRS permissions only the IIS — Bill, Jun 02 '17 at 08:29

sensorario · Answer 1 · 2017-06-02T08:23:52.587

0

Mmm if you can change folder permission, you can solve the problem. Maybe you also need to restart IIS.

Well, you are using ob_clean that works when you discards content of output buffer. Anyway, if you use ob_clean content before call the function you can get that error. So, ... it is possible that you leaved some " " space or other "invisible" character in other php files?

edited Jun 02 '17 at 08:23

answered Jun 02 '17 at 07:53

sensorario

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I've restarted IIS, I've already checked all the folder permissions but no luck. I also gave same permissions as my temp folder – Bill Jun 02 '17 at 07:55
Try to pass the full file path like "c:/foo/bar" instead of relative path – sensorario Jun 02 '17 at 07:57
If php is installed as a service, you need to restart also php. – sensorario Jun 02 '17 at 07:57
Not working even with full path Also have restarted php – Bill Jun 02 '17 at 08:03
You are using windows, ... try with restart the OS. And try also to paste more code here. – sensorario Jun 02 '17 at 08:05

readfile(): failed to open stream: Permission denied on Windows Server IIS 8

1 Answers1