Php secure file download

php secure file download

  • Your Answer
  • The "right way" to handle file downloads in PHP - Media Division
  • PHP: Secure File Download · GitHub
  • Secure file download in PHP, deny user without permission - Stack Overflow
  • 3. Forcing download and Internet Explorer bugs
  • Your Answer

    The author must have been really frustrated and added three Content-Type headers. What would it be like to not having to worry about old versions of Internet Explorer? Note: the quotes in the filename are required in case the file may contain spaces. The code above will fail in IE6 unless the following are added:.

    Now, the use of Cache-Control is wrong in this case, especially to both values set to zero, according to Microsoftbut it works in IE6 and IE7 and later ignores it so no harm done.

    The "right way" to handle file downloads in PHP - Media Division

    If you still get strange results when downloading especially in IEmake sure that the PHP output compression is disabled, as well as any server compression sometimes the server inadvertently applies compression on the output produced by the PHP secure. Historically it had some performance issues and while the documentation claims there are no memory problems, real-life scenarios beg to differ — output buffering and other subtle things.

    Regardless, if you need byte ranges support, you still have to output the old-fashioned way. You just output a header and the php takes care of the rest. This is the source of many seemingly obscure errors. If you have output buffering, the file will not be sent to the user download chunks file only at the end of the script.

    At the start of your script, after checking the file if it exists, etc.

    PHP: Secure File Download. GitHub Gist: instantly share code, notes, and aquapowersystems.coted Reading Time: 40 secs. Sep 21,  · Force to download any file | PHP Tutorial | Secure File Download Download code? Explore at aquapowersystems.co pub rsa/BCCB6 [SC] [expires: ] Key fingerprint = CBAF 69F1 73A0 FEA4 B F D66C B CCB6 uid Christoph M. Becker aquapowersystems.co> pub D/5DA04B5D Key fingerprint = F 6ACD E F D39F 2F79 56BC 5DA0 4B5D uid Stanislav Malyshev (PHP key) uid Stanislav Missing: secure file.

    Be aware that multiple ranges can be specified e. If the range is not valid, you must output.

    Do not try to guess or fix the range s as it may result in corrupted downloads, which are more dangerous than failed ones. Many developers forget to send the code or the Accept-Ranges. Yet others forget that when you send a range, the Content-Length must match the length of the range rather than the size of the whole file.

    php secure file download

    You can output the file using the method described above, skipping until the start of the range and delivering the length of the range. I did my best to provide only accurate information. It would be truly sad for me if an article about avoiding common PHP errors contained errors itself.

    PHP: Secure File Download · GitHub

    Regardless, my point stands: PHP makes it easy to hack together code that appears to be working, but developers should read and adhere to the official specifications. Great post. Im having issues though. Im trying to get the remote pgp with using headers but it kills the ability for the user to be able to stream the podcast.

    Secure file download in PHP, deny user without permission - Stack Overflow

    BTW I found this post that was exactly what i needed and works great! It sends a bogus error if the range is not accepted and sends the full file size as the content length rather than just the length of the range. Now, browsers are probably coded to cope with all sorts of errors, but we should strive to write correct code, not just working code.

    I put all the files in a folder without permission for anyone except host, the problem is when someone buys a file and wants to download it.

    php secure file download

    I decided to make a file getter, that will check permissions of user and then print out the file contents. My code so far:.

    PHP: Secure File Download. GitHub Gist: instantly share code, notes, and aquapowersystems.coted Reading Time: 40 secs. I've seen many download scripts written in PHP, from simple one-liners to dedicated classes. Yet, at least half of them share common errors; in many cases programmers simply copy the code from something that works, without even attempting to understand what it really does. What follows is not a complete working download script, but rather a set of issues you should be Estimated Reading Time: 8 mins. pub rsa/BCCB6 [SC] [expires: ] Key fingerprint = CBAF 69F1 73A0 FEA4 B F D66C B CCB6 uid Christoph M. Becker aquapowersystems.co> pub D/5DA04B5D Key fingerprint = F 6ACD E F D39F 2F79 56BC 5DA0 4B5D uid Stanislav Malyshev (PHP key) uid Stanislav Missing: secure file.

    Now when Im sure the user is authorized to do this, phpScript should write the file contents and send appropiate header to let user download it. How to read file byte-by-byte and print it and what should i write in headerto make the file downloadable so you fils have to copypaste its contents.

    Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Collectives on Stack Overflow. Learn more.

    3. Forcing download and Internet Explorer bugs

    Asked 8 years, 11 months ago. Active 8 years, 4 months ago. Viewed 14k times. Maybe this is not the best way to do this, but it was the best thing I thought of in a while. Thanx for any help.

    Improve this question. Use google. There are millions of explanations about this. Try googling for 'SQL injection' while you're there.


    Add a comment. Active Oldest Votes. Improve this answer. Luca Rainone Luca Rainone This is not safe script. Site users can download other files too with relative path. VibhaJ VibhaJ 2, 18 18 silver badges 31 31 bronze badges. I implemented chip's tutorial, and it work's like charm.

    2 thoughts on “Php secure file download”

    1. Sean Taliaferro:

      Yet, at least half of them share common errors; in many cases programmers simply copy the code from something that works, without even attempting to understand what it really does. What follows is not a complete working download script, but rather a set of issues you should be aware about and that will allow you to write better code. Guessing is not too difficult and in a few tries, an attacker could obtain configuration or password files.

    2. Stephanie Proctor:

      Find centralized, trusted content and collaborate around the technologies you use most. Connect and share knowledge within a single location that is structured and easy to search. I'm making a website where you can buy files for virtual points, and then download them.

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