在 CodeIgniter 中强制下载

Question

public function download($id,$file_name)
{
    $this->load->helper('download');
    force_download( NULL,base_url().'uploads/files/'.$file_name);
}

I'm using this function to download a file. The id and file name of the file is passed into the function. But whenever it download that file, it's size becomes very less and also the file does'nt execute.

Things that I've already tried:

• Tried to replace NULL with some random name, the same thing happened
• Replace the file name and file path, the same thing happened
• Tried to pass those values by storing in some variables, same happened

Things I would like to mention:

• The files are stored in localhost I'm using wamp server

• Not original files are being downloaded, means it automatically creates a new file of the same name or the name that I've passed in the function.

• The files are either .exe or .apk which I want to download

What I want to do is that, I want to download same original file or even it is a copy of original then it has to be executable (for .exe)

Answer 1

Just do your modification.

function download($path, $name)
{
  // make sure it's a file before doing anything!
  if(is_file($path))
  {
    // get the file mime type using the file extension
    $this->load->helper('file');

    $mime = get_mime_by_extension($path);

    // Build the headers to push out the file properly.
    header('Pragma: public');     // required
    header('Expires: 0');         // no cache
    header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
    header('Last-Modified: '.gmdate ('D, d M Y H:i:s', filemtime ($path)).' GMT');
    header('Cache-Control: private',false);
    header('Content-Type: '.$mime);  // Add the mime type from Code igniter.
    header('Content-Disposition: attachment; filename="'.basename($name).'"');  // Add the file name
    header('Content-Transfer-Encoding: binary');
    header('Content-Length: '.filesize($path)); // provide file size
    header('Connection: close');
    readfile($path); // push it out
    exit();
}

Answer 2

You are passing null to the filename parameter, you need to pass it to the data parameter (2nd parameter), so your code should be like this

public function download($id,$file_name)
{
    $this->load->helper('download');
    force_download(FCPATH.'/uploads/files/'.$file_name, null);
}

also, don't concatenate the base_url() with the path, you can pass the path to the base_url('/path/to/file') function and it'll return the link to that file.

I notice that you are passing the $id variable but it's not used, are you using it in another part of the code that is not included?

And why do you even have a function to just call the force_download() function? can't you just call it inside the Controller?