What I want to do is to allow only one download per user (one access to a href) For that I have a variable in the user's table, which I do change when the link has been clicked.
I use "download.php?file=file.xxx" for doing that.
download.php
$file= basename($_GET['file']);
$root = "documents/rece/";
$path= $root.$file;
echo $path;
if (is_file($path))
{
header('Content-Description: File Transfer');
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename='.$file);
header('Content-Transfer-Encoding: binary');
header('Expires: 0');
header('Cache-Control: must-revalidate');
header('Pragma: public');
header('Content-Length: ' . filesize($path));
readfile($path);
}
else
echo "File error";
exit();
?>
I also update the DDBB and that works. After that I can show or hide the link. The problem is that the downloaded file is corrupted and can't be opened. I will use it with pdf or doc, maybe zip.
Could it be because of the path?
PDF files, as far as I know, start with something like this:
%PDF-1.4
Yours start with 4 blank lines plus documents/rece/Form.pdf%PDF-1.4. You're obviously printing it yourself somewhere before the code you've posted.
Related
I can't download files that already uploaded in my website, for example :
I already uploaded a video file with 800mb file size and it is okay, the file is save to my directory in the File folder, then I want to download that file again, but as soon as I download the file, I will always got 1kb file not the exact size of the file, and when I play it, nothing happen
this is my code:
<?php
include 'db.php';
if(isset($_REQUEST['name']))
{
$var =$_REQUEST['name'];
$dir = "../files/";
$file = $dir . $var;
if(file_exists($file))
{
header('Content-Description: File Transfer');
header('Content-Type: video');
header('Content-Disposition: attachment;
filename='.basename($file));
header('Expires: 0');
header('Cache-Control: must-revalidate');
header('Pragma: public');
header('Content-Length: ' . filesize($file));
ob_clean();
flush();
readfile($file);
mysqli_close($conn);
exit();
}
else{
echo "File not found";
}
}
?>
Yeah, I had the same problem too. After searching alot on the internet, I found out that the problem is related to output buffering. The following code solved my problem.
<?php
$file = $_GET['file'];
if (file_exists($file)) {
header('Content-Description: File Transfer');
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename="'.basename($file).'"');
header('Expires: 0');
header('Cache-Control: must-revalidate');
header('Pragma: public');
header('Content-Length: ' . filesize($file));
ob_end_clean(); //adding this line solves my problem
readfile($file);
exit;
?>
The code ob_end_clean() basically runs grabs everything in the buffer, then erases the buffer, and turns off output buffering.
In the website page contains many images with downloading options. If I click the download button it automatically downloaded on user system and it shows on browser downloadable page. I have PHP code like
$image = file_get_contents('http://website.com/images/logo.png');
file_put_contents('C:/Users/ASUS/Downloads/image.jpg', $image);
Above coding is working fine. But I need to provide the path name for image to save. In user side we don`t know the path.
I need the PHP code to use the browser download location and download images need to show the browser downloads.
not possible to store the image in particular user location due to security issues .you don't force user .you have to suggest him to store particular location .and also you don't know the what file system there in user system.and also downloading path can be setting up by user anywhere so your not able to get that.
$filename = '/images/'.basename($_POST['text']);
file_put_contents($filename, $content);
you have to save/download the image somewhere on your web serwer and next send the file to user using header function, for example:
$file = 'path_to_image';
if (file_exists($file)) {
header('Content-Description: File Transfer');
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename="'.basename($file).'"');
header('Expires: 0');
header('Cache-Control: must-revalidate');
header('Pragma: public');
header('Content-Length: ' . filesize($file));
readfile($file);
exit;
}
else {
echo "file not exists";
}
manual
`<?php
$filename ='http://website.com/images/logo.png';
$size = #getimagesize($filename);
$fp = #fopen($filename, "rb");
if ($size && $fp)
{
header("Content-type: {$size['mime']}");
header("Content-Length: " . filesize($filename));
header("Content-Disposition: attachment; filename=$filename");
header('Content-Transfer-Encoding: binary');
header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
fpassthru($fp);
exit;
}
header("HTTP/1.0 404 Not Found");
?>`
A friend of mine configured h2ml2canvas for me as I don't understand javascript. When saving using h2ml2canvas it generates a random filename e.g.
df0e604b2962492165eb8f2b31578171
Is there a way to specify a filename prefix? e.g. soccer then generate a random 3-4 digit number? Alternatively is there a way to open a save as dialogue instead of downloading an image on click? My download.php file.
<?php
$file = trim($_GET['path']);
// force user to download the image
if (file_exists($file)) {
header('Content-Description: File Transfer');
header('Content-Type: image/png');
header('Content-Disposition: attachment; filename='.basename($file));
header('Content-Transfer-Encoding: binary');
header('Expires: 0');
header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
header('Pragma: public');
header('Content-Length: ' . filesize($file));
ob_clean();
flush();
readfile($file);
unlink($file);
exit;
}
else {
echo "error not found";
}
?>
The filename in your case is actually generated (or not) by the PHP server-side, not the JavaScript you've quoted. When it returns the data to send back, it's including a Content-Disposition header, probably one that looks like this:
Content-Disposition: attachment
It's possible to suggest a filename to the browser by adding to that header:
Content-Disposition: attachment; filename=soccer123.xyz
In the PHP somewhere, you should find:
header("Content-Disposition", "attachment");
or similar. You can change it to:
header("Content-Disposition", "attachment; filename=soccer-" . rand(100,999) . ".xyz");
(Probably best to make the .xyz an appropriate extension for the type of image, e.g. .png or .jpg...)
Re your edit, you can replace:
header('Content-Disposition: attachment; filename='.basename($file));
with
header('Content-Disposition: attachment; filename=soccer-'.rand(100,999).'.xyz');
again you'll want a correct extension instead of .xyz.
Hi I am trying to allow download a demo file which is related to a product. my code is like this
if(isset($_POST['submit'])){
$root = $_SERVER['DOCUMENT_ROOT'];
$path = "/download/";
$path = $root.$path;
$filename = $demo;
$file = $path.$filename;
header('Content-Type: application/force-download');
header("Content-Transfer-Encoding: Binary");
header("Content-Disposition: attachment; filename=\"".basename($file)."\";" );
header("Content-Length: ".filesize($file));
readfile($file);
}
I am able to get file name which is associated with the product by
$demo
After user submits his information, download will start automatically. Now this is downloading a non existing file or corrupted file with the proper file name. please help
<?php
$file = 'monkey.gif';
if (file_exists($file)) {
header('Content-Description: File Transfer');
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename='.basename($file));
header('Content-Transfer-Encoding: binary');
header('Expires: 0');
header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
header('Pragma: public');
header('Content-Length: ' . filesize($file));
ob_clean();
flush();
readfile($file);
exit;
}
?>
As you can see Content type is application/octet-steam meaning file is byte by byte encoded. Also the cache headers are set. Then headers are forcefully sent by ob_clean();flush(); and then the file is read.
The file_exists is there to ensure that given file exists. You should also try not not thrust user input as they could easy write names for your php codes and download EACH file. And with ../ in names of the files, even your documents or system files and so on.
I have an issue with the force download of a file.
I'm using PHPExcel to create a xls file based on information extracted from our database. This all works fine and the Excel file works as required.
I then attempt to force download of created file using the following function. However it downloads webpage rather than as a file.
Currently developing on Win XP SP3, Notepad++, XAMPP (Apache 2.4.3, PHP 5.4.7).
**function following
public function downloadfile($file){
if(file_exists($file) && is_file($file)){
//ob_start();
echo $file;
echo "in file exists";
header('Content-Description: File Transfer');
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename='.basename($file));
header('Content-Transfer-Encoding: binary');
header('Expires: 0');
header('Cache-Control: must-revalidate');
header('Pragma: public');
header('Content-Length: ' . filesize($file));
ob_clean();
flush();
readfile($file);
//ob_end_flush();
}else
echo "file or location does not exist <br>";
echo $file;
}
Any help would be appreciated.
Thanks in advance
If its a excel file then just redirect to that url and by default it will ask for file download.
header("Location: http://site.com/path/to/file/filename.xlsx");
/* Make sure that code below does not get executed when we redirect. */
exit;
If in javascript give
location.href = 'http://site.com/path/to/file/filename.xlsx';
header("Content-Type: application/vnd.ms-excel; charset=UTF-8");
header("Content-Disposition: inline; filename=\"" . $fileName . ".xls\"");
header("Pragma: no-cache");
header("Expires: 0");
readfile($filePath);
try this