I've seen this example on the documentation for PHP readfile
<?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;
}
?>
How can you make it so It download multiple files say monkey.gif and girraffe.jpg
Preferably without ZIP files...
You can't. It's not a PHP limitation, it's an HTTP/Web-Browser limitation. HTTP doesn't provide a mechanism for sending multiple files over one request.
You could, however, have some PHP script that generates multiple iframes, which would initiate one download each, and fake it that way.
the whole method seems a bit pointless as a physical file actually exists on the server. just use JavaScript to open all the file urls, if you have set the header correctly in your .htaccess file then the files will just download.
I would do something like this
<script>
var files = ['filename1.jpg', 'filename2.jpg'];
for (var i = files.length - 1; i >= 0; i--) {
var a = document.createElement("a");
a.target = "_blank";
a.download = "download";
a.href = 'http://www.example.com/path_to/images/' + files[i];
a.click();
};
</script>
Related
I have gone through all articles on Stack Overflow and can't fix my issue. I am using following code:
$file = $_GET['url'];
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename="'.basename($file).'"');
header('Content-Length: ' . filesize($file));
readfile($file);
exit;
The above mention code is downloading the file from the directly above the root and Yes it is downloading a PDF file but the file is only of 1KB size and not the original size. The $_GET['url'] is receiving ../dir/dir/filename.pdf in it. the filename is space in it as well. For security reason I cannot share the file name.
Please let me know where am I going wrong.
Please make sure you are using the web server path to access the file - for instance your path could be: /home/yourusername/public/sitename/downloads/<filename>, you should check first - to help you can run this at the top of your PHP script to find out the full path for the current script:
echo '<pre>FILE PATH: '.print_r(__FILE__, true).'</pre>';
die();
Only send the filename with the url using urlencode() and on the receiving PHP script use urldecode() to handle any character encoding issues.
See here: http://php.net/manual/en/function.urlencode.php
and here: http://php.net/manual/en/function.urldecode.php
So where you create your url:
Download File
And in your php script:
$file_base_path = '/home/yourusername/public/sitename/downloads/';
$file = urldecode($_GET['url']);
$file = $file_base_path . $file;
$file = $_GET['url'];
if (file_exists($file))
{
if (FALSE!== ($handler = fopen($file, 'r')))
{
header('Content-Description: File Transfer');
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename='.basename($file));
header('Content-Transfer-Encoding: chunked'); //changed to chunked
header('Expires: 0');
header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
header('Pragma: public');
//header('Content-Length: ' . filesize($file)); //Remove
//Send the content in chunks
while(false !== ($chunk = fread($handler,4096)))
{
echo $chunk;
}
}
exit;
}
echo "<h1>Content error</h1><p>The file does not exist!</p>";
I hope this helps you!
I'm trying to setup a backup system that will perform a backup, compress the file and make it downloadable from a browser. The file downloads properly but when I try to uncompress it I get:
unxz: backup_2015-08-12.txz: File format not recognized
There is a backup script that will output
/tmp/agribackup.txz
The PHP script is as follows:
<?php
// Create the agribackup.txz file
$e = shell_exec("/usr/local/bin/agribackup.sh");
$file = '/tmp/agribackup.txz';
if(file_exists($file)) {
header('Content-Description: File Transfer');
header('Content-Type: application/xz');
header('Content-Disposition: attachment; filename=backup_'.date("Y-m-d") . '.txz');
header('Expires: 0');
header('Cache-Control: must-revalidate');
header('Pragma: public');
header('Content-Length: ' . filesize($file));
readfile($file);
exit;
}
?>
I think you are using the wrong Content-Type. Refering to 'http://tukaani.org/xz/xz-file-format.txt', the correct MIME-type is 'application/x-xz'.
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.
I'm trying to save canvas as a image file ,users get to determine which image format to download (png or jpg), then force download the file without storing the file on the server.
This is what I got so far:
JS Script:
$.ajax(
{
type : "POST",
url : "../php/download_image.php",
data:
{
format: 'png',
dataURL: flattenCanvas.toDataURL('image/png')
}
});
PHP:
$data = $_POST['dataURL'];
$format = $_POST['format'];
$file = $file = md5(uniqid()) . '.'.$format;
$uri = substr($data,strpos($data,",")+1);
file_put_contents($file, base64_decode($uri));
if($format == 'png')
{
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($file));
readfile($file);
exit;
}
else {
echo "$file not found";
}
}
The code cannot force download and I have no idea why it is not working.
Any help greatly appreciated.
If you don't want to store the file on the server, you don't need to interact with the server in any way. Just let the user download the content of the canvas as described here.
I am working on Blackberry webworks App. I am displaying some images on the page. I want to save the image in the blackberry Picture folder if user click on it. I used the following code, but its saving it in the memory card, not in the blackberry picture folder. Following is my code:
$file = 'images/' . $_GET['file'];
if (file_exists($file)) {
header('Content-Description: File Transfer');
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename='.basename($file));
header('Content-Transfer-Encoding: binary');
header('Expires: 0');
header('Cache-Control: must-revalidate');
header('Pragma: public');
header('Content-Length: ' . filesize($file));
ob_clean();
flush();
readfile($file);
exit;
}
I have found another way of saving file in blackberry, but I don't understand how to save the image using the following code, its the javascript code that I have got from blackberry forum.
<script type="text/javascript">
var xmlString = "<test>IO functions</test>";
var filePath = "file:///store/home/user/sample.xml";
var parser = new DOMParser();
var doc = parser.parseFromString(xmlString, "text/xml");
var blob_data = blackberry.utils.documentToBlob(doc);
blackberry.io.file.saveFile(filePath, blob_data);
</script>
I also had this problem and since I couldn't find any solution in the API, I've decided to develop an Javascript Extension for it. You can download it from GitHub https://github.com/dbotelho/blackberry.io.filetransfer