I may be missing something exceptionally obvious here, but I'm using yii2-flysystem along with Dropbox to read and write files.
I can upload and write them to Dropbox with no problem but then, when reading like this:
$file = Yii::$app->dropboxFs->read($fn);
..all that gives me is a string (/tmp/phpQkg8mJ).
How do I actually force the download of the file that I'm reading? I'm not sure what that temporary file location actually relates to.
Try function readfile().
According to example, your code should be looks something like this:
if (file_exists($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;
}
Related
I'd like users to be able to view files (I need to research this further, PDF/doc viewer, vid player etc) on the site before choosing to download them. Any suggestions on suitable methods?
The main question though is allowing them to download files.
I read on another SO post that this:
<?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;
}
?>
is suitable however I'll be pulling the file name from the database. I'm thinking of using a standard download page so that download.php?filename=thisFileToDownload can pass the filename along.
The other issue is that there are different file types such as images, videos, excel, docs and pdfs etc etc. Are there any problems that I might run into with this?
Thanks for any help
I have the following code for downloading files automatically
at the click of a submit button, everything seems to work fine;
the file downloads in the rigth format, right size, right name, but when I
want to open it, I get an error, the file cannot be read, what could be the
problem?
$file=mysql_fetch_assoc($sel);
$file=$file['downloadlink'];
header('Content-Type: "application/octet-stream"');
header("Content-Transfer-Encoding: Binary");
header("Content-length: ".filesize($file));
header("Content-disposition: attachment; filename=\"".basename($file)."\"");
readfile($file);
you could try tweaking this function from the readfile() comments:
function DownloadFile($file) { // $file = include path
if(file_exists($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;
}
}
I have an addition for this. If the file size is very big, it'll download empty file which we cannot open at all. That is not a problem with 'readfile' function itself. The problem is reading large files into memory. So, for preventing that kind of issues, we have to use 'ob_end_flush()' immediately before to the 'readfile' function for turning off output buffer.
Hope this tip will save someones time. :)
I have a piece of code that allow users download file from server (document such as docs,docx,pdf etc).
Users can download files but it has some errors like the files were broken. For example, a MS Word file after download need to recovery to read content.
I wonder that if there is any mistake in this code (or problem when uploading?).
$size_of_file = filesize($download_path);
header('Content-Description: File Transfer');
header('Content-Type: application/octet-stream');
header('Content-Disposition: attachment; filename=' . $file_name);
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: ' . $size_of_file);
//read file from physical path
readfile($download_path);
Did you try like this ?
<?php
header("Content-type: application/vnd.ms-word");
header("Content-Disposition: attachment; Filename=SaveAsWordDoc.doc");
?>
I found the root of the problem, I hav some extra spaces after php close tag. Thank you guys.
How can I use PHP's include function to include a file and then modify the headers so it forces - at least that's how it's called - browsers to download ITSELF (the PHP file). Is it possible to also modify the preset save name, in order to change the extension from *.php to something else?
Thanks in advance!
PHP include function will parse the file. What you want to do is use file_get_contents or readfile.
Here's an example from the readfile documentation:
$file = 'somefile.gif';
if (file_exists($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;
}
Change the headers to suit your particular needs. Check out the above links for more info.
When I download the original zip it works fine, but when I download it using the below headers and stuff it doesn't work. I know it's better to take this route and tell the browser how to handle the file rather than leave it up to the browser, but I can't get this to work, so I'm tempted to use a header() forward.
$path = $this->tru->config->get('root.path').'/Digital Version of Book for Web.zip';
set_time_limit(0);
header("Cache-Control: public");
header("Content-Description: File Transfer");
header('Content-Type: application/zip');
header("Content-Transfer-Encoding: binary");
header('Content-Disposition: attachment; filename="NewFileName.zip"');
header('Content-Length: ' . filesize($path));
$f = fopen($path, 'rb');
fpassthru($f);
fclose($f);
Edit:
Sorry, what I mean by it doesn't work is that the file downloads in a zip format (all 9.3 MB) but I'm unable to unpackage the zip because it's invalid.
Take a look into the ZIP file using Notepad or another text editor. Check whether there is a PHP error message screwing up the file on the first few lines. It could be a "headers already sent" message or the set_time_limit() call throwing an error due to the script being in safe mode.
Try using readfile(). An example is provided in the PHP Manual.
$file = 'monkey.gif';
if (file_exists($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;
}