Handling large files with Flysystem

Question

I'm using Flysystem in a Symfony app to manage files upload / download on S3.

$downloadableFileStream = $this->get("filesystem")->readStream($document->getDocument()),
$mimeType = $this->get("filesystem")->getMimetype($document->getDocument()),
$filename =$document->getDocument()

if (ob_get_level()) ob_end_clean();
return new StreamedResponse(function () use ($downloadableFileStream, $mimeType, $filename) {
    fpassthru($downloadableFileStream);
}, 200, [
    'Content-Transfer-Encoding', 'binary',
    'Content-Type' => "application/octet-stream",
    'Content-Disposition' => ('attachment; filename="' . $filename . '"'),
    'Content-Length' => fstat($downloadableFileStream)['size'],
]);

It's really slow for large files, i was thinking using stream does not put all file in memory, maybe i'm doing something wrong ? (i have the same problem with upload, i'm using putStream).

The download is instant for small files, but for large files, it seems the complete file is loaded in the filesystem before launch download.

Is there any way to "start" the download not get the entiere file ?

Any suggestions ?

Thanks :)

score 0 · Answer 1 · answered May 21 '18 at 11:21

0

try to add flush(); after fpassthru($downloadableFileStream);

so it will look like

fpassthru($downloadableFileStream);
flush();

Also you don't need $mimeType and $filename in use

answered May 21 '18 at 11:21

Denis Alimov

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it's the same, for a 3mo file, the new page opens wait 5 seconds, et the file is instantly available. i need to start the download, like if i use a direct URL (but i can't because this bucket is private) – Benjamin B. May 21 '18 at 11:40
@BenjaminB. what about a webserver? maybe it is also buffering output? – Denis Alimov May 21 '18 at 11:55
i don't understand what you mean – Benjamin B. May 21 '18 at 12:00
I mean that PHP could work fine, but webserver also buffering putput (nginx or apache whatever you use) – Denis Alimov May 21 '18 at 12:14
i disabled nginx proxy_buffering off; and it's the same :) – Benjamin B. May 21 '18 at 12:26
i fixed the problem temporary by get file from direct S3 secured private URL. maybe what i want to do is impossible – Benjamin B. May 21 '18 at 12:29

Handling large files with Flysystem

1 Answers1