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I am porting a Drupal 7 module to Drupal 8; it has a call to file_transfer($uri, $headers). What's the equivalent Drupal 8 code for this?

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    When in doubt, check the api.drupal.org code and/or check Drupal core change records (drupal.org/list-changes/published/drupal). See drupal.org/node/1957078
    – AKS
    Oct 31, 2014 at 16:49
  • @AyeshK Funny, I searched for file_transfer in change records and no results came up. Just tried again, same thing. Barinder, also check out the Symfony docs on the subject
    – Clive
    Oct 31, 2014 at 16:52
  • I wouldn't be surprised if that_awesome_function() with 5-6 lines gets replaced by a 5-6 level deep namespaced 50kb symfony component the very next day ;)
    – AKS
    Oct 31, 2014 at 16:54

1 Answer 1

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It seems file_transfer was removed in favor of BinaryFileResponse.

Symfony has a Symfony\Component\HttpFoundation\BinaryFileResponse class that can be used to deliver files through PHP to the client. It also supports X-Sendfile and X-Accel-Mapping via BinaryFileResponse::trustXSendfileTypeHeader().

file_transfer() has been dropped in favor of that.

Drupal 7:

<?php return file_transfer($uri, $headers); ?>

Drupal 8:

<?php 
use Symfony\Component\HttpFoundation\BinaryFileResponse; ...
return new BinaryFileResponse($uri, 200, $headers); 
?>

When looking for exact replacements and changes in D8, check the relevant api.drupal.org doc page and change records. I find it really comprehensive and has almost every change.

On a side note, I would reevaluate the module code if it happens for you to file_trasnfer() a file. Entire menu system was replaced with Symfony components and I think the odds are, you are still using the old system if it happens to file_transfer() or use some request-response thing in the site.

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