\Magento\Framework\Filesystem\Io\File::read() method is not compatible with \Magento\Framework\Filesystem\Io\IoInterface::read()

[bnymn]

Let's first define some classes here that I am going to mention a lot in the description.

use Magento\Framework\Filesystem\Io\IoInterface;
use Magento\Framework\Filesystem\Io\Sftp;
use Magento\Framework\Filesystem\Io\File;

I am using Sftp class in order to download some files from a remote server. In my class, I depend on IoInterface and resolve the dependency in di.xml. In my test, I would like to use File implementation, because I have more control over the local file system then the remote SFTP server.

In the method definition of IoInterface, it says that the second argument can be a resource.

If I give the second argument as a resource it works just fine in the Sftp implementation. However, the File implementation uses copy function of PHP, and it expects the second argument to be a string only.

Preconditions (*)

1. Magento 2.4-develop
2. PHP 7.4

Steps to reproduce (*)

1. Try to run the following code block in a fresh magento installation.

$file = \Magento\Framework\App\ObjectManager::getInstance(\Magento\Framework\Filesystem\Io\File::class);
file_put_contents('/tmp/sample_file', 'Some test file');
$targetHandle = fopen('/tmp/' . rand(), 'w');
$file->cd('/tmp');
$result = $file->read('sample_file', $targetHandle);
var_dump($result);

Expected result (*)

1. I expect the file to be copied to the target path.

Actual result (*)

1. Unfortunately, it gives an error because the copy function requires the second argument to be string.

[m2-assistant]

Hi @bnymn. Thank you for your report.
To help us process this issue please make sure that you provided the following information:

• Summary of the issue
• Information on your environment
• Steps to reproduce
• Expected and actual results

Please make sure that the issue is reproducible on the vanilla Magento instance following Steps to reproduce. To deploy vanilla Magento instance on our environment, please, add a comment to the issue:

@magento give me 2.4-develop instance - upcoming 2.4.x release

For more details, please, review the Magento Contributor Assistant documentation.

@bnymn do you confirm that you were able to reproduce the issue on vanilla Magento instance following steps to reproduce?

• yes
• no

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