PSR-7 Streams and usage of setting the file to be downloaded without explicitly making it to an implementation like zend-diactoros.

stream.md

Hi,

I was looking a small piece of code

$file = new SplFileObject($path);
while (! $file->eof()) {
   echo $file->fgets();
}

What it is doing is wrap in a closure and read the content only when it is really used.

For a fully understanding of the piece of code, please have a look at https://github.com/friendsofaura/Aura.Asset_Bundle/blob/master/src/AssetResponder.php#L110-L115

I was trying to move it to make use of Psr-7 response and seems there is no other way to rely on the interface, but to use the implementors method or re-invent one again.

Is there a way to achieve this than what I am looking ?

// $response , a psr7 Response
// StreamInterface
$stream = $response->getBody();

The StreamInterface https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-7-http-message.md#34-psrhttpmessagestreaminterface have a method called write() which should be a string. In our case this a closure.

I wished if it would have a method called setFilePath or something and the implementors can read from and do what the above code was doing.

My understanding is you want to create your own Stream to do this. If there was a method to set the file we would have not reinvent it ? I am looking at https://github.com/php-fig/fig-standards/blob/master/accepted/PSR-7-http-message-meta.md#what-if-i-just-want-to-return-a-file

Diactoros stream https://github.com/zendframework/zend-diactoros/blob/master/src/Stream.php#L36 and Slim stream https://github.com/slimphp/Slim/blob/3.x/Slim/Http/Stream.php#L82 itself have different implementation. Seems it would be nice if PSR-7 stream itself have defined a setFilePath method and when there is no contents in the body can try to open the file path and get the output. See copy stream example from @MWOP https://github.com/phly/psr7examples/blob/master/public/copy-stream.php