Lumen Framework - Send Image via ResponseStream

XController.php

<?php
use Illuminate\Http\Request;
use Symfony\Component\HttpFoundation\StreamedResponse;


class XController 
{

  public function getView(Request $r, $loc='')
  {
    // $loc = absulute path to file
    
    $file = fopen($loc, "rb");
    $size = filesize($loc);
    $content = fread($file, $size);
    fclose($file);

    // mock mimetype, pls use finfo_open()
    $mime = "image/png";

    return $this->streamFile($r, $mime, $content, $size);
  }

  // Provide a streaming file with support for scrubbing
  private function streamFile(Request $r, $contentType, $stream, $fullsize ) {
      $size = $fullsize;
      $response_code = 200;
      $headers = array("Content-type" => $contentType);

      // Check for request for part of the stream
      $range = $r->header('Range');
      if($range != null) {
          $eqPos = strpos($range, "=");
          $toPos = strpos($range, "-");
          $unit = substr($range, 0, $eqPos);
          $start = intval(substr($range, $eqPos+1, $toPos));
          $success = fseek($stream, $start);
          if($success == 0) {
              $size = $fullsize - $start;
              $response_code = 206;
              $headers["Accept-Ranges"] = $unit;
              $headers["Content-Range"] = $unit . " " . $start . "-" . ($fullsize-1) . "/" . $fullsize;
          }
      }

      $headers["Content-Length"] = $size;

      $response = new StreamedResponse(
        function () use ($stream) {
          $out = fopen('php://output', 'w');
          fputs($out, $stream);
          fclose($out);
        }, 200, $headers);
      $response->send();
  }
}