Merge branch '5.4' into 6.0

* 5.4:
  Update ExceptionInterface.php
  Revert removal of Stringable check
  Flush with flush() after ob_end_flush()
  [Validator] : Fix "PHP Warning: Undefined array key 1" in NotCompromisedPasswordValidator
  [Validator] Fix traverse option on Valid constraint when used as Attribute
  [HttpFoundation] Fix deleteFileAfterSend on client abortion
  Prevent that bad Ignore method annotations lead to incorrect results
  also fix the test
  fix deprecation
  fix sending request to paths containing multiple slashes
  Fix generated validation error message for wrong exception mapping status code

Author: derrabus

BinaryFileResponse.php

@@ -34,6 +34,7 @@ class BinaryFileResponse extends Response
     protected $offset = 0;
     protected $maxlen = -1;
     protected $deleteFileAfterSend = false;
+    protected $chunkSize = 8 * 1024;
 
     /**
      * @param \SplFileInfo|string $file               The file to stream
@@ -101,6 +102,22 @@ public function getFile(): File
         return $this->file;
     }
 
+    /**
+     * Sets the response stream chunk size.
+     *
+     * @return $this
+     */
+    public function setChunkSize(int $chunkSize): self
+    {
+        if ($chunkSize < 1 || $chunkSize > \PHP_INT_MAX) {
+            throw new \LogicException('The chunk size of a BinaryFileResponse cannot be less than 1 or greater than PHP_INT_MAX.');
+        }
+
+        $this->chunkSize = $chunkSize;
+
+        return $this;
+    }
+
     /**
      * Automatically sets the Last-Modified header according the file modification date.
      *
@@ -282,7 +299,23 @@ public function sendContent(): static
         $out = fopen('php://output', 'w');
         $file = fopen($this->file->getPathname(), 'r');
 
-        stream_copy_to_stream($file, $out, $this->maxlen, $this->offset);
+        ignore_user_abort(true);
+
+        if (0 !== $this->offset) {
+            fseek($file, $this->offset);
+        }
+
+        $length = $this->maxlen;
+        while ($length && !feof($file)) {
+            $read = ($length > $this->chunkSize) ? $this->chunkSize : $length;
+            $length -= $read;
+
+            stream_copy_to_stream($file, $out, $read);
+
+            if (connection_aborted()) {
+                break;
+            }
+        }
 
         fclose($out);
         fclose($file);

Response.php

@@ -1221,6 +1221,7 @@ public static function closeOutputBuffers(int $targetLevel, bool $flush): void
         while ($level-- > $targetLevel && ($s = $status[$level]) && (!isset($s['del']) ? !isset($s['flags']) || ($s['flags'] & $flags) === $flags : $s['del'])) {
             if ($flush) {
                 ob_end_flush();
+                flush();
             } else {
                 ob_end_clean();
             }