[HttpFoundation] made FileBinaryMimeTypeGuesser command configurable

CHANGELOG-2.1.md

@@ -24,6 +24,7 @@ To get the diff between two versions, go to https://github.com/symfony/symfony/c
 
 ### HttpFoundation
 
+ * made FileBinaryMimeTypeGuesser command configurable
  * added Request::getUser() and Request::getPassword()
  * added support for the PATCH method in Request
  * removed the ContentTypeMimeTypeGuesser class as it is deprecated and never used on PHP 5.3

src/Symfony/Component/HttpFoundation/File/MimeType/FileBinaryMimeTypeGuesser.php

@@ -21,6 +21,23 @@ use Symfony\Component\HttpFoundation\File\Exception\AccessDeniedException;
  */
 class FileBinaryMimeTypeGuesser implements MimeTypeGuesserInterface
 {
+    private $cmd;
+
+    /**
+     * Constructor.
+     *
+     * The $cmd pattern must contain a "%s" string that will be replaced
+     * with the file name to guess.
+     *
+     * The command output must start with the mime type of the file.
+     *
+     * @param string $cmd The command to run to get the mime type of a file
+     */
+    public function __construct($cmd = 'file -b --mime %s 2>/dev/null')
+    {
+        $this->cmd = $cmd;
+    }
+
     /**
      * Returns whether this guesser is supported on the current OS
      *
@@ -52,7 +69,7 @@ class FileBinaryMimeTypeGuesser implements MimeTypeGuesserInterface
         ob_start();
 
         // need to use --mime instead of -i. see #6641
-        passthru(sprintf('file -b --mime %s 2>/dev/null', escapeshellarg($path)), $return);
+        passthru(sprintf($this->cmd, escapeshellarg($path)), $return);
         if ($return > 0) {
             ob_end_clean();