diff --git a/src/Components/DataPath.php b/src/Components/DataPath.php
index 0ad74d975..6e6020ca2 100644
--- a/src/Components/DataPath.php
+++ b/src/Components/DataPath.php
@@ -44,6 +44,17 @@ class DataPath extends Path implements DataPathInterface
         'data' => '',
     ];
 
+    protected static $topLevelMimeTypes = [
+        'application' => 1,
+        'audio' => 1,
+        'example' => 1,
+        'image' => 1,
+        'message' => 1,
+        'model' => 1,
+        'multipart' => 1,
+        'text' => 1,
+        'video' => 1,
+    ];
 
     /**
      * @inheritdoc
@@ -207,9 +218,10 @@ public static function createFromPath($path)
             throw new RuntimeException(sprintf('The specified file `%s` is not readable', $path));
         }
 
-        $data = file_get_contents($path);
-        $res = (new \finfo(FILEINFO_MIME))->file($path);
-        return new static($res.';'.static::BINARY_PARAMETER.','.base64_encode($data));
+        $res = str_replace(' ', '', (new \finfo(FILEINFO_MIME))->file($path));
+        $path = $res.';'.static::BINARY_PARAMETER.','.base64_encode(file_get_contents($path));
+
+        return new static($path);
     }
 
     /**
@@ -265,7 +277,7 @@ protected function validate($path)
         $this->filterData($matches['data'], $extracts['isBinaryData']);
 
         return [
-            'mimetype' => $mimeType,
+            'mimetype' => strtolower($mimeType),
             'parameters' => explode(';', $extracts['parameters']),
             'isBinaryData' => $extracts['isBinaryData'],
             'data' => $matches['data'],
@@ -281,7 +293,12 @@ protected function validate($path)
      */
     protected function filterMimeType($mimeType)
     {
-        if (!preg_match(',^[a-z-\/+]+$,i', $mimeType)) {
+        $res = explode('/', strtolower($mimeType), 2);
+        $type = array_shift($res);
+        $subtype = array_shift($res);
+        if (!isset(static::$topLevelMimeTypes[$type])
+            || !preg_match(',^[a-z+][a-z0-9\.]+$,i', $subtype)
+        ) {
             throw new InvalidArgumentException(sprintf('invalid mimeType, `%s`', $mimeType));
         }
     }