Mimetype detection for hidden files

Signed-off-by: Magnus Walbeck <mw@mwalbeck.org>

lib/private/Files/Type/Detection.php

@@ -167,6 +167,12 @@ class Detection implements IMimeTypeDetector {
 		$this->loadMappings();
 
 		$fileName = basename($path);
+
+		// remove leading dot on hidden files with a file extension
+		if (strpos($fileName, '.') === 0 && strpos($fileName, '.', 1)) {
+			$fileName = substr($fileName, 1);
+		}
+
 		// note: leading dot doesn't qualify as extension
 		if (strpos($fileName, '.') > 0) {
 			//try to guess the type by the file extension

tests/lib/Files/Type/DetectionTest.php

@@ -74,9 +74,13 @@ class DetectionTest extends \Test\TestCase {
 		$this->assertEquals('text/plain', $this->detection->detectPath('foo.txt'));
 		$this->assertEquals('image/png', $this->detection->detectPath('foo.png'));
 		$this->assertEquals('image/png', $this->detection->detectPath('foo.bar.png'));
+		$this->assertEquals('image/png', $this->detection->detectPath('.hidden.png'));
+		$this->assertEquals('image/png', $this->detection->detectPath('.hidden.foo.png'));
 		$this->assertEquals('image/png', $this->detection->detectPath('.hidden/foo.png'));
+		$this->assertEquals('image/png', $this->detection->detectPath('.hidden/.hidden.png'));
 		$this->assertEquals('image/png', $this->detection->detectPath('test.jpg/foo.png'));
 		$this->assertEquals('application/octet-stream', $this->detection->detectPath('.png'));
+		$this->assertEquals('application/octet-stream', $this->detection->detectPath('..hidden'));
 		$this->assertEquals('application/octet-stream', $this->detection->detectPath('foo'));
 		$this->assertEquals('application/octet-stream', $this->detection->detectPath(''));
 	}