some basic path normalization

lib/filesystem.php

@@ -494,6 +494,28 @@ class OC_Filesystem{
 		}
 		OC_Connector_Sabre_Node::removeETagPropertyForPath($path);
 	}
+
+	public static function normalizePath($path){
+		//no windows style slashes
+		$path=str_replace('\\','/',$path);
+		//add leading slash
+		if($path[0]!=='/'){
+			$path='/'.$path;
+		}
+		//remove trainling slash
+		if(substr($path,-1,1)==='/'){
+			$path=substr($path,0,-1);
+		}
+		//remove duplicate slashes
+		while(strpos($path,'//')!==false){
+			$path=str_replace('//','/',$path);
+		}
+		//normalize unicode if possible
+		if(class_exists('Normalizer')){
+			$path=Normalizer::normalize($path);
+		}
+		return $path;
+	}
 }
 OC_Hook::connect('OC_Filesystem','post_write', 'OC_Filesystem','removeETagHook');
 OC_Hook::connect('OC_Filesystem','post_delete','OC_Filesystem','removeETagHook');

lib/filesystemview.php

@@ -54,10 +54,9 @@ class OC_FilesystemView {
 		if($path[0]!=='/'){
 			$path='/'.$path;
 		}
-		return $this->fakeRoot.$path;
+		return OC_Filesystem::normalizePath($this->fakeRoot.$path);
 	}
-
+	
-
 	/**
 	* change the root to a fake toor
 	* @param  string  fakeRoot

tests/lib/filesystem.php

@@ -59,6 +59,17 @@ class Test_Filesystem extends UnitTestCase{
 		$this->assertEqual('/',OC_Filesystem::getMountPoint('/some'));
 		$this->assertEqual('folder',OC_Filesystem::getInternalPath('/some/folder'));
 	}
+
+	public function testNormalize(){
+		$this->assertEqual('/path',OC_Filesystem::normalizePath('/path/'));
+		$this->assertEqual('/path',OC_Filesystem::normalizePath('path'));
+		$this->assertEqual('/path',OC_Filesystem::normalizePath('\path'));
+		$this->assertEqual('/foo/bar',OC_Filesystem::normalizePath('/foo//bar/'));
+		$this->assertEqual('/foo/bar',OC_Filesystem::normalizePath('/foo////bar'));
+		if(class_exists('Normalizer')){
+			$this->assertEqual("/foo/bar\xC3\xBC",OC_Filesystem::normalizePath("/foo/baru\xCC\x88"));
+		}
+	}
 }
 
 ?>