Issue #1539 decode path in jar:file

jetty-util/src/main/java/org/eclipse/jetty/util/resource/JarFileResource.java

@@ -29,6 +29,7 @@ import java.util.List;
 import java.util.jar.JarEntry;
 import java.util.jar.JarFile;
 
+import org.eclipse.jetty.util.URIUtil;
 import org.eclipse.jetty.util.log.Log;
 import org.eclipse.jetty.util.log.Logger;
 
@@ -123,7 +124,7 @@ class JarFileResource extends JarResource
         
         int sep = _urlString.lastIndexOf("!/");
         _jarUrl=_urlString.substring(0,sep+2);
-        _path=_urlString.substring(sep+2);
+        _path=URIUtil.decodePath(_urlString.substring(sep+2));
         if (_path.length()==0)
             _path=null;   
         _jarFile=_jarConnection.getJarFile();

jetty-util/src/test/java/org/eclipse/jetty/util/resource/JarResourceTest.java

@@ -201,5 +201,13 @@ public class JarResourceTest
         assertFalse(dest.exists());
     }
 
+    @Test
+    public void testEncodedFileName()
+    throws Exception
+    {
+        String s = "jar:"+testResURI+"TestData/test.zip!/file%20name.txt";
+        Resource r = Resource.newResource(s);
+        assertTrue(r.exists());
+    }
 
 }