| // Copyright 2014 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| package org.chromium.url; |
| |
| import org.chromium.base.annotations.CalledByNative; |
| import org.chromium.base.annotations.JNINamespace; |
| |
| import java.net.IDN; |
| |
| /** |
| * This class is used to convert unicode IDN domain names to ASCII, when not |
| * building with ICU. |
| */ |
| @JNINamespace("url::android") |
| public class IDNStringUtil { |
| /** |
| * Attempts to convert a Unicode string to an ASCII string using IDN rules. |
| * As of May 2014, the underlying Java function IDNA2003. |
| * @param src String to convert. |
| * @return: String containing only ASCII characters on success, null on |
| * failure. |
| */ |
| @CalledByNative |
| private static String idnToASCII(String src) { |
| try { |
| return IDN.toASCII(src, IDN.USE_STD3_ASCII_RULES); |
| } catch (Exception e) { |
| return null; |
| } |
| } |
| } |