Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Copyright (C) 2012 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import java.net.IDN;

import java.util.Locale;

public class Main {
    public static String domainToAscii(String input) {
        try {
            String result = IDN.toASCII(input).toLowerCase(Locale.US);
            if (result.isEmpty())
                return null;
            if (containsInvalidHostnameAsciiCodes(result)) {
                return null;
            }
            return result;
        } catch (IllegalArgumentException e) {
            return null;
        }
    }

    private static boolean containsInvalidHostnameAsciiCodes(String hostnameAscii) {
        for (int i = 0; i < hostnameAscii.length(); i++) {
            char c = hostnameAscii.charAt(i);
            if (c <= '\u001f' || c >= '\u007f') {
                return true;
            }
            if (" #%/:?@[\\]".indexOf(c) != -1) {
                return true;
            }
        }
        return false;
    }
}