org.apache.inlong.sort.filesystem.shaded.com.amazonaws.util.HostnameValidator Maven / Gradle / Ivy
/*
* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file 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.
*/
package com.amazonaws.util;
import com.amazonaws.annotation.SdkProtectedApi;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
@SdkProtectedApi
public final class HostnameValidator {
private HostnameValidator() {
}
private static final Pattern HOSTNAME_COMPLIANT_PATTERN = Pattern.compile("[A-Za-z0-9\\-]+");
private static final int HOSTNAME_MAX_LENGTH = 63;
/**
* Validates that a hostname component is compliant.
* @param hostnameComponent the hostname component to check
* @param paramName the name of the param or field being checked
* @param object the object containing the hostname component
*/
public static void validateHostnameCompliant(String hostnameComponent, String paramName, String object) {
if (StringUtils.isNullOrEmpty(hostnameComponent)) {
throw new IllegalArgumentException(
String.format("The provided %s is not valid: the required '%s' "
+ "component is missing.", object, paramName));
}
if (hostnameComponent.length() > HOSTNAME_MAX_LENGTH) {
throw new IllegalArgumentException(
String.format("The provided %s is not valid: the '%s' "
+ "component exceeds the maximum length of %d characters.", object, paramName, HOSTNAME_MAX_LENGTH));
}
Matcher m = HOSTNAME_COMPLIANT_PATTERN.matcher(hostnameComponent);
if (!m.matches()) {
throw new IllegalArgumentException(
String.format("The provided %s is not valid: the '%s' "
+ "component must only contain alphanumeric characters and dashes.", object, paramName));
}
}
}