org.springframework.security.web.header.writers.frameoptions.RegExpAllowFromStrategy Maven / Gradle / Ivy
/*
* Copyright 2002-2016 the original author or authors.
*
* 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.
*/
package org.springframework.security.web.header.writers.frameoptions;
import org.springframework.util.Assert;
import java.util.regex.Pattern;
/**
* Implementation which uses a regular expression to validate the supplied origin. If the
* value of the HTTP parameter matches the pattern, then the result will be ALLOW-FROM
* <paramter-value>.
*
* @author Marten Deinum
* @since 3.2
*/
public final class RegExpAllowFromStrategy extends
AbstractRequestParameterAllowFromStrategy {
private final Pattern pattern;
/**
* Creates a new instance
*
* @param pattern the Pattern to compare against the HTTP parameter value. If the
* pattern matches, the domain will be allowed, else denied.
*/
public RegExpAllowFromStrategy(String pattern) {
Assert.hasText(pattern, "Pattern cannot be empty.");
this.pattern = Pattern.compile(pattern);
}
@Override
protected boolean allowed(String allowFromOrigin) {
return pattern.matcher(allowFromOrigin).matches();
}
}