spring AbstractFileNameVersionStrategy 源码
spring AbstractFileNameVersionStrategy 代码
文件路径：/spring-webflux/src/main/java/org/springframework/web/reactive/resource/AbstractFileNameVersionStrategy.java
/*
* 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
*
* https://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.web.reactive.resource;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.util.StringUtils;
/**
* Abstract base class for filename suffix based {@link VersionStrategy}
* implementations, e.g. "static/myresource-version.js"
*
* @author Rossen Stoyanchev
* @author Brian Clozel
* @since 5.0
*/
public abstract class AbstractFileNameVersionStrategy implements VersionStrategy {
protected final Log logger = LogFactory.getLog(getClass());
private static final Pattern pattern = Pattern.compile("-(\\S*)\\.");
@Override
public String extractVersion(String requestPath) {
Matcher matcher = pattern.matcher(requestPath);
if (matcher.find()) {
String match = matcher.group(1);
return (match.contains("-") ? match.substring(match.lastIndexOf('-') + 1) : match);
}
else {
return null;
}
}
@Override
public String removeVersion(String requestPath, String version) {
return StringUtils.delete(requestPath, "-" + version);
}
@Override
public String addVersion(String requestPath, String version) {
String baseFilename = StringUtils.stripFilenameExtension(requestPath);
String extension = StringUtils.getFilenameExtension(requestPath);
return (baseFilename + '-' + version + '.' + extension);
}
}
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