spring AbstractPrefixVersionStrategy 源码
spring AbstractPrefixVersionStrategy 代码
文件路径：/spring-webflux/src/main/java/org/springframework/web/reactive/resource/AbstractPrefixVersionStrategy.java
/*
* Copyright 2002-2018 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 org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.util.Assert;
/**
* Abstract base class for {@link VersionStrategy} implementations that insert
* a prefix into the URL path, e.g. "version/static/myresource.js".
*
* @author Rossen Stoyanchev
* @author Brian Clozel
* @since 5.0
*/
public abstract class AbstractPrefixVersionStrategy implements VersionStrategy {
protected final Log logger = LogFactory.getLog(getClass());
private final String prefix;
protected AbstractPrefixVersionStrategy(String version) {
Assert.hasText(version, "Version must not be empty");
this.prefix = version;
}
@Override
public String extractVersion(String requestPath) {
return (requestPath.startsWith(this.prefix) ? this.prefix : null);
}
@Override
public String removeVersion(String requestPath, String version) {
return requestPath.substring(this.prefix.length());
}
@Override
public String addVersion(String path, String version) {
if (path.startsWith(".")) {
return path;
}
else if (this.prefix.endsWith("/") || path.startsWith("/")) {
return this.prefix + path;
}
else {
return this.prefix + '/' + path;
}
}
}
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