| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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.apache.catalina.webresources; |
| |
| import java.io.InputStream; |
| import java.util.Date; |
| |
| import org.apache.catalina.WebResource; |
| import org.apache.catalina.WebResourceRoot; |
| import org.apache.catalina.util.ConcurrentDateFormat; |
| import org.apache.juli.logging.Log; |
| import org.apache.tomcat.util.res.StringManager; |
| |
| public abstract class AbstractResource implements WebResource { |
| |
| protected static final StringManager sm = StringManager.getManager(AbstractResource.class); |
| |
| private final WebResourceRoot root; |
| private final String webAppPath; |
| |
| private String mimeType = null; |
| private volatile String weakETag; |
| |
| |
| protected AbstractResource(WebResourceRoot root, String webAppPath) { |
| this.root = root; |
| this.webAppPath = webAppPath; |
| } |
| |
| |
| @Override |
| public final WebResourceRoot getWebResourceRoot() { |
| return root; |
| } |
| |
| |
| @Override |
| public final String getWebappPath() { |
| return webAppPath; |
| } |
| |
| |
| @Override |
| public final String getLastModifiedHttp() { |
| return ConcurrentDateFormat.formatRfc1123(new Date(getLastModified())); |
| } |
| |
| @Override |
| public final String getETag() { |
| if (weakETag == null) { |
| synchronized (this) { |
| if (weakETag == null) { |
| long contentLength = getContentLength(); |
| long lastModified = getLastModified(); |
| if ((contentLength >= 0) || (lastModified >= 0)) { |
| weakETag = "W/\"" + contentLength + "-" + |
| lastModified + "\""; |
| } |
| } |
| } |
| } |
| return weakETag; |
| } |
| |
| @Override |
| public final void setMimeType(String mimeType) { |
| this.mimeType = mimeType; |
| } |
| |
| |
| @Override |
| public final String getMimeType() { |
| return mimeType; |
| } |
| |
| |
| @Override |
| public final InputStream getInputStream() { |
| InputStream is = doGetInputStream(); |
| |
| if (is == null || !root.getTrackLockedFiles()) { |
| return is; |
| } |
| |
| return new TrackedInputStream(root, getName(), is); |
| } |
| |
| protected abstract InputStream doGetInputStream(); |
| |
| |
| protected abstract Log getLog(); |
| } |