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297
java/org/apache/catalina/webresources/FileResource.java
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297
java/org/apache/catalina/webresources/FileResource.java
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/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.catalina.webresources;
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import java.io.ByteArrayInputStream;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileNotFoundException;
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import java.io.IOException;
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import java.io.InputStream;
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import java.net.MalformedURLException;
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import java.net.URL;
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import java.nio.charset.StandardCharsets;
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import java.nio.file.Files;
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import java.nio.file.attribute.BasicFileAttributes;
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import java.security.cert.Certificate;
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import java.util.jar.Manifest;
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import org.apache.catalina.WebResourceRoot;
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import org.apache.juli.logging.Log;
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import org.apache.juli.logging.LogFactory;
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/**
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* Represents a single resource (file or directory) that is located on a file
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* system.
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*/
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public class FileResource extends AbstractResource {
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private static final Log log = LogFactory.getLog(FileResource.class);
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private static final boolean PROPERTIES_NEED_CONVERT;
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static {
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boolean isEBCDIC = false;
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try {
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String encoding = System.getProperty("file.encoding");
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if (encoding.contains("EBCDIC")) {
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isEBCDIC = true;
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}
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} catch (SecurityException e) {
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// Ignore
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}
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PROPERTIES_NEED_CONVERT = isEBCDIC;
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}
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private final File resource;
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private final String name;
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private final boolean readOnly;
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private final Manifest manifest;
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private final boolean needConvert;
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public FileResource(WebResourceRoot root, String webAppPath,
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File resource, boolean readOnly, Manifest manifest) {
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super(root,webAppPath);
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this.resource = resource;
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if (webAppPath.charAt(webAppPath.length() - 1) == '/') {
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String realName = resource.getName() + '/';
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if (webAppPath.endsWith(realName)) {
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name = resource.getName();
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} else {
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// This is the root directory of a mounted ResourceSet
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// Need to return the mounted name, not the real name
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int endOfName = webAppPath.length() - 1;
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name = webAppPath.substring(
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webAppPath.lastIndexOf('/', endOfName - 1) + 1,
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endOfName);
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}
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} else {
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// Must be a file
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name = resource.getName();
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}
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this.readOnly = readOnly;
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this.manifest = manifest;
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this.needConvert = PROPERTIES_NEED_CONVERT && name.endsWith(".properties");
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}
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@Override
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public long getLastModified() {
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return resource.lastModified();
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}
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@Override
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public boolean exists() {
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return resource.exists();
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}
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@Override
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public boolean isVirtual() {
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return false;
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}
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@Override
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public boolean isDirectory() {
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return resource.isDirectory();
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}
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@Override
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public boolean isFile() {
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return resource.isFile();
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}
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@Override
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public boolean delete() {
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if (readOnly) {
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return false;
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}
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return resource.delete();
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}
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@Override
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public String getName() {
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return name;
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}
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@Override
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public long getContentLength() {
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return getContentLengthInternal(needConvert);
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}
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private long getContentLengthInternal(boolean convert) {
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if (convert) {
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byte[] content = getContent();
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if (content == null) {
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return -1;
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} else {
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return content.length;
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}
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}
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if (isDirectory()) {
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return -1;
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}
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return resource.length();
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}
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@Override
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public String getCanonicalPath() {
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try {
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return resource.getCanonicalPath();
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} catch (IOException ioe) {
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if (log.isDebugEnabled()) {
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log.debug(sm.getString("fileResource.getCanonicalPathFail",
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resource.getPath()), ioe);
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}
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return null;
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}
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}
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@Override
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public boolean canRead() {
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return resource.canRead();
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}
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@Override
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protected InputStream doGetInputStream() {
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if (needConvert) {
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byte[] content = getContent();
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if (content == null) {
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return null;
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} else {
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return new ByteArrayInputStream(content);
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}
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}
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try {
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return new FileInputStream(resource);
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} catch (FileNotFoundException fnfe) {
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// Race condition (file has been deleted) - not an error
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return null;
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}
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}
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@Override
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public final byte[] getContent() {
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// Use internal version to avoid loop when needConvert is true
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long len = getContentLengthInternal(false);
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if (len > Integer.MAX_VALUE) {
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// Can't create an array that big
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throw new ArrayIndexOutOfBoundsException(sm.getString(
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"abstractResource.getContentTooLarge", getWebappPath(),
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Long.valueOf(len)));
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}
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if (len < 0) {
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// Content is not applicable here (e.g. is a directory)
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return null;
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}
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int size = (int) len;
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byte[] result = new byte[size];
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int pos = 0;
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try (InputStream is = new FileInputStream(resource)) {
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while (pos < size) {
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int n = is.read(result, pos, size - pos);
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if (n < 0) {
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break;
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}
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pos += n;
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}
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} catch (IOException ioe) {
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if (getLog().isDebugEnabled()) {
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getLog().debug(sm.getString("abstractResource.getContentFail",
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getWebappPath()), ioe);
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}
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return null;
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}
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if (needConvert) {
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// Workaround for certain files on platforms that use
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// EBCDIC encoding, when they are read through FileInputStream.
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// See commit message of rev.303915 for original details
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// https://svn.apache.org/viewvc?view=revision&revision=303915
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String str = new String(result);
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try {
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result = str.getBytes(StandardCharsets.UTF_8);
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} catch (Exception e) {
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result = null;
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}
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}
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return result;
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}
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@Override
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public long getCreation() {
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try {
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BasicFileAttributes attrs = Files.readAttributes(resource.toPath(),
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BasicFileAttributes.class);
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return attrs.creationTime().toMillis();
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} catch (IOException e) {
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if (log.isDebugEnabled()) {
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log.debug(sm.getString("fileResource.getCreationFail",
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resource.getPath()), e);
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}
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return 0;
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}
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}
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@Override
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public URL getURL() {
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if (resource.exists()) {
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try {
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return resource.toURI().toURL();
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} catch (MalformedURLException e) {
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if (log.isDebugEnabled()) {
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log.debug(sm.getString("fileResource.getUrlFail",
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resource.getPath()), e);
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}
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return null;
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}
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} else {
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return null;
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}
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}
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@Override
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public URL getCodeBase() {
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if (getWebappPath().startsWith("/WEB-INF/classes/") && name.endsWith(".class")) {
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return getWebResourceRoot().getResource("/WEB-INF/classes/").getURL();
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} else {
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return getURL();
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}
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}
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@Override
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public Certificate[] getCertificates() {
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return null;
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}
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@Override
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public Manifest getManifest() {
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return manifest;
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}
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@Override
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protected Log getLog() {
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return log;
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}
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}
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