377 lines
12 KiB
Java
377 lines
12 KiB
Java
/*
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* Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package sun.net.www.protocol.jar;
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import java.io.InputStream;
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import java.io.IOException;
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import java.io.FileNotFoundException;
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import java.io.BufferedInputStream;
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import java.net.URL;
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import java.net.URLConnection;
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import java.net.MalformedURLException;
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import java.net.UnknownServiceException;
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import java.util.Enumeration;
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import java.util.Map;
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import java.util.List;
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import java.util.jar.JarEntry;
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import java.util.jar.JarFile;
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import java.util.jar.Manifest;
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import java.security.Permission;
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/**
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* @author Benjamin Renaud
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* @since 1.2
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*/
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public class JarURLConnection extends java.net.JarURLConnection {
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private static final boolean debug = false;
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/* the Jar file factory. It handles both retrieval and caching.
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*/
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private static final JarFileFactory factory = JarFileFactory.getInstance();
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/* the url for the Jar file */
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private URL jarFileURL;
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/* the permission to get this JAR file. This is the actual, ultimate,
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* permission, returned by the jar file factory.
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*/
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private Permission permission;
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/* the url connection for the JAR file */
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private URLConnection jarFileURLConnection;
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/* the entry name, if any */
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private String entryName;
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/* the JarEntry */
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private JarEntry jarEntry;
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/* the jar file corresponding to this connection */
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private JarFile jarFile;
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/* the content type for this connection */
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private String contentType;
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public JarURLConnection(URL url, Handler handler)
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throws MalformedURLException, IOException {
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super(url);
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jarFileURL = getJarFileURL();
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jarFileURLConnection = jarFileURL.openConnection();
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entryName = getEntryName();
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}
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public JarFile getJarFile() throws IOException {
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connect();
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return jarFile;
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}
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public JarEntry getJarEntry() throws IOException {
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connect();
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return jarEntry;
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}
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public Permission getPermission() throws IOException {
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return jarFileURLConnection.getPermission();
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}
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class JarURLInputStream extends java.io.FilterInputStream {
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JarURLInputStream (InputStream src) {
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super (src);
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}
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public void close () throws IOException {
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try {
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super.close();
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} finally {
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if (!getUseCaches()) {
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jarFile.close();
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}
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}
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}
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}
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public void connect() throws IOException {
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if (!connected) {
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/* the factory call will do the security checks */
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jarFile = factory.get(getJarFileURL(), getUseCaches());
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/* we also ask the factory the permission that was required
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* to get the jarFile, and set it as our permission.
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*/
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if (getUseCaches()) {
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boolean oldUseCaches = jarFileURLConnection.getUseCaches();
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jarFileURLConnection = factory.getConnection(jarFile);
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jarFileURLConnection.setUseCaches(oldUseCaches);
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}
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if ((entryName != null)) {
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jarEntry = (JarEntry)jarFile.getEntry(entryName);
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if (jarEntry == null) {
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try {
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if (!getUseCaches()) {
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jarFile.close();
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}
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} catch (Exception e) {
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}
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throw new FileNotFoundException("JAR entry " + entryName +
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" not found in " +
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jarFile.getName());
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}
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}
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connected = true;
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}
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}
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public InputStream getInputStream() throws IOException {
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connect();
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InputStream result = null;
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if (entryName == null) {
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throw new IOException("no entry name specified");
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} else {
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if (jarEntry == null) {
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throw new FileNotFoundException("JAR entry " + entryName +
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" not found in " +
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jarFile.getName());
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}
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result = new JarURLInputStream (jarFile.getInputStream(jarEntry));
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}
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return result;
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}
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public int getContentLength() {
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long result = getContentLengthLong();
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if (result > Integer.MAX_VALUE)
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return -1;
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return (int) result;
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}
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public long getContentLengthLong() {
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long result = -1;
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try {
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connect();
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if (jarEntry == null) {
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/* if the URL referes to an archive */
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result = jarFileURLConnection.getContentLengthLong();
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} else {
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/* if the URL referes to an archive entry */
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result = getJarEntry().getSize();
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}
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} catch (IOException e) {
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}
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return result;
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}
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public Object getContent() throws IOException {
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Object result = null;
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connect();
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if (entryName == null) {
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result = jarFile;
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} else {
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result = super.getContent();
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}
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return result;
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}
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public String getContentType() {
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if (contentType == null) {
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if (entryName == null) {
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contentType = "x-java/jar";
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} else {
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try {
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connect();
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InputStream in = jarFile.getInputStream(jarEntry);
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contentType = guessContentTypeFromStream(
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new BufferedInputStream(in));
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in.close();
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} catch (IOException e) {
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// don't do anything
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}
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}
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if (contentType == null) {
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contentType = guessContentTypeFromName(entryName);
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}
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if (contentType == null) {
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contentType = "content/unknown";
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}
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}
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return contentType;
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}
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public String getHeaderField(String name) {
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return jarFileURLConnection.getHeaderField(name);
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}
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/**
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* Sets the general request property.
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*
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* @param key the keyword by which the request is known
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* (e.g., "<code>accept</code>").
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* @param value the value associated with it.
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*/
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public void setRequestProperty(String key, String value) {
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jarFileURLConnection.setRequestProperty(key, value);
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}
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/**
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* Returns the value of the named general request property for this
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* connection.
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*
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* @return the value of the named general request property for this
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* connection.
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*/
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public String getRequestProperty(String key) {
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return jarFileURLConnection.getRequestProperty(key);
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}
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/**
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* Adds a general request property specified by a
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* key-value pair. This method will not overwrite
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* existing values associated with the same key.
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*
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* @param key the keyword by which the request is known
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* (e.g., "<code>accept</code>").
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* @param value the value associated with it.
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*/
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public void addRequestProperty(String key, String value) {
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jarFileURLConnection.addRequestProperty(key, value);
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}
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/**
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* Returns an unmodifiable Map of general request
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* properties for this connection. The Map keys
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* are Strings that represent the request-header
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* field names. Each Map value is a unmodifiable List
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* of Strings that represents the corresponding
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* field values.
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*
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* @return a Map of the general request properties for this connection.
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*/
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public Map<String,List<String>> getRequestProperties() {
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return jarFileURLConnection.getRequestProperties();
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}
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/**
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* Set the value of the <code>allowUserInteraction</code> field of
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* this <code>URLConnection</code>.
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*
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* @param allowuserinteraction the new value.
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* @see java.net.URLConnection#allowUserInteraction
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*/
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public void setAllowUserInteraction(boolean allowuserinteraction) {
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jarFileURLConnection.setAllowUserInteraction(allowuserinteraction);
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}
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/**
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* Returns the value of the <code>allowUserInteraction</code> field for
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* this object.
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*
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* @return the value of the <code>allowUserInteraction</code> field for
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* this object.
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* @see java.net.URLConnection#allowUserInteraction
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*/
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public boolean getAllowUserInteraction() {
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return jarFileURLConnection.getAllowUserInteraction();
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}
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/*
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* cache control
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*/
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/**
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* Sets the value of the <code>useCaches</code> field of this
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* <code>URLConnection</code> to the specified value.
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* <p>
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* Some protocols do caching of documents. Occasionally, it is important
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* to be able to "tunnel through" and ignore the caches (e.g., the
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* "reload" button in a browser). If the UseCaches flag on a connection
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* is true, the connection is allowed to use whatever caches it can.
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* If false, caches are to be ignored.
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* The default value comes from DefaultUseCaches, which defaults to
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* true.
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*
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* @see java.net.URLConnection#useCaches
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*/
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public void setUseCaches(boolean usecaches) {
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jarFileURLConnection.setUseCaches(usecaches);
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}
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/**
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* Returns the value of this <code>URLConnection</code>'s
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* <code>useCaches</code> field.
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*
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* @return the value of this <code>URLConnection</code>'s
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* <code>useCaches</code> field.
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* @see java.net.URLConnection#useCaches
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*/
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public boolean getUseCaches() {
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return jarFileURLConnection.getUseCaches();
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}
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/**
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* Sets the value of the <code>ifModifiedSince</code> field of
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* this <code>URLConnection</code> to the specified value.
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*
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* @param value the new value.
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* @see java.net.URLConnection#ifModifiedSince
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*/
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public void setIfModifiedSince(long ifmodifiedsince) {
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jarFileURLConnection.setIfModifiedSince(ifmodifiedsince);
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}
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/**
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* Sets the default value of the <code>useCaches</code> field to the
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* specified value.
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*
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* @param defaultusecaches the new value.
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* @see java.net.URLConnection#useCaches
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*/
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public void setDefaultUseCaches(boolean defaultusecaches) {
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jarFileURLConnection.setDefaultUseCaches(defaultusecaches);
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}
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/**
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* Returns the default value of a <code>URLConnection</code>'s
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* <code>useCaches</code> flag.
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* <p>
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* Ths default is "sticky", being a part of the static state of all
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* URLConnections. This flag applies to the next, and all following
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* URLConnections that are created.
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*
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* @return the default value of a <code>URLConnection</code>'s
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* <code>useCaches</code> flag.
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* @see java.net.URLConnection#useCaches
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*/
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public boolean getDefaultUseCaches() {
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return jarFileURLConnection.getDefaultUseCaches();
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}
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}
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