rev 52310 : 8213031: (zipfs) Add support for POSIX file permissions
1 /* 2 * Copyright (c) 2009, 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package jdk.nio.zipfs; 27 28 import java.io.*; 29 import java.nio.channels.*; 30 import java.nio.file.*; 31 import java.nio.file.DirectoryStream.Filter; 32 import java.nio.file.attribute.*; 33 import java.nio.file.spi.FileSystemProvider; 34 import java.net.URI; 35 import java.net.URISyntaxException; 36 import java.util.HashMap; 37 import java.util.Map; 38 import java.util.Set; 39 import java.util.zip.ZipException; 40 import java.util.concurrent.ExecutorService; 41 42 /* 43 * 44 * @author Xueming Shen, Rajendra Gutupalli, Jaya Hangal 45 */ 46 47 public class ZipFileSystemProvider extends FileSystemProvider { 48 49 50 private final Map<Path, ZipFileSystem> filesystems = new HashMap<>(); 51 52 public ZipFileSystemProvider() {} 53 54 @Override 55 public String getScheme() { 56 return "jar"; 57 } 58 59 protected Path uriToPath(URI uri) { 60 String scheme = uri.getScheme(); 61 if ((scheme == null) || !scheme.equalsIgnoreCase(getScheme())) { 62 throw new IllegalArgumentException("URI scheme is not '" + getScheme() + "'"); 63 } 64 try { 65 // only support legacy JAR URL syntax jar:{uri}!/{entry} for now 66 String spec = uri.getRawSchemeSpecificPart(); 67 int sep = spec.indexOf("!/"); 68 if (sep != -1) { 69 spec = spec.substring(0, sep); 70 } 71 return Paths.get(new URI(spec)).toAbsolutePath(); 72 } catch (URISyntaxException e) { 73 throw new IllegalArgumentException(e.getMessage(), e); 74 } 75 } 76 77 private boolean ensureFile(Path path) { 78 try { 79 BasicFileAttributes attrs = 80 Files.readAttributes(path, BasicFileAttributes.class); 81 if (!attrs.isRegularFile()) 82 throw new UnsupportedOperationException(); 83 return true; 84 } catch (IOException ioe) { 85 return false; 86 } 87 } 88 89 @Override 90 public FileSystem newFileSystem(URI uri, Map<String, ?> env) 91 throws IOException 92 { 93 Path path = uriToPath(uri); 94 synchronized(filesystems) { 95 Path realPath = null; 96 if (ensureFile(path)) { 97 realPath = path.toRealPath(); 98 if (filesystems.containsKey(realPath)) 99 throw new FileSystemAlreadyExistsException(); 100 } 101 ZipFileSystem zipfs = null; 102 try { 103 if (env.containsKey("multi-release")) { 104 zipfs = new JarFileSystem(this, path, env); 105 } else { 106 zipfs = new ZipFileSystem(this, path, env); 107 } 108 } catch (ZipException ze) { 109 String pname = path.toString(); 110 if (pname.endsWith(".zip") || pname.endsWith(".jar")) 111 throw ze; 112 // assume NOT a zip/jar file 113 throw new UnsupportedOperationException(); 114 } 115 if (realPath == null) { // newly created 116 realPath = path.toRealPath(); 117 } 118 filesystems.put(realPath, zipfs); 119 return zipfs; 120 } 121 } 122 123 @Override 124 public FileSystem newFileSystem(Path path, Map<String, ?> env) 125 throws IOException 126 { 127 ensureFile(path); 128 try { 129 ZipFileSystem zipfs; 130 if (env.containsKey("multi-release")) { 131 zipfs = new JarFileSystem(this, path, env); 132 } else { 133 zipfs = new ZipFileSystem(this, path, env); 134 } 135 return zipfs; 136 } catch (ZipException ze) { 137 String pname = path.toString(); 138 if (pname.endsWith(".zip") || pname.endsWith(".jar")) 139 throw ze; 140 throw new UnsupportedOperationException(); 141 } 142 } 143 144 @Override 145 public Path getPath(URI uri) { 146 String spec = uri.getSchemeSpecificPart(); 147 int sep = spec.indexOf("!/"); 148 if (sep == -1) 149 throw new IllegalArgumentException("URI: " 150 + uri 151 + " does not contain path info ex. jar:file:/c:/foo.zip!/BAR"); 152 return getFileSystem(uri).getPath(spec.substring(sep + 1)); 153 } 154 155 156 @Override 157 public FileSystem getFileSystem(URI uri) { 158 synchronized (filesystems) { 159 ZipFileSystem zipfs = null; 160 try { 161 zipfs = filesystems.get(uriToPath(uri).toRealPath()); 162 } catch (IOException x) { 163 // ignore the ioe from toRealPath(), return FSNFE 164 } 165 if (zipfs == null) 166 throw new FileSystemNotFoundException(); 167 return zipfs; 168 } 169 } 170 171 // Checks that the given file is a UnixPath 172 static final ZipPath toZipPath(Path path) { 173 if (path == null) 174 throw new NullPointerException(); 175 if (!(path instanceof ZipPath)) 176 throw new ProviderMismatchException(); 177 return (ZipPath)path; 178 } 179 180 @Override 181 public void checkAccess(Path path, AccessMode... modes) throws IOException { 182 toZipPath(path).checkAccess(modes); 183 } 184 185 @Override 186 public void copy(Path src, Path target, CopyOption... options) 187 throws IOException 188 { 189 toZipPath(src).copy(toZipPath(target), options); 190 } 191 192 @Override 193 public void createDirectory(Path path, FileAttribute<?>... attrs) 194 throws IOException 195 { 196 toZipPath(path).createDirectory(attrs); 197 } 198 199 @Override 200 public final void delete(Path path) throws IOException { 201 toZipPath(path).delete(); 202 } 203 204 @Override 205 @SuppressWarnings("unchecked") 206 public <V extends FileAttributeView> V 207 getFileAttributeView(Path path, Class<V> type, LinkOption... options) 208 { 209 return ZipFileAttributeView.get(toZipPath(path), type); 210 } 211 212 @Override 213 public FileStore getFileStore(Path path) throws IOException { 214 return toZipPath(path).getFileStore(); 215 } 216 217 @Override 218 public boolean isHidden(Path path) { 219 return toZipPath(path).isHidden(); 220 } 221 222 @Override 223 public boolean isSameFile(Path path, Path other) throws IOException { 224 return toZipPath(path).isSameFile(other); 225 } 226 227 @Override 228 public void move(Path src, Path target, CopyOption... options) 229 throws IOException 230 { 231 toZipPath(src).move(toZipPath(target), options); 232 } 233 234 @Override 235 public AsynchronousFileChannel newAsynchronousFileChannel(Path path, 236 Set<? extends OpenOption> options, 237 ExecutorService exec, 238 FileAttribute<?>... attrs) 239 throws IOException 240 { 241 throw new UnsupportedOperationException(); 242 } 243 244 @Override 245 public SeekableByteChannel newByteChannel(Path path, 246 Set<? extends OpenOption> options, 247 FileAttribute<?>... attrs) 248 throws IOException 249 { 250 return toZipPath(path).newByteChannel(options, attrs); 251 } 252 253 @Override 254 public DirectoryStream<Path> newDirectoryStream( 255 Path path, Filter<? super Path> filter) throws IOException 256 { 257 return toZipPath(path).newDirectoryStream(filter); 258 } 259 260 @Override 261 public FileChannel newFileChannel(Path path, 262 Set<? extends OpenOption> options, 263 FileAttribute<?>... attrs) 264 throws IOException 265 { 266 return toZipPath(path).newFileChannel(options, attrs); 267 } 268 269 @Override 270 public InputStream newInputStream(Path path, OpenOption... options) 271 throws IOException 272 { 273 return toZipPath(path).newInputStream(options); 274 } 275 276 @Override 277 public OutputStream newOutputStream(Path path, OpenOption... options) 278 throws IOException 279 { 280 return toZipPath(path).newOutputStream(options); 281 } 282 283 @Override 284 @SuppressWarnings("unchecked") // Cast to A 285 public <A extends BasicFileAttributes> A 286 readAttributes(Path path, Class<A> type, LinkOption... options) 287 throws IOException 288 { 289 if (type == BasicFileAttributes.class || type == ZipFileAttributes.class) 290 return (A)toZipPath(path).getAttributes(); 291 return null; 292 } 293 294 @Override 295 public Map<String, Object> 296 readAttributes(Path path, String attribute, LinkOption... options) 297 throws IOException 298 { 299 return toZipPath(path).readAttributes(attribute, options); 300 } 301 302 @Override 303 public Path readSymbolicLink(Path link) throws IOException { 304 throw new UnsupportedOperationException("Not supported."); 305 } 306 307 @Override 308 public void setAttribute(Path path, String attribute, 309 Object value, LinkOption... options) 310 throws IOException 311 { 312 toZipPath(path).setAttribute(attribute, value, options); 313 } 314 315 ////////////////////////////////////////////////////////////// 316 void removeFileSystem(Path zfpath, ZipFileSystem zfs) throws IOException { 317 synchronized (filesystems) { 318 zfpath = zfpath.toRealPath(); 319 if (filesystems.get(zfpath) == zfs) 320 filesystems.remove(zfpath); 321 } 322 } 323 } --- EOF ---