1 /* 2 * Copyright (c) 2009, 2020, 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.BufferedOutputStream; 29 import java.io.ByteArrayInputStream; 30 import java.io.ByteArrayOutputStream; 31 import java.io.EOFException; 32 import java.io.FilterOutputStream; 33 import java.io.IOException; 34 import java.io.InputStream; 35 import java.io.OutputStream; 36 import java.lang.Runtime.Version; 37 import java.nio.ByteBuffer; 38 import java.nio.MappedByteBuffer; 39 import java.nio.channels.FileChannel; 40 import java.nio.channels.FileLock; 41 import java.nio.channels.ReadableByteChannel; 42 import java.nio.channels.SeekableByteChannel; 43 import java.nio.channels.WritableByteChannel; 44 import java.nio.file.*; 45 import java.nio.file.attribute.*; 46 import java.nio.file.spi.FileSystemProvider; 47 import java.security.AccessController; 48 import java.security.PrivilegedAction; 49 import java.security.PrivilegedActionException; 50 import java.security.PrivilegedExceptionAction; 51 import java.util.*; 52 import java.util.concurrent.locks.ReadWriteLock; 53 import java.util.concurrent.locks.ReentrantReadWriteLock; 54 import java.util.function.Consumer; 55 import java.util.function.Function; 56 import java.util.jar.Attributes; 57 import java.util.jar.Manifest; 58 import java.util.regex.Pattern; 59 import java.util.zip.CRC32; 60 import java.util.zip.Deflater; 61 import java.util.zip.DeflaterOutputStream; 62 import java.util.zip.Inflater; 63 import java.util.zip.InflaterInputStream; 64 import java.util.zip.ZipException; 65 66 import static java.lang.Boolean.TRUE; 67 import static java.nio.file.StandardCopyOption.COPY_ATTRIBUTES; 68 import static java.nio.file.StandardCopyOption.REPLACE_EXISTING; 69 import static java.nio.file.StandardOpenOption.APPEND; 70 import static java.nio.file.StandardOpenOption.CREATE; 71 import static java.nio.file.StandardOpenOption.CREATE_NEW; 72 import static java.nio.file.StandardOpenOption.READ; 73 import static java.nio.file.StandardOpenOption.TRUNCATE_EXISTING; 74 import static java.nio.file.StandardOpenOption.WRITE; 75 import static jdk.nio.zipfs.ZipConstants.*; 76 import static jdk.nio.zipfs.ZipUtils.*; 77 78 /** 79 * A FileSystem built on a zip file 80 * 81 * @author Xueming Shen 82 */ 83 class ZipFileSystem extends FileSystem { 84 // statics 85 private static final boolean isWindows = AccessController.doPrivileged( 86 (PrivilegedAction<Boolean>)()->System.getProperty("os.name") 87 .startsWith("Windows")); 88 private static final byte[] ROOTPATH = new byte[] { '/' }; 89 private static final String PROPERTY_POSIX = "enablePosixFileAttributes"; 90 private static final String PROPERTY_DEFAULT_OWNER = "defaultOwner"; 91 private static final String PROPERTY_DEFAULT_GROUP = "defaultGroup"; 92 private static final String PROPERTY_DEFAULT_PERMISSIONS = "defaultPermissions"; 93 // Property used to specify the entry version to use for a multi-release JAR 94 private static final String PROPERTY_RELEASE_VERSION = "releaseVersion"; 95 // Original property used to specify the entry version to use for a 96 // multi-release JAR which is kept for backwards compatibility. 97 private static final String PROPERTY_MULTI_RELEASE = "multi-release"; 98 99 private static final Set<PosixFilePermission> DEFAULT_PERMISSIONS = 100 PosixFilePermissions.fromString("rwxrwxrwx"); 101 // Property used to specify the compression mode to use 102 private static final String PROPERTY_COMPRESSION_METHOD = "compressionMethod"; 103 // Value specified for compressionMethod property to compress Zip entries 104 private static final String COMPRESSION_METHOD_DEFLATED = "DEFLATED"; 105 // Value specified for compressionMethod property to not compress Zip entries 106 private static final String COMPRESSION_METHOD_STORED = "STORED"; 107 108 private final ZipFileSystemProvider provider; 109 private final Path zfpath; 110 final ZipCoder zc; 111 private final ZipPath rootdir; 112 private boolean readOnly; // readonly file system, false by default 113 114 // default time stamp for pseudo entries 115 private final long zfsDefaultTimeStamp = System.currentTimeMillis(); 116 117 // configurable by env map 118 private final boolean noExtt; // see readExtra() 119 private final boolean useTempFile; // use a temp file for newOS, default 120 // is to use BAOS for better performance 121 private final boolean forceEnd64; 122 private final int defaultCompressionMethod; // METHOD_STORED if "noCompression=true" 123 // METHOD_DEFLATED otherwise 124 125 // entryLookup is identity by default, will be overridden for multi-release jars 126 private Function<byte[], byte[]> entryLookup = Function.identity(); 127 128 // POSIX support 129 final boolean supportPosix; 130 private final UserPrincipal defaultOwner; 131 private final GroupPrincipal defaultGroup; 132 private final Set<PosixFilePermission> defaultPermissions; 133 134 private final Set<String> supportedFileAttributeViews; 135 136 ZipFileSystem(ZipFileSystemProvider provider, 137 Path zfpath, 138 Map<String, ?> env) throws IOException 139 { 140 // default encoding for name/comment 141 String nameEncoding = env.containsKey("encoding") ? 142 (String)env.get("encoding") : "UTF-8"; 143 this.noExtt = "false".equals(env.get("zipinfo-time")); 144 this.useTempFile = isTrue(env, "useTempFile"); 145 this.forceEnd64 = isTrue(env, "forceZIP64End"); 146 this.defaultCompressionMethod = getDefaultCompressionMethod(env); 147 this.supportPosix = isTrue(env, PROPERTY_POSIX); 148 this.defaultOwner = initOwner(zfpath, env); 149 this.defaultGroup = initGroup(zfpath, env); 150 this.defaultPermissions = initPermissions(env); 151 this.supportedFileAttributeViews = supportPosix ? 152 Set.of("basic", "posix", "zip") : Set.of("basic", "zip"); 153 if (Files.notExists(zfpath)) { 154 // create a new zip if it doesn't exist 155 if (isTrue(env, "create")) { 156 try (OutputStream os = Files.newOutputStream(zfpath, CREATE_NEW, WRITE)) { 157 new END().write(os, 0, forceEnd64); 158 } 159 } else { 160 throw new NoSuchFileException(zfpath.toString()); 161 } 162 } 163 // sm and existence check 164 zfpath.getFileSystem().provider().checkAccess(zfpath, AccessMode.READ); 165 boolean writeable = AccessController.doPrivileged( 166 (PrivilegedAction<Boolean>)()->Files.isWritable(zfpath)); 167 this.readOnly = !writeable; 168 this.zc = ZipCoder.get(nameEncoding); 169 this.rootdir = new ZipPath(this, new byte[]{'/'}); 170 this.ch = Files.newByteChannel(zfpath, READ); 171 try { 172 this.cen = initCEN(); 173 } catch (IOException x) { 174 try { 175 this.ch.close(); 176 } catch (IOException xx) { 177 x.addSuppressed(xx); 178 } 179 throw x; 180 } 181 this.provider = provider; 182 this.zfpath = zfpath; 183 184 initializeReleaseVersion(env); 185 } 186 187 /** 188 * Return the compression method to use (STORED or DEFLATED). If the 189 * property {@code commpressionMethod} is set use its value to determine 190 * the compression method to use. If the property is not set, then the 191 * default compression is DEFLATED unless the property {@code noCompression} 192 * is set which is supported for backwards compatibility. 193 * @param env Zip FS map of properties 194 * @return The Compression method to use 195 */ 196 private int getDefaultCompressionMethod(Map<String, ?> env) { 197 int result = 198 isTrue(env, "noCompression") ? METHOD_STORED : METHOD_DEFLATED; 199 if (env.containsKey(PROPERTY_COMPRESSION_METHOD)) { 200 Object compressionMethod = env.get(PROPERTY_COMPRESSION_METHOD); 201 if (compressionMethod != null) { 202 if (compressionMethod instanceof String) { 203 switch (((String) compressionMethod).toUpperCase()) { 204 case COMPRESSION_METHOD_STORED: 205 result = METHOD_STORED; 206 break; 207 case COMPRESSION_METHOD_DEFLATED: 208 result = METHOD_DEFLATED; 209 break; 210 default: 211 throw new IllegalArgumentException(String.format( 212 "The value for the %s property must be %s or %s", 213 PROPERTY_COMPRESSION_METHOD, COMPRESSION_METHOD_STORED, 214 COMPRESSION_METHOD_DEFLATED)); 215 } 216 } else { 217 throw new IllegalArgumentException(String.format( 218 "The Object type for the %s property must be a String", 219 PROPERTY_COMPRESSION_METHOD)); 220 } 221 } else { 222 throw new IllegalArgumentException(String.format( 223 "The value for the %s property must be %s or %s", 224 PROPERTY_COMPRESSION_METHOD, COMPRESSION_METHOD_STORED, 225 COMPRESSION_METHOD_DEFLATED)); 226 } 227 } 228 return result; 229 } 230 231 // returns true if there is a name=true/"true" setting in env 232 private static boolean isTrue(Map<String, ?> env, String name) { 233 return "true".equals(env.get(name)) || TRUE.equals(env.get(name)); 234 } 235 236 // Initialize the default owner for files inside the zip archive. 237 // If not specified in env, it is the owner of the archive. If no owner can 238 // be determined, we try to go with system property "user.name". If that's not 239 // accessible, we return "<zipfs_default>". 240 private UserPrincipal initOwner(Path zfpath, Map<String, ?> env) throws IOException { 241 Object o = env.get(PROPERTY_DEFAULT_OWNER); 242 if (o == null) { 243 try { 244 PrivilegedExceptionAction<UserPrincipal> pa = ()->Files.getOwner(zfpath); 245 return AccessController.doPrivileged(pa); 246 } catch (UnsupportedOperationException | PrivilegedActionException e) { 247 if (e instanceof UnsupportedOperationException || 248 e.getCause() instanceof NoSuchFileException) 249 { 250 PrivilegedAction<String> pa = ()->System.getProperty("user.name"); 251 String userName = AccessController.doPrivileged(pa); 252 return ()->userName; 253 } else { 254 throw new IOException(e); 255 } 256 } 257 } 258 if (o instanceof String) { 259 if (((String)o).isEmpty()) { 260 throw new IllegalArgumentException("Value for property " + 261 PROPERTY_DEFAULT_OWNER + " must not be empty."); 262 } 263 return ()->(String)o; 264 } 265 if (o instanceof UserPrincipal) { 266 return (UserPrincipal)o; 267 } 268 throw new IllegalArgumentException("Value for property " + 269 PROPERTY_DEFAULT_OWNER + " must be of type " + String.class + 270 " or " + UserPrincipal.class); 271 } 272 273 // Initialize the default group for files inside the zip archive. 274 // If not specified in env, we try to determine the group of the zip archive itself. 275 // If this is not possible/unsupported, we will return a group principal going by 276 // the same name as the default owner. 277 private GroupPrincipal initGroup(Path zfpath, Map<String, ?> env) throws IOException { 278 Object o = env.get(PROPERTY_DEFAULT_GROUP); 279 if (o == null) { 280 try { 281 PosixFileAttributeView zfpv = Files.getFileAttributeView(zfpath, PosixFileAttributeView.class); 282 if (zfpv == null) { 283 return defaultOwner::getName; 284 } 285 PrivilegedExceptionAction<GroupPrincipal> pa = ()->zfpv.readAttributes().group(); 286 return AccessController.doPrivileged(pa); 287 } catch (UnsupportedOperationException | PrivilegedActionException e) { 288 if (e instanceof UnsupportedOperationException || 289 e.getCause() instanceof NoSuchFileException) 290 { 291 return defaultOwner::getName; 292 } else { 293 throw new IOException(e); 294 } 295 } 296 } 297 if (o instanceof String) { 298 if (((String)o).isEmpty()) { 299 throw new IllegalArgumentException("Value for property " + 300 PROPERTY_DEFAULT_GROUP + " must not be empty."); 301 } 302 return ()->(String)o; 303 } 304 if (o instanceof GroupPrincipal) { 305 return (GroupPrincipal)o; 306 } 307 throw new IllegalArgumentException("Value for property " + 308 PROPERTY_DEFAULT_GROUP + " must be of type " + String.class + 309 " or " + GroupPrincipal.class); 310 } 311 312 // Initialize the default permissions for files inside the zip archive. 313 // If not specified in env, it will return 777. 314 private Set<PosixFilePermission> initPermissions(Map<String, ?> env) { 315 Object o = env.get(PROPERTY_DEFAULT_PERMISSIONS); 316 if (o == null) { 317 return DEFAULT_PERMISSIONS; 318 } 319 if (o instanceof String) { 320 return PosixFilePermissions.fromString((String)o); 321 } 322 if (!(o instanceof Set)) { 323 throw new IllegalArgumentException("Value for property " + 324 PROPERTY_DEFAULT_PERMISSIONS + " must be of type " + String.class + 325 " or " + Set.class); 326 } 327 Set<PosixFilePermission> perms = new HashSet<>(); 328 for (Object o2 : (Set<?>)o) { 329 if (o2 instanceof PosixFilePermission) { 330 perms.add((PosixFilePermission)o2); 331 } else { 332 throw new IllegalArgumentException(PROPERTY_DEFAULT_PERMISSIONS + 333 " must only contain objects of type " + PosixFilePermission.class); 334 } 335 } 336 return perms; 337 } 338 339 @Override 340 public FileSystemProvider provider() { 341 return provider; 342 } 343 344 @Override 345 public String getSeparator() { 346 return "/"; 347 } 348 349 @Override 350 public boolean isOpen() { 351 return isOpen; 352 } 353 354 @Override 355 public boolean isReadOnly() { 356 return readOnly; 357 } 358 359 private void checkWritable() { 360 if (readOnly) { 361 throw new ReadOnlyFileSystemException(); 362 } 363 } 364 365 void setReadOnly() { 366 this.readOnly = true; 367 } 368 369 @Override 370 public Iterable<Path> getRootDirectories() { 371 return List.of(rootdir); 372 } 373 374 ZipPath getRootDir() { 375 return rootdir; 376 } 377 378 @Override 379 public ZipPath getPath(String first, String... more) { 380 if (more.length == 0) { 381 return new ZipPath(this, first); 382 } 383 StringBuilder sb = new StringBuilder(); 384 sb.append(first); 385 for (String path : more) { 386 if (path.length() > 0) { 387 if (sb.length() > 0) { 388 sb.append('/'); 389 } 390 sb.append(path); 391 } 392 } 393 return new ZipPath(this, sb.toString()); 394 } 395 396 @Override 397 public UserPrincipalLookupService getUserPrincipalLookupService() { 398 throw new UnsupportedOperationException(); 399 } 400 401 @Override 402 public WatchService newWatchService() { 403 throw new UnsupportedOperationException(); 404 } 405 406 FileStore getFileStore(ZipPath path) { 407 return new ZipFileStore(path); 408 } 409 410 @Override 411 public Iterable<FileStore> getFileStores() { 412 return List.of(new ZipFileStore(rootdir)); 413 } 414 415 @Override 416 public Set<String> supportedFileAttributeViews() { 417 return supportedFileAttributeViews; 418 } 419 420 @Override 421 public String toString() { 422 return zfpath.toString(); 423 } 424 425 Path getZipFile() { 426 return zfpath; 427 } 428 429 private static final String GLOB_SYNTAX = "glob"; 430 private static final String REGEX_SYNTAX = "regex"; 431 432 @Override 433 public PathMatcher getPathMatcher(String syntaxAndInput) { 434 int pos = syntaxAndInput.indexOf(':'); 435 if (pos <= 0 || pos == syntaxAndInput.length()) { 436 throw new IllegalArgumentException(); 437 } 438 String syntax = syntaxAndInput.substring(0, pos); 439 String input = syntaxAndInput.substring(pos + 1); 440 String expr; 441 if (syntax.equalsIgnoreCase(GLOB_SYNTAX)) { 442 expr = toRegexPattern(input); 443 } else { 444 if (syntax.equalsIgnoreCase(REGEX_SYNTAX)) { 445 expr = input; 446 } else { 447 throw new UnsupportedOperationException("Syntax '" + syntax + 448 "' not recognized"); 449 } 450 } 451 // return matcher 452 final Pattern pattern = Pattern.compile(expr); 453 return (path)->pattern.matcher(path.toString()).matches(); 454 } 455 456 @Override 457 public void close() throws IOException { 458 beginWrite(); 459 try { 460 if (!isOpen) 461 return; 462 isOpen = false; // set closed 463 } finally { 464 endWrite(); 465 } 466 if (!streams.isEmpty()) { // unlock and close all remaining streams 467 Set<InputStream> copy = new HashSet<>(streams); 468 for (InputStream is : copy) 469 is.close(); 470 } 471 beginWrite(); // lock and sync 472 try { 473 AccessController.doPrivileged((PrivilegedExceptionAction<Void>)() -> { 474 sync(); return null; 475 }); 476 ch.close(); // close the ch just in case no update 477 // and sync didn't close the ch 478 } catch (PrivilegedActionException e) { 479 throw (IOException)e.getException(); 480 } finally { 481 endWrite(); 482 } 483 484 synchronized (inflaters) { 485 for (Inflater inf : inflaters) 486 inf.end(); 487 } 488 synchronized (deflaters) { 489 for (Deflater def : deflaters) 490 def.end(); 491 } 492 493 beginWrite(); // lock and sync 494 try { 495 // Clear the map so that its keys & values can be garbage collected 496 inodes = null; 497 } finally { 498 endWrite(); 499 } 500 501 IOException ioe = null; 502 synchronized (tmppaths) { 503 for (Path p : tmppaths) { 504 try { 505 AccessController.doPrivileged( 506 (PrivilegedExceptionAction<Boolean>)() -> Files.deleteIfExists(p)); 507 } catch (PrivilegedActionException e) { 508 IOException x = (IOException)e.getException(); 509 if (ioe == null) 510 ioe = x; 511 else 512 ioe.addSuppressed(x); 513 } 514 } 515 } 516 provider.removeFileSystem(zfpath, this); 517 if (ioe != null) 518 throw ioe; 519 } 520 521 ZipFileAttributes getFileAttributes(byte[] path) 522 throws IOException 523 { 524 beginRead(); 525 try { 526 ensureOpen(); 527 IndexNode inode = getInode(path); 528 if (inode == null) { 529 return null; 530 } else if (inode instanceof Entry) { 531 return (Entry)inode; 532 } else if (inode.pos == -1) { 533 // pseudo directory, uses METHOD_STORED 534 Entry e = supportPosix ? 535 new PosixEntry(inode.name, inode.isdir, METHOD_STORED) : 536 new Entry(inode.name, inode.isdir, METHOD_STORED); 537 e.mtime = e.atime = e.ctime = zfsDefaultTimeStamp; 538 return e; 539 } else { 540 return supportPosix ? new PosixEntry(this, inode) : new Entry(this, inode); 541 } 542 } finally { 543 endRead(); 544 } 545 } 546 547 void checkAccess(byte[] path) throws IOException { 548 beginRead(); 549 try { 550 ensureOpen(); 551 // is it necessary to readCEN as a sanity check? 552 if (getInode(path) == null) { 553 throw new NoSuchFileException(toString()); 554 } 555 556 } finally { 557 endRead(); 558 } 559 } 560 561 void setTimes(byte[] path, FileTime mtime, FileTime atime, FileTime ctime) 562 throws IOException 563 { 564 checkWritable(); 565 beginWrite(); 566 try { 567 ensureOpen(); 568 Entry e = getEntry(path); // ensureOpen checked 569 if (e == null) 570 throw new NoSuchFileException(getString(path)); 571 if (e.type == Entry.CEN) 572 e.type = Entry.COPY; // copy e 573 if (mtime != null) 574 e.mtime = mtime.toMillis(); 575 if (atime != null) 576 e.atime = atime.toMillis(); 577 if (ctime != null) 578 e.ctime = ctime.toMillis(); 579 update(e); 580 } finally { 581 endWrite(); 582 } 583 } 584 585 void setOwner(byte[] path, UserPrincipal owner) throws IOException { 586 checkWritable(); 587 beginWrite(); 588 try { 589 ensureOpen(); 590 Entry e = getEntry(path); // ensureOpen checked 591 if (e == null) { 592 throw new NoSuchFileException(getString(path)); 593 } 594 // as the owner information is not persistent, we don't need to 595 // change e.type to Entry.COPY 596 if (e instanceof PosixEntry) { 597 ((PosixEntry)e).owner = owner; 598 update(e); 599 } 600 } finally { 601 endWrite(); 602 } 603 } 604 605 void setGroup(byte[] path, GroupPrincipal group) throws IOException { 606 checkWritable(); 607 beginWrite(); 608 try { 609 ensureOpen(); 610 Entry e = getEntry(path); // ensureOpen checked 611 if (e == null) { 612 throw new NoSuchFileException(getString(path)); 613 } 614 // as the group information is not persistent, we don't need to 615 // change e.type to Entry.COPY 616 if (e instanceof PosixEntry) { 617 ((PosixEntry)e).group = group; 618 update(e); 619 } 620 } finally { 621 endWrite(); 622 } 623 } 624 625 void setPermissions(byte[] path, Set<PosixFilePermission> perms) throws IOException { 626 checkWritable(); 627 beginWrite(); 628 try { 629 ensureOpen(); 630 Entry e = getEntry(path); // ensureOpen checked 631 if (e == null) { 632 throw new NoSuchFileException(getString(path)); 633 } 634 if (e.type == Entry.CEN) { 635 e.type = Entry.COPY; // copy e 636 } 637 e.posixPerms = perms == null ? -1 : ZipUtils.permsToFlags(perms); 638 update(e); 639 } finally { 640 endWrite(); 641 } 642 } 643 644 boolean exists(byte[] path) { 645 beginRead(); 646 try { 647 ensureOpen(); 648 return getInode(path) != null; 649 } finally { 650 endRead(); 651 } 652 } 653 654 boolean isDirectory(byte[] path) { 655 beginRead(); 656 try { 657 IndexNode n = getInode(path); 658 return n != null && n.isDir(); 659 } finally { 660 endRead(); 661 } 662 } 663 664 // returns the list of child paths of "path" 665 Iterator<Path> iteratorOf(ZipPath dir, 666 DirectoryStream.Filter<? super Path> filter) 667 throws IOException 668 { 669 beginWrite(); // iteration of inodes needs exclusive lock 670 try { 671 ensureOpen(); 672 byte[] path = dir.getResolvedPath(); 673 IndexNode inode = getInode(path); 674 if (inode == null) 675 throw new NotDirectoryException(getString(path)); 676 List<Path> list = new ArrayList<>(); 677 IndexNode child = inode.child; 678 while (child != null) { 679 // (1) Assume each path from the zip file itself is "normalized" 680 // (2) IndexNode.name is absolute. see IndexNode(byte[],int,int) 681 // (3) If parent "dir" is relative when ZipDirectoryStream 682 // is created, the returned child path needs to be relative 683 // as well. 684 ZipPath childPath = new ZipPath(this, child.name, true); 685 ZipPath childFileName = childPath.getFileName(); 686 ZipPath zpath = dir.resolve(childFileName); 687 if (filter == null || filter.accept(zpath)) 688 list.add(zpath); 689 child = child.sibling; 690 } 691 return list.iterator(); 692 } finally { 693 endWrite(); 694 } 695 } 696 697 void createDirectory(byte[] dir, FileAttribute<?>... attrs) throws IOException { 698 checkWritable(); 699 beginWrite(); 700 try { 701 ensureOpen(); 702 if (dir.length == 0 || exists(dir)) // root dir, or existing dir 703 throw new FileAlreadyExistsException(getString(dir)); 704 checkParents(dir); 705 Entry e = supportPosix ? 706 new PosixEntry(dir, Entry.NEW, true, METHOD_STORED, attrs) : 707 new Entry(dir, Entry.NEW, true, METHOD_STORED, attrs); 708 update(e); 709 } finally { 710 endWrite(); 711 } 712 } 713 714 void copyFile(boolean deletesrc, byte[]src, byte[] dst, CopyOption... options) 715 throws IOException 716 { 717 checkWritable(); 718 if (Arrays.equals(src, dst)) 719 return; // do nothing, src and dst are the same 720 721 beginWrite(); 722 try { 723 ensureOpen(); 724 Entry eSrc = getEntry(src); // ensureOpen checked 725 726 if (eSrc == null) 727 throw new NoSuchFileException(getString(src)); 728 if (eSrc.isDir()) { // spec says to create dst dir 729 createDirectory(dst); 730 return; 731 } 732 boolean hasReplace = false; 733 boolean hasCopyAttrs = false; 734 for (CopyOption opt : options) { 735 if (opt == REPLACE_EXISTING) 736 hasReplace = true; 737 else if (opt == COPY_ATTRIBUTES) 738 hasCopyAttrs = true; 739 } 740 Entry eDst = getEntry(dst); 741 if (eDst != null) { 742 if (!hasReplace) 743 throw new FileAlreadyExistsException(getString(dst)); 744 } else { 745 checkParents(dst); 746 } 747 // copy eSrc entry and change name 748 Entry u = supportPosix ? 749 new PosixEntry((PosixEntry)eSrc, Entry.COPY) : 750 new Entry(eSrc, Entry.COPY); 751 u.name(dst); 752 if (eSrc.type == Entry.NEW || eSrc.type == Entry.FILECH) { 753 u.type = eSrc.type; // make it the same type 754 if (deletesrc) { // if it's a "rename", take the data 755 u.bytes = eSrc.bytes; 756 u.file = eSrc.file; 757 } else { // if it's not "rename", copy the data 758 if (eSrc.bytes != null) 759 u.bytes = Arrays.copyOf(eSrc.bytes, eSrc.bytes.length); 760 else if (eSrc.file != null) { 761 u.file = getTempPathForEntry(null); 762 Files.copy(eSrc.file, u.file, REPLACE_EXISTING); 763 } 764 } 765 } else if (eSrc.type == Entry.CEN && eSrc.method != defaultCompressionMethod) { 766 767 /** 768 * We are copying a file within the same Zip file using a 769 * different compression method. 770 */ 771 try (InputStream in = newInputStream(src); 772 OutputStream out = newOutputStream(dst, 773 CREATE, TRUNCATE_EXISTING, WRITE)) { 774 in.transferTo(out); 775 } 776 u = getEntry(dst); 777 } 778 779 if (!hasCopyAttrs) 780 u.mtime = u.atime= u.ctime = System.currentTimeMillis(); 781 update(u); 782 if (deletesrc) 783 updateDelete(eSrc); 784 } finally { 785 endWrite(); 786 } 787 } 788 789 // Returns an output stream for writing the contents into the specified 790 // entry. 791 OutputStream newOutputStream(byte[] path, OpenOption... options) 792 throws IOException 793 { 794 checkWritable(); 795 boolean hasCreateNew = false; 796 boolean hasCreate = false; 797 boolean hasAppend = false; 798 boolean hasTruncate = false; 799 for (OpenOption opt : options) { 800 if (opt == READ) 801 throw new IllegalArgumentException("READ not allowed"); 802 if (opt == CREATE_NEW) 803 hasCreateNew = true; 804 if (opt == CREATE) 805 hasCreate = true; 806 if (opt == APPEND) 807 hasAppend = true; 808 if (opt == TRUNCATE_EXISTING) 809 hasTruncate = true; 810 } 811 if (hasAppend && hasTruncate) 812 throw new IllegalArgumentException("APPEND + TRUNCATE_EXISTING not allowed"); 813 beginRead(); // only need a readlock, the "update()" will 814 try { // try to obtain a writelock when the os is 815 ensureOpen(); // being closed. 816 Entry e = getEntry(path); 817 if (e != null) { 818 if (e.isDir() || hasCreateNew) 819 throw new FileAlreadyExistsException(getString(path)); 820 if (hasAppend) { 821 OutputStream os = getOutputStream(new Entry(e, Entry.NEW)); 822 try (InputStream is = getInputStream(e)) { 823 is.transferTo(os); 824 } 825 return os; 826 } 827 return getOutputStream(supportPosix ? 828 new PosixEntry((PosixEntry)e, Entry.NEW, defaultCompressionMethod) 829 : new Entry(e, Entry.NEW, defaultCompressionMethod)); 830 } else { 831 if (!hasCreate && !hasCreateNew) 832 throw new NoSuchFileException(getString(path)); 833 checkParents(path); 834 return getOutputStream(supportPosix ? 835 new PosixEntry(path, Entry.NEW, false, defaultCompressionMethod) : 836 new Entry(path, Entry.NEW, false, defaultCompressionMethod)); 837 } 838 } finally { 839 endRead(); 840 } 841 } 842 843 // Returns an input stream for reading the contents of the specified 844 // file entry. 845 InputStream newInputStream(byte[] path) throws IOException { 846 beginRead(); 847 try { 848 ensureOpen(); 849 Entry e = getEntry(path); 850 if (e == null) 851 throw new NoSuchFileException(getString(path)); 852 if (e.isDir()) 853 throw new FileSystemException(getString(path), "is a directory", null); 854 return getInputStream(e); 855 } finally { 856 endRead(); 857 } 858 } 859 860 private void checkOptions(Set<? extends OpenOption> options) { 861 // check for options of null type and option is an intance of StandardOpenOption 862 for (OpenOption option : options) { 863 if (option == null) 864 throw new NullPointerException(); 865 if (!(option instanceof StandardOpenOption)) 866 throw new IllegalArgumentException(); 867 } 868 if (options.contains(APPEND) && options.contains(TRUNCATE_EXISTING)) 869 throw new IllegalArgumentException("APPEND + TRUNCATE_EXISTING not allowed"); 870 } 871 872 // Returns an output SeekableByteChannel for either 873 // (1) writing the contents of a new entry, if the entry doesn't exist, or 874 // (2) updating/replacing the contents of an existing entry. 875 // Note: The content of the channel is not compressed until the 876 // channel is closed 877 private class EntryOutputChannel extends ByteArrayChannel { 878 final Entry e; 879 880 EntryOutputChannel(Entry e) { 881 super(e.size > 0? (int)e.size : 8192, false); 882 this.e = e; 883 if (e.mtime == -1) 884 e.mtime = System.currentTimeMillis(); 885 if (e.method == -1) 886 e.method = defaultCompressionMethod; 887 // store size, compressed size, and crc-32 in datadescriptor 888 e.flag = FLAG_DATADESCR; 889 if (zc.isUTF8()) 890 e.flag |= FLAG_USE_UTF8; 891 } 892 893 @Override 894 public void close() throws IOException { 895 // will update the entry 896 try (OutputStream os = getOutputStream(e)) { 897 os.write(toByteArray()); 898 } 899 super.close(); 900 } 901 } 902 903 // Returns a Writable/ReadByteChannel for now. Might consider to use 904 // newFileChannel() instead, which dump the entry data into a regular 905 // file on the default file system and create a FileChannel on top of it. 906 SeekableByteChannel newByteChannel(byte[] path, 907 Set<? extends OpenOption> options, 908 FileAttribute<?>... attrs) 909 throws IOException 910 { 911 checkOptions(options); 912 if (options.contains(StandardOpenOption.WRITE) || 913 options.contains(StandardOpenOption.APPEND)) { 914 checkWritable(); 915 beginRead(); // only need a read lock, the "update()" will obtain 916 // the write lock when the channel is closed 917 try { 918 Entry e = getEntry(path); 919 if (e != null) { 920 if (e.isDir() || options.contains(CREATE_NEW)) 921 throw new FileAlreadyExistsException(getString(path)); 922 SeekableByteChannel sbc = 923 new EntryOutputChannel(supportPosix ? 924 new PosixEntry((PosixEntry)e, Entry.NEW) : 925 new Entry(e, Entry.NEW)); 926 if (options.contains(APPEND)) { 927 try (InputStream is = getInputStream(e)) { // copyover 928 byte[] buf = new byte[8192]; 929 ByteBuffer bb = ByteBuffer.wrap(buf); 930 int n; 931 while ((n = is.read(buf)) != -1) { 932 bb.position(0); 933 bb.limit(n); 934 sbc.write(bb); 935 } 936 } 937 } 938 return sbc; 939 } 940 if (!options.contains(CREATE) && !options.contains(CREATE_NEW)) 941 throw new NoSuchFileException(getString(path)); 942 checkParents(path); 943 return new EntryOutputChannel( 944 supportPosix ? 945 new PosixEntry(path, Entry.NEW, false, defaultCompressionMethod, attrs) : 946 new Entry(path, Entry.NEW, false, defaultCompressionMethod, attrs)); 947 } finally { 948 endRead(); 949 } 950 } else { 951 beginRead(); 952 try { 953 ensureOpen(); 954 Entry e = getEntry(path); 955 if (e == null || e.isDir()) 956 throw new NoSuchFileException(getString(path)); 957 try (InputStream is = getInputStream(e)) { 958 // TBD: if (e.size < NNNNN); 959 return new ByteArrayChannel(is.readAllBytes(), true); 960 } 961 } finally { 962 endRead(); 963 } 964 } 965 } 966 967 // Returns a FileChannel of the specified entry. 968 // 969 // This implementation creates a temporary file on the default file system, 970 // copy the entry data into it if the entry exists, and then create a 971 // FileChannel on top of it. 972 FileChannel newFileChannel(byte[] path, 973 Set<? extends OpenOption> options, 974 FileAttribute<?>... attrs) 975 throws IOException 976 { 977 checkOptions(options); 978 final boolean forWrite = (options.contains(StandardOpenOption.WRITE) || 979 options.contains(StandardOpenOption.APPEND)); 980 beginRead(); 981 try { 982 ensureOpen(); 983 Entry e = getEntry(path); 984 if (forWrite) { 985 checkWritable(); 986 if (e == null) { 987 if (!options.contains(StandardOpenOption.CREATE) && 988 !options.contains(StandardOpenOption.CREATE_NEW)) { 989 throw new NoSuchFileException(getString(path)); 990 } 991 } else { 992 if (options.contains(StandardOpenOption.CREATE_NEW)) { 993 throw new FileAlreadyExistsException(getString(path)); 994 } 995 if (e.isDir()) 996 throw new FileAlreadyExistsException("directory <" 997 + getString(path) + "> exists"); 998 } 999 options = new HashSet<>(options); 1000 options.remove(StandardOpenOption.CREATE_NEW); // for tmpfile 1001 } else if (e == null || e.isDir()) { 1002 throw new NoSuchFileException(getString(path)); 1003 } 1004 1005 final boolean isFCH = (e != null && e.type == Entry.FILECH); 1006 final Path tmpfile = isFCH ? e.file : getTempPathForEntry(path); 1007 final FileChannel fch = tmpfile.getFileSystem() 1008 .provider() 1009 .newFileChannel(tmpfile, options, attrs); 1010 final Entry u = isFCH ? e : ( 1011 supportPosix ? 1012 new PosixEntry(path, tmpfile, Entry.FILECH, attrs) : 1013 new Entry(path, tmpfile, Entry.FILECH, attrs)); 1014 if (forWrite) { 1015 u.flag = FLAG_DATADESCR; 1016 u.method = defaultCompressionMethod; 1017 } 1018 // is there a better way to hook into the FileChannel's close method? 1019 return new FileChannel() { 1020 public int write(ByteBuffer src) throws IOException { 1021 return fch.write(src); 1022 } 1023 public long write(ByteBuffer[] srcs, int offset, int length) 1024 throws IOException 1025 { 1026 return fch.write(srcs, offset, length); 1027 } 1028 public long position() throws IOException { 1029 return fch.position(); 1030 } 1031 public FileChannel position(long newPosition) 1032 throws IOException 1033 { 1034 fch.position(newPosition); 1035 return this; 1036 } 1037 public long size() throws IOException { 1038 return fch.size(); 1039 } 1040 public FileChannel truncate(long size) 1041 throws IOException 1042 { 1043 fch.truncate(size); 1044 return this; 1045 } 1046 public void force(boolean metaData) 1047 throws IOException 1048 { 1049 fch.force(metaData); 1050 } 1051 public long transferTo(long position, long count, 1052 WritableByteChannel target) 1053 throws IOException 1054 { 1055 return fch.transferTo(position, count, target); 1056 } 1057 public long transferFrom(ReadableByteChannel src, 1058 long position, long count) 1059 throws IOException 1060 { 1061 return fch.transferFrom(src, position, count); 1062 } 1063 public int read(ByteBuffer dst) throws IOException { 1064 return fch.read(dst); 1065 } 1066 public int read(ByteBuffer dst, long position) 1067 throws IOException 1068 { 1069 return fch.read(dst, position); 1070 } 1071 public long read(ByteBuffer[] dsts, int offset, int length) 1072 throws IOException 1073 { 1074 return fch.read(dsts, offset, length); 1075 } 1076 public int write(ByteBuffer src, long position) 1077 throws IOException 1078 { 1079 return fch.write(src, position); 1080 } 1081 public MappedByteBuffer map(MapMode mode, 1082 long position, long size) 1083 { 1084 throw new UnsupportedOperationException(); 1085 } 1086 public FileLock lock(long position, long size, boolean shared) 1087 throws IOException 1088 { 1089 return fch.lock(position, size, shared); 1090 } 1091 public FileLock tryLock(long position, long size, boolean shared) 1092 throws IOException 1093 { 1094 return fch.tryLock(position, size, shared); 1095 } 1096 protected void implCloseChannel() throws IOException { 1097 fch.close(); 1098 if (forWrite) { 1099 u.mtime = System.currentTimeMillis(); 1100 u.size = Files.size(u.file); 1101 update(u); 1102 } else { 1103 if (!isFCH) // if this is a new fch for reading 1104 removeTempPathForEntry(tmpfile); 1105 } 1106 } 1107 }; 1108 } finally { 1109 endRead(); 1110 } 1111 } 1112 1113 // the outstanding input streams that need to be closed 1114 private Set<InputStream> streams = 1115 Collections.synchronizedSet(new HashSet<>()); 1116 1117 // the ex-channel and ex-path that need to close when their outstanding 1118 // input streams are all closed by the obtainers. 1119 private final Set<ExistingChannelCloser> exChClosers = new HashSet<>(); 1120 1121 private final Set<Path> tmppaths = Collections.synchronizedSet(new HashSet<>()); 1122 private Path getTempPathForEntry(byte[] path) throws IOException { 1123 Path tmpPath = createTempFileInSameDirectoryAs(zfpath); 1124 if (path != null) { 1125 Entry e = getEntry(path); 1126 if (e != null) { 1127 try (InputStream is = newInputStream(path)) { 1128 Files.copy(is, tmpPath, REPLACE_EXISTING); 1129 } 1130 } 1131 } 1132 return tmpPath; 1133 } 1134 1135 private void removeTempPathForEntry(Path path) throws IOException { 1136 Files.delete(path); 1137 tmppaths.remove(path); 1138 } 1139 1140 // check if all parents really exist. ZIP spec does not require 1141 // the existence of any "parent directory". 1142 private void checkParents(byte[] path) throws IOException { 1143 beginRead(); 1144 try { 1145 while ((path = getParent(path)) != null && 1146 path != ROOTPATH) { 1147 if (!inodes.containsKey(IndexNode.keyOf(path))) { 1148 throw new NoSuchFileException(getString(path)); 1149 } 1150 } 1151 } finally { 1152 endRead(); 1153 } 1154 } 1155 1156 private static byte[] getParent(byte[] path) { 1157 int off = getParentOff(path); 1158 if (off <= 1) 1159 return ROOTPATH; 1160 return Arrays.copyOf(path, off); 1161 } 1162 1163 private static int getParentOff(byte[] path) { 1164 int off = path.length - 1; 1165 if (off > 0 && path[off] == '/') // isDirectory 1166 off--; 1167 while (off > 0 && path[off] != '/') { off--; } 1168 return off; 1169 } 1170 1171 private void beginWrite() { 1172 rwlock.writeLock().lock(); 1173 } 1174 1175 private void endWrite() { 1176 rwlock.writeLock().unlock(); 1177 } 1178 1179 private void beginRead() { 1180 rwlock.readLock().lock(); 1181 } 1182 1183 private void endRead() { 1184 rwlock.readLock().unlock(); 1185 } 1186 1187 /////////////////////////////////////////////////////////////////// 1188 1189 private volatile boolean isOpen = true; 1190 private final SeekableByteChannel ch; // channel to the zipfile 1191 final byte[] cen; // CEN & ENDHDR 1192 private END end; 1193 private long locpos; // position of first LOC header (usually 0) 1194 1195 private final ReadWriteLock rwlock = new ReentrantReadWriteLock(); 1196 1197 // name -> pos (in cen), IndexNode itself can be used as a "key" 1198 private LinkedHashMap<IndexNode, IndexNode> inodes; 1199 1200 final byte[] getBytes(String name) { 1201 return zc.getBytes(name); 1202 } 1203 1204 final String getString(byte[] name) { 1205 return zc.toString(name); 1206 } 1207 1208 @SuppressWarnings("deprecation") 1209 protected void finalize() throws IOException { 1210 close(); 1211 } 1212 1213 // Reads len bytes of data from the specified offset into buf. 1214 // Returns the total number of bytes read. 1215 // Each/every byte read from here (except the cen, which is mapped). 1216 final long readFullyAt(byte[] buf, int off, long len, long pos) 1217 throws IOException 1218 { 1219 ByteBuffer bb = ByteBuffer.wrap(buf); 1220 bb.position(off); 1221 bb.limit((int)(off + len)); 1222 return readFullyAt(bb, pos); 1223 } 1224 1225 private long readFullyAt(ByteBuffer bb, long pos) throws IOException { 1226 synchronized(ch) { 1227 return ch.position(pos).read(bb); 1228 } 1229 } 1230 1231 // Searches for end of central directory (END) header. The contents of 1232 // the END header will be read and placed in endbuf. Returns the file 1233 // position of the END header, otherwise returns -1 if the END header 1234 // was not found or an error occurred. 1235 private END findEND() throws IOException { 1236 byte[] buf = new byte[READBLOCKSZ]; 1237 long ziplen = ch.size(); 1238 long minHDR = (ziplen - END_MAXLEN) > 0 ? ziplen - END_MAXLEN : 0; 1239 long minPos = minHDR - (buf.length - ENDHDR); 1240 1241 for (long pos = ziplen - buf.length; pos >= minPos; pos -= (buf.length - ENDHDR)) { 1242 int off = 0; 1243 if (pos < 0) { 1244 // Pretend there are some NUL bytes before start of file 1245 off = (int)-pos; 1246 Arrays.fill(buf, 0, off, (byte)0); 1247 } 1248 int len = buf.length - off; 1249 if (readFullyAt(buf, off, len, pos + off) != len) 1250 throw new ZipException("zip END header not found"); 1251 1252 // Now scan the block backwards for END header signature 1253 for (int i = buf.length - ENDHDR; i >= 0; i--) { 1254 if (buf[i] == (byte)'P' && 1255 buf[i+1] == (byte)'K' && 1256 buf[i+2] == (byte)'\005' && 1257 buf[i+3] == (byte)'\006' && 1258 (pos + i + ENDHDR + ENDCOM(buf, i) == ziplen)) { 1259 // Found END header 1260 buf = Arrays.copyOfRange(buf, i, i + ENDHDR); 1261 END end = new END(); 1262 // end.endsub = ENDSUB(buf); // not used 1263 end.centot = ENDTOT(buf); 1264 end.cenlen = ENDSIZ(buf); 1265 end.cenoff = ENDOFF(buf); 1266 // end.comlen = ENDCOM(buf); // not used 1267 end.endpos = pos + i; 1268 // try if there is zip64 end; 1269 byte[] loc64 = new byte[ZIP64_LOCHDR]; 1270 if (end.endpos < ZIP64_LOCHDR || 1271 readFullyAt(loc64, 0, loc64.length, end.endpos - ZIP64_LOCHDR) 1272 != loc64.length || 1273 !locator64SigAt(loc64, 0)) { 1274 return end; 1275 } 1276 long end64pos = ZIP64_LOCOFF(loc64); 1277 byte[] end64buf = new byte[ZIP64_ENDHDR]; 1278 if (readFullyAt(end64buf, 0, end64buf.length, end64pos) 1279 != end64buf.length || 1280 !end64SigAt(end64buf, 0)) { 1281 return end; 1282 } 1283 // end64 found, 1284 long cenlen64 = ZIP64_ENDSIZ(end64buf); 1285 long cenoff64 = ZIP64_ENDOFF(end64buf); 1286 long centot64 = ZIP64_ENDTOT(end64buf); 1287 // double-check 1288 if (cenlen64 != end.cenlen && end.cenlen != ZIP64_MINVAL || 1289 cenoff64 != end.cenoff && end.cenoff != ZIP64_MINVAL || 1290 centot64 != end.centot && end.centot != ZIP64_MINVAL32) { 1291 return end; 1292 } 1293 // to use the end64 values 1294 end.cenlen = cenlen64; 1295 end.cenoff = cenoff64; 1296 end.centot = (int)centot64; // assume total < 2g 1297 end.endpos = end64pos; 1298 return end; 1299 } 1300 } 1301 } 1302 throw new ZipException("zip END header not found"); 1303 } 1304 1305 private void makeParentDirs(IndexNode node, IndexNode root) { 1306 IndexNode parent; 1307 ParentLookup lookup = new ParentLookup(); 1308 while (true) { 1309 int off = getParentOff(node.name); 1310 // parent is root 1311 if (off <= 1) { 1312 node.sibling = root.child; 1313 root.child = node; 1314 break; 1315 } 1316 // parent exists 1317 lookup = lookup.as(node.name, off); 1318 if (inodes.containsKey(lookup)) { 1319 parent = inodes.get(lookup); 1320 node.sibling = parent.child; 1321 parent.child = node; 1322 break; 1323 } 1324 // parent does not exist, add new pseudo directory entry 1325 parent = new IndexNode(Arrays.copyOf(node.name, off), true); 1326 inodes.put(parent, parent); 1327 node.sibling = parent.child; 1328 parent.child = node; 1329 node = parent; 1330 } 1331 } 1332 1333 // ZIP directory has two issues: 1334 // (1) ZIP spec does not require the ZIP file to include 1335 // directory entry 1336 // (2) all entries are not stored/organized in a "tree" 1337 // structure. 1338 // A possible solution is to build the node tree ourself as 1339 // implemented below. 1340 private void buildNodeTree() { 1341 beginWrite(); 1342 try { 1343 IndexNode root = inodes.remove(LOOKUPKEY.as(ROOTPATH)); 1344 if (root == null) { 1345 root = new IndexNode(ROOTPATH, true); 1346 } 1347 IndexNode[] nodes = inodes.values().toArray(new IndexNode[0]); 1348 inodes.put(root, root); 1349 for (IndexNode node : nodes) { 1350 makeParentDirs(node, root); 1351 } 1352 } finally { 1353 endWrite(); 1354 } 1355 } 1356 1357 private void removeFromTree(IndexNode inode) { 1358 IndexNode parent = inodes.get(LOOKUPKEY.as(getParent(inode.name))); 1359 IndexNode child = parent.child; 1360 if (child.equals(inode)) { 1361 parent.child = child.sibling; 1362 } else { 1363 IndexNode last = child; 1364 while ((child = child.sibling) != null) { 1365 if (child.equals(inode)) { 1366 last.sibling = child.sibling; 1367 break; 1368 } else { 1369 last = child; 1370 } 1371 } 1372 } 1373 } 1374 1375 /** 1376 * If a version property has been specified and the file represents a multi-release JAR, 1377 * determine the requested runtime version and initialize the ZipFileSystem instance accordingly. 1378 * 1379 * Checks if the Zip File System property "releaseVersion" has been specified. If it has, 1380 * use its value to determine the requested version. If not use the value of the "multi-release" property. 1381 */ 1382 private void initializeReleaseVersion(Map<String, ?> env) throws IOException { 1383 Object o = env.containsKey(PROPERTY_RELEASE_VERSION) ? 1384 env.get(PROPERTY_RELEASE_VERSION) : 1385 env.get(PROPERTY_MULTI_RELEASE); 1386 1387 if (o != null && isMultiReleaseJar()) { 1388 int version; 1389 if (o instanceof String) { 1390 String s = (String)o; 1391 if (s.equals("runtime")) { 1392 version = Runtime.version().feature(); 1393 } else if (s.matches("^[1-9][0-9]*$")) { 1394 version = Version.parse(s).feature(); 1395 } else { 1396 throw new IllegalArgumentException("Invalid runtime version"); 1397 } 1398 } else if (o instanceof Integer) { 1399 version = Version.parse(((Integer)o).toString()).feature(); 1400 } else if (o instanceof Version) { 1401 version = ((Version)o).feature(); 1402 } else { 1403 throw new IllegalArgumentException("env parameter must be String, " + 1404 "Integer, or Version"); 1405 } 1406 createVersionedLinks(version < 0 ? 0 : version); 1407 setReadOnly(); 1408 } 1409 } 1410 1411 /** 1412 * Returns true if the Manifest main attribute "Multi-Release" is set to true; false otherwise. 1413 */ 1414 private boolean isMultiReleaseJar() throws IOException { 1415 try (InputStream is = newInputStream(getBytes("/META-INF/MANIFEST.MF"))) { 1416 String multiRelease = new Manifest(is).getMainAttributes() 1417 .getValue(Attributes.Name.MULTI_RELEASE); 1418 return "true".equalsIgnoreCase(multiRelease); 1419 } catch (NoSuchFileException x) { 1420 return false; 1421 } 1422 } 1423 1424 /** 1425 * Create a map of aliases for versioned entries, for example: 1426 * version/PackagePrivate.class -> META-INF/versions/9/version/PackagePrivate.class 1427 * version/PackagePrivate.java -> META-INF/versions/9/version/PackagePrivate.java 1428 * version/Version.class -> META-INF/versions/10/version/Version.class 1429 * version/Version.java -> META-INF/versions/10/version/Version.java 1430 * 1431 * Then wrap the map in a function that getEntry can use to override root 1432 * entry lookup for entries that have corresponding versioned entries. 1433 */ 1434 private void createVersionedLinks(int version) { 1435 IndexNode verdir = getInode(getBytes("/META-INF/versions")); 1436 // nothing to do, if no /META-INF/versions 1437 if (verdir == null) { 1438 return; 1439 } 1440 // otherwise, create a map and for each META-INF/versions/{n} directory 1441 // put all the leaf inodes, i.e. entries, into the alias map 1442 // possibly shadowing lower versioned entries 1443 HashMap<IndexNode, byte[]> aliasMap = new HashMap<>(); 1444 getVersionMap(version, verdir).values().forEach(versionNode -> 1445 walk(versionNode.child, entryNode -> 1446 aliasMap.put( 1447 getOrCreateInode(getRootName(entryNode, versionNode), entryNode.isdir), 1448 entryNode.name)) 1449 ); 1450 entryLookup = path -> { 1451 byte[] entry = aliasMap.get(IndexNode.keyOf(path)); 1452 return entry == null ? path : entry; 1453 }; 1454 } 1455 1456 /** 1457 * Create a sorted version map of version -> inode, for inodes <= max version. 1458 * 9 -> META-INF/versions/9 1459 * 10 -> META-INF/versions/10 1460 */ 1461 private TreeMap<Integer, IndexNode> getVersionMap(int version, IndexNode metaInfVersions) { 1462 TreeMap<Integer,IndexNode> map = new TreeMap<>(); 1463 IndexNode child = metaInfVersions.child; 1464 while (child != null) { 1465 Integer key = getVersion(child, metaInfVersions); 1466 if (key != null && key <= version) { 1467 map.put(key, child); 1468 } 1469 child = child.sibling; 1470 } 1471 return map; 1472 } 1473 1474 /** 1475 * Extract the integer version number -- META-INF/versions/9 returns 9. 1476 */ 1477 private Integer getVersion(IndexNode inode, IndexNode metaInfVersions) { 1478 try { 1479 byte[] fullName = inode.name; 1480 return Integer.parseInt(getString(Arrays 1481 .copyOfRange(fullName, metaInfVersions.name.length + 1, fullName.length))); 1482 } catch (NumberFormatException x) { 1483 // ignore this even though it might indicate issues with the JAR structure 1484 return null; 1485 } 1486 } 1487 1488 /** 1489 * Walk the IndexNode tree processing all leaf nodes. 1490 */ 1491 private void walk(IndexNode inode, Consumer<IndexNode> consumer) { 1492 if (inode == null) return; 1493 if (inode.isDir()) { 1494 walk(inode.child, consumer); 1495 } else { 1496 consumer.accept(inode); 1497 } 1498 walk(inode.sibling, consumer); 1499 } 1500 1501 /** 1502 * Extract the root name from a versioned entry name. 1503 * E.g. given inode 'META-INF/versions/9/foo/bar.class' 1504 * and prefix 'META-INF/versions/9/' returns 'foo/bar.class'. 1505 */ 1506 private byte[] getRootName(IndexNode inode, IndexNode prefix) { 1507 byte[] fullName = inode.name; 1508 return Arrays.copyOfRange(fullName, prefix.name.length, fullName.length); 1509 } 1510 1511 // Reads zip file central directory. Returns the file position of first 1512 // CEN header, otherwise returns -1 if an error occurred. If zip->msg != NULL 1513 // then the error was a zip format error and zip->msg has the error text. 1514 // Always pass in -1 for knownTotal; it's used for a recursive call. 1515 private byte[] initCEN() throws IOException { 1516 end = findEND(); 1517 if (end.endpos == 0) { 1518 inodes = new LinkedHashMap<>(10); 1519 locpos = 0; 1520 buildNodeTree(); 1521 return null; // only END header present 1522 } 1523 if (end.cenlen > end.endpos) 1524 throw new ZipException("invalid END header (bad central directory size)"); 1525 long cenpos = end.endpos - end.cenlen; // position of CEN table 1526 1527 // Get position of first local file (LOC) header, taking into 1528 // account that there may be a stub prefixed to the zip file. 1529 locpos = cenpos - end.cenoff; 1530 if (locpos < 0) 1531 throw new ZipException("invalid END header (bad central directory offset)"); 1532 1533 // read in the CEN and END 1534 byte[] cen = new byte[(int)(end.cenlen + ENDHDR)]; 1535 if (readFullyAt(cen, 0, cen.length, cenpos) != end.cenlen + ENDHDR) { 1536 throw new ZipException("read CEN tables failed"); 1537 } 1538 // Iterate through the entries in the central directory 1539 inodes = new LinkedHashMap<>(end.centot + 1); 1540 int pos = 0; 1541 int limit = cen.length - ENDHDR; 1542 while (pos < limit) { 1543 if (!cenSigAt(cen, pos)) 1544 throw new ZipException("invalid CEN header (bad signature)"); 1545 int method = CENHOW(cen, pos); 1546 int nlen = CENNAM(cen, pos); 1547 int elen = CENEXT(cen, pos); 1548 int clen = CENCOM(cen, pos); 1549 if ((CENFLG(cen, pos) & 1) != 0) { 1550 throw new ZipException("invalid CEN header (encrypted entry)"); 1551 } 1552 if (method != METHOD_STORED && method != METHOD_DEFLATED) { 1553 throw new ZipException("invalid CEN header (unsupported compression method: " + method + ")"); 1554 } 1555 if (pos + CENHDR + nlen > limit) { 1556 throw new ZipException("invalid CEN header (bad header size)"); 1557 } 1558 IndexNode inode = new IndexNode(cen, pos, nlen); 1559 inodes.put(inode, inode); 1560 1561 // skip ext and comment 1562 pos += (CENHDR + nlen + elen + clen); 1563 } 1564 if (pos + ENDHDR != cen.length) { 1565 throw new ZipException("invalid CEN header (bad header size)"); 1566 } 1567 buildNodeTree(); 1568 return cen; 1569 } 1570 1571 private void ensureOpen() { 1572 if (!isOpen) 1573 throw new ClosedFileSystemException(); 1574 } 1575 1576 // Creates a new empty temporary file in the same directory as the 1577 // specified file. A variant of Files.createTempFile. 1578 private Path createTempFileInSameDirectoryAs(Path path) throws IOException { 1579 Path parent = path.toAbsolutePath().getParent(); 1580 Path dir = (parent == null) ? path.getFileSystem().getPath(".") : parent; 1581 Path tmpPath = Files.createTempFile(dir, "zipfstmp", null); 1582 tmppaths.add(tmpPath); 1583 return tmpPath; 1584 } 1585 1586 ////////////////////update & sync ////////////////////////////////////// 1587 1588 private boolean hasUpdate = false; 1589 1590 // shared key. consumer guarantees the "writeLock" before use it. 1591 private final IndexNode LOOKUPKEY = new IndexNode(null, -1); 1592 1593 private void updateDelete(IndexNode inode) { 1594 beginWrite(); 1595 try { 1596 removeFromTree(inode); 1597 inodes.remove(inode); 1598 hasUpdate = true; 1599 } finally { 1600 endWrite(); 1601 } 1602 } 1603 1604 private void update(Entry e) { 1605 beginWrite(); 1606 try { 1607 IndexNode old = inodes.put(e, e); 1608 if (old != null) { 1609 removeFromTree(old); 1610 } 1611 if (e.type == Entry.NEW || e.type == Entry.FILECH || e.type == Entry.COPY) { 1612 IndexNode parent = inodes.get(LOOKUPKEY.as(getParent(e.name))); 1613 e.sibling = parent.child; 1614 parent.child = e; 1615 } 1616 hasUpdate = true; 1617 } finally { 1618 endWrite(); 1619 } 1620 } 1621 1622 // copy over the whole LOC entry (header if necessary, data and ext) from 1623 // old zip to the new one. 1624 private long copyLOCEntry(Entry e, boolean updateHeader, 1625 OutputStream os, 1626 long written, byte[] buf) 1627 throws IOException 1628 { 1629 long locoff = e.locoff; // where to read 1630 e.locoff = written; // update the e.locoff with new value 1631 1632 // calculate the size need to write out 1633 long size = 0; 1634 // if there is A ext 1635 if ((e.flag & FLAG_DATADESCR) != 0) { 1636 if (e.size >= ZIP64_MINVAL || e.csize >= ZIP64_MINVAL) 1637 size = 24; 1638 else 1639 size = 16; 1640 } 1641 // read loc, use the original loc.elen/nlen 1642 // 1643 // an extra byte after loc is read, which should be the first byte of the 1644 // 'name' field of the loc. if this byte is '/', which means the original 1645 // entry has an absolute path in original zip/jar file, the e.writeLOC() 1646 // is used to output the loc, in which the leading "/" will be removed 1647 if (readFullyAt(buf, 0, LOCHDR + 1 , locoff) != LOCHDR + 1) 1648 throw new ZipException("loc: reading failed"); 1649 1650 if (updateHeader || LOCNAM(buf) > 0 && buf[LOCHDR] == '/') { 1651 locoff += LOCHDR + LOCNAM(buf) + LOCEXT(buf); // skip header 1652 size += e.csize; 1653 written = e.writeLOC(os) + size; 1654 } else { 1655 os.write(buf, 0, LOCHDR); // write out the loc header 1656 locoff += LOCHDR; 1657 // use e.csize, LOCSIZ(buf) is zero if FLAG_DATADESCR is on 1658 // size += LOCNAM(buf) + LOCEXT(buf) + LOCSIZ(buf); 1659 size += LOCNAM(buf) + LOCEXT(buf) + e.csize; 1660 written = LOCHDR + size; 1661 } 1662 int n; 1663 while (size > 0 && 1664 (n = (int)readFullyAt(buf, 0, buf.length, locoff)) != -1) 1665 { 1666 if (size < n) 1667 n = (int)size; 1668 os.write(buf, 0, n); 1669 size -= n; 1670 locoff += n; 1671 } 1672 return written; 1673 } 1674 1675 private long writeEntry(Entry e, OutputStream os) 1676 throws IOException { 1677 1678 if (e.bytes == null && e.file == null) // dir, 0-length data 1679 return 0; 1680 1681 long written = 0; 1682 if (e.method != METHOD_STORED && e.csize > 0 && (e.crc != 0 || e.size == 0)) { 1683 // pre-compressed entry, write directly to output stream 1684 writeTo(e, os); 1685 } else { 1686 try (OutputStream os2 = (e.method == METHOD_STORED) ? 1687 new EntryOutputStreamCRC32(e, os) : new EntryOutputStreamDef(e, os)) { 1688 writeTo(e, os2); 1689 } 1690 } 1691 written += e.csize; 1692 if ((e.flag & FLAG_DATADESCR) != 0) { 1693 written += e.writeEXT(os); 1694 } 1695 return written; 1696 } 1697 1698 private void writeTo(Entry e, OutputStream os) throws IOException { 1699 if (e.bytes != null) { 1700 os.write(e.bytes, 0, e.bytes.length); 1701 } else if (e.file != null) { 1702 if (e.type == Entry.NEW || e.type == Entry.FILECH) { 1703 try (InputStream is = Files.newInputStream(e.file)) { 1704 is.transferTo(os); 1705 } 1706 } 1707 Files.delete(e.file); 1708 tmppaths.remove(e.file); 1709 } 1710 } 1711 1712 // sync the zip file system, if there is any update 1713 private void sync() throws IOException { 1714 // check ex-closer 1715 if (!exChClosers.isEmpty()) { 1716 for (ExistingChannelCloser ecc : exChClosers) { 1717 if (ecc.closeAndDeleteIfDone()) { 1718 exChClosers.remove(ecc); 1719 } 1720 } 1721 } 1722 if (!hasUpdate) 1723 return; 1724 PosixFileAttributes attrs = getPosixAttributes(zfpath); 1725 Path tmpFile = createTempFileInSameDirectoryAs(zfpath); 1726 try (OutputStream os = new BufferedOutputStream(Files.newOutputStream(tmpFile, WRITE))) { 1727 ArrayList<Entry> elist = new ArrayList<>(inodes.size()); 1728 long written = 0; 1729 byte[] buf = null; 1730 Entry e; 1731 1732 // write loc 1733 for (IndexNode inode : inodes.values()) { 1734 if (inode instanceof Entry) { // an updated inode 1735 e = (Entry)inode; 1736 try { 1737 if (e.type == Entry.COPY) { 1738 // entry copy: the only thing changed is the "name" 1739 // and "nlen" in LOC header, so we update/rewrite the 1740 // LOC in new file and simply copy the rest (data and 1741 // ext) without enflating/deflating from the old zip 1742 // file LOC entry. 1743 if (buf == null) 1744 buf = new byte[8192]; 1745 written += copyLOCEntry(e, true, os, written, buf); 1746 } else { // NEW, FILECH or CEN 1747 e.locoff = written; 1748 written += e.writeLOC(os); // write loc header 1749 written += writeEntry(e, os); 1750 } 1751 elist.add(e); 1752 } catch (IOException x) { 1753 x.printStackTrace(); // skip any in-accurate entry 1754 } 1755 } else { // unchanged inode 1756 if (inode.pos == -1) { 1757 continue; // pseudo directory node 1758 } 1759 if (inode.name.length == 1 && inode.name[0] == '/') { 1760 continue; // no root '/' directory even if it 1761 // exists in original zip/jar file. 1762 } 1763 e = supportPosix ? new PosixEntry(this, inode) : new Entry(this, inode); 1764 try { 1765 if (buf == null) 1766 buf = new byte[8192]; 1767 written += copyLOCEntry(e, false, os, written, buf); 1768 elist.add(e); 1769 } catch (IOException x) { 1770 x.printStackTrace(); // skip any wrong entry 1771 } 1772 } 1773 } 1774 1775 // now write back the cen and end table 1776 end.cenoff = written; 1777 for (Entry entry : elist) { 1778 written += entry.writeCEN(os); 1779 } 1780 end.centot = elist.size(); 1781 end.cenlen = written - end.cenoff; 1782 end.write(os, written, forceEnd64); 1783 } 1784 if (!streams.isEmpty()) { 1785 // 1786 // There are outstanding input streams open on existing "ch", 1787 // so, don't close the "cha" and delete the "file for now, let 1788 // the "ex-channel-closer" to handle them 1789 Path path = createTempFileInSameDirectoryAs(zfpath); 1790 ExistingChannelCloser ecc = new ExistingChannelCloser(path, 1791 ch, 1792 streams); 1793 Files.move(zfpath, path, REPLACE_EXISTING); 1794 exChClosers.add(ecc); 1795 streams = Collections.synchronizedSet(new HashSet<>()); 1796 } else { 1797 ch.close(); 1798 Files.delete(zfpath); 1799 } 1800 1801 // Set the POSIX permissions of the original Zip File if available 1802 // before moving the temp file 1803 if (attrs != null) { 1804 Files.setPosixFilePermissions(tmpFile, attrs.permissions()); 1805 } 1806 Files.move(tmpFile, zfpath, REPLACE_EXISTING); 1807 hasUpdate = false; // clear 1808 } 1809 1810 /** 1811 * Returns a file's POSIX file attributes. 1812 * @param path The path to the file 1813 * @return The POSIX file attributes for the specified file or 1814 * null if the POSIX attribute view is not available 1815 * @throws IOException If an error occurs obtaining the POSIX attributes for 1816 * the specified file 1817 */ 1818 private PosixFileAttributes getPosixAttributes(Path path) throws IOException { 1819 try { 1820 PosixFileAttributeView view = 1821 Files.getFileAttributeView(path, PosixFileAttributeView.class); 1822 // Return if the attribute view is not supported 1823 if (view == null) { 1824 return null; 1825 } 1826 return view.readAttributes(); 1827 } catch (UnsupportedOperationException e) { 1828 // PosixFileAttributes not available 1829 return null; 1830 } 1831 } 1832 1833 private IndexNode getInode(byte[] path) { 1834 return inodes.get(IndexNode.keyOf(Objects.requireNonNull(entryLookup.apply(path), "path"))); 1835 } 1836 1837 /** 1838 * Return the IndexNode from the root tree. If it doesn't exist, 1839 * it gets created along with all parent directory IndexNodes. 1840 */ 1841 private IndexNode getOrCreateInode(byte[] path, boolean isdir) { 1842 IndexNode node = getInode(path); 1843 // if node exists, return it 1844 if (node != null) { 1845 return node; 1846 } 1847 1848 // otherwise create new pseudo node and parent directory hierarchy 1849 node = new IndexNode(path, isdir); 1850 beginWrite(); 1851 try { 1852 makeParentDirs(node, Objects.requireNonNull(inodes.get(IndexNode.keyOf(ROOTPATH)), "no root node found")); 1853 return node; 1854 } finally { 1855 endWrite(); 1856 } 1857 } 1858 1859 private Entry getEntry(byte[] path) throws IOException { 1860 IndexNode inode = getInode(path); 1861 if (inode instanceof Entry) 1862 return (Entry)inode; 1863 if (inode == null || inode.pos == -1) 1864 return null; 1865 return supportPosix ? new PosixEntry(this, inode): new Entry(this, inode); 1866 } 1867 1868 public void deleteFile(byte[] path, boolean failIfNotExists) 1869 throws IOException 1870 { 1871 checkWritable(); 1872 IndexNode inode = getInode(path); 1873 if (inode == null) { 1874 if (path != null && path.length == 0) 1875 throw new ZipException("root directory </> can't not be delete"); 1876 if (failIfNotExists) 1877 throw new NoSuchFileException(getString(path)); 1878 } else { 1879 if (inode.isDir() && inode.child != null) 1880 throw new DirectoryNotEmptyException(getString(path)); 1881 updateDelete(inode); 1882 } 1883 } 1884 1885 // Returns an out stream for either 1886 // (1) writing the contents of a new entry, if the entry exists, or 1887 // (2) updating/replacing the contents of the specified existing entry. 1888 private OutputStream getOutputStream(Entry e) throws IOException { 1889 if (e.mtime == -1) 1890 e.mtime = System.currentTimeMillis(); 1891 if (e.method == -1) 1892 e.method = defaultCompressionMethod; 1893 // store size, compressed size, and crc-32 in datadescr 1894 e.flag = FLAG_DATADESCR; 1895 if (zc.isUTF8()) 1896 e.flag |= FLAG_USE_UTF8; 1897 OutputStream os; 1898 if (useTempFile) { 1899 e.file = getTempPathForEntry(null); 1900 os = Files.newOutputStream(e.file, WRITE); 1901 } else { 1902 os = new ByteArrayOutputStream((e.size > 0)? (int)e.size : 8192); 1903 } 1904 if (e.method == METHOD_DEFLATED) { 1905 return new DeflatingEntryOutputStream(e, os); 1906 } else { 1907 return new EntryOutputStream(e, os); 1908 } 1909 } 1910 1911 private class EntryOutputStream extends FilterOutputStream { 1912 private final Entry e; 1913 private long written; 1914 private boolean isClosed; 1915 1916 EntryOutputStream(Entry e, OutputStream os) { 1917 super(os); 1918 this.e = Objects.requireNonNull(e, "Zip entry is null"); 1919 // this.written = 0; 1920 } 1921 1922 @Override 1923 public synchronized void write(int b) throws IOException { 1924 out.write(b); 1925 written += 1; 1926 } 1927 1928 @Override 1929 public synchronized void write(byte[] b, int off, int len) 1930 throws IOException { 1931 out.write(b, off, len); 1932 written += len; 1933 } 1934 1935 @Override 1936 public synchronized void close() throws IOException { 1937 if (isClosed) { 1938 return; 1939 } 1940 isClosed = true; 1941 e.size = written; 1942 if (out instanceof ByteArrayOutputStream) 1943 e.bytes = ((ByteArrayOutputStream)out).toByteArray(); 1944 super.close(); 1945 update(e); 1946 } 1947 } 1948 1949 // Output stream returned when writing "deflated" entries into memory, 1950 // to enable eager (possibly parallel) deflation and reduce memory required. 1951 private class DeflatingEntryOutputStream extends DeflaterOutputStream { 1952 private final CRC32 crc; 1953 private final Entry e; 1954 private boolean isClosed; 1955 1956 DeflatingEntryOutputStream(Entry e, OutputStream os) { 1957 super(os, getDeflater()); 1958 this.e = Objects.requireNonNull(e, "Zip entry is null"); 1959 this.crc = new CRC32(); 1960 } 1961 1962 @Override 1963 public synchronized void write(byte[] b, int off, int len) 1964 throws IOException { 1965 super.write(b, off, len); 1966 crc.update(b, off, len); 1967 } 1968 1969 @Override 1970 public synchronized void close() throws IOException { 1971 if (isClosed) 1972 return; 1973 isClosed = true; 1974 finish(); 1975 e.size = def.getBytesRead(); 1976 e.csize = def.getBytesWritten(); 1977 e.crc = crc.getValue(); 1978 if (out instanceof ByteArrayOutputStream) 1979 e.bytes = ((ByteArrayOutputStream)out).toByteArray(); 1980 super.close(); 1981 update(e); 1982 releaseDeflater(def); 1983 } 1984 } 1985 1986 // Wrapper output stream class to write out a "stored" entry. 1987 // (1) this class does not close the underlying out stream when 1988 // being closed. 1989 // (2) no need to be "synchronized", only used by sync() 1990 private class EntryOutputStreamCRC32 extends FilterOutputStream { 1991 private final CRC32 crc; 1992 private final Entry e; 1993 private long written; 1994 private boolean isClosed; 1995 1996 EntryOutputStreamCRC32(Entry e, OutputStream os) { 1997 super(os); 1998 this.e = Objects.requireNonNull(e, "Zip entry is null"); 1999 this.crc = new CRC32(); 2000 } 2001 2002 @Override 2003 public void write(int b) throws IOException { 2004 out.write(b); 2005 crc.update(b); 2006 written += 1; 2007 } 2008 2009 @Override 2010 public void write(byte[] b, int off, int len) 2011 throws IOException { 2012 out.write(b, off, len); 2013 crc.update(b, off, len); 2014 written += len; 2015 } 2016 2017 @Override 2018 public void close() { 2019 if (isClosed) 2020 return; 2021 isClosed = true; 2022 e.size = e.csize = written; 2023 e.crc = crc.getValue(); 2024 } 2025 } 2026 2027 // Wrapper output stream class to write out a "deflated" entry. 2028 // (1) this class does not close the underlying out stream when 2029 // being closed. 2030 // (2) no need to be "synchronized", only used by sync() 2031 private class EntryOutputStreamDef extends DeflaterOutputStream { 2032 private final CRC32 crc; 2033 private final Entry e; 2034 private boolean isClosed; 2035 2036 EntryOutputStreamDef(Entry e, OutputStream os) { 2037 super(os, getDeflater()); 2038 this.e = Objects.requireNonNull(e, "Zip entry is null"); 2039 this.crc = new CRC32(); 2040 } 2041 2042 @Override 2043 public void write(byte[] b, int off, int len) throws IOException { 2044 super.write(b, off, len); 2045 crc.update(b, off, len); 2046 } 2047 2048 @Override 2049 public void close() throws IOException { 2050 if (isClosed) 2051 return; 2052 isClosed = true; 2053 finish(); 2054 e.size = def.getBytesRead(); 2055 e.csize = def.getBytesWritten(); 2056 e.crc = crc.getValue(); 2057 releaseDeflater(def); 2058 } 2059 } 2060 2061 private InputStream getInputStream(Entry e) 2062 throws IOException 2063 { 2064 InputStream eis; 2065 if (e.type == Entry.NEW) { 2066 if (e.bytes != null) 2067 eis = new ByteArrayInputStream(e.bytes); 2068 else if (e.file != null) 2069 eis = Files.newInputStream(e.file); 2070 else 2071 throw new ZipException("update entry data is missing"); 2072 } else if (e.type == Entry.FILECH) { 2073 // FILECH result is un-compressed. 2074 eis = Files.newInputStream(e.file); 2075 // TBD: wrap to hook close() 2076 // streams.add(eis); 2077 return eis; 2078 } else { // untouched CEN or COPY 2079 eis = new EntryInputStream(e, ch); 2080 } 2081 if (e.method == METHOD_DEFLATED) { 2082 // MORE: Compute good size for inflater stream: 2083 long bufSize = e.size + 2; // Inflater likes a bit of slack 2084 if (bufSize > 65536) 2085 bufSize = 8192; 2086 final long size = e.size; 2087 eis = new InflaterInputStream(eis, getInflater(), (int)bufSize) { 2088 private boolean isClosed = false; 2089 public void close() throws IOException { 2090 if (!isClosed) { 2091 releaseInflater(inf); 2092 this.in.close(); 2093 isClosed = true; 2094 streams.remove(this); 2095 } 2096 } 2097 // Override fill() method to provide an extra "dummy" byte 2098 // at the end of the input stream. This is required when 2099 // using the "nowrap" Inflater option. (it appears the new 2100 // zlib in 7 does not need it, but keep it for now) 2101 protected void fill() throws IOException { 2102 if (eof) { 2103 throw new EOFException( 2104 "Unexpected end of ZLIB input stream"); 2105 } 2106 len = this.in.read(buf, 0, buf.length); 2107 if (len == -1) { 2108 buf[0] = 0; 2109 len = 1; 2110 eof = true; 2111 } 2112 inf.setInput(buf, 0, len); 2113 } 2114 private boolean eof; 2115 2116 public int available() { 2117 if (isClosed) 2118 return 0; 2119 long avail = size - inf.getBytesWritten(); 2120 return avail > (long) Integer.MAX_VALUE ? 2121 Integer.MAX_VALUE : (int) avail; 2122 } 2123 }; 2124 } else if (e.method == METHOD_STORED) { 2125 // TBD: wrap/ it does not seem necessary 2126 } else { 2127 throw new ZipException("invalid compression method"); 2128 } 2129 streams.add(eis); 2130 return eis; 2131 } 2132 2133 // Inner class implementing the input stream used to read 2134 // a (possibly compressed) zip file entry. 2135 private class EntryInputStream extends InputStream { 2136 private final SeekableByteChannel zfch; // local ref to zipfs's "ch". zipfs.ch might 2137 // point to a new channel after sync() 2138 private long pos; // current position within entry data 2139 private long rem; // number of remaining bytes within entry 2140 2141 EntryInputStream(Entry e, SeekableByteChannel zfch) 2142 throws IOException 2143 { 2144 this.zfch = zfch; 2145 rem = e.csize; 2146 pos = e.locoff; 2147 if (pos == -1) { 2148 Entry e2 = getEntry(e.name); 2149 if (e2 == null) { 2150 throw new ZipException("invalid loc for entry <" + getString(e.name) + ">"); 2151 } 2152 pos = e2.locoff; 2153 } 2154 pos = -pos; // lazy initialize the real data offset 2155 } 2156 2157 public int read(byte[] b, int off, int len) throws IOException { 2158 ensureOpen(); 2159 initDataPos(); 2160 if (rem == 0) { 2161 return -1; 2162 } 2163 if (len <= 0) { 2164 return 0; 2165 } 2166 if (len > rem) { 2167 len = (int) rem; 2168 } 2169 // readFullyAt() 2170 long n; 2171 ByteBuffer bb = ByteBuffer.wrap(b); 2172 bb.position(off); 2173 bb.limit(off + len); 2174 synchronized(zfch) { 2175 n = zfch.position(pos).read(bb); 2176 } 2177 if (n > 0) { 2178 pos += n; 2179 rem -= n; 2180 } 2181 if (rem == 0) { 2182 close(); 2183 } 2184 return (int)n; 2185 } 2186 2187 public int read() throws IOException { 2188 byte[] b = new byte[1]; 2189 if (read(b, 0, 1) == 1) { 2190 return b[0] & 0xff; 2191 } else { 2192 return -1; 2193 } 2194 } 2195 2196 public long skip(long n) { 2197 ensureOpen(); 2198 if (n > rem) 2199 n = rem; 2200 pos += n; 2201 rem -= n; 2202 if (rem == 0) { 2203 close(); 2204 } 2205 return n; 2206 } 2207 2208 public int available() { 2209 return rem > Integer.MAX_VALUE ? Integer.MAX_VALUE : (int) rem; 2210 } 2211 2212 public void close() { 2213 rem = 0; 2214 streams.remove(this); 2215 } 2216 2217 private void initDataPos() throws IOException { 2218 if (pos <= 0) { 2219 pos = -pos + locpos; 2220 byte[] buf = new byte[LOCHDR]; 2221 if (readFullyAt(buf, 0, buf.length, pos) != LOCHDR) { 2222 throw new ZipException("invalid loc " + pos + " for entry reading"); 2223 } 2224 pos += LOCHDR + LOCNAM(buf) + LOCEXT(buf); 2225 } 2226 } 2227 } 2228 2229 // Maxmum number of de/inflater we cache 2230 private final int MAX_FLATER = 20; 2231 // List of available Inflater objects for decompression 2232 private final List<Inflater> inflaters = new ArrayList<>(); 2233 2234 // Gets an inflater from the list of available inflaters or allocates 2235 // a new one. 2236 private Inflater getInflater() { 2237 synchronized (inflaters) { 2238 int size = inflaters.size(); 2239 if (size > 0) { 2240 return inflaters.remove(size - 1); 2241 } else { 2242 return new Inflater(true); 2243 } 2244 } 2245 } 2246 2247 // Releases the specified inflater to the list of available inflaters. 2248 private void releaseInflater(Inflater inf) { 2249 synchronized (inflaters) { 2250 if (inflaters.size() < MAX_FLATER) { 2251 inf.reset(); 2252 inflaters.add(inf); 2253 } else { 2254 inf.end(); 2255 } 2256 } 2257 } 2258 2259 // List of available Deflater objects for compression 2260 private final List<Deflater> deflaters = new ArrayList<>(); 2261 2262 // Gets a deflater from the list of available deflaters or allocates 2263 // a new one. 2264 private Deflater getDeflater() { 2265 synchronized (deflaters) { 2266 int size = deflaters.size(); 2267 if (size > 0) { 2268 return deflaters.remove(size - 1); 2269 } else { 2270 return new Deflater(Deflater.DEFAULT_COMPRESSION, true); 2271 } 2272 } 2273 } 2274 2275 // Releases the specified inflater to the list of available inflaters. 2276 private void releaseDeflater(Deflater def) { 2277 synchronized (deflaters) { 2278 if (deflaters.size() < MAX_FLATER) { 2279 def.reset(); 2280 deflaters.add(def); 2281 } else { 2282 def.end(); 2283 } 2284 } 2285 } 2286 2287 // End of central directory record 2288 static class END { 2289 // The fields that are commented out below are not used by anyone and write() uses "0" 2290 // int disknum; 2291 // int sdisknum; 2292 // int endsub; 2293 int centot; // 4 bytes 2294 long cenlen; // 4 bytes 2295 long cenoff; // 4 bytes 2296 // int comlen; // comment length 2297 // byte[] comment; 2298 2299 // members of Zip64 end of central directory locator 2300 // int diskNum; 2301 long endpos; 2302 // int disktot; 2303 2304 void write(OutputStream os, long offset, boolean forceEnd64) throws IOException { 2305 boolean hasZip64 = forceEnd64; // false; 2306 long xlen = cenlen; 2307 long xoff = cenoff; 2308 if (xlen >= ZIP64_MINVAL) { 2309 xlen = ZIP64_MINVAL; 2310 hasZip64 = true; 2311 } 2312 if (xoff >= ZIP64_MINVAL) { 2313 xoff = ZIP64_MINVAL; 2314 hasZip64 = true; 2315 } 2316 int count = centot; 2317 if (count >= ZIP64_MINVAL32) { 2318 count = ZIP64_MINVAL32; 2319 hasZip64 = true; 2320 } 2321 if (hasZip64) { 2322 //zip64 end of central directory record 2323 writeInt(os, ZIP64_ENDSIG); // zip64 END record signature 2324 writeLong(os, ZIP64_ENDHDR - 12); // size of zip64 end 2325 writeShort(os, 45); // version made by 2326 writeShort(os, 45); // version needed to extract 2327 writeInt(os, 0); // number of this disk 2328 writeInt(os, 0); // central directory start disk 2329 writeLong(os, centot); // number of directory entries on disk 2330 writeLong(os, centot); // number of directory entries 2331 writeLong(os, cenlen); // length of central directory 2332 writeLong(os, cenoff); // offset of central directory 2333 2334 //zip64 end of central directory locator 2335 writeInt(os, ZIP64_LOCSIG); // zip64 END locator signature 2336 writeInt(os, 0); // zip64 END start disk 2337 writeLong(os, offset); // offset of zip64 END 2338 writeInt(os, 1); // total number of disks (?) 2339 } 2340 writeInt(os, ENDSIG); // END record signature 2341 writeShort(os, 0); // number of this disk 2342 writeShort(os, 0); // central directory start disk 2343 writeShort(os, count); // number of directory entries on disk 2344 writeShort(os, count); // total number of directory entries 2345 writeInt(os, xlen); // length of central directory 2346 writeInt(os, xoff); // offset of central directory 2347 writeShort(os, 0); // zip file comment, not used 2348 } 2349 } 2350 2351 // Internal node that links a "name" to its pos in cen table. 2352 // The node itself can be used as a "key" to lookup itself in 2353 // the HashMap inodes. 2354 static class IndexNode { 2355 byte[] name; 2356 int hashcode; // node is hashable/hashed by its name 2357 boolean isdir; 2358 int pos = -1; // position in cen table, -1 means the 2359 // entry does not exist in zip file 2360 IndexNode child; // first child 2361 IndexNode sibling; // next sibling 2362 2363 IndexNode() {} 2364 2365 IndexNode(byte[] name, boolean isdir) { 2366 name(name); 2367 this.isdir = isdir; 2368 this.pos = -1; 2369 } 2370 2371 IndexNode(byte[] name, int pos) { 2372 name(name); 2373 this.pos = pos; 2374 } 2375 2376 // constructor for initCEN() (1) remove trailing '/' (2) pad leading '/' 2377 IndexNode(byte[] cen, int pos, int nlen) { 2378 int noff = pos + CENHDR; 2379 if (cen[noff + nlen - 1] == '/') { 2380 isdir = true; 2381 nlen--; 2382 } 2383 if (nlen > 0 && cen[noff] == '/') { 2384 name = Arrays.copyOfRange(cen, noff, noff + nlen); 2385 } else { 2386 name = new byte[nlen + 1]; 2387 System.arraycopy(cen, noff, name, 1, nlen); 2388 name[0] = '/'; 2389 } 2390 name(normalize(name)); 2391 this.pos = pos; 2392 } 2393 2394 // Normalize the IndexNode.name field. 2395 private byte[] normalize(byte[] path) { 2396 int len = path.length; 2397 if (len == 0) 2398 return path; 2399 byte prevC = 0; 2400 for (int pathPos = 0; pathPos < len; pathPos++) { 2401 byte c = path[pathPos]; 2402 if (c == '/' && prevC == '/') 2403 return normalize(path, pathPos - 1); 2404 prevC = c; 2405 } 2406 if (len > 1 && prevC == '/') { 2407 return Arrays.copyOf(path, len - 1); 2408 } 2409 return path; 2410 } 2411 2412 private byte[] normalize(byte[] path, int off) { 2413 // As we know we have at least one / to trim, we can reduce 2414 // the size of the resulting array 2415 byte[] to = new byte[path.length - 1]; 2416 int pathPos = 0; 2417 while (pathPos < off) { 2418 to[pathPos] = path[pathPos]; 2419 pathPos++; 2420 } 2421 int toPos = pathPos; 2422 byte prevC = 0; 2423 while (pathPos < path.length) { 2424 byte c = path[pathPos++]; 2425 if (c == '/' && prevC == '/') 2426 continue; 2427 to[toPos++] = c; 2428 prevC = c; 2429 } 2430 if (toPos > 1 && to[toPos - 1] == '/') 2431 toPos--; 2432 return (toPos == to.length) ? to : Arrays.copyOf(to, toPos); 2433 } 2434 2435 private static final ThreadLocal<IndexNode> cachedKey = new ThreadLocal<>(); 2436 2437 static final IndexNode keyOf(byte[] name) { // get a lookup key; 2438 IndexNode key = cachedKey.get(); 2439 if (key == null) { 2440 key = new IndexNode(name, -1); 2441 cachedKey.set(key); 2442 } 2443 return key.as(name); 2444 } 2445 2446 final void name(byte[] name) { 2447 this.name = name; 2448 this.hashcode = Arrays.hashCode(name); 2449 } 2450 2451 final IndexNode as(byte[] name) { // reuse the node, mostly 2452 name(name); // as a lookup "key" 2453 return this; 2454 } 2455 2456 boolean isDir() { 2457 return isdir; 2458 } 2459 2460 @Override 2461 public boolean equals(Object other) { 2462 if (!(other instanceof IndexNode)) { 2463 return false; 2464 } 2465 if (other instanceof ParentLookup) { 2466 return ((ParentLookup)other).equals(this); 2467 } 2468 return Arrays.equals(name, ((IndexNode)other).name); 2469 } 2470 2471 @Override 2472 public int hashCode() { 2473 return hashcode; 2474 } 2475 2476 @Override 2477 public String toString() { 2478 return new String(name) + (isdir ? " (dir)" : " ") + ", index: " + pos; 2479 } 2480 } 2481 2482 static class Entry extends IndexNode implements ZipFileAttributes { 2483 static final int CEN = 1; // entry read from cen 2484 static final int NEW = 2; // updated contents in bytes or file 2485 static final int FILECH = 3; // fch update in "file" 2486 static final int COPY = 4; // copy of a CEN entry 2487 2488 byte[] bytes; // updated content bytes 2489 Path file; // use tmp file to store bytes; 2490 int type = CEN; // default is the entry read from cen 2491 2492 // entry attributes 2493 int version; 2494 int flag; 2495 int posixPerms = -1; // posix permissions 2496 int method = -1; // compression method 2497 long mtime = -1; // last modification time (in DOS time) 2498 long atime = -1; // last access time 2499 long ctime = -1; // create time 2500 long crc = -1; // crc-32 of entry data 2501 long csize = -1; // compressed size of entry data 2502 long size = -1; // uncompressed size of entry data 2503 byte[] extra; 2504 2505 // CEN 2506 // The fields that are commented out below are not used by anyone and write() uses "0" 2507 // int versionMade; 2508 // int disk; 2509 // int attrs; 2510 // long attrsEx; 2511 long locoff; 2512 byte[] comment; 2513 2514 Entry(byte[] name, boolean isdir, int method) { 2515 name(name); 2516 this.isdir = isdir; 2517 this.mtime = this.ctime = this.atime = System.currentTimeMillis(); 2518 this.crc = 0; 2519 this.size = 0; 2520 this.csize = 0; 2521 this.method = method; 2522 } 2523 2524 @SuppressWarnings("unchecked") 2525 Entry(byte[] name, int type, boolean isdir, int method, FileAttribute<?>... attrs) { 2526 this(name, isdir, method); 2527 this.type = type; 2528 for (FileAttribute<?> attr : attrs) { 2529 String attrName = attr.name(); 2530 if (attrName.equals("posix:permissions")) { 2531 posixPerms = ZipUtils.permsToFlags((Set<PosixFilePermission>)attr.value()); 2532 } 2533 } 2534 } 2535 2536 Entry(byte[] name, Path file, int type, FileAttribute<?>... attrs) { 2537 this(name, type, false, METHOD_STORED, attrs); 2538 this.file = file; 2539 } 2540 2541 Entry(Entry e, int type, int compressionMethod) { 2542 this(e, type); 2543 this.method = compressionMethod; 2544 } 2545 2546 Entry(Entry e, int type) { 2547 name(e.name); 2548 this.isdir = e.isdir; 2549 this.version = e.version; 2550 this.ctime = e.ctime; 2551 this.atime = e.atime; 2552 this.mtime = e.mtime; 2553 this.crc = e.crc; 2554 this.size = e.size; 2555 this.csize = e.csize; 2556 this.method = e.method; 2557 this.extra = e.extra; 2558 /* 2559 this.versionMade = e.versionMade; 2560 this.disk = e.disk; 2561 this.attrs = e.attrs; 2562 this.attrsEx = e.attrsEx; 2563 */ 2564 this.locoff = e.locoff; 2565 this.comment = e.comment; 2566 this.posixPerms = e.posixPerms; 2567 this.type = type; 2568 } 2569 2570 Entry(ZipFileSystem zipfs, IndexNode inode) throws IOException { 2571 readCEN(zipfs, inode); 2572 } 2573 2574 // Calculates a suitable base for the version number to 2575 // be used for fields version made by/version needed to extract. 2576 // The lower bytes of these 2 byte fields hold the version number 2577 // (value/10 = major; value%10 = minor) 2578 // For different features certain minimum versions apply: 2579 // stored = 10 (1.0), deflated = 20 (2.0), zip64 = 45 (4.5) 2580 private int version(boolean zip64) throws ZipException { 2581 if (zip64) { 2582 return 45; 2583 } 2584 if (method == METHOD_DEFLATED) 2585 return 20; 2586 else if (method == METHOD_STORED) 2587 return 10; 2588 throw new ZipException("unsupported compression method"); 2589 } 2590 2591 /** 2592 * Adds information about compatibility of file attribute information 2593 * to a version value. 2594 */ 2595 private int versionMadeBy(int version) { 2596 return (posixPerms < 0) ? version : 2597 VERSION_MADE_BY_BASE_UNIX | (version & 0xff); 2598 } 2599 2600 ///////////////////// CEN ////////////////////// 2601 private void readCEN(ZipFileSystem zipfs, IndexNode inode) throws IOException { 2602 byte[] cen = zipfs.cen; 2603 int pos = inode.pos; 2604 if (!cenSigAt(cen, pos)) 2605 throw new ZipException("invalid CEN header (bad signature)"); 2606 version = CENVER(cen, pos); 2607 flag = CENFLG(cen, pos); 2608 method = CENHOW(cen, pos); 2609 mtime = dosToJavaTime(CENTIM(cen, pos)); 2610 crc = CENCRC(cen, pos); 2611 csize = CENSIZ(cen, pos); 2612 size = CENLEN(cen, pos); 2613 int nlen = CENNAM(cen, pos); 2614 int elen = CENEXT(cen, pos); 2615 int clen = CENCOM(cen, pos); 2616 /* 2617 versionMade = CENVEM(cen, pos); 2618 disk = CENDSK(cen, pos); 2619 attrs = CENATT(cen, pos); 2620 attrsEx = CENATX(cen, pos); 2621 */ 2622 if (CENVEM_FA(cen, pos) == FILE_ATTRIBUTES_UNIX) { 2623 posixPerms = CENATX_PERMS(cen, pos) & 0xFFF; // 12 bits for setuid, setgid, sticky + perms 2624 } 2625 locoff = CENOFF(cen, pos); 2626 pos += CENHDR; 2627 this.name = inode.name; 2628 this.isdir = inode.isdir; 2629 this.hashcode = inode.hashcode; 2630 2631 pos += nlen; 2632 if (elen > 0) { 2633 extra = Arrays.copyOfRange(cen, pos, pos + elen); 2634 pos += elen; 2635 readExtra(zipfs); 2636 } 2637 if (clen > 0) { 2638 comment = Arrays.copyOfRange(cen, pos, pos + clen); 2639 } 2640 } 2641 2642 private int writeCEN(OutputStream os) throws IOException { 2643 long csize0 = csize; 2644 long size0 = size; 2645 long locoff0 = locoff; 2646 int elen64 = 0; // extra for ZIP64 2647 int elenNTFS = 0; // extra for NTFS (a/c/mtime) 2648 int elenEXTT = 0; // extra for Extended Timestamp 2649 boolean foundExtraTime = false; // if time stamp NTFS, EXTT present 2650 2651 byte[] zname = isdir ? toDirectoryPath(name) : name; 2652 2653 // confirm size/length 2654 int nlen = (zname != null) ? zname.length - 1 : 0; // name has [0] as "slash" 2655 int elen = (extra != null) ? extra.length : 0; 2656 int eoff = 0; 2657 int clen = (comment != null) ? comment.length : 0; 2658 if (csize >= ZIP64_MINVAL) { 2659 csize0 = ZIP64_MINVAL; 2660 elen64 += 8; // csize(8) 2661 } 2662 if (size >= ZIP64_MINVAL) { 2663 size0 = ZIP64_MINVAL; // size(8) 2664 elen64 += 8; 2665 } 2666 if (locoff >= ZIP64_MINVAL) { 2667 locoff0 = ZIP64_MINVAL; 2668 elen64 += 8; // offset(8) 2669 } 2670 if (elen64 != 0) { 2671 elen64 += 4; // header and data sz 4 bytes 2672 } 2673 boolean zip64 = (elen64 != 0); 2674 int version0 = version(zip64); 2675 while (eoff + 4 < elen) { 2676 int tag = SH(extra, eoff); 2677 int sz = SH(extra, eoff + 2); 2678 if (tag == EXTID_EXTT || tag == EXTID_NTFS) { 2679 foundExtraTime = true; 2680 } 2681 eoff += (4 + sz); 2682 } 2683 if (!foundExtraTime) { 2684 if (isWindows) { // use NTFS 2685 elenNTFS = 36; // total 36 bytes 2686 } else { // Extended Timestamp otherwise 2687 elenEXTT = 9; // only mtime in cen 2688 } 2689 } 2690 writeInt(os, CENSIG); // CEN header signature 2691 writeShort(os, versionMadeBy(version0)); // version made by 2692 writeShort(os, version0); // version needed to extract 2693 writeShort(os, flag); // general purpose bit flag 2694 writeShort(os, method); // compression method 2695 // last modification time 2696 writeInt(os, (int)javaToDosTime(mtime)); 2697 writeInt(os, crc); // crc-32 2698 writeInt(os, csize0); // compressed size 2699 writeInt(os, size0); // uncompressed size 2700 writeShort(os, nlen); 2701 writeShort(os, elen + elen64 + elenNTFS + elenEXTT); 2702 2703 if (comment != null) { 2704 writeShort(os, Math.min(clen, 0xffff)); 2705 } else { 2706 writeShort(os, 0); 2707 } 2708 writeShort(os, 0); // starting disk number 2709 writeShort(os, 0); // internal file attributes (unused) 2710 writeInt(os, posixPerms > 0 ? posixPerms << 16 : 0); // external file 2711 // attributes, used for storing posix 2712 // permissions 2713 writeInt(os, locoff0); // relative offset of local header 2714 writeBytes(os, zname, 1, nlen); 2715 if (zip64) { 2716 writeShort(os, EXTID_ZIP64);// Zip64 extra 2717 writeShort(os, elen64 - 4); // size of "this" extra block 2718 if (size0 == ZIP64_MINVAL) 2719 writeLong(os, size); 2720 if (csize0 == ZIP64_MINVAL) 2721 writeLong(os, csize); 2722 if (locoff0 == ZIP64_MINVAL) 2723 writeLong(os, locoff); 2724 } 2725 if (elenNTFS != 0) { 2726 writeShort(os, EXTID_NTFS); 2727 writeShort(os, elenNTFS - 4); 2728 writeInt(os, 0); // reserved 2729 writeShort(os, 0x0001); // NTFS attr tag 2730 writeShort(os, 24); 2731 writeLong(os, javaToWinTime(mtime)); 2732 writeLong(os, javaToWinTime(atime)); 2733 writeLong(os, javaToWinTime(ctime)); 2734 } 2735 if (elenEXTT != 0) { 2736 writeShort(os, EXTID_EXTT); 2737 writeShort(os, elenEXTT - 4); 2738 if (ctime == -1) 2739 os.write(0x3); // mtime and atime 2740 else 2741 os.write(0x7); // mtime, atime and ctime 2742 writeInt(os, javaToUnixTime(mtime)); 2743 } 2744 if (extra != null) // whatever not recognized 2745 writeBytes(os, extra); 2746 if (comment != null) //TBD: 0, Math.min(commentBytes.length, 0xffff)); 2747 writeBytes(os, comment); 2748 return CENHDR + nlen + elen + clen + elen64 + elenNTFS + elenEXTT; 2749 } 2750 2751 ///////////////////// LOC ////////////////////// 2752 2753 private int writeLOC(OutputStream os) throws IOException { 2754 byte[] zname = isdir ? toDirectoryPath(name) : name; 2755 int nlen = (zname != null) ? zname.length - 1 : 0; // [0] is slash 2756 int elen = (extra != null) ? extra.length : 0; 2757 boolean foundExtraTime = false; // if extra timestamp present 2758 int eoff = 0; 2759 int elen64 = 0; 2760 boolean zip64 = false; 2761 int elenEXTT = 0; 2762 int elenNTFS = 0; 2763 writeInt(os, LOCSIG); // LOC header signature 2764 if ((flag & FLAG_DATADESCR) != 0) { 2765 writeShort(os, version(false)); // version needed to extract 2766 writeShort(os, flag); // general purpose bit flag 2767 writeShort(os, method); // compression method 2768 // last modification time 2769 writeInt(os, (int)javaToDosTime(mtime)); 2770 // store size, uncompressed size, and crc-32 in data descriptor 2771 // immediately following compressed entry data 2772 writeInt(os, 0); 2773 writeInt(os, 0); 2774 writeInt(os, 0); 2775 } else { 2776 if (csize >= ZIP64_MINVAL || size >= ZIP64_MINVAL) { 2777 elen64 = 20; //headid(2) + size(2) + size(8) + csize(8) 2778 zip64 = true; 2779 } 2780 writeShort(os, version(zip64)); // version needed to extract 2781 writeShort(os, flag); // general purpose bit flag 2782 writeShort(os, method); // compression method 2783 // last modification time 2784 writeInt(os, (int)javaToDosTime(mtime)); 2785 writeInt(os, crc); // crc-32 2786 if (zip64) { 2787 writeInt(os, ZIP64_MINVAL); 2788 writeInt(os, ZIP64_MINVAL); 2789 } else { 2790 writeInt(os, csize); // compressed size 2791 writeInt(os, size); // uncompressed size 2792 } 2793 } 2794 while (eoff + 4 < elen) { 2795 int tag = SH(extra, eoff); 2796 int sz = SH(extra, eoff + 2); 2797 if (tag == EXTID_EXTT || tag == EXTID_NTFS) { 2798 foundExtraTime = true; 2799 } 2800 eoff += (4 + sz); 2801 } 2802 if (!foundExtraTime) { 2803 if (isWindows) { 2804 elenNTFS = 36; // NTFS, total 36 bytes 2805 } else { // on unix use "ext time" 2806 elenEXTT = 9; 2807 if (atime != -1) 2808 elenEXTT += 4; 2809 if (ctime != -1) 2810 elenEXTT += 4; 2811 } 2812 } 2813 writeShort(os, nlen); 2814 writeShort(os, elen + elen64 + elenNTFS + elenEXTT); 2815 writeBytes(os, zname, 1, nlen); 2816 if (zip64) { 2817 writeShort(os, EXTID_ZIP64); 2818 writeShort(os, 16); 2819 writeLong(os, size); 2820 writeLong(os, csize); 2821 } 2822 if (elenNTFS != 0) { 2823 writeShort(os, EXTID_NTFS); 2824 writeShort(os, elenNTFS - 4); 2825 writeInt(os, 0); // reserved 2826 writeShort(os, 0x0001); // NTFS attr tag 2827 writeShort(os, 24); 2828 writeLong(os, javaToWinTime(mtime)); 2829 writeLong(os, javaToWinTime(atime)); 2830 writeLong(os, javaToWinTime(ctime)); 2831 } 2832 if (elenEXTT != 0) { 2833 writeShort(os, EXTID_EXTT); 2834 writeShort(os, elenEXTT - 4);// size for the folowing data block 2835 int fbyte = 0x1; 2836 if (atime != -1) // mtime and atime 2837 fbyte |= 0x2; 2838 if (ctime != -1) // mtime, atime and ctime 2839 fbyte |= 0x4; 2840 os.write(fbyte); // flags byte 2841 writeInt(os, javaToUnixTime(mtime)); 2842 if (atime != -1) 2843 writeInt(os, javaToUnixTime(atime)); 2844 if (ctime != -1) 2845 writeInt(os, javaToUnixTime(ctime)); 2846 } 2847 if (extra != null) { 2848 writeBytes(os, extra); 2849 } 2850 return LOCHDR + nlen + elen + elen64 + elenNTFS + elenEXTT; 2851 } 2852 2853 // Data Descriptor 2854 private int writeEXT(OutputStream os) throws IOException { 2855 writeInt(os, EXTSIG); // EXT header signature 2856 writeInt(os, crc); // crc-32 2857 if (csize >= ZIP64_MINVAL || size >= ZIP64_MINVAL) { 2858 writeLong(os, csize); 2859 writeLong(os, size); 2860 return 24; 2861 } else { 2862 writeInt(os, csize); // compressed size 2863 writeInt(os, size); // uncompressed size 2864 return 16; 2865 } 2866 } 2867 2868 // read NTFS, UNIX and ZIP64 data from cen.extra 2869 private void readExtra(ZipFileSystem zipfs) throws IOException { 2870 if (extra == null) 2871 return; 2872 int elen = extra.length; 2873 int off = 0; 2874 int newOff = 0; 2875 while (off + 4 < elen) { 2876 // extra spec: HeaderID+DataSize+Data 2877 int pos = off; 2878 int tag = SH(extra, pos); 2879 int sz = SH(extra, pos + 2); 2880 pos += 4; 2881 if (pos + sz > elen) // invalid data 2882 break; 2883 switch (tag) { 2884 case EXTID_ZIP64 : 2885 if (size == ZIP64_MINVAL) { 2886 if (pos + 8 > elen) // invalid zip64 extra 2887 break; // fields, just skip 2888 size = LL(extra, pos); 2889 pos += 8; 2890 } 2891 if (csize == ZIP64_MINVAL) { 2892 if (pos + 8 > elen) 2893 break; 2894 csize = LL(extra, pos); 2895 pos += 8; 2896 } 2897 if (locoff == ZIP64_MINVAL) { 2898 if (pos + 8 > elen) 2899 break; 2900 locoff = LL(extra, pos); 2901 } 2902 break; 2903 case EXTID_NTFS: 2904 if (sz < 32) 2905 break; 2906 pos += 4; // reserved 4 bytes 2907 if (SH(extra, pos) != 0x0001) 2908 break; 2909 if (SH(extra, pos + 2) != 24) 2910 break; 2911 // override the loc field, datatime here is 2912 // more "accurate" 2913 mtime = winToJavaTime(LL(extra, pos + 4)); 2914 atime = winToJavaTime(LL(extra, pos + 12)); 2915 ctime = winToJavaTime(LL(extra, pos + 20)); 2916 break; 2917 case EXTID_EXTT: 2918 // spec says the Extened timestamp in cen only has mtime 2919 // need to read the loc to get the extra a/ctime, if flag 2920 // "zipinfo-time" is not specified to false; 2921 // there is performance cost (move up to loc and read) to 2922 // access the loc table foreach entry; 2923 if (zipfs.noExtt) { 2924 if (sz == 5) 2925 mtime = unixToJavaTime(LG(extra, pos + 1)); 2926 break; 2927 } 2928 byte[] buf = new byte[LOCHDR]; 2929 if (zipfs.readFullyAt(buf, 0, buf.length , locoff) 2930 != buf.length) 2931 throw new ZipException("loc: reading failed"); 2932 if (!locSigAt(buf, 0)) 2933 throw new ZipException("loc: wrong sig ->" 2934 + Long.toString(getSig(buf, 0), 16)); 2935 int locElen = LOCEXT(buf); 2936 if (locElen < 9) // EXTT is at least 9 bytes 2937 break; 2938 int locNlen = LOCNAM(buf); 2939 buf = new byte[locElen]; 2940 if (zipfs.readFullyAt(buf, 0, buf.length , locoff + LOCHDR + locNlen) 2941 != buf.length) 2942 throw new ZipException("loc extra: reading failed"); 2943 int locPos = 0; 2944 while (locPos + 4 < buf.length) { 2945 int locTag = SH(buf, locPos); 2946 int locSZ = SH(buf, locPos + 2); 2947 locPos += 4; 2948 if (locTag != EXTID_EXTT) { 2949 locPos += locSZ; 2950 continue; 2951 } 2952 int end = locPos + locSZ - 4; 2953 int flag = CH(buf, locPos++); 2954 if ((flag & 0x1) != 0 && locPos <= end) { 2955 mtime = unixToJavaTime(LG(buf, locPos)); 2956 locPos += 4; 2957 } 2958 if ((flag & 0x2) != 0 && locPos <= end) { 2959 atime = unixToJavaTime(LG(buf, locPos)); 2960 locPos += 4; 2961 } 2962 if ((flag & 0x4) != 0 && locPos <= end) { 2963 ctime = unixToJavaTime(LG(buf, locPos)); 2964 } 2965 break; 2966 } 2967 break; 2968 default: // unknown tag 2969 System.arraycopy(extra, off, extra, newOff, sz + 4); 2970 newOff += (sz + 4); 2971 } 2972 off += (sz + 4); 2973 } 2974 if (newOff != 0 && newOff != extra.length) 2975 extra = Arrays.copyOf(extra, newOff); 2976 else 2977 extra = null; 2978 } 2979 2980 @Override 2981 public String toString() { 2982 StringBuilder sb = new StringBuilder(1024); 2983 Formatter fm = new Formatter(sb); 2984 fm.format(" name : %s%n", new String(name)); 2985 fm.format(" creationTime : %tc%n", creationTime().toMillis()); 2986 fm.format(" lastAccessTime : %tc%n", lastAccessTime().toMillis()); 2987 fm.format(" lastModifiedTime: %tc%n", lastModifiedTime().toMillis()); 2988 fm.format(" isRegularFile : %b%n", isRegularFile()); 2989 fm.format(" isDirectory : %b%n", isDirectory()); 2990 fm.format(" isSymbolicLink : %b%n", isSymbolicLink()); 2991 fm.format(" isOther : %b%n", isOther()); 2992 fm.format(" fileKey : %s%n", fileKey()); 2993 fm.format(" size : %d%n", size()); 2994 fm.format(" compressedSize : %d%n", compressedSize()); 2995 fm.format(" crc : %x%n", crc()); 2996 fm.format(" method : %d%n", method()); 2997 Set<PosixFilePermission> permissions = storedPermissions().orElse(null); 2998 if (permissions != null) { 2999 fm.format(" permissions : %s%n", permissions); 3000 } 3001 fm.close(); 3002 return sb.toString(); 3003 } 3004 3005 ///////// basic file attributes /////////// 3006 @Override 3007 public FileTime creationTime() { 3008 return FileTime.fromMillis(ctime == -1 ? mtime : ctime); 3009 } 3010 3011 @Override 3012 public boolean isDirectory() { 3013 return isDir(); 3014 } 3015 3016 @Override 3017 public boolean isOther() { 3018 return false; 3019 } 3020 3021 @Override 3022 public boolean isRegularFile() { 3023 return !isDir(); 3024 } 3025 3026 @Override 3027 public FileTime lastAccessTime() { 3028 return FileTime.fromMillis(atime == -1 ? mtime : atime); 3029 } 3030 3031 @Override 3032 public FileTime lastModifiedTime() { 3033 return FileTime.fromMillis(mtime); 3034 } 3035 3036 @Override 3037 public long size() { 3038 return size; 3039 } 3040 3041 @Override 3042 public boolean isSymbolicLink() { 3043 return false; 3044 } 3045 3046 @Override 3047 public Object fileKey() { 3048 return null; 3049 } 3050 3051 ///////// zip file attributes /////////// 3052 3053 @Override 3054 public long compressedSize() { 3055 return csize; 3056 } 3057 3058 @Override 3059 public long crc() { 3060 return crc; 3061 } 3062 3063 @Override 3064 public int method() { 3065 return method; 3066 } 3067 3068 @Override 3069 public byte[] extra() { 3070 if (extra != null) 3071 return Arrays.copyOf(extra, extra.length); 3072 return null; 3073 } 3074 3075 @Override 3076 public byte[] comment() { 3077 if (comment != null) 3078 return Arrays.copyOf(comment, comment.length); 3079 return null; 3080 } 3081 3082 @Override 3083 public Optional<Set<PosixFilePermission>> storedPermissions() { 3084 Set<PosixFilePermission> perms = null; 3085 if (posixPerms != -1) { 3086 perms = new HashSet<>(PosixFilePermission.values().length); 3087 for (PosixFilePermission perm : PosixFilePermission.values()) { 3088 if ((posixPerms & ZipUtils.permToFlag(perm)) != 0) { 3089 perms.add(perm); 3090 } 3091 } 3092 } 3093 return Optional.ofNullable(perms); 3094 } 3095 } 3096 3097 final class PosixEntry extends Entry implements PosixFileAttributes { 3098 private UserPrincipal owner = defaultOwner; 3099 private GroupPrincipal group = defaultGroup; 3100 3101 PosixEntry(byte[] name, boolean isdir, int method) { 3102 super(name, isdir, method); 3103 } 3104 3105 PosixEntry(byte[] name, int type, boolean isdir, int method, FileAttribute<?>... attrs) { 3106 super(name, type, isdir, method, attrs); 3107 } 3108 3109 PosixEntry(byte[] name, Path file, int type, FileAttribute<?>... attrs) { 3110 super(name, file, type, attrs); 3111 } 3112 3113 PosixEntry(PosixEntry e, int type, int compressionMethod) { 3114 super(e, type); 3115 this.method = compressionMethod; 3116 } 3117 3118 PosixEntry(PosixEntry e, int type) { 3119 super(e, type); 3120 this.owner = e.owner; 3121 this.group = e.group; 3122 } 3123 3124 PosixEntry(ZipFileSystem zipfs, IndexNode inode) throws IOException { 3125 super(zipfs, inode); 3126 } 3127 3128 @Override 3129 public UserPrincipal owner() { 3130 return owner; 3131 } 3132 3133 @Override 3134 public GroupPrincipal group() { 3135 return group; 3136 } 3137 3138 @Override 3139 public Set<PosixFilePermission> permissions() { 3140 return storedPermissions().orElse(Set.copyOf(defaultPermissions)); 3141 } 3142 } 3143 3144 private static class ExistingChannelCloser { 3145 private final Path path; 3146 private final SeekableByteChannel ch; 3147 private final Set<InputStream> streams; 3148 ExistingChannelCloser(Path path, 3149 SeekableByteChannel ch, 3150 Set<InputStream> streams) { 3151 this.path = path; 3152 this.ch = ch; 3153 this.streams = streams; 3154 } 3155 3156 /** 3157 * If there are no more outstanding streams, close the channel and 3158 * delete the backing file 3159 * 3160 * @return true if we're done and closed the backing file, 3161 * otherwise false 3162 * @throws IOException 3163 */ 3164 private boolean closeAndDeleteIfDone() throws IOException { 3165 if (streams.isEmpty()) { 3166 ch.close(); 3167 Files.delete(path); 3168 return true; 3169 } 3170 return false; 3171 } 3172 } 3173 3174 // purely for parent lookup, so we don't have to copy the parent 3175 // name every time 3176 static class ParentLookup extends IndexNode { 3177 int len; 3178 ParentLookup() {} 3179 3180 final ParentLookup as(byte[] name, int len) { // as a lookup "key" 3181 name(name, len); 3182 return this; 3183 } 3184 3185 void name(byte[] name, int len) { 3186 this.name = name; 3187 this.len = len; 3188 // calculate the hashcode the same way as Arrays.hashCode() does 3189 int result = 1; 3190 for (int i = 0; i < len; i++) 3191 result = 31 * result + name[i]; 3192 this.hashcode = result; 3193 } 3194 3195 @Override 3196 public boolean equals(Object other) { 3197 if (!(other instanceof IndexNode)) { 3198 return false; 3199 } 3200 byte[] oname = ((IndexNode)other).name; 3201 return Arrays.equals(name, 0, len, 3202 oname, 0, oname.length); 3203 } 3204 } 3205 }