/// <summary>
/// Search for and read the central directory of a zip file filling the entries array.
/// </summary>
/// <exception cref="System.IO.IOException">
/// An i/o error occurs.
/// </exception>
/// <exception cref="ICSharpCode.SharpZipLib.Zip.ZipException">
/// The central directory is malformed or cannot be found
/// </exception>
void ReadEntries()
{
// Search for the End Of Central Directory. When a zip comment is
// present the directory will start earlier
//
// The search is limited to 64K which is the maximum size of a trailing comment field to aid speed.
// This should be compatible with both SFX and ZIP files but has only been tested for Zip files
// If a SFX file has the Zip data attached as a resource and there are other resources occuring later then
// this could be invalid.
// Could also speed this up by reading memory in larger blocks.
if (baseStream_.CanSeek == false) {
throw new ZipException("ZipFile stream must be seekable");
}
long locatedEndOfCentralDir = LocateBlockWithSignature(ZipConstants.EndOfCentralDirectorySignature,
baseStream_.Length, ZipConstants.EndOfCentralRecordBaseSize, 0xffff);
if (locatedEndOfCentralDir < 0) {
throw new ZipException("Cannot find central directory");
}
// Read end of central directory record
ushort thisDiskNumber = ReadLEUshort();
ushort startCentralDirDisk = ReadLEUshort();
ulong entriesForThisDisk = ReadLEUshort();
ulong entriesForWholeCentralDir = ReadLEUshort();
ulong centralDirSize = ReadLEUint();
long offsetOfCentralDir = ReadLEUint();
uint commentSize = ReadLEUshort();
if ( commentSize > 0 ) {
byte[] comment = new byte[commentSize];
StreamUtils.ReadFully(baseStream_, comment);
comment_ = ZipConstants.ConvertToString(comment);
}
else {
comment_ = string.Empty;
}
bool isZip64 = false;
// Check if zip64 header information is required.
if ( (thisDiskNumber == 0xffff) ||
(startCentralDirDisk == 0xffff) ||
(entriesForThisDisk == 0xffff) ||
(entriesForWholeCentralDir == 0xffff) ||
(centralDirSize == 0xffffffff) ||
(offsetOfCentralDir == 0xffffffff) ) {
isZip64 = true;
long offset = LocateBlockWithSignature(ZipConstants.Zip64CentralDirLocatorSignature, locatedEndOfCentralDir, 0, 0x1000);
if ( offset < 0 ) {
throw new ZipException("Cannot find Zip64 locator");
}
// number of the disk with the start of the zip64 end of central directory 4 bytes
// relative offset of the zip64 end of central directory record 8 bytes
// total number of disks 4 bytes
ReadLEUint(); // startDisk64 is not currently used
ulong offset64 = ReadLEUlong();
uint totalDisks = ReadLEUint();
baseStream_.Position = (long)offset64;
long sig64 = ReadLEUint();
if ( sig64 != ZipConstants.Zip64CentralFileHeaderSignature ) {
throw new ZipException(string.Format("Invalid Zip64 Central directory signature at {0:X}", offset64));
}
// NOTE: Record size = SizeOfFixedFields + SizeOfVariableData - 12.
ulong recordSize = ( ulong )ReadLEUlong();
int versionMadeBy = ReadLEUshort();
int versionToExtract = ReadLEUshort();
uint thisDisk = ReadLEUint();
uint centralDirDisk = ReadLEUint();
entriesForThisDisk = ReadLEUlong();
entriesForWholeCentralDir = ReadLEUlong();
centralDirSize = ReadLEUlong();
offsetOfCentralDir = (long)ReadLEUlong();
// NOTE: zip64 extensible data sector (variable size) is ignored.
}
entries_ = new ZipEntry[entriesForThisDisk];
// SFX/embedded support, find the offset of the first entry vis the start of the stream
// This applies to Zip files that are appended to the end of an SFX stub.
// Or are appended as a resource to an executable.
// Zip files created by some archivers have the offsets altered to reflect the true offsets
// and so dont require any adjustment here...
// TODO: Difficulty with Zip64 and SFX offset handling needs resolution - maths?
if ( !isZip64 && (offsetOfCentralDir < locatedEndOfCentralDir - (4 + (long)centralDirSize)) ) {
offsetOfFirstEntry = locatedEndOfCentralDir - (4 + (long)centralDirSize + offsetOfCentralDir);
if (offsetOfFirstEntry <= 0) {
throw new ZipException("Invalid embedded zip archive");
}
}
baseStream_.Seek(offsetOfFirstEntry + offsetOfCentralDir, SeekOrigin.Begin);
for (ulong i = 0; i < entriesForThisDisk; i++) {
if (ReadLEUint() != ZipConstants.CentralHeaderSignature) {
throw new ZipException("Wrong Central Directory signature");
}
int versionMadeBy = ReadLEUshort();
int versionToExtract = ReadLEUshort();
int bitFlags = ReadLEUshort();
int method = ReadLEUshort();
uint dostime = ReadLEUint();
uint crc = ReadLEUint();
long csize = (long)ReadLEUint();
long size = (long)ReadLEUint();
int nameLen = ReadLEUshort();
int extraLen = ReadLEUshort();
int commentLen = ReadLEUshort();
int diskStartNo = ReadLEUshort(); // Not currently used
int internalAttributes = ReadLEUshort(); // Not currently used
uint externalAttributes = ReadLEUint();
long offset = ReadLEUint();
byte[] buffer = new byte[Math.Max(nameLen, commentLen)];
StreamUtils.ReadFully(baseStream_, buffer, 0, nameLen);
string name = ZipConstants.ConvertToStringExt(bitFlags, buffer, nameLen);
ZipEntry entry = new ZipEntry(name, versionToExtract, versionMadeBy, (CompressionMethod)method);
entry.Crc = crc & 0xffffffffL;
entry.Size = size & 0xffffffffL;
entry.CompressedSize = csize & 0xffffffffL;
entry.Flags = bitFlags;
entry.DosTime = (uint)dostime;
entry.ZipFileIndex = (long)i;
entry.Offset = offset;
entry.ExternalFileAttributes = (int)externalAttributes;
if ((bitFlags & 8) == 0) {
entry.CryptoCheckValue = (byte)(crc >> 24);
}
else {
entry.CryptoCheckValue = (byte)((dostime >> 8) & 0xff);
}
if (extraLen > 0) {
byte[] extra = new byte[extraLen];
StreamUtils.ReadFully(baseStream_, extra);
entry.ExtraData = extra;
}
entry.ProcessExtraData(false);
if (commentLen > 0) {
StreamUtils.ReadFully(baseStream_, buffer, 0, commentLen);
entry.Comment = ZipConstants.ConvertToStringExt(bitFlags, buffer, commentLen);
}
entries_[i] = entry;
}
}
/// <summary>
/// Complete cleanup as the final part of closing.
/// </summary>
/// <param name="testCrc">True if the crc value should be tested</param>
void CompleteCloseEntry(bool testCrc)
{
StopDecrypting();
if ((flags & 8) != 0) {
ReadDataDescriptor();
}
size = 0;
if ( testCrc &&
((crc.Value & 0xFFFFFFFFL) != entry.Crc) && (entry.Crc != -1)) {
throw new ZipException("CRC mismatch");
}
crc.Reset();
if (method == (int)CompressionMethod.Deflated) {
inf.Reset();
}
entry = null;
}
// Write the local file header
// TODO: ZipHelperStream.WriteLocalHeader is not yet used and needs checking for ZipFile and ZipOuptutStream usage
void WriteLocalHeader(ZipEntry entry, EntryPatchData patchData)
{
CompressionMethod method = entry.CompressionMethod;
bool headerInfoAvailable = true; // How to get this?
bool patchEntryHeader = false;
WriteLEInt(ZipConstants.LocalHeaderSignature);
WriteLEShort(entry.Version);
WriteLEShort(entry.Flags);
WriteLEShort((byte)method);
WriteLEInt((int)entry.DosTime);
if (headerInfoAvailable == true) {
WriteLEInt((int)entry.Crc);
if ( entry.LocalHeaderRequiresZip64 ) {
WriteLEInt(-1);
WriteLEInt(-1);
}
else {
WriteLEInt(entry.IsCrypted ? (int)entry.CompressedSize + ZipConstants.CryptoHeaderSize : (int)entry.CompressedSize);
WriteLEInt((int)entry.Size);
}
} else {
if (patchData != null) {
patchData.CrcPatchOffset = stream_.Position;
}
WriteLEInt(0); // Crc
if ( patchData != null ) {
patchData.SizePatchOffset = stream_.Position;
}
// For local header both sizes appear in Zip64 Extended Information
if ( entry.LocalHeaderRequiresZip64 && patchEntryHeader ) {
WriteLEInt(-1);
WriteLEInt(-1);
}
else {
WriteLEInt(0); // Compressed size
WriteLEInt(0); // Uncompressed size
}
}
byte[] name = ZipConstants.ConvertToArray(entry.Flags, entry.Name);
if (name.Length > 0xFFFF) {
throw new ZipException("Entry name too long.");
}
ZipExtraData ed = new ZipExtraData(entry.ExtraData);
if (entry.LocalHeaderRequiresZip64 && (headerInfoAvailable || patchEntryHeader)) {
ed.StartNewEntry();
if (headerInfoAvailable) {
ed.AddLeLong(entry.Size);
ed.AddLeLong(entry.CompressedSize);
}
else {
ed.AddLeLong(-1);
ed.AddLeLong(-1);
}
ed.AddNewEntry(1);
if ( !ed.Find(1) ) {
throw new ZipException("Internal error cant find extra data");
}
if ( patchData != null ) {
patchData.SizePatchOffset = ed.CurrentReadIndex;
}
}
else {
ed.Delete(1);
}
byte[] extra = ed.GetEntryData();
WriteLEShort(name.Length);
WriteLEShort(extra.Length);
if ( name.Length > 0 ) {
stream_.Write(name, 0, name.Length);
}
if ( entry.LocalHeaderRequiresZip64 && patchEntryHeader ) {
patchData.SizePatchOffset += stream_.Position;
}
if ( extra.Length > 0 ) {
stream_.Write(extra, 0, extra.Length);
}
}
void ExtractFileEntry(ZipEntry entry, string targetName)
{
bool proceed = true;
if ( overwrite_ != Overwrite.Always ) {
if ( File.Exists(targetName) ) {
if ( (overwrite_ == Overwrite.Prompt) && (confirmDelegate_ != null) ) {
proceed = confirmDelegate_(targetName);
}
else {
proceed = false;
}
}
}
if ( proceed ) {
if ( events_ != null ) {
continueRunning_ = events_.OnProcessFile(entry.Name);
}
if ( continueRunning_ ) {
try {
using ( FileStream outputStream = File.Create(targetName) ) {
if ( buffer_ == null ) {
buffer_ = new byte[4096];
}
if ((events_ != null) && (events_.Progress != null))
{
StreamUtils.Copy(zipFile_.GetInputStream(entry), outputStream, buffer_,
events_.Progress, events_.ProgressInterval, this, entry.Name, entry.Size);
}
else
{
StreamUtils.Copy(zipFile_.GetInputStream(entry), outputStream, buffer_);
}
if (events_ != null) {
continueRunning_ = events_.OnCompletedFile(entry.Name);
}
}
#if !NETCF_1_0 && !NETCF_2_0
if ( restoreDateTimeOnExtract_ ) {
File.SetLastWriteTime(targetName, entry.DateTime);
}
if ( RestoreAttributesOnExtract && entry.IsDOSEntry && (entry.ExternalFileAttributes != -1)) {
FileAttributes fileAttributes = (FileAttributes) entry.ExternalFileAttributes;
// TODO: FastZip - Setting of other file attributes on extraction is a little trickier.
fileAttributes &= (FileAttributes.Archive | FileAttributes.Normal | FileAttributes.ReadOnly | FileAttributes.Hidden);
File.SetAttributes(targetName, fileAttributes);
}
#endif
}
catch(Exception ex) {
if ( events_ != null ) {
continueRunning_ = events_.OnFileFailure(targetName, ex);
}
else {
continueRunning_ = false;
throw;
}
}
}
}
}
/// <summary>
/// Closes the zip input stream
/// </summary>
public override void Close()
{
internalReader = new ReadDataHandler(ReadingNotAvailable);
crc = null;
entry = null;
base.Close();
}
/// <summary>
/// Starts a new Zip entry. It automatically closes the previous
/// entry if present.
/// All entry elements bar name are optional, but must be correct if present.
/// If the compression method is stored and the output is not patchable
/// the compression for that entry is automatically changed to deflate level 0
/// </summary>
/// <param name="entry">
/// the entry.
/// </param>
/// <exception cref="System.ArgumentNullException">
/// if entry passed is null.
/// </exception>
/// <exception cref="System.IO.IOException">
/// if an I/O error occured.
/// </exception>
/// <exception cref="System.InvalidOperationException">
/// if stream was finished
/// </exception>
/// <exception cref="ZipException">
/// Too many entries in the Zip file<br/>
/// Entry name is too long<br/>
/// Finish has already been called<br/>
/// </exception>
public void PutNextEntry(ZipEntry entry)
{
if ( entry == null ) {
throw new ArgumentNullException("entry");
}
if (entries == null) {
throw new InvalidOperationException("ZipOutputStream was finished");
}
if (curEntry != null) {
CloseEntry();
}
if (entries.Count == int.MaxValue) {
throw new ZipException("Too many entries for Zip file");
}
CompressionMethod method = entry.CompressionMethod;
int compressionLevel = defaultCompressionLevel;
// Clear flags that the library manages internally
entry.Flags &= (int)GeneralBitFlags.UnicodeText;
patchEntryHeader = false;
bool headerInfoAvailable;
// No need to compress - definitely no data.
if (entry.Size == 0)
{
entry.CompressedSize = entry.Size;
entry.Crc = 0;
method = CompressionMethod.Stored;
headerInfoAvailable = true;
}
else
{
headerInfoAvailable = (entry.Size >= 0) && entry.HasCrc;
// Switch to deflation if storing isnt possible.
if (method == CompressionMethod.Stored)
{
if (!headerInfoAvailable)
{
if (!CanPatchEntries)
{
// Can't patch entries so storing is not possible.
method = CompressionMethod.Deflated;
compressionLevel = 0;
}
}
else // entry.size must be > 0
{
entry.CompressedSize = entry.Size;
headerInfoAvailable = entry.HasCrc;
}
}
}
if (headerInfoAvailable == false) {
if (CanPatchEntries == false) {
// Only way to record size and compressed size is to append a data descriptor
// after compressed data.
// Stored entries of this form have already been converted to deflating.
entry.Flags |= 8;
} else {
patchEntryHeader = true;
}
}
if (Password != null) {
entry.IsCrypted = true;
if (entry.Crc < 0) {
// Need to append a data descriptor as the crc isnt available for use
// with encryption, the date is used instead. Setting the flag
// indicates this to the decompressor.
entry.Flags |= 8;
}
}
entry.Offset = offset;
entry.CompressionMethod = (CompressionMethod)method;
curMethod = method;
sizePatchPos = -1;
if ( (useZip64_ == UseZip64.On) || ((entry.Size < 0) && (useZip64_ == UseZip64.Dynamic)) ) {
entry.ForceZip64();
}
// Write the local file header
WriteLeInt(ZipConstants.LocalHeaderSignature);
WriteLeShort(entry.Version);
WriteLeShort(entry.Flags);
WriteLeShort((byte)method);
WriteLeInt((int)entry.DosTime);
// TODO: Refactor header writing. Its done in several places.
if (headerInfoAvailable == true) {
WriteLeInt((int)entry.Crc);
if ( entry.LocalHeaderRequiresZip64 ) {
WriteLeInt(-1);
WriteLeInt(-1);
}
else {
WriteLeInt(entry.IsCrypted ? (int)entry.CompressedSize + ZipConstants.CryptoHeaderSize : (int)entry.CompressedSize);
WriteLeInt((int)entry.Size);
}
} else {
if (patchEntryHeader == true) {
crcPatchPos = baseOutputStream_.Position;
}
WriteLeInt(0); // Crc
if ( patchEntryHeader ) {
sizePatchPos = baseOutputStream_.Position;
}
// For local header both sizes appear in Zip64 Extended Information
if ( entry.LocalHeaderRequiresZip64 || patchEntryHeader ) {
WriteLeInt(-1);
WriteLeInt(-1);
}
else {
WriteLeInt(0); // Compressed size
WriteLeInt(0); // Uncompressed size
}
}
byte[] name = ZipConstants.ConvertToArray(entry.Flags, entry.Name);
if (name.Length > 0xFFFF) {
throw new ZipException("Entry name too long.");
}
ZipExtraData ed = new ZipExtraData(entry.ExtraData);
if (entry.LocalHeaderRequiresZip64) {
ed.StartNewEntry();
if (headerInfoAvailable) {
ed.AddLeLong(entry.Size);
ed.AddLeLong(entry.CompressedSize);
}
else {
ed.AddLeLong(-1);
ed.AddLeLong(-1);
}
ed.AddNewEntry(1);
if ( !ed.Find(1) ) {
throw new ZipException("Internal error cant find extra data");
}
if ( patchEntryHeader ) {
sizePatchPos = ed.CurrentReadIndex;
}
}
else {
ed.Delete(1);
}
byte[] extra = ed.GetEntryData();
WriteLeShort(name.Length);
WriteLeShort(extra.Length);
if ( name.Length > 0 ) {
baseOutputStream_.Write(name, 0, name.Length);
}
if ( entry.LocalHeaderRequiresZip64 && patchEntryHeader ) {
sizePatchPos += baseOutputStream_.Position;
}
if ( extra.Length > 0 ) {
baseOutputStream_.Write(extra, 0, extra.Length);
}
offset += ZipConstants.LocalHeaderBaseSize + name.Length + extra.Length;
// Activate the entry.
curEntry = entry;
crc.Reset();
if (method == CompressionMethod.Deflated) {
deflater_.Reset();
deflater_.SetLevel(compressionLevel);
}
size = 0;
if (entry.IsCrypted == true) {
if (entry.Crc < 0) { // so testing Zip will says its ok
WriteEncryptionHeader(entry.DosTime << 16);
} else {
WriteEncryptionHeader(entry.Crc);
}
}
}
/// <summary>
/// Make a new <see cref="ZipEntry"/> from a name.
/// </summary>
/// <param name="fileName">The name of the file to create a new entry for.</param>
/// <param name="useFileSystem">If true entry detail is retrieved from the file system if the file exists.</param>
/// <returns>Returns a new <see cref="ZipEntry"/> based on the <paramref name="fileName"/>.</returns>
public ZipEntry MakeFileEntry(string fileName, bool useFileSystem)
{
ZipEntry result = new ZipEntry(nameTransform_.TransformFile(fileName));
result.IsUnicodeText = isUnicodeText_;
int externalAttributes = 0;
bool useAttributes = (setAttributes_ != 0);
FileInfo fi = null;
if (useFileSystem)
{
fi = new FileInfo(fileName);
}
if ((fi != null) && fi.Exists)
{
switch (timeSetting_)
{
case TimeSetting.CreateTime:
result.DateTime = fi.CreationTime;
break;
case TimeSetting.CreateTimeUtc:
#if NETCF_1_0 || NETCF_2_0
result.DateTime = fi.CreationTime.ToUniversalTime();
#else
result.DateTime = fi.CreationTimeUtc;
#endif
break;
case TimeSetting.LastAccessTime:
result.DateTime = fi.LastAccessTime;
break;
case TimeSetting.LastAccessTimeUtc:
#if NETCF_1_0 || NETCF_2_0
result.DateTime = fi.LastAccessTime.ToUniversalTime();
#else
result.DateTime = fi.LastAccessTimeUtc;
#endif
break;
case TimeSetting.LastWriteTime:
result.DateTime = fi.LastWriteTime;
break;
case TimeSetting.LastWriteTimeUtc:
#if NETCF_1_0 || NETCF_2_0
result.DateTime = fi.LastWriteTime.ToUniversalTime();
#else
result.DateTime = fi.LastWriteTimeUtc;
#endif
break;
case TimeSetting.Fixed:
result.DateTime = fixedDateTime_;
break;
default:
throw new ZipException("Unhandled time setting in MakeFileEntry");
}
result.Size = fi.Length;
useAttributes = true;
externalAttributes = ((int)fi.Attributes & getAttributes_);
}
else
{
if (timeSetting_ == TimeSetting.Fixed)
{
result.DateTime = fixedDateTime_;
}
}
if (useAttributes)
{
externalAttributes |= setAttributes_;
result.ExternalFileAttributes = externalAttributes;
}
return result;
}
public ZipUpdate(IStaticDataSource dataSource, string entryName, CompressionMethod compressionMethod)
{
command_ = UpdateCommand.Add;
entry_ = new ZipEntry(entryName);
entry_.CompressionMethod = compressionMethod;
dataSource_ = dataSource;
}
public ZipUpdate(IStaticDataSource dataSource, ZipEntry entry)
{
command_ = UpdateCommand.Add;
entry_ = entry;
dataSource_ = dataSource;
}
public ZipUpdate(string fileName, ZipEntry entry)
{
command_ = UpdateCommand.Add;
entry_ = entry;
filename_ = fileName;
}
public ZipUpdate(string fileName, string entryName, CompressionMethod compressionMethod)
{
command_ = UpdateCommand.Add;
entry_ = new ZipEntry(entryName);
entry_.CompressionMethod = compressionMethod;
filename_ = fileName;
}
public ZipEntryEnumerator(ZipEntry[] entries)
{
array = entries;
}
int WriteCentralDirectoryHeader(ZipEntry entry)
{
if ( entry.CompressedSize < 0 ) {
throw new ZipException("Attempt to write central directory entry with unknown csize");
}
if ( entry.Size < 0 ) {
throw new ZipException("Attempt to write central directory entry with unknown size");
}
if ( entry.Crc < 0 ) {
throw new ZipException("Attempt to write central directory entry with unknown crc");
}
// Write the central file header
WriteLEInt(ZipConstants.CentralHeaderSignature);
// Version made by
WriteLEShort(ZipConstants.VersionMadeBy);
// Version required to extract
WriteLEShort(entry.Version);
WriteLEShort(entry.Flags);
unchecked {
WriteLEShort((byte)entry.CompressionMethod);
WriteLEInt((int)entry.DosTime);
WriteLEInt((int)entry.Crc);
}
if ( (entry.IsZip64Forced()) || (entry.CompressedSize >= 0xffffffff) ) {
WriteLEInt(-1);
}
else {
WriteLEInt((int)(entry.CompressedSize & 0xffffffff));
}
if ( (entry.IsZip64Forced()) || (entry.Size >= 0xffffffff) ) {
WriteLEInt(-1);
}
else {
WriteLEInt((int)entry.Size);
}
byte[] name = ZipConstants.ConvertToArray(entry.Flags, entry.Name);
if ( name.Length > 0xFFFF ) {
throw new ZipException("Entry name is too long.");
}
WriteLEShort(name.Length);
// Central header extra data is different to local header version so regenerate.
ZipExtraData ed = new ZipExtraData(entry.ExtraData);
if ( entry.CentralHeaderRequiresZip64 ) {
ed.StartNewEntry();
if ( (entry.Size >= 0xffffffff) || (useZip64_ == UseZip64.On) )
{
ed.AddLeLong(entry.Size);
}
if ( (entry.CompressedSize >= 0xffffffff) || (useZip64_ == UseZip64.On) )
{
ed.AddLeLong(entry.CompressedSize);
}
if ( entry.Offset >= 0xffffffff ) {
ed.AddLeLong(entry.Offset);
}
// Number of disk on which this file starts isnt supported and is never written here.
ed.AddNewEntry(1);
}
else {
// Should have already be done when local header was added.
ed.Delete(1);
}
byte[] centralExtraData = ed.GetEntryData();
WriteLEShort(centralExtraData.Length);
WriteLEShort(entry.Comment != null ? entry.Comment.Length : 0);
WriteLEShort(0); // disk number
WriteLEShort(0); // internal file attributes
// External file attributes...
if ( entry.ExternalFileAttributes != -1 ) {
WriteLEInt(entry.ExternalFileAttributes);
}
else {
if ( entry.IsDirectory ) {
WriteLEUint(16);
}
else {
WriteLEUint(0);
}
}
if ( entry.Offset >= 0xffffffff ) {
WriteLEUint(0xffffffff);
}
else {
WriteLEUint((uint)(int)entry.Offset);
}
if ( name.Length > 0 ) {
baseStream_.Write(name, 0, name.Length);
}
if ( centralExtraData.Length > 0 ) {
baseStream_.Write(centralExtraData, 0, centralExtraData.Length);
}
byte[] rawComment = (entry.Comment != null) ? Encoding.ASCII.GetBytes(entry.Comment) : new byte[0];
if ( rawComment.Length > 0 ) {
baseStream_.Write(rawComment, 0, rawComment.Length);
}
return ZipConstants.CentralHeaderBaseSize + name.Length + centralExtraData.Length + rawComment.Length;
}
/// <summary>
/// Test a local header against that provided from the central directory
/// </summary>
/// <param name="entry">
/// The entry to test against
/// </param>
/// <param name="tests">The type of <see cref="HeaderTest">tests</see> to carry out.</param>
/// <returns>The offset of the entries data in the file</returns>
long TestLocalHeader(ZipEntry entry, HeaderTest tests)
{
lock(baseStream_)
{
bool testHeader = (tests & HeaderTest.Header) != 0;
bool testData = (tests & HeaderTest.Extract) != 0;
baseStream_.Seek(offsetOfFirstEntry + entry.Offset, SeekOrigin.Begin);
if ((int)ReadLEUint() != ZipConstants.LocalHeaderSignature) {
throw new ZipException(string.Format("Wrong local header signature @{0:X}", offsetOfFirstEntry + entry.Offset));
}
short extractVersion = ( short )ReadLEUshort();
short localFlags = ( short )ReadLEUshort();
short compressionMethod = ( short )ReadLEUshort();
short fileTime = ( short )ReadLEUshort();
short fileDate = ( short )ReadLEUshort();
uint crcValue = ReadLEUint();
long compressedSize = ReadLEUint();
long size = ReadLEUint();
int storedNameLength = ReadLEUshort();
int extraDataLength = ReadLEUshort();
byte[] nameData = new byte[storedNameLength];
StreamUtils.ReadFully(baseStream_, nameData);
byte[] extraData = new byte[extraDataLength];
StreamUtils.ReadFully(baseStream_, extraData);
ZipExtraData localExtraData = new ZipExtraData(extraData);
// Extra data / zip64 checks
if (localExtraData.Find(1))
{
// TODO Check for tag values being distinct.. Multiple zip64 tags means what?
// Zip64 extra data but 'extract version' is too low
if (extractVersion < ZipConstants.VersionZip64)
{
throw new ZipException(
string.Format("Extra data contains Zip64 information but version {0}.{1} is not high enough",
extractVersion / 10, extractVersion % 10));
}
// Zip64 extra data but size fields dont indicate its required.
if (((uint)size != uint.MaxValue) && ((uint)compressedSize != uint.MaxValue))
{
throw new ZipException("Entry sizes not correct for Zip64");
}
size = localExtraData.ReadLong();
compressedSize = localExtraData.ReadLong();
if ((localFlags & (int)GeneralBitFlags.Descriptor) != 0)
{
// These may be valid if patched later
if ( (size != -1) && (size != entry.Size)) {
throw new ZipException("Size invalid for descriptor");
}
if ((compressedSize != -1) && (compressedSize != entry.CompressedSize)) {
throw new ZipException("Compressed size invalid for descriptor");
}
}
}
else
{
// No zip64 extra data but entry requires it.
if ((extractVersion >= ZipConstants.VersionZip64) &&
(((uint)size == uint.MaxValue) || ((uint)compressedSize == uint.MaxValue)))
{
throw new ZipException("Required Zip64 extended information missing");
}
}
if ( testData ) {
if ( entry.IsFile ) {
if ( !entry.IsCompressionMethodSupported() ) {
throw new ZipException("Compression method not supported");
}
if ( (extractVersion > ZipConstants.VersionMadeBy)
|| ((extractVersion > 20) && (extractVersion < ZipConstants.VersionZip64)) ) {
throw new ZipException(string.Format("Version required to extract this entry not supported ({0})", extractVersion));
}
if ( (localFlags & ( int )(GeneralBitFlags.Patched | GeneralBitFlags.StrongEncryption | GeneralBitFlags.EnhancedCompress | GeneralBitFlags.HeaderMasked)) != 0 ) {
throw new ZipException("The library does not support the zip version required to extract this entry");
}
}
}
if (testHeader)
{
if ((extractVersion <= 63) && // Ignore later versions as we dont know about them..
(extractVersion != 10) &&
(extractVersion != 11) &&
(extractVersion != 20) &&
(extractVersion != 21) &&
(extractVersion != 25) &&
(extractVersion != 27) &&
(extractVersion != 45) &&
(extractVersion != 46) &&
(extractVersion != 50) &&
(extractVersion != 51) &&
(extractVersion != 52) &&
(extractVersion != 61) &&
(extractVersion != 62) &&
(extractVersion != 63)
)
{
throw new ZipException(string.Format("Version required to extract this entry is invalid ({0})", extractVersion));
}
// Local entry flags dont have reserved bit set on.
if ((localFlags & (int)(GeneralBitFlags.ReservedPKware4 | GeneralBitFlags.ReservedPkware14 | GeneralBitFlags.ReservedPkware15)) != 0)
{
throw new ZipException("Reserved bit flags cannot be set.");
}
// Encryption requires extract version >= 20
if (((localFlags & (int)GeneralBitFlags.Encrypted) != 0) && (extractVersion < 20))
{
throw new ZipException(string.Format("Version required to extract this entry is too low for encryption ({0})", extractVersion));
}
// Strong encryption requires encryption flag to be set and extract version >= 50.
if ((localFlags & (int)GeneralBitFlags.StrongEncryption) != 0)
{
if ((localFlags & (int)GeneralBitFlags.Encrypted) == 0)
{
throw new ZipException("Strong encryption flag set but encryption flag is not set");
}
if (extractVersion < 50)
{
throw new ZipException(string.Format("Version required to extract this entry is too low for encryption ({0})", extractVersion));
}
}
// Patched entries require extract version >= 27
if (((localFlags & (int)GeneralBitFlags.Patched) != 0) && (extractVersion < 27))
{
throw new ZipException(string.Format("Patched data requires higher version than ({0})", extractVersion));
}
// Central header flags match local entry flags.
if (localFlags != entry.Flags)
{
throw new ZipException("Central header/local header flags mismatch");
}
// Central header compression method matches local entry
if (entry.CompressionMethod != (CompressionMethod)compressionMethod)
{
throw new ZipException("Central header/local header compression method mismatch");
}
if (entry.Version != extractVersion)
{
throw new ZipException("Extract version mismatch");
}
// Strong encryption and extract version match
if ((localFlags & (int)GeneralBitFlags.StrongEncryption) != 0)
{
if (extractVersion < 62)
{
throw new ZipException("Strong encryption flag set but version not high enough");
}
}
if ((localFlags & (int)GeneralBitFlags.HeaderMasked) != 0)
{
if ((fileTime != 0) || (fileDate != 0))
{
throw new ZipException("Header masked set but date/time values non-zero");
}
}
if ((localFlags & (int)GeneralBitFlags.Descriptor) == 0)
{
if (crcValue != (uint)entry.Crc)
{
throw new ZipException("Central header/local header crc mismatch");
}
}
// Crc valid for empty entry.
// This will also apply to streamed entries where size isnt known and the header cant be patched
if ((size == 0) && (compressedSize == 0))
{
if (crcValue != 0)
{
throw new ZipException("Invalid CRC for empty entry");
}
}
// TODO: make test more correct... can't compare lengths as was done originally as this can fail for MBCS strings
// Assuming a code page at this point is not valid? Best is to store the name length in the ZipEntry probably
if (entry.Name.Length > storedNameLength)
{
throw new ZipException("File name length mismatch");
}
// Name data has already been read convert it and compare.
string localName = ZipConstants.ConvertToStringExt(localFlags, nameData);
// Central directory and local entry name match
if (localName != entry.Name)
{
throw new ZipException("Central header and local header file name mismatch");
}
// Directories have zero actual size but can have compressed size
if (entry.IsDirectory)
{
if (size > 0)
{
throw new ZipException("Directory cannot have size");
}
// There may be other cases where the compressed size can be greater than this?
// If so until details are known we will be strict.
if (entry.IsCrypted)
{
if (compressedSize > ZipConstants.CryptoHeaderSize + 2)
{
throw new ZipException("Directory compressed size invalid");
}
}
else if (compressedSize > 2)
{
// When not compressed the directory size can validly be 2 bytes
// if the true size wasnt known when data was originally being written.
// NOTE: Versions of the library 0.85.4 and earlier always added 2 bytes
throw new ZipException("Directory compressed size invalid");
}
}
if (!ZipNameTransform.IsValidName(localName, true))
{
throw new ZipException("Name is invalid");
}
}
// Tests that apply to both data and header.
// Size can be verified only if it is known in the local header.
// it will always be known in the central header.
if (((localFlags & (int)GeneralBitFlags.Descriptor) == 0) ||
((size > 0) || (compressedSize > 0))) {
if (size != entry.Size) {
throw new ZipException(
string.Format("Size mismatch between central header({0}) and local header({1})",
entry.Size, size));
}
if (compressedSize != entry.CompressedSize) {
throw new ZipException(
string.Format("Compressed size mismatch between central header({0}) and local header({1})",
entry.CompressedSize, compressedSize));
}
}
int extraLength = storedNameLength + extraDataLength;
return offsetOfFirstEntry + entry.Offset + ZipConstants.LocalHeaderBaseSize + extraLength;
}
}
internal void SetEntry(ZipEntry entry)
{
entry_ = entry;
entryValid_ = true;
bytesTested_ = 0;
}
public ZipUpdate(ZipEntry original, ZipEntry updated)
{
throw new ZipException("Modify not currently supported");
/*
command_ = UpdateCommand.Modify;
entry_ = ( ZipEntry )original.Clone();
outEntry_ = ( ZipEntry )updated.Clone();
*/
}
/// <summary>
/// Closes the current entry, updating header and footer information as required
/// </summary>
/// <exception cref="System.IO.IOException">
/// An I/O error occurs.
/// </exception>
/// <exception cref="System.InvalidOperationException">
/// No entry is active.
/// </exception>
public void CloseEntry()
{
if (curEntry == null) {
throw new InvalidOperationException("No open entry");
}
long csize = size;
// First finish the deflater, if appropriate
if (curMethod == CompressionMethod.Deflated) {
if (size > 0) {
base.Finish();
csize = deflater_.TotalOut;
}
else {
deflater_.Reset();
}
}
if (curEntry.Size < 0) {
curEntry.Size = size;
} else if (curEntry.Size != size) {
throw new ZipException("size was " + size + ", but I expected " + curEntry.Size);
}
if (curEntry.CompressedSize < 0) {
curEntry.CompressedSize = csize;
} else if (curEntry.CompressedSize != csize) {
throw new ZipException("compressed size was " + csize + ", but I expected " + curEntry.CompressedSize);
}
if (curEntry.Crc < 0) {
curEntry.Crc = crc.Value;
} else if (curEntry.Crc != crc.Value) {
throw new ZipException("crc was " + crc.Value + ", but I expected " + curEntry.Crc);
}
offset += csize;
if (curEntry.IsCrypted == true) {
curEntry.CompressedSize += ZipConstants.CryptoHeaderSize;
}
// Patch the header if possible
if (patchEntryHeader == true) {
patchEntryHeader = false;
long curPos = baseOutputStream_.Position;
baseOutputStream_.Seek(crcPatchPos, SeekOrigin.Begin);
WriteLeInt((int)curEntry.Crc);
if ( curEntry.LocalHeaderRequiresZip64 ) {
if ( sizePatchPos == -1 ) {
throw new ZipException("Entry requires zip64 but this has been turned off");
}
baseOutputStream_.Seek(sizePatchPos, SeekOrigin.Begin);
WriteLeLong(curEntry.Size);
WriteLeLong(curEntry.CompressedSize);
}
else {
WriteLeInt((int)curEntry.CompressedSize);
WriteLeInt((int)curEntry.Size);
}
baseOutputStream_.Seek(curPos, SeekOrigin.Begin);
}
// Add data descriptor if flagged as required
if ((curEntry.Flags & 8) != 0) {
WriteLeInt(ZipConstants.DataDescriptorSignature);
WriteLeInt(unchecked((int)curEntry.Crc));
if ( curEntry.LocalHeaderRequiresZip64 ) {
WriteLeLong(curEntry.CompressedSize);
WriteLeLong(curEntry.Size);
offset += ZipConstants.Zip64DataDescriptorSize;
}
else {
WriteLeInt((int)curEntry.CompressedSize);
WriteLeInt((int)curEntry.Size);
offset += ZipConstants.DataDescriptorSize;
}
}
entries.Add(curEntry);
curEntry = null;
}
public ZipUpdate(UpdateCommand command, ZipEntry entry)
{
command_ = command;
entry_ = ( ZipEntry )entry.Clone();
}
/// <summary>
/// Make a new <see cref="ZipEntry"></see> for a directory.
/// </summary>
/// <param name="directoryName">The raw untransformed name for the new directory</param>
/// <param name="useFileSystem">If true entry detail is retrieved from the file system if the file exists.</param>
/// <returns>Returns a new <see cref="ZipEntry"></see> representing a directory.</returns>
public ZipEntry MakeDirectoryEntry(string directoryName, bool useFileSystem)
{
ZipEntry result = new ZipEntry(nameTransform_.TransformDirectory(directoryName));
result.Size=0;
int externalAttributes = 0;
DirectoryInfo di = null;
if (useFileSystem)
{
di = new DirectoryInfo(directoryName);
}
if ((di != null) && di.Exists)
{
switch (timeSetting_)
{
case TimeSetting.CreateTime:
result.DateTime = di.CreationTime;
break;
case TimeSetting.CreateTimeUtc:
#if NETCF_1_0 || NETCF_2_0
result.DateTime = di.CreationTime.ToUniversalTime();
#else
result.DateTime = di.CreationTimeUtc;
#endif
break;
case TimeSetting.LastAccessTime:
result.DateTime = di.LastAccessTime;
break;
case TimeSetting.LastAccessTimeUtc:
#if NETCF_1_0 || NETCF_2_0
result.DateTime = di.LastAccessTime.ToUniversalTime();
#else
result.DateTime = di.LastAccessTimeUtc;
#endif
break;
case TimeSetting.LastWriteTime:
result.DateTime = di.LastWriteTime;
break;
case TimeSetting.LastWriteTimeUtc:
#if NETCF_1_0 || NETCF_2_0
result.DateTime = di.LastWriteTime.ToUniversalTime();
#else
result.DateTime = di.LastWriteTimeUtc;
#endif
break;
case TimeSetting.Fixed:
result.DateTime = fixedDateTime_;
break;
default:
throw new ZipException("Unhandled time setting in MakeDirectoryEntry");
}
externalAttributes = ((int)di.Attributes & getAttributes_);
}
else
{
if (timeSetting_ == TimeSetting.Fixed)
{
result.DateTime = fixedDateTime_;
}
}
// Always set directory attribute on.
externalAttributes |= (setAttributes_ | 16);
result.ExternalFileAttributes = externalAttributes;
return result;
}
/// <summary>
/// Copy an existing entry.
/// </summary>
/// <param name="entry">The existing entry to copy.</param>
public ZipUpdate(ZipEntry entry)
: this(UpdateCommand.Copy, entry)
{
// Do nothing.
}
void ExtractEntry(ZipEntry entry)
{
bool doExtraction = entry.IsCompressionMethodSupported();
string targetName = entry.Name;
if ( doExtraction ) {
if ( entry.IsFile ) {
targetName = extractNameTransform_.TransformFile(targetName);
}
else if ( entry.IsDirectory ) {
targetName = extractNameTransform_.TransformDirectory(targetName);
}
doExtraction = !((targetName == null) || (targetName.Length == 0));
}
// TODO: Fire delegate/throw exception were compression method not supported, or name is invalid?
string dirName = null;
if ( doExtraction ) {
if ( entry.IsDirectory ) {
dirName = targetName;
}
else {
dirName = Path.GetDirectoryName(Path.GetFullPath(targetName));
}
}
if ( doExtraction && !Directory.Exists(dirName) ) {
if ( !entry.IsDirectory || CreateEmptyDirectories ) {
try {
Directory.CreateDirectory(dirName);
}
catch (Exception ex) {
doExtraction = false;
if ( events_ != null ) {
if ( entry.IsDirectory ) {
continueRunning_ = events_.OnDirectoryFailure(targetName, ex);
}
else {
continueRunning_ = events_.OnFileFailure(targetName, ex);
}
}
else {
continueRunning_ = false;
throw;
}
}
}
}
if ( doExtraction && entry.IsFile ) {
ExtractFileEntry(entry, targetName);
}
}
// TBD: Direct form of updating
//
// public void Update(IEntryMatcher deleteMatcher)
// {
// }
//
// public void Update(IScanner addScanner)
// {
// }
/* Modify not yet ready for public consumption.
Direct modification of an entry should not overwrite original data before its read.
Safe mode is trivial in this sense.
public void Modify(ZipEntry original, ZipEntry updated)
{
if ( original == null ) {
throw new ArgumentNullException("original");
}
if ( updated == null ) {
throw new ArgumentNullException("updated");
}
CheckUpdating();
contentsEdited_ = true;
updates_.Add(new ZipUpdate(original, updated));
}
*/
#endregion Other
#if !NETCF_1_0
static void CheckClassicPassword(CryptoStream classicCryptoStream, ZipEntry entry)
{
byte[] cryptbuffer = new byte[ZipConstants.CryptoHeaderSize];
StreamUtils.ReadFully(classicCryptoStream, cryptbuffer);
if (cryptbuffer[ZipConstants.CryptoHeaderSize - 1] != entry.CryptoCheckValue) {
throw new ZipException("Invalid password");
}
}
public ZipEntry(ZipEntry entry)
{
if ( entry == null ) {
throw new ArgumentNullException("entry");
}
known = entry.known;
name = entry.name;
size = entry.size;
compressedSize = entry.compressedSize;
crc = entry.crc;
dosTime = entry.dosTime;
method = entry.method;
comment = entry.comment;
versionToExtract = entry.versionToExtract;
versionMadeBy = entry.versionMadeBy;
externalFileAttributes = entry.externalFileAttributes;
flags = entry.flags;
zipFileIndex = entry.zipFileIndex;
offset = entry.offset;
forceZip64_ = entry.forceZip64_;
if ( entry.extra != null ) {
extra = new byte[entry.extra.Length];
Array.Copy(entry.extra, 0, extra, 0, entry.extra.Length);
}
}
Stream CreateAndInitDecryptionStream(Stream baseStream, ZipEntry entry)
{
CryptoStream result = null;
if ( (entry.Version < ZipConstants.VersionStrongEncryption)
|| (entry.Flags & (int)GeneralBitFlags.StrongEncryption) == 0) {
PkzipClassicManaged classicManaged = new PkzipClassicManaged();
OnKeysRequired(entry.Name);
if (HaveKeys == false) {
throw new ZipException("No password available for encrypted stream");
}
result = new CryptoStream(baseStream, classicManaged.CreateDecryptor(key, null), CryptoStreamMode.Read);
CheckClassicPassword(result, entry);
}
else {
throw new ZipException("Decryption method not supported");
}
return result;
}
/// <summary>
/// Advances to the next entry in the archive
/// </summary>
/// <returns>
/// The next <see cref="ZipEntry">entry</see> in the archive or null if there are no more entries.
/// </returns>
/// <remarks>
/// If the previous entry is still open <see cref="CloseEntry">CloseEntry</see> is called.
/// </remarks>
/// <exception cref="InvalidOperationException">
/// Input stream is closed
/// </exception>
/// <exception cref="ZipException">
/// Password is not set, password is invalid, compression method is invalid,
/// version required to extract is not supported
/// </exception>
public ZipEntry GetNextEntry()
{
if (crc == null) {
throw new InvalidOperationException("Closed.");
}
if (entry != null) {
CloseEntry();
}
int header = inputBuffer.ReadLeInt();
if (header == ZipConstants.CentralHeaderSignature ||
header == ZipConstants.EndOfCentralDirectorySignature ||
header == ZipConstants.CentralHeaderDigitalSignature ||
header == ZipConstants.ArchiveExtraDataSignature ||
header == ZipConstants.Zip64CentralFileHeaderSignature) {
// No more individual entries exist
Close();
return null;
}
// -jr- 07-Dec-2003 Ignore spanning temporary signatures if found
// Spanning signature is same as descriptor signature and is untested as yet.
if ( (header == ZipConstants.SpanningTempSignature) || (header == ZipConstants.SpanningSignature) ) {
header = inputBuffer.ReadLeInt();
}
if (header != ZipConstants.LocalHeaderSignature) {
throw new ZipException("Wrong Local header signature: 0x" + String.Format("{0:X}", header));
}
short versionRequiredToExtract = (short)inputBuffer.ReadLeShort();
flags = inputBuffer.ReadLeShort();
method = inputBuffer.ReadLeShort();
uint dostime = (uint)inputBuffer.ReadLeInt();
int crc2 = inputBuffer.ReadLeInt();
csize = inputBuffer.ReadLeInt();
size = inputBuffer.ReadLeInt();
int nameLen = inputBuffer.ReadLeShort();
int extraLen = inputBuffer.ReadLeShort();
bool isCrypted = (flags & 1) == 1;
byte[] buffer = new byte[nameLen];
inputBuffer.ReadRawBuffer(buffer);
string name = ZipConstants.ConvertToStringExt(flags, buffer);
entry = new ZipEntry(name, versionRequiredToExtract);
entry.Flags = flags;
entry.CompressionMethod = (CompressionMethod)method;
if ((flags & 8) == 0) {
entry.Crc = crc2 & 0xFFFFFFFFL;
entry.Size = size & 0xFFFFFFFFL;
entry.CompressedSize = csize & 0xFFFFFFFFL;
entry.CryptoCheckValue = (byte)((crc2 >> 24) & 0xff);
} else {
// This allows for GNU, WinZip and possibly other archives, the PKZIP spec
// says these values are zero under these circumstances.
if (crc2 != 0) {
entry.Crc = crc2 & 0xFFFFFFFFL;
}
if (size != 0) {
entry.Size = size & 0xFFFFFFFFL;
}
if (csize != 0) {
entry.CompressedSize = csize & 0xFFFFFFFFL;
}
entry.CryptoCheckValue = (byte)((dostime >> 8) & 0xff);
}
entry.DosTime = dostime;
// If local header requires Zip64 is true then the extended header should contain
// both values.
// Handle extra data if present. This can set/alter some fields of the entry.
if (extraLen > 0) {
byte[] extra = new byte[extraLen];
inputBuffer.ReadRawBuffer(extra);
entry.ExtraData = extra;
}
entry.ProcessExtraData(true);
if ( entry.CompressedSize >= 0 ) {
csize = entry.CompressedSize;
}
if ( entry.Size >= 0 ) {
size = entry.Size;
}
if (method == (int)CompressionMethod.Stored && (!isCrypted && csize != size || (isCrypted && csize - ZipConstants.CryptoHeaderSize != size))) {
throw new ZipException("Stored, but compressed != uncompressed");
}
// Determine how to handle reading of data if this is attempted.
if (entry.IsCompressionMethodSupported()) {
internalReader = new ReadDataHandler(InitialRead);
} else {
internalReader = new ReadDataHandler(ReadingNotSupported);
}
return entry;
}
Stream CreateAndInitEncryptionStream(Stream baseStream, ZipEntry entry)
{
CryptoStream result = null;
if ( (entry.Version < ZipConstants.VersionStrongEncryption)
|| (entry.Flags & (int)GeneralBitFlags.StrongEncryption) == 0) {
PkzipClassicManaged classicManaged = new PkzipClassicManaged();
OnKeysRequired(entry.Name);
if (HaveKeys == false) {
throw new ZipException("No password available for encrypted stream");
}
// Closing a CryptoStream will close the base stream as well so wrap it in an UncompressedStream
// which doesnt do this.
result = new CryptoStream(new UncompressedStream(baseStream),
classicManaged.CreateEncryptor(key, null), CryptoStreamMode.Write);
if ( (entry.Crc < 0) || (entry.Flags & 8) != 0) {
WriteEncryptionHeader(result, entry.DosTime << 16);
}
else {
WriteEncryptionHeader(result, entry.Crc);
}
}
return result;
}
/// <summary>
/// Write a data descriptor.
/// </summary>
/// <param name="entry">The entry to write a descriptor for.</param>
/// <returns>Returns the number of descriptor bytes written.</returns>
public int WriteDataDescriptor(ZipEntry entry)
{
if (entry == null) {
throw new ArgumentNullException("entry");
}
int result=0;
// Add data descriptor if flagged as required
if ((entry.Flags & (int)GeneralBitFlags.Descriptor) != 0)
{
// The signature is not PKZIP originally but is now described as optional
// in the PKZIP Appnote documenting trhe format.
WriteLEInt(ZipConstants.DataDescriptorSignature);
WriteLEInt(unchecked((int)(entry.Crc)));
result+=8;
if (entry.LocalHeaderRequiresZip64)
{
WriteLELong(entry.CompressedSize);
WriteLELong(entry.Size);
result+=16;
}
else
{
WriteLEInt((int)entry.CompressedSize);
WriteLEInt((int)entry.Size);
result+=8;
}
}
return result;
}
/// <summary>
/// Get a <see cref="Stream"/> providing data for an entry.
/// </summary>
/// <param name="entry">The entry to provide data for.</param>
/// <param name="name">The file name for data if known.</param>
/// <returns>Returns a stream providing data; or null if not available</returns>
public Stream GetSource(ZipEntry entry, string name)
{
Stream result = null;
if ( name != null ) {
result = File.OpenRead(name);
}
return result;
}
void cmTree_GenerateThreadArchive_Click(object sender, EventArgs e)
{
if (this.treePostWindowMouseAt == null) return;
__UpdateStatusText ust = new __UpdateStatusText(this.UpdateStatusText);
Thread t = this._nodeToThread(this.treePostWindowMouseAt);
if (t == null || t.Count == 0) return;
// Gather filenames.
List<string> l = new List<string>();
string[] filenames;
foreach(Post p in t)
if(!p.ImagePath.Contains("http:"))
l.Add(p.ImagePath);
filenames = new string[l.Count];
l.CopyTo(filenames);
DebugConsole.ShowInfo("Creating archive from " + filenames.Length + " files.");
// Prompt for filename.
SaveFileDialog fd = new SaveFileDialog();
string filename = Path.GetDirectoryName(this._db.Filename) + @"\" + t.Id + ".zip";
fd.AddExtension = true;
fd.CheckPathExists = true;
fd.DefaultExt = ".zip";
fd.Filter = "ZIP Archives (*.zip)|*.zip|All files (*.*)|*.*";
fd.FilterIndex = 0;
fd.InitialDirectory = Path.GetDirectoryName(this._db.Filename);
fd.OverwritePrompt = true;
fd.RestoreDirectory = true;
fd.Title = "Save Thread Archive";
fd.FileName = t.Id + ".zip";
if (fd.ShowDialog() == DialogResult.OK)
filename = fd.FileName;
// Epic totally thread-safe way to do stuff.
string current = "";
SysThread st = new SysThread(new ThreadStart(delegate()
{
try
{
using (ZipOutputStream s = new ZipOutputStream(File.Create(filename)))
{
s.SetLevel(9);
byte[] buffer = new byte[4096];
foreach (string file in filenames)
{
current = file;
ZipEntry entry = new ZipEntry(Path.GetFileName(file));
entry.DateTime = new FileInfo(file).LastWriteTime;
s.PutNextEntry(entry);
using (FileStream fs = File.OpenRead(file))
{
int sourceBytes;
do
{
sourceBytes = fs.Read(buffer, 0, buffer.Length);
s.Write(buffer, 0, sourceBytes);
} while (sourceBytes > 0);
}
s.CloseEntry();
DebugConsole.ShowDebug("Added " + file + " to archive, original/compressed " + entry.Size + "/" + entry.CompressedSize);
}
}
}
catch (Exception ex)
{
Program._genericMessageBox("Error creating archive: " + ex.Message, MessageBoxIcon.Error);
}
}));
st.Start();
if (this._updatingStatus) return;
try
{
this._updatingStatus = true;
while (st.IsAlive)
{
this.Invoke(ust, "Archiving: \"" + current + "\".");
Application.DoEvents();
SysThread.Sleep(50);
}
this.Invoke(ust, "Ready.");
}
finally { this._updatingStatus = false; }
System.Diagnostics.Process.Start("explorer.exe", "/select," + filename);
}
/// <summary>
/// Locate the data for a given entry.
/// </summary>
/// <returns>
/// The start offset of the data.
/// </returns>
/// <exception cref="System.IO.EndOfStreamException">
/// The stream ends prematurely
/// </exception>
/// <exception cref="ICSharpCode.SharpZipLib.Zip.ZipException">
/// The local header signature is invalid, the entry and central header file name lengths are different
/// or the local and entry compression methods dont match
/// </exception>
long LocateEntry(ZipEntry entry)
{
return TestLocalHeader(entry, HeaderTest.Extract);
}