Example #1
0
		/// <summary>
		/// Finishes the stream.  This will write the central directory at the
		/// end of the zip file and flush the stream.
		/// </summary>
		/// <remarks>
		/// This is automatically called when the stream is closed.
		/// </remarks>
		/// <exception cref="System.IO.IOException">
		/// An I/O error occurs.
		/// </exception>
		/// <exception cref="ZipException">
		/// Comment exceeds the maximum length<br/>
		/// Entry name exceeds the maximum length
		/// </exception>
		public override void Finish()
		{
			if (entries == null)  {
				return;
			}
			
			if (curEntry != null) {
				CloseEntry();
			}
			
			int numEntries = 0;
			int sizeEntries = 0;
			
			foreach (ZipEntry entry in entries) {
				CompressionMethod method = entry.CompressionMethod;
				WriteLeInt(ZipConstants.CENSIG); 
				WriteLeShort(ZipConstants.VERSION_MADE_BY);
				WriteLeShort(entry.Version);
				WriteLeShort(entry.Flags);
				WriteLeShort((short)method);
				WriteLeInt((int)entry.DosTime);
				WriteLeInt((int)entry.Crc);
				WriteLeInt((int)entry.CompressedSize);
				WriteLeInt((int)entry.Size);
				
				byte[] name = ZipConstants.ConvertToArray(entry.Name);
				
				if (name.Length > 0xffff) {
					throw new ZipException("Name too long.");
				}
				
				byte[] extra = entry.ExtraData;
				if (extra == null) {
					extra = new byte[0];
				}
				
				byte[] entryComment = entry.Comment != null ? ZipConstants.ConvertToArray(entry.Comment) : new byte[0];
				if (entryComment.Length > 0xffff) {
					throw new ZipException("Comment too long.");
				}
				
				WriteLeShort(name.Length);
				WriteLeShort(extra.Length);
				WriteLeShort(entryComment.Length);
				WriteLeShort(0);	// disk number
				WriteLeShort(0);	// internal file attr
									// external file attribute

				if (entry.ExternalFileAttributes != -1) {
					WriteLeInt(entry.ExternalFileAttributes);
				} else {
					if (entry.IsDirectory) {                         // mark entry as directory (from nikolam.AT.perfectinfo.com)
						WriteLeInt(16);
					} else {
						WriteLeInt(0);
					}
				}

				WriteLeInt(entry.Offset);
				
				baseOutputStream.Write(name,    0, name.Length);
				baseOutputStream.Write(extra,   0, extra.Length);
				baseOutputStream.Write(entryComment, 0, entryComment.Length);
				++numEntries;
				sizeEntries += ZipConstants.CENHDR + name.Length + extra.Length + entryComment.Length;
			}
			
			WriteLeInt(ZipConstants.ENDSIG);
			WriteLeShort(0);                    // number of this disk
			WriteLeShort(0);                    // no of disk with start of central dir
			WriteLeShort(numEntries);           // entries in central dir for this disk
			WriteLeShort(numEntries);           // total entries in central directory
			WriteLeInt(sizeEntries);            // size of the central directory
			WriteLeInt((int)offset);            // offset of start of central dir
			WriteLeShort(zipComment.Length);
			baseOutputStream.Write(zipComment, 0, zipComment.Length);
			baseOutputStream.Flush();
			entries = null;
		}
Example #2
0
		/// <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.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 (entries == null) {
				throw new InvalidOperationException("ZipOutputStream was finished");
			}
			
			if (curEntry != null) {
				CloseEntry();
			}

			if (entries.Count >= 0xffff) {
				throw new ZipException("Too many entries for Zip file");
			}
			
			CompressionMethod method = entry.CompressionMethod;
			int compressionLevel = defaultCompressionLevel;
			
			entry.Flags = 0;
			patchEntryHeader = false;
			bool headerInfoAvailable = true;
			
			if (method == CompressionMethod.Stored) {
				if (entry.CompressedSize >= 0) {
					if (entry.Size < 0) {
						entry.Size = entry.CompressedSize;
					} else if (entry.Size != entry.CompressedSize) {
						throw new ZipException("Method STORED, but compressed size != size");
					}
				} else {
					if (entry.Size >= 0) {
						entry.CompressedSize = entry.Size;
					}
				}
					
				if (entry.Size < 0 || entry.Crc < 0) {
					if (CanPatchEntries == true) {
						headerInfoAvailable = false;
					}
					else {
						method = CompressionMethod.Deflated;
						compressionLevel = 0;
					}
				}
			}
				
			if (method == CompressionMethod.Deflated) {
				if (entry.Size == 0) {
					entry.CompressedSize = entry.Size;
					entry.Crc = 0;
					method = CompressionMethod.Stored;
				} else if (entry.CompressedSize < 0 || entry.Size < 0 || entry.Crc < 0) {
					headerInfoAvailable = false;
				}
			}
			
			if (headerInfoAvailable == false) {
				if (CanPatchEntries == false) {
					entry.Flags |= 8;
				} else {
					patchEntryHeader = true;
				}
			}
			
			if (Password != null) {
				entry.IsCrypted = true;
				if (entry.Crc < 0) {
					entry.Flags |= 8;
				}
			}
			entry.Offset = (int)offset;
			entry.CompressionMethod = (CompressionMethod)method;
			
			curMethod    = method;
			
			// Write the local file header
			WriteLeInt(ZipConstants.LOCSIG);
			
			WriteLeShort(entry.Version);
			WriteLeShort(entry.Flags);
			WriteLeShort((byte)method);
			WriteLeInt((int)entry.DosTime);
			if (headerInfoAvailable == true) {
				WriteLeInt((int)entry.Crc);
				WriteLeInt(entry.IsCrypted ? (int)entry.CompressedSize + ZipConstants.CRYPTO_HEADER_SIZE : (int)entry.CompressedSize);
				WriteLeInt((int)entry.Size);
			} else {
				if (patchEntryHeader == true) {
					headerPatchPos = baseOutputStream.Position;
				}
				WriteLeInt(0);	// Crc
				WriteLeInt(0);	// Compressed size
				WriteLeInt(0);	// Uncompressed size
			}
			
			byte[] name = ZipConstants.ConvertToArray(entry.Name);
			
			if (name.Length > 0xFFFF) {
				throw new ZipException("Entry name too long.");
			}

			byte[] extra = entry.ExtraData;
			if (extra == null) {
				extra = new byte[0];
			}

			if (extra.Length > 0xFFFF) {
				throw new ZipException("Extra data too long.");
			}
			
			WriteLeShort(name.Length);
			WriteLeShort(extra.Length);
			baseOutputStream.Write(name, 0, name.Length);
			baseOutputStream.Write(extra, 0, extra.Length);
			
			offset += ZipConstants.LOCHDR + name.Length + extra.Length;
			
			// Activate the entry.
			curEntry = entry;
			crc.Reset();
			if (method == CompressionMethod.Deflated) {
				def.Reset();
				def.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);
				}
			}
		}