/// <summary>
        /// SharpZip½âѹËõ
        /// </summary>
        /// <param name="buffer"></param>
        /// <returns></returns>
        public static byte[] DecompressSharpZip(byte[] buffer)
        {
            if (buffer == null || buffer.Length == 0)
            {
                return buffer;
            }

            using (MemoryStream inStream = new MemoryStream(buffer))
            {
                InflaterInputStream unCompressStream = new InflaterInputStream(inStream);
                MemoryStream outStream = new MemoryStream();
                int mSize;
                Byte[] mWriteData = new Byte[4096];
                while ((mSize = unCompressStream.Read(mWriteData, 0, mWriteData.Length)) > 0)
                {
                    outStream.Write(mWriteData, 0, mSize);
                }
                unCompressStream.Close();
                return outStream.ToArray();
            }
        }
Exemplo n.º 2
0
		/// <summary>
		/// Creates an input stream reading a zip entry
		/// </summary>
		/// <param name="entryIndex">The index of the entry to obtain an input stream for.</param>
		/// <returns>
		/// An input <see cref="Stream"/> containing data for this <paramref name="entryIndex"/>
		/// </returns>
		/// <exception cref="ObjectDisposedException">
		/// The ZipFile has already been closed
		/// </exception>
		/// <exception cref="SharpZip.Zip.ZipException">
		/// The compression method for the entry is unknown
		/// </exception>
		/// <exception cref="IndexOutOfRangeException">
		/// The entry is not found in the ZipFile
		/// </exception>
		public Stream GetInputStream(long entryIndex)
		{
			if ( isDisposed_ ) {
				throw new ObjectDisposedException("ZipFile");
			}
			
			long start = LocateEntry(entries_[entryIndex]);
			CompressionMethod method = entries_[entryIndex].CompressionMethod;
			Stream result = new PartialInputStream(this, start, entries_[entryIndex].CompressedSize);

			if (entries_[entryIndex].IsCrypted == true) {
#if NETCF_1_0
				throw new ZipException("decryption not supported for Compact Framework 1.0");
#else
				result = CreateAndInitDecryptionStream(result, entries_[entryIndex]);
				if (result == null) {
					throw new ZipException("Unable to decrypt this entry");
				}
#endif				
			}

			switch (method) {
				case CompressionMethod.Stored:
					// read as is.
					break;

				case CompressionMethod.Deflated:
					// No need to worry about ownership and closing as underlying stream close does nothing.
					result = new InflaterInputStream(result, new Inflater(true));
					break;

				default:
					throw new ZipException("Unsupported compression method " + method);
			}

			return result;
		}