/// <summary>
/// GZip解压函数
/// </summary>
/// <param name="data"></param>
/// <returns></returns>
public static byte[] GZipDecompress(byte[] data)
{
int bufferSize = 256;
using (MemoryStream stream = new MemoryStream())
{
using (GZipStream gZipStream = new GZipStream(new MemoryStream(data), CompressionMode.Decompress))
{
byte[] bytes = new byte[bufferSize];
int n;
while ((n = gZipStream.Read(bytes, 0, bytes.Length)) != 0)
{
stream.Write(bytes, 0, n);
}
gZipStream.Close();
gZipStream.Dispose();
}
byte[] rdata = stream.ToArray();
stream.Close();
stream.Dispose();
return rdata;
}
}
/// <summary>
/// Compresses an Epi Info 7 data package.
/// </summary>
/// <param name="fi">The file info for the raw data file that will be compressed.</param>
public static void CompressDataPackage(FileInfo fi)
{
using (FileStream inFile = fi.OpenRead())
{
// Prevent compressing hidden and already compressed files.
if ((File.GetAttributes(fi.FullName) & FileAttributes.Hidden)
!= FileAttributes.Hidden & fi.Extension != ".gz")
{
using (FileStream outFile = File.Create(fi.FullName + ".gz"))
{
using (GZipStream Compress = new GZipStream(outFile,
CompressionMode.Compress))
{
// Copy the source file into the compression stream.
byte[] buffer = new byte[4096];
int numRead;
while ((numRead = inFile.Read(buffer, 0, buffer.Length)) != 0)
{
Compress.Write(buffer, 0, numRead);
}
Compress.Close();
Compress.Dispose();
}
}
}
}
}
public string CompressHandHistory(string fullHandText)
{
if (fullHandText == null) return null;
//Transform string into byte[]
byte[] byteArray = new byte[fullHandText.Length];
int indexBA = 0;
foreach (char item in fullHandText.ToCharArray())
{
byteArray[indexBA++] = (byte)item;
}
//Prepare for compress
System.IO.MemoryStream ms = new System.IO.MemoryStream();
System.IO.Compression.GZipStream sw = new System.IO.Compression.GZipStream(ms,
System.IO.Compression.CompressionMode.Compress);
//Compress
sw.Write(byteArray, 0, byteArray.Length);
//Close, DO NOT FLUSH cause bytes will go missing...
sw.Close();
//Transform byte[] zip data to string
byteArray = ms.ToArray();
System.Text.StringBuilder sB = new System.Text.StringBuilder(byteArray.Length);
foreach (byte item in byteArray)
{
sB.Append((char)item);
}
ms.Close();
sw.Dispose();
ms.Dispose();
return sB.ToString();
}
public static Stream GetStream(Stream fileStream)
{
Stream objFileStream = null;
try
{
GZipStream gzip = new GZipStream(fileStream, CompressionMode.Decompress);
MemoryStream memStream = new MemoryStream();
byte[] bytes = new byte[1024];
int bytesRead = -1;
while (bytesRead != 0)
{
bytesRead = gzip.Read(bytes, 0, 1024);
memStream.Write(bytes, 0, bytesRead);
memStream.Flush();
}
memStream.Position = 0;
objFileStream = memStream;
gzip.Close();
gzip.Dispose();
fileStream.Dispose();
}
catch (Exception)
{
fileStream.Position = 0;
objFileStream = fileStream;
}
return objFileStream;
}
void backgroundWorker1DoWork(object sender, DoWorkEventArgs e)
{
try
{
var movimentoBancarioService = ResolveComponent<IMovimentoBancarioService>();
var infile = new FileStream(_fileName, FileMode.Open, FileAccess.Read, FileShare.Read);
var buffer = new byte[infile.Length];
infile.Read(buffer, 0, buffer.Length);
var ms = new MemoryStream();
var compressedzipStream = new GZipStream(ms, CompressionMode.Compress, true);
compressedzipStream.Write(buffer, 0, buffer.Length);
compressedzipStream.Close();
_id = movimentoBancarioService.Importazione(ms.ToArray(), infile.Length);
compressedzipStream.Close();
compressedzipStream.Dispose();
}
catch (FileNotFoundException ex)
{
_log.ErrorFormat("Errore nell'importazione di un file CBI - FILE NON TROVATO - {0} - azienda:{1}", ex, Utility.GetMethodDescription(), Security.Login.Instance.CurrentLogin().Azienda);
e.Result = string.Format("Il file '{0}' non è stato trovato", _fileName);
}
catch (Exception ex)
{
_log.ErrorFormat("Errore nell'importazione di un file CBI - {0} - azienda:{1}", ex, Utility.GetMethodDescription(), Security.Login.Instance.CurrentLogin().Azienda);
throw;
}
}
public static string Zip(string value)
{
//Transform string into byte[]
byte[] byteArray = new byte[value.Length];
int indexBA = 0;
char[] charArray = value.ToCharArray();
foreach (char item in charArray)
{
byteArray[indexBA++] = (byte)item;
}
//Prepare for compress
System.IO.MemoryStream ms = new System.IO.MemoryStream();
System.IO.Compression.GZipStream sw = new System.IO.Compression.GZipStream(ms,
System.IO.Compression.CompressionMode.Compress);
//Compress
sw.Write(byteArray, 0, byteArray.Length);
//Close, DO NOT FLUSH cause bytes will go missing...
sw.Close();
//Transform byte[] zip data to string
byteArray = ms.ToArray();
System.Text.StringBuilder sB = new System.Text.StringBuilder(byteArray.Length);
foreach (byte item in byteArray)
{
sB.Append((char)item);
}
ms.Close();
sw.Dispose();
ms.Dispose();
return(sB.ToString());
}
/// <summary>
/// 解压数据
/// </summary>
/// <param name="aSourceStream"></param>
/// <returns></returns>
public static byte[] DeCompress(Stream aSourceStream)
{
byte[] vUnZipByte = null;
GZipStream vUnZipStream;
using (MemoryStream vMemory = new MemoryStream())
{
vUnZipStream = new GZipStream(aSourceStream, CompressionMode.Decompress);
try
{
byte[] vTempByte = new byte[1024];
int vRedLen = 0;
do
{
vRedLen = vUnZipStream.Read(vTempByte, 0, vTempByte.Length);
vMemory.Write(vTempByte, 0, vRedLen);
}
while (vRedLen > 0);
vUnZipStream.Close();
}
finally
{
vUnZipStream.Dispose();
}
vUnZipByte = vMemory.ToArray();
}
return vUnZipByte;
}
public string UncompressHandHistory(string compressedHandHistory)
{
if (compressedHandHistory == null) return null;
byte[] byteArray = new byte[compressedHandHistory.Length];
int indexBa = 0;
foreach (char item in compressedHandHistory)
byteArray[indexBa++] = (byte)item;
MemoryStream memoryStream = new MemoryStream(byteArray);
GZipStream gZipStream = new GZipStream(memoryStream, CompressionMode.Decompress);
byteArray = new byte[1024];
StringBuilder stringBuilder = new StringBuilder();
int readBytes;
while ((readBytes = gZipStream.Read(byteArray, 0, byteArray.Length)) != 0)
{
for (int i = 0; i < readBytes; i++)
stringBuilder.Append((char)byteArray[i]);
}
gZipStream.Close();
memoryStream.Close();
gZipStream.Dispose();
memoryStream.Dispose();
return stringBuilder.ToString();
}
/// <summary>
/// 解压数据
/// </summary>
/// <param name="aSourceStream"></param>
/// <returns></returns>
public static byte[] DeCompress(Stream aSourceStream)
{
byte[] vUnZipByte = null;
GZipStream vUnZipStream;
using (MemoryStream vMemory = new MemoryStream())
{
vUnZipStream = new System.IO.Compression.GZipStream(aSourceStream, CompressionMode.Decompress);
try
{
byte[] vTempByte = new byte[1024];
int vRedLen = 0;
do
{
vRedLen = vUnZipStream.Read(vTempByte, 0, vTempByte.Length);
vMemory.Write(vTempByte, 0, vRedLen);
}while (vRedLen > 0);
vUnZipStream.Close();
}
finally
{
vUnZipStream.Dispose();
}
vUnZipByte = vMemory.ToArray();
}
return(vUnZipByte);
}
/// <summary>
/// 反序列化 解压缩
/// </summary>
/// <param name="bytes"></param>
/// <returns></returns>
public static object Deserialize(byte[] bytes)
{
MemoryStream msNew = new MemoryStream(bytes);
msNew.Position = 0;
GZipStream gzipStream = new GZipStream(msNew, CompressionMode.Decompress);//创建解压对象
byte[] buffer = new byte[4096];//定义数据缓冲
int offset = 0;//定义读取位置
MemoryStream ms = new MemoryStream();//定义内存流
while ((offset = gzipStream.Read(buffer, 0, buffer.Length)) != 0)
{
ms.Write(buffer, 0, offset);//解压后的数据写入内存流
}
BinaryFormatter sfFormatter = new BinaryFormatter();//定义BinaryFormatter以反序列化object对象
ms.Position = 0;//设置内存流的位置
object obj;
try
{
obj = (object)sfFormatter.Deserialize(ms);//反序列化
}
catch
{
throw;
}
finally
{
ms.Close();//关闭内存流
ms.Dispose();//释放资源
}
gzipStream.Close();//关闭解压缩流
gzipStream.Dispose();//释放资源
msNew.Close();
msNew.Dispose();
return obj;
}
private IEnumerator DoUploadData()
{
using (var inputStream = new MemoryStream())
{
var data = Encoding.UTF8.GetBytes(dataCache);
var gZip = new System.IO.Compression.GZipStream(inputStream, System.IO.Compression.CompressionMode.Compress);
gZip.Write(data, 0, data.Length);
gZip.Close();
var toUploadData = Convert.ToBase64String(inputStream.ToArray());
if (null != toUploadData && toUploadData.Length > 0)
{
using (var request = UnityEngine.Networking.UnityWebRequest.Put(serverUrl, toUploadData))
{
yield return(request.SendWebRequest());
if (request.isHttpError || request.isNetworkError)
{
LogUtil.DebugLog("send data error: " + request.error);
}
else
{
LogUtil.DebugLog("send data success: " + dataCache);
dataCache = "";
}
}
}
gZip.Dispose();
}
}
public async Task<SerializerParameters> SerializeAsync(object value, Stream stream, CancellationToken cancellationToken = new CancellationToken())
{
if (value == null) throw new ArgumentNullException(nameof(value));
if (stream == null) throw new ArgumentNullException(nameof(stream));
Stream innerStream = stream;
string contentEncoding = null;
switch (Algorithm)
{
case CompressAlgorithm.Identity:
break;
case CompressAlgorithm.Deflate:
innerStream = new DeflateStream(stream, CompressionLevel, true);
contentEncoding = "deflate";
break;
case CompressAlgorithm.GZip:
innerStream = new GZipStream(stream, CompressionLevel, true);
contentEncoding = "gzip";
break;
default:
throw new ArgumentOutOfRangeException(nameof(Algorithm));
}
try
{
var parameters = await InnerSerializer.SerializeAsync(value, innerStream, cancellationToken);
return new SerializerParameters(parameters.ContentType, contentEncoding);
}
finally
{
if (innerStream != stream)
innerStream.Dispose();
}
}
/// <summary>
/// Decompresses stream using GZip. Returns decompressed Stream.
/// Returns null if stream isn't compressed.
/// </summary>
/// <param name="compressedStream">Stream compressed with GZip.</param>
public static MemoryStream DecompressStream(Stream compressedStream)
{
MemoryStream newStream = new MemoryStream();
compressedStream.Seek(0, SeekOrigin.Begin);
GZipStream Decompressor = null;
try
{
Decompressor = new GZipStream(compressedStream, CompressionMode.Decompress, true);
Decompressor.CopyTo(newStream);
}
catch (InvalidDataException invdata)
{
return null;
}
catch(Exception e)
{
throw;
}
finally
{
if (Decompressor != null)
Decompressor.Dispose();
}
return newStream;
}
public static byte[] ZipToByte(string value, Encoding encode, bool useGzip = false)
{
byte[] byteArray = encode.GetBytes(value);
byte[] data = null;
//Prepare for compress
System.IO.MemoryStream ms = new System.IO.MemoryStream();
if (useGzip)
{
System.IO.Compression.GZipStream sw = new System.IO.Compression.GZipStream(ms, System.IO.Compression.CompressionMode.Compress);
//Compress
sw.Write(byteArray, 0, byteArray.Length);
//Close, DO NOT FLUSH cause bytes will go missing...
sw.Close();
sw.Dispose();
}
else
{
ms.Write(byteArray, 0, byteArray.Length);
}
data = ms.ToArray();
//Transform byte[] zip data to string
ms.Close();
ms.Dispose();
return(data);
}
public static string Decompress(string value)
{
//Transform string into byte[]
byte[] byteArray = new byte[value.Length];
int indexBA = 0;
foreach (char item in value.ToCharArray()) {
byteArray[indexBA++] = (byte)item;
}
//Prepare for decompress
System.IO.MemoryStream ms = new System.IO.MemoryStream(byteArray);
System.IO.Compression.GZipStream sr = new System.IO.Compression.GZipStream(ms,
System.IO.Compression.CompressionMode.Decompress);
//Reset variable to collect uncompressed result
byteArray = new byte[byteArray.Length];
//Decompress
int rByte = sr.Read(byteArray, 0, byteArray.Length);
//Transform byte[] unzip data to string
System.Text.StringBuilder sB = new System.Text.StringBuilder(rByte);
//Read the number of bytes GZipStream red and do not a for each bytes in
//resultByteArray;
for (int i = 0; i < rByte; i++) {
sB.Append((char)byteArray[i]);
}
sr.Close();
ms.Close();
sr.Dispose();
ms.Dispose();
return sB.ToString();
}
public static string GetTextForGzip(Stream stream, Encoding coding)
{
GZipStream gzip = new GZipStream(stream, CompressionMode.Decompress);
StreamReader reader = new StreamReader(gzip, coding);
string html = reader.ReadToEnd();
gzip.Close();
gzip.Dispose();
return html;
}
public static void CompressCanWrite()
{
var ms = new MemoryStream();
var zip = new GZipStream(ms, CompressionMode.Compress);
Assert.True(zip.CanWrite, "GZipStream not CanWrite with CompressionMode.Compress");
zip.Dispose();
Assert.False(zip.CanWrite, "GZipStream CanWrite after dispose");
}
public override void Write(long pageAddr, byte[] buf)
{
long pageOffs = 0;
if (pageAddr != 0)
{
Debug.Assert(buf.Length == Page.pageSize);
Debug.Assert((pageAddr & (Page.pageSize-1)) == 0);
long pagePos = pageMap.get(pageAddr);
bool firstUpdate = false;
if (pagePos == 0)
{
long bp = (pageAddr >> (Page.pageSizeLog - 3));
byte[] posBuf = new byte[8];
indexFile.Read(bp, posBuf);
pagePos = Bytes.unpack8(posBuf, 0);
firstUpdate = true;
}
int pageSize = ((int)pagePos & (Page.pageSize-1)) + 1;
MemoryStream ms = new MemoryStream();
GZipStream stream = new GZipStream(ms, CompressionMode.Compress, true);
stream.Write(buf, 0, buf.Length);
#if WINRT_NET_FRAMEWORK
stream.Dispose();
#else
stream.Close();
#endif
if (ms.Length < Page.pageSize)
{
buf = ms.ToArray();
}
else
{
byte[] copy = new byte[buf.Length];
Array.Copy(buf, 0, copy, 0, buf.Length);
}
crypt(buf, buf.Length);
int newPageBitSize = (buf.Length + ALLOCATION_QUANTUM - 1) >> ALLOCATION_QUANTUM_LOG;
int oldPageBitSize = (pageSize + ALLOCATION_QUANTUM - 1) >> ALLOCATION_QUANTUM_LOG;
if (firstUpdate || newPageBitSize != oldPageBitSize)
{
if (!firstUpdate)
{
Bitmap.free(bitmap, pagePos >> (Page.pageSizeLog + ALLOCATION_QUANTUM_LOG),
oldPageBitSize);
}
pageOffs = allocate(newPageBitSize);
}
else
{
pageOffs = pagePos >> Page.pageSizeLog;
}
pageMap.put(pageAddr, (pageOffs << Page.pageSizeLog) | (buf.Length-1), pagePos);
}
base.Write(pageOffs, buf);
}
public static void DecompressCanRead()
{
var ms = new MemoryStream();
var zip = new GZipStream(ms, CompressionMode.Decompress);
Assert.True(zip.CanRead, "GZipStream not CanRead in Decompress");
zip.Dispose();
Assert.False(zip.CanRead, "GZipStream CanRead after dispose in Decompress");
}
public static void CanDisposeGZipStream()
{
var ms = new MemoryStream();
var zip = new GZipStream(ms, CompressionMode.Compress);
zip.Dispose();
Assert.Null(zip.BaseStream);
zip.Dispose(); // Should be a no-op
}
/// <summary>
/// 压缩数据组
/// </summary>
/// <param name="source"></param>
/// <returns></returns>
public static byte[] Compress(this byte[] source)
{
using (var ms = new System.IO.MemoryStream())
using (var gzip = new System.IO.Compression.GZipStream(ms, CompressionMode.Compress))
{
gzip.Write(source);
gzip.Dispose();
return(ms.ToArray());
}
}
public string DecompressBytes(byte[] compressedByte)
{
// for holding decompressed byte
string result;
//Prepare for decompress
MemoryStream ms = new MemoryStream(compressedByte);
GZipStream compressor = new GZipStream(ms, CompressionMode.Decompress);
//Reset variable to collect uncompressed result
compressedByte = new byte[9999999];
//Decompress and rByte is size of decompressed stream
int rByte = compressor.Read(compressedByte, 0, compressedByte.Length);
//CompressedByte is now decompressed
MemoryStream decompressedStream = new MemoryStream(compressedByte);
//converting to string to return
StreamWriter writer = new StreamWriter(decompressedStream);
writer.Write(compressedByte);
writer.Flush();
decompressedStream.Position = 0;
StreamReader reader = new StreamReader(decompressedStream);
result = reader.ReadToEnd();
//XXXXXXXXX: TextBlockSize.Text = result.Length.ToString()+" B"; //This gives size of decompressedStream which is 9999999
//******TextBlockAnsSize.Text = rByte.ToString() + " B";
// Cleanup if they are to be used again
compressor.Dispose();
return result;
////Uncomment these if you want to use String instead of string (Some modification have to be done may be)
////Transform byte[] unzip data to string
//System.Text.StringBuilder sB = new System.Text.StringBuilder(rByte);
////Read the number of bytes GZipStream red and do not a for each bytes in
////resultByteArray;
//for (int i = 0; i < rByte; i++)
//{
// sB.Append((char)compressedByte[i]);
//}
//compressor.Dispose();
//ms.Dispose();
//TextBlockAnsSize.Text = sB.Length.ToString()+" B";
//return sB.ToString();
}
/// <summary>
/// Returns a decompressed byte array of a file compressed with GZip
/// </summary>
/// <param name="Input">Compressed file bytes</param>
/// <returns>Decompressed file bytes</returns>
/// <remarks>Find a better compression system?</remarks>
public static byte[] Decompress(byte[] Input)
{
MemoryStream InputMS = new MemoryStream(Input);
MemoryStream OutputMS = new MemoryStream();
using (GZipStream GZip = new GZipStream(InputMS, CompressionMode.Decompress))
{
GZip.CopyTo(OutputMS);
GZip.Dispose();
}
return OutputMS.ToArray();
}
public static byte[] CompressToSelf(object o)
{
byte[] buffer = ObjectToByteArrayToSelf(o);
MemoryStream stream = new MemoryStream();
GZipStream stream2 = new GZipStream(stream, CompressionMode.Compress, true);
stream2.Write(buffer, 0, buffer.Length);
stream2.Close();
stream2.Dispose();
byte[] buffer2 = stream.ToArray();
stream.Close();
stream.Dispose();
return buffer2;
}
/// <summary>
/// GZip压缩函数
/// </summary>
/// <param name="data"></param>
/// <returns></returns>
public static byte[] GZipCompress(byte[] data)
{
using (MemoryStream stream = new MemoryStream())
{
using (GZipStream gZipStream = new GZipStream(stream, CompressionMode.Compress))
{
gZipStream.Write(data, 0, data.Length);
gZipStream.Close();
gZipStream.Dispose();
}
return stream.ToArray();
}
}
static void GzipStream()
{
System.IO.FileStream newFileStream = new System.IO.FileStream("compressed.gz", System.IO.FileMode.Create);
System.IO.Compression.GZipStream gZipStream =
new System.IO.Compression.GZipStream(newFileStream, System.IO.Compression.CompressionLevel.Fastest);
byte[] bytes = System.Text.Encoding.Unicode.GetBytes("This is some text that will be compressed");
gZipStream.Write(bytes, 0, bytes.Length);
gZipStream.Dispose();
System.IO.Compression.GZipStream decompressStream =
new System.IO.Compression.GZipStream(System.IO.File.OpenRead("compressed.gz"), System.IO.Compression.CompressionMode.Decompress);
System.IO.StreamReader streamReader = new System.IO.StreamReader(decompressStream, System.Text.Encoding.Unicode);
System.Console.WriteLine(streamReader.ReadToEnd());
}
public static byte[] GZipDecompress(byte[] data)
{
//Console.WriteLine("GZipDecompress");
MemoryStream ms = new MemoryStream(data);
GZipStream stream = new GZipStream(ms, CompressionMode.Decompress);
byte[] buffer = StreamDataHelper.ReadDataToBytes(stream);
ms.Close();
ms.Dispose();
ms = null;
stream.Close();
stream.Dispose();
stream = null;
return buffer;
}
public static byte[] GZip(this byte[] bytes)
{
System.IO.MemoryStream ms = new System.IO.MemoryStream();
GZipStream gs = new GZipStream(ms, CompressionMode.Compress, true);
gs.Write(bytes, 0, bytes.Length);
gs.Close();
gs.Dispose();
ms.Position = 0;
bytes = new byte[ms.Length];
ms.Read(bytes, 0, (int)ms.Length);
ms.Close();
ms.Dispose();
return bytes;
}
protected override async Task<HttpResponseMessage> SendAsync(HttpRequestMessage request,
CancellationToken cancellationToken)
{
HttpResponseMessage response;
// Handle only if content type is 'application/gzip'
var contentEncoding = request.Content.Headers.ContentEncoding.FirstOrDefault();
if (contentEncoding == null ||
contentEncoding.Contains("gzip") == false)
{
response = await base.SendAsync(request, cancellationToken);
return Compress(response);
}
// Read in the input stream, then decompress in to the output stream.
// Doing this asynchronously, but not really required at this point
// since we end up waiting on it right after this.
Stream outputStream = new MemoryStream();
await request.Content.ReadAsStreamAsync().ContinueWith(t =>
{
Stream inputStream = t.Result;
var gzipStream = new GZipStream(inputStream, CompressionMode.Decompress);
CopyBetween(gzipStream, outputStream);
gzipStream.Dispose();
outputStream.Seek(0, SeekOrigin.Begin);
}, cancellationToken);
// This next section is the key...
// Save the original content
HttpContent origContent = request.Content;
// Replace request content with the newly decompressed stream
request.Content = new StreamContent(outputStream);
// Copy all headers from original content in to new one
foreach (var header in origContent.Headers)
{
foreach (var val in header.Value)
{
request.Content.Headers.Add(header.Key, val);
}
}
response = await base.SendAsync(request, cancellationToken);
return Compress(response);
}
public static byte[] GZipCompress(byte[] DATA)
{
//Console.WriteLine("GZipCompress");
MemoryStream ms = new MemoryStream();
GZipStream stream = new GZipStream(ms, CompressionMode.Compress, true);
stream.Write(DATA, 0, DATA.Length);
stream.Close();
stream.Dispose();
stream = null;
byte[] buffer = StreamDataHelper.ReadDataToBytes(ms);
ms.Close();
ms.Dispose();
ms = null;
return buffer;
}
public static Stream GZipCompress(Stream DATA)
{
Console.WriteLine("GZipCompress");
byte[] buffer = StreamDataHelper.ReadDataToBytes(DATA);
MemoryStream ms = new MemoryStream();
GZipStream stream = new GZipStream(ms, CompressionMode.Compress, true);
stream.Write(buffer, 0, buffer.Length);
stream.Close();
stream.Dispose();
stream = null;
if (ms.CanSeek)
{
ms.Position = 0;
}
return ms;
}
static Settings()
{
//检测是否支持开启GZIP
try
{
MemoryStream ms = new MemoryStream();
GZipStream gs = new GZipStream(ms, CompressionMode.Compress);
gs.Dispose();
ms.Dispose();
Settings.Opti_SupportGZip = true;
}
catch
{
Settings.Opti_SupportGZip = false;
}
}
// **********************************************************************
public static Stream GetDataStream(FileStream fs)
{
byte[] buffer = new byte[prefix.Length];
if(CheckPrefix(fs, buffer))
return fs;
Stream stream = null;
try
{
fs.Position = 0;
stream = new GZipStream(fs, CompressionMode.Decompress, true);
if(CheckPrefix(stream, buffer))
return stream;
}
catch { }
if(stream != null)
{
stream.Dispose();
stream = null;
}
try
{
fs.Position = 0;
stream = new DeflateStream(fs, CompressionMode.Decompress, true);
if(CheckPrefix(stream, buffer))
return stream;
}
catch { }
if(stream != null)
{
stream.Dispose();
stream = null;
}
throw new FormatException("Неверный формат файла");
}
private static void Assemble(List<string> files, string destinationDirectory,string extension)
{
FileStream writer = new FileStream(destinationDirectory + "assembled" + "." + extension,FileMode.Create);
for (int i = 0; i < files.Count; i++)
{
FileStream reader = new FileStream(destinationDirectory + files[i],FileMode.Open,FileAccess.ReadWrite);
GZipStream readerGzip = new GZipStream(reader,CompressionMode.Decompress);
int readBytesVariable = readerGzip.ReadByte();
while (readBytesVariable != -1)
{
writer.WriteByte((byte)readBytesVariable);
readBytesVariable = readerGzip.ReadByte();
}
readerGzip.Dispose();
reader.Dispose();
}
writer.Flush();
writer.Dispose();
}
protected override void Process(FileInfo inputFile, FileInfo outputFile)
{
using (FileStream inputStream = inputFile.OpenRead(), outputStream = outputFile.OpenWrite())
{
var zipStream = new GZipStream(outputStream, CompressionMode.Compress);
var buffer = new byte[_bufferSize];
var bytesRead = 0;
while ((bytesRead = inputStream.Read(buffer, 0, _bufferSize)) > 0)
{
if ((inputStream.Position + _bufferSize) % MaxBlockSize > MaxBlockSize)
{
zipStream.Dispose();
zipStream = new GZipStream(outputStream, CompressionMode.Compress);
}
zipStream.Write(buffer, 0, bytesRead);
}
zipStream.Dispose();
}
}
/// <summary>
/// 序列化压缩
/// </summary>
/// <param name="obj">需要压缩的对象</param>
/// <returns>Byte[]</returns>
public static byte[] Serializer(object obj)
{
IFormatter formatter = new BinaryFormatter();//定义BinaryFormatter以序列化object对象
MemoryStream ms = new MemoryStream();//创建内存流对象
formatter.Serialize(ms, obj);//把object对象序列化到内存流
byte[] buffer = ms.ToArray();//把内存流对象写入字节数组
ms.Close();//关闭内存流对象
ms.Dispose();//释放资源
MemoryStream msNew = new MemoryStream();
GZipStream gzipStream = new GZipStream(msNew, CompressionMode.Compress, true);//创建压缩对象
gzipStream.Write(buffer, 0, buffer.Length);//把压缩后的数据写入文件
gzipStream.Close();//关闭压缩流,这里要注意：一定要关闭，要不然解压缩的时候会出现小于4K的文件读取不到数据，大于4K的文件读取不完整
gzipStream.Dispose();//释放对象
var bufferNew = msNew.ToArray();
msNew.Close();
msNew.Dispose();
return bufferNew;
}
public static string UnZip(string value)
{
var inputByteArray = new byte[value.Length / 2];
for (var x = 0; x < inputByteArray.Length; x++)
{
var i = Convert.ToInt32(value.Substring(x * 2, 2), 16);
inputByteArray[x] = (byte)i;
}
//Transform string into byte[]
byte[] byteArray = inputByteArray;
//Prepare for decompress
System.IO.MemoryStream ms = new System.IO.MemoryStream(byteArray);
System.IO.Compression.GZipStream sr = new System.IO.Compression.GZipStream(ms,
System.IO.Compression.CompressionMode.Decompress);
//Reset variable to collect uncompressed result
byteArray = new byte[byteArray.Length];
//Decompress
int rByte = sr.Read(byteArray, 0, byteArray.Length);
//Transform byte[] unzip data to string
System.Text.StringBuilder sB = new System.Text.StringBuilder(rByte);
//Read the number of bytes GZipStream red and do not a for each bytes in
//resultByteArray;
for (int i = 0; i < rByte; i++)
{
sB.Append((char)byteArray[i]);
}
sr.Close();
ms.Close();
sr.Dispose();
ms.Dispose();
return(sB.ToString());
}
public static string UnZip(string value)
{
//Transform string into byte[]
byte[] byteArray = new byte[value.Length];
int indexBA = 0;
foreach (char item in value.ToCharArray())
{
byteArray[indexBA++] = (byte)item;
}
//Prepare for decompress
System.IO.MemoryStream ms = new System.IO.MemoryStream(byteArray);
System.IO.Compression.GZipStream sr = new System.IO.Compression.GZipStream(ms,
System.IO.Compression.CompressionMode.Decompress);
//Reset variable to collect uncompressed result
byteArray = new byte[byteArray.Length];
//Decompress
int rByte = sr.Read(byteArray, 0, byteArray.Length);
//Transform byte[] unzip data to string
System.Text.StringBuilder sB = new System.Text.StringBuilder(rByte);
//Read the number of bytes GZipStream red and do not a for each bytes in
//resultByteArray;
for (int i = 0; i < rByte; i++)
{
sB.Append((char)byteArray[i]);
}
sr.Close();
ms.Close();
sr.Dispose();
ms.Dispose();
return(sB.ToString());
}
public static string UnZip(string value)
{
System.Text.StringBuilder sB = new StringBuilder();
//Transform string into byte[]
byte[] byteArray = new byte[value.Length];
int indexBA = 0;
foreach (char item in value.ToCharArray())
{
byteArray[indexBA++] = (byte)item;
}
//Prepare for decompress
System.IO.MemoryStream ms = new System.IO.MemoryStream(byteArray);
System.IO.Compression.GZipStream sr = new System.IO.Compression.GZipStream(ms,
System.IO.Compression.CompressionMode.Decompress);
List <byte> byteList = new List <byte>();
//Reset variable to collect uncompressed result
//byteArray = new byte[byteArray.Length * 3 ];
int data = sr.ReadByte();
while (data != -1)
{
//sB.Append((char)data);
byteList.Add((byte)data);
data = sr.ReadByte();
}
//Decompress
sB.Append(Encoding.UTF8.GetString(byteList.ToArray()));
//Transform byte[] unzip data to string
//Read the number of bytes GZipStream red and do not a for each bytes in
sr.Close();
ms.Close();
sr.Dispose();
ms.Dispose();
return(sB.ToString());
}
public static string UnZip(StreamReader ms)
{
//Transform string into byte[]
//byte[] byteArray = new byte[ms.Length];
//ms.Read(byteArray, 0, ms.Length);
/*int indexBA = 0;
* foreach (char item in value.ToCharArray())
* {
* byteArray[indexBA++] = (byte)item;
* }*/
//Prepare for decompress
// System.IO.MemoryStream ms = new System.IO.MemoryStream(byteArray);
System.IO.Compression.GZipStream sr = new System.IO.Compression.GZipStream(ms.BaseStream,
System.IO.Compression.CompressionMode.Decompress);
//sr.Position = 0;
//Reset variable to collect uncompressed result
String ret = "";
//Decompress
//int rByte = sr.Read(byteArray, 0, byteArray.Length);
using (var srs = new StreamReader(sr))
{
ret = srs.ReadToEnd();
srs.Close();
srs.Dispose();
}
sr.Close();
ms.Close();
sr.Dispose();
ms.Dispose();
return(ret);
}
