/// <summary>
/// 压缩单个文件
/// </summary>
/// <param name="fileToZip">要压缩的文件</param>
/// <param name="zipedFile">压缩后的文件</param>
/// <param name="compressionLevel">压缩等级</param>
/// <param name="blockSize">每次写入大小</param>
public void ZipFile(string fileToZip, string zipedFile, int compressionLevel, int blockSize)
{
//如果文件没有找到，则报错
if (!System.IO.File.Exists(fileToZip))
{
throw new System.IO.FileNotFoundException("指定要压缩的文件: " + fileToZip + " 不存在!");
}
using (System.IO.FileStream ZipFile = System.IO.File.Create(zipedFile))
{
using (ZipOutputStream ZipStream = new ZipOutputStream(ZipFile))
{
using (System.IO.FileStream StreamToZip = new System.IO.FileStream(fileToZip, System.IO.FileMode.Open, System.IO.FileAccess.Read))
{
string fileName = fileToZip.Substring(fileToZip.LastIndexOf("\\") + 1);
ZipEntry ZipEntry = new ZipEntry(fileName);
ZipStream.PutNextEntry(ZipEntry);
ZipStream.SetLevel(compressionLevel);
byte[] buffer = new byte[blockSize];
int sizeRead = 0;
try
{
do
{
sizeRead = StreamToZip.Read(buffer, 0, buffer.Length);
ZipStream.Write(buffer, 0, sizeRead);
}
while (sizeRead > 0);
}
catch (System.Exception ex)
{
throw ex;
}
StreamToZip.Close();
}
ZipStream.Finish();
ZipStream.Close();
}
ZipFile.Close();
}
}
/// <summary>
/// 压缩单个文件
/// </summary>
/// <param name="fileToZip">要进行压缩的文件名</param>
/// <param name="zipedFile">压缩后生成的压缩文件名</param>
/// <param name="compressionLevel">压缩级别</param>
public void ZipFile(string fileToZip, string zipedFile, int compressionLevel = 9)
{
//如果文件没有找到，则报错
if (!File.Exists(fileToZip))
{
throw new System.IO.FileNotFoundException("指定要压缩的文件: " + fileToZip + " 不存在!");
}
using (FileStream fs = File.OpenRead(fileToZip))
{
byte[] buffer = new byte[fs.Length];
fs.Read(buffer, 0, buffer.Length);
fs.Close();
using (FileStream ZipFile = File.Create(zipedFile))
{
using (ZipOutputStream ZipStream = new ZipOutputStream(ZipFile))
{
string fileName = fileToZip.Substring(fileToZip.LastIndexOf("\\") + 1);
ZipEntry ZipEntry = new ZipEntry(fileName);
ZipStream.PutNextEntry(ZipEntry);
ZipStream.SetLevel(compressionLevel);
ZipStream.Write(buffer, 0, buffer.Length);
ZipStream.Finish();
ZipStream.Close();
}
}
}
}
/// <summary>
/// 压缩多层目录
/// </summary>
/// <param name="strDirectory">The directory.</param>
/// <param name="zipedFile">The ziped file.</param>
public void ZipFileDirectory(string strDirectory, string zipedFile)
{
using (System.IO.FileStream ZipFile = System.IO.File.Create(zipedFile))
{
using (ZipOutputStream s = new ZipOutputStream(ZipFile))
{
ZipSetp(strDirectory, s, "");
}
}
}
/// <summary>
/// 递归遍历目录
/// </summary>
/// <param name="strDirectory">The directory.</param>
/// <param name="s">The ZipOutputStream Object.</param>
/// <param name="parentPath">The parent path.</param>
private void ZipSetp(string strDirectory, ZipOutputStream s, string parentPath)
{
if (strDirectory[strDirectory.Length - 1] != Path.DirectorySeparatorChar)
{
strDirectory += Path.DirectorySeparatorChar;
}
CRC32 crc = new CRC32();
string[] filenames = Directory.GetFileSystemEntries(strDirectory);
foreach (string file in filenames)// 遍历所有的文件和目录
{
if (Directory.Exists(file))// 先当作目录处理如果存在这个目录就递归Copy该目录下面的文件
{
string pPath = parentPath;
pPath += file.Substring(file.LastIndexOf("\\") + 1);
pPath += "\\";
ZipSetp(file, s, pPath);
}
else // 否则直接压缩文件
{
//打开压缩文件
using (FileStream fs = File.OpenRead(file))
{
byte[] buffer = new byte[fs.Length];
fs.Read(buffer, 0, buffer.Length);
string fileName = parentPath + file.Substring(file.LastIndexOf("\\") + 1);
ZipEntry entry = new ZipEntry(fileName);
//entry.DateTime = DateTime.Now;
entry.Size = fs.Length;
fs.Close();
crc.Reset();
crc.Update(buffer);
entry.Crc = crc.Value;
s.PutNextEntry(entry);
s.Write(buffer, 0, buffer.Length);
}
}
}
}
public int WriteDataToZipFile(string zipPath, CancellationToken cancellationToken, Action<string, double> progressCallback)
{
// create a zip file to hold all data
#if __ANDROID__
ZipOutputStream zipFile = null;
#elif __IOS__
ZipArchive zipFile = null;
#endif
// write all data to separate JSON files. zip files for convenience.
string directory = null;
Dictionary<string, StreamWriter> datumTypeFile = new Dictionary<string, StreamWriter>();
try
{
string directoryName = Protocol.Name + "_Data_" + DateTime.UtcNow.ToShortDateString() + "_" + DateTime.UtcNow.ToShortTimeString();
directoryName = new Regex("[^a-zA-Z0-9]").Replace(directoryName, "_");
directory = Path.Combine(SensusServiceHelper.SHARE_DIRECTORY, directoryName);
if (Directory.Exists(directory))
Directory.Delete(directory, true);
Directory.CreateDirectory(directory);
if (progressCallback != null)
progressCallback("Gathering data...", 0);
int totalDataCount = 0;
foreach (Tuple<string, string> datumTypeLine in GetDataLinesToWrite(cancellationToken, progressCallback))
{
string datumType = datumTypeLine.Item1;
string line = datumTypeLine.Item2;
StreamWriter file;
if (datumTypeFile.TryGetValue(datumType, out file))
file.WriteLine(",");
else
{
file = new StreamWriter(Path.Combine(directory, datumType + ".json"));
file.WriteLine("[");
datumTypeFile.Add(datumType, file);
}
file.Write(line);
++totalDataCount;
}
// close all files
foreach (StreamWriter file in datumTypeFile.Values)
{
file.Write(Environment.NewLine + "]");
file.Close();
}
cancellationToken.ThrowIfCancellationRequested();
if (progressCallback != null)
progressCallback("Compressing data...", 0);
#if __ANDROID__
directoryName += '/';
zipFile = new ZipOutputStream(new FileStream(zipPath, FileMode.Create, FileAccess.Write));
zipFile.PutNextEntry(new ZipEntry(directoryName));
int dataWritten = 0;
foreach (string path in Directory.GetFiles(directory))
{
// start json file for data of current type
zipFile.PutNextEntry(new ZipEntry(directoryName + Path.GetFileName(path)));
using (StreamReader file = new StreamReader(path))
{
string line;
while ((line = file.ReadLine()) != null)
{
if (progressCallback != null && totalDataCount >= 10 && (dataWritten % (totalDataCount / 10)) == 0)
progressCallback(null, dataWritten / (double)totalDataCount);
cancellationToken.ThrowIfCancellationRequested();
zipFile.Write(file.CurrentEncoding.GetBytes(line + Environment.NewLine));
if (line != "[" && line != "]")
++dataWritten;
}
}
zipFile.CloseEntry();
System.IO.File.Delete(path);
}
// close entry for directory
zipFile.CloseEntry();
#elif __IOS__
zipFile = new ZipArchive();
zipFile.CreateZipFile(zipPath);
zipFile.AddFolder(directory, null);
#endif
if (progressCallback != null)
progressCallback(null, 1);
return totalDataCount;
}
finally
{
// ensure that zip file is closed.
try
{
if (zipFile != null)
{
#if __ANDROID__
zipFile.Close();
#elif __IOS__
zipFile.CloseZipFile();
#endif
}
}
catch (Exception)
{
}
// ensure that all temporary files are closed/deleted.
foreach (string datumType in datumTypeFile.Keys)
{
try
{
datumTypeFile[datumType].Close();
}
catch (Exception)
{
}
}
try
{
Directory.Delete(directory, true);
}
catch (Exception)
{
}
}
}
