/// <summary>
/// Initializes a new instance of the <see cref="FileSystemProvider" /> class with the given base path.
/// </summary>
/// <param name="rootPath">The root path of this provider.</param>
/// <param name="localBasePath">The path to a local directory where this instance will load the files from.</param>
public ZipFileSystemProvider(string rootPath, string zipFilePath) : base(rootPath)
{
zipFile = new ZipFile(zipFilePath);
zipFileEntries = zipFile.GetAllEntries()
.Where(x => x.FilenameInZip.StartsWith("assets/data/"))
.ToDictionary(x => x.FilenameInZip
.Replace("assets/data/", string.Empty),
x => x);
}
/// <summary>
/// Add all the entries from a zip file on the system.
/// </summary>
/// <param name="path">
/// Path to the zip file
/// </param>
public void MergeZipFile(string path)
{
ZipFileEntry[] merge;
using (var zip = new ZipFile(path))
{
merge = zip.GetAllEntries();
}
this.AddZipFileEntries(merge);
}
private static void CopyFileOrDirectory(Logger logger, string sourceDir, string root, string path)
{
// Root path not handled
if (root.Length == 0)
throw new NotSupportedException();
try
{
var zipFile = new ZipFile(sourceDir);
foreach (var zipEntry in zipFile.GetAllEntries())
{
var zipFilename = zipEntry.FilenameInZip;
if (!zipFilename.StartsWith(root))
continue;
// Get filename without leading "assets/data"
var assetFilename = zipFilename.Substring(root.Length);
var fullPath = path + assetFilename;
var directoryName = VirtualFileSystem.GetParentFolder(fullPath);
try
{
if (directoryName != string.Empty)
ApplicationData.CreateDirectory(directoryName);
}
catch (IOException)
{
}
using (var output = ApplicationData.OpenStream(fullPath, VirtualFileMode.Create, VirtualFileAccess.Write))
zipFile.ExtractFile(zipEntry, output);
}
}
catch (IOException ex)
{
logger.Info("I/O Exception", ex);
}
}
/// <summary>
/// Ensures that the zip file is valid.
/// </summary>
/// <param name="validationHandler">
/// The class to hold the object for progress reporting
/// </param>
/// <returns>
/// True if the zip is valid, otherwise False.
/// </returns>
public static bool Validate(ZipFileValidationHandler validationHandler)
{
var buf = new byte[1024 * 256];
try
{
var zip = new ZipFile(validationHandler.Filename);
ZipFileEntry[] entries = zip.GetAllEntries();
// First calculate the total compressed length
long totalCompressedLength = entries.Sum(entry => entry.CompressedSize);
float averageVerifySpeed = 0;
long totalBytesRemaining = totalCompressedLength;
validationHandler.TotalBytes = totalCompressedLength;
// Then calculate a CRC for every file in the Zip file,
// comparing it to what is stored in the Zip directory
foreach (ZipFileEntry entry in entries)
{
if (entry.Crc32 != -1)
{
DateTime startTime = DateTime.UtcNow;
var crc = new Crc32();
uint offset = entry.FileOffset;
var length = (int)entry.CompressedSize;
Stream raf = zip.zipFileStream;
raf.Seek(offset, SeekOrigin.Begin);
while (length > 0)
{
int seek = length > buf.Length ? buf.Length : length;
raf.Read(buf, 0, seek);
crc.Update(buf, 0, seek);
length -= seek;
DateTime currentTime = DateTime.UtcNow;
var timePassed = (float)(currentTime - startTime).TotalMilliseconds;
if (timePassed > 0)
{
float currentSpeedSample = seek / timePassed;
if (averageVerifySpeed <= 0)
{
averageVerifySpeed = (SmoothingFactor * currentSpeedSample)
+ ((1 - SmoothingFactor) * averageVerifySpeed);
}
else
{
averageVerifySpeed = currentSpeedSample;
}
totalBytesRemaining -= seek;
var timeRemaining = (long)(totalBytesRemaining / averageVerifySpeed);
validationHandler.AverageSpeed = averageVerifySpeed;
validationHandler.CurrentBytes = totalCompressedLength - totalBytesRemaining;
validationHandler.TimeRemaining = timeRemaining;
validationHandler.UpdateUi(validationHandler);
}
startTime = currentTime;
if (validationHandler.ShouldCancel)
{
return(true);
}
}
if (crc.Value != entry.Crc32)
{
Debug.WriteLine("CRC does not match for entry: " + entry.FilenameInZip);
Debug.WriteLine("In file: " + entry.ZipFileName);
return(false);
}
}
}
}
catch (IOException e)
{
Console.WriteLine(e.ToString());
Console.Write(e.StackTrace);
return(false);
}
return(true);
}
/// <summary>
/// Add all the entries from a zip file on the system.
/// </summary>
/// <param name="path">
/// Path to the zip file
/// </param>
public void MergeZipFile(string path)
{
ZipFileEntry[] merge;
using (var zip = new ZipFile(path))
{
merge = zip.GetAllEntries();
}
this.AddZipFileEntries(merge);
}
/// <summary>
/// Ensures that the zip file is valid.
/// </summary>
/// <param name="validationHandler">
/// The class to hold the object for progress reporting
/// </param>
/// <returns>
/// True if the zip is valid, otherwise False.
/// </returns>
public static bool Validate(ZipFileValidationHandler validationHandler)
{
var buf = new byte[1024 * 256];
try
{
var zip = new ZipFile(validationHandler.Filename);
ZipFileEntry[] entries = zip.GetAllEntries();
// First calculate the total compressed length
long totalCompressedLength = entries.Sum(entry => entry.CompressedSize);
float averageVerifySpeed = 0;
long totalBytesRemaining = totalCompressedLength;
validationHandler.TotalBytes = totalCompressedLength;
// Then calculate a CRC for every file in the Zip file,
// comparing it to what is stored in the Zip directory
foreach (ZipFileEntry entry in entries)
{
if (entry.Crc32 != -1)
{
DateTime startTime = DateTime.UtcNow;
var crc = new Crc32();
uint offset = entry.FileOffset;
var length = (int)entry.CompressedSize;
Stream raf = zip.zipFileStream;
raf.Seek(offset, SeekOrigin.Begin);
while (length > 0)
{
int seek = length > buf.Length ? buf.Length : length;
raf.Read(buf, 0, seek);
crc.Update(buf, 0, seek);
length -= seek;
DateTime currentTime = DateTime.UtcNow;
var timePassed = (float)(currentTime - startTime).TotalMilliseconds;
if (timePassed > 0)
{
float currentSpeedSample = seek / timePassed;
if (averageVerifySpeed <= 0)
{
averageVerifySpeed = (SmoothingFactor * currentSpeedSample)
+ ((1 - SmoothingFactor) * averageVerifySpeed);
}
else
{
averageVerifySpeed = currentSpeedSample;
}
totalBytesRemaining -= seek;
var timeRemaining = (long)(totalBytesRemaining / averageVerifySpeed);
validationHandler.AverageSpeed = averageVerifySpeed;
validationHandler.CurrentBytes = totalCompressedLength - totalBytesRemaining;
validationHandler.TimeRemaining = timeRemaining;
validationHandler.UpdateUi(validationHandler);
}
startTime = currentTime;
if (validationHandler.ShouldCancel)
{
return true;
}
}
if (crc.Value != entry.Crc32)
{
Debug.WriteLine("CRC does not match for entry: " + entry.FilenameInZip);
Debug.WriteLine("In file: " + entry.ZipFileName);
return false;
}
}
}
}
catch (IOException e)
{
Console.WriteLine(e.ToString());
Console.Write(e.StackTrace);
return false;
}
return true;
}