protected override Stream GetStreamCore(FileMode mode, FileAccess access)
{
ZipPartStream zps;
MemoryStream stream;
if (Package.PartStreams.TryGetValue(Uri, out stream))
{
zps = new ZipPartStream(Package, stream, access);
if (mode == FileMode.Create)
{
stream.SetLength(0);
}
return(new ZipPartStream(Package, stream, access));
}
stream = new MemoryStream();
try
{
using (UnzipArchive archive = new UnzipArchive(Package.PackageStream))
{
foreach (string file in archive.GetFiles())
{
if (file != Uri.ToString().Substring(1))
{
continue;
}
using (Stream archiveStream = archive.GetStream(file))
{
int read = 0;
byte[] buffer = new byte [Math.Min(archiveStream.Length, 2 * 1024)];
while ((read = archiveStream.Read(buffer, 0, buffer.Length)) != 0)
{
stream.Write(buffer, 0, read);
}
}
}
}
}
catch
{
// The zipfile is invalid, so just create the file
// as if it didn't exist
stream.SetLength(0);
}
Package.PartStreams.Add(Uri, stream);
if (mode == FileMode.Create)
{
stream.SetLength(0);
}
return(new ZipPartStream(Package, stream, access));
}
protected override Stream GetStreamCore (FileMode mode, FileAccess access)
{
ZipPartStream zps;
MemoryStream stream;
if (Package.PartStreams.TryGetValue (Uri, out stream)) {
zps = new ZipPartStream (Package, stream, access);
if (mode == FileMode.Create)
stream.SetLength (0);
return new ZipPartStream (Package, stream, access);
}
stream = new MemoryStream ();
try
{
using (UnzipArchive archive = new UnzipArchive (Package.PackageStream)) {
foreach (string file in archive.GetFiles ()) {
if (file != Uri.ToString ().Substring (1))
continue;
using (Stream archiveStream = archive.GetStream (file)) {
int read = 0;
byte[] buffer = new byte [Math.Min (archiveStream.Length, 2 * 1024)];
while ((read = archiveStream.Read (buffer, 0, buffer.Length)) != 0)
stream.Write (buffer, 0, read);
}
}
}
}
catch
{
// The zipfile is invalid, so just create the file
// as if it didn't exist
stream.SetLength (0);
}
Package.PartStreams.Add (Uri, stream);
if (mode == FileMode.Create)
stream.SetLength (0);
return new ZipPartStream (Package, stream, access);
}
