mirror of
https://github.com/jellyfin/jellyfin.git
synced 2024-09-07 20:08:59 +02:00
339 lines
9.8 KiB
C#
339 lines
9.8 KiB
C#
// This code is derived from jcifs smb client library <jcifs at samba dot org>
|
||
// Ported by J. Arturo <webmaster at komodosoft dot net>
|
||
//
|
||
// This library is free software; you can redistribute it and/or
|
||
// modify it under the terms of the GNU Lesser General Public
|
||
// License as published by the Free Software Foundation; either
|
||
// version 2.1 of the License, or (at your option) any later version.
|
||
//
|
||
// This library is distributed in the hope that it will be useful,
|
||
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||
// Lesser General Public License for more details.
|
||
//
|
||
// You should have received a copy of the GNU Lesser General Public
|
||
// License along with this library; if not, write to the Free Software
|
||
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||
using System;
|
||
using System.IO;
|
||
using SharpCifs.Util.Sharpen;
|
||
using SharpCifs.Util.Transport;
|
||
|
||
namespace SharpCifs.Smb
|
||
{
|
||
/// <summary>This InputStream can read bytes from a file on an SMB file server.</summary>
|
||
/// <remarks>This InputStream can read bytes from a file on an SMB file server. Offsets are 64 bits.
|
||
/// </remarks>
|
||
public class SmbFileInputStream : InputStream
|
||
{
|
||
private long _fp;
|
||
|
||
private int _readSize;
|
||
|
||
private int _openFlags;
|
||
|
||
private int _access;
|
||
|
||
private byte[] _tmp = new byte[1];
|
||
|
||
internal SmbFile File;
|
||
|
||
/// <summary>
|
||
/// Creates an
|
||
/// <see cref="System.IO.InputStream">System.IO.InputStream</see>
|
||
/// for reading bytes from a file on
|
||
/// an SMB server addressed by the <code>url</code> parameter. See
|
||
/// <see cref="SmbFile">SmbFile</see>
|
||
/// for a detailed description and examples of the smb
|
||
/// URL syntax.
|
||
/// </summary>
|
||
/// <param name="url">An smb URL string representing the file to read from</param>
|
||
/// <exception cref="SharpCifs.Smb.SmbException"></exception>
|
||
/// <exception cref="System.UriFormatException"></exception>
|
||
/// <exception cref="UnknownHostException"></exception>
|
||
public SmbFileInputStream(string url) : this(new SmbFile(url))
|
||
{
|
||
}
|
||
|
||
/// <summary>
|
||
/// Creates an
|
||
/// <see cref="System.IO.InputStream">System.IO.InputStream</see>
|
||
/// for reading bytes from a file on
|
||
/// an SMB server represented by the
|
||
/// <see cref="SmbFile">SmbFile</see>
|
||
/// parameter. See
|
||
/// <see cref="SmbFile">SmbFile</see>
|
||
/// for a detailed description and examples of
|
||
/// the smb URL syntax.
|
||
/// </summary>
|
||
/// <param name="file">An <code>SmbFile</code> specifying the file to read from</param>
|
||
/// <exception cref="SharpCifs.Smb.SmbException"></exception>
|
||
/// <exception cref="System.UriFormatException"></exception>
|
||
/// <exception cref="UnknownHostException"></exception>
|
||
public SmbFileInputStream(SmbFile file) : this(file, SmbFile.ORdonly)
|
||
{
|
||
}
|
||
|
||
/// <exception cref="SharpCifs.Smb.SmbException"></exception>
|
||
/// <exception cref="System.UriFormatException"></exception>
|
||
/// <exception cref="UnknownHostException"></exception>
|
||
internal SmbFileInputStream(SmbFile file, int openFlags)
|
||
{
|
||
this.File = file;
|
||
this._openFlags = openFlags & 0xFFFF;
|
||
_access = ((int)(((uint)openFlags) >> 16)) & 0xFFFF;
|
||
if (file.Type != SmbFile.TypeNamedPipe)
|
||
{
|
||
file.Open(openFlags, _access, SmbFile.AttrNormal, 0);
|
||
this._openFlags &= ~(SmbFile.OCreat | SmbFile.OTrunc);
|
||
}
|
||
else
|
||
{
|
||
file.Connect0();
|
||
}
|
||
_readSize = Math.Min(file.Tree.Session.transport.RcvBufSize - 70, file.Tree.Session
|
||
.transport.Server.MaxBufferSize - 70);
|
||
}
|
||
|
||
protected internal virtual IOException SeToIoe(SmbException se)
|
||
{
|
||
IOException ioe = se;
|
||
Exception root = se.GetRootCause();
|
||
if (root is TransportException)
|
||
{
|
||
ioe = (TransportException)root;
|
||
root = ((TransportException)ioe).GetRootCause();
|
||
}
|
||
if (root is Exception)
|
||
{
|
||
ioe = new IOException(root.Message);
|
||
ioe.InitCause(root);
|
||
}
|
||
return ioe;
|
||
}
|
||
|
||
/// <summary>Closes this input stream and releases any system resources associated with the stream.
|
||
/// </summary>
|
||
/// <remarks>Closes this input stream and releases any system resources associated with the stream.
|
||
/// </remarks>
|
||
/// <exception cref="System.IO.IOException">if a network error occurs</exception>
|
||
public override void Close()
|
||
{
|
||
try
|
||
{
|
||
File.Close();
|
||
_tmp = null;
|
||
}
|
||
catch (SmbException se)
|
||
{
|
||
throw SeToIoe(se);
|
||
}
|
||
}
|
||
|
||
/// <summary>Reads a byte of data from this input stream.</summary>
|
||
/// <remarks>Reads a byte of data from this input stream.</remarks>
|
||
/// <exception cref="System.IO.IOException">if a network error occurs</exception>
|
||
public override int Read()
|
||
{
|
||
// need oplocks to cache otherwise use BufferedInputStream
|
||
if (Read(_tmp, 0, 1) == -1)
|
||
{
|
||
return -1;
|
||
}
|
||
return _tmp[0] & unchecked(0xFF);
|
||
}
|
||
|
||
/// <summary>Reads up to b.length bytes of data from this input stream into an array of bytes.
|
||
/// </summary>
|
||
/// <remarks>Reads up to b.length bytes of data from this input stream into an array of bytes.
|
||
/// </remarks>
|
||
/// <exception cref="System.IO.IOException">if a network error occurs</exception>
|
||
public override int Read(byte[] b)
|
||
{
|
||
return Read(b, 0, b.Length);
|
||
}
|
||
|
||
/// <summary>Reads up to len bytes of data from this input stream into an array of bytes.
|
||
/// </summary>
|
||
/// <remarks>Reads up to len bytes of data from this input stream into an array of bytes.
|
||
/// </remarks>
|
||
/// <exception cref="System.IO.IOException">if a network error occurs</exception>
|
||
public override int Read(byte[] b, int off, int len)
|
||
{
|
||
return ReadDirect(b, off, len);
|
||
}
|
||
|
||
/// <exception cref="System.IO.IOException"></exception>
|
||
public virtual int ReadDirect(byte[] b, int off, int len)
|
||
{
|
||
if (len <= 0)
|
||
{
|
||
return 0;
|
||
}
|
||
|
||
long start = _fp;
|
||
if (_tmp == null)
|
||
{
|
||
throw new IOException("Bad file descriptor");
|
||
}
|
||
|
||
// ensure file is open
|
||
File.Open(_openFlags, _access, SmbFile.AttrNormal, 0);
|
||
if (File.Log.Level >= 4)
|
||
{
|
||
File.Log.WriteLine("read: fid=" + File.Fid + ",off=" + off + ",len=" + len);
|
||
}
|
||
|
||
SmbComReadAndXResponse response = new SmbComReadAndXResponse(b, off);
|
||
if (File.Type == SmbFile.TypeNamedPipe)
|
||
{
|
||
response.ResponseTimeout = 0;
|
||
}
|
||
|
||
int r;
|
||
int n;
|
||
do
|
||
{
|
||
r = len > _readSize ? _readSize : len;
|
||
if (File.Log.Level >= 4)
|
||
{
|
||
File.Log.WriteLine("read: len=" + len + ",r=" + r + ",fp=" + _fp);
|
||
}
|
||
|
||
try
|
||
{
|
||
SmbComReadAndX request = new SmbComReadAndX(File.Fid, _fp, r, null);
|
||
if (File.Type == SmbFile.TypeNamedPipe)
|
||
{
|
||
request.MinCount = request.MaxCount = request.Remaining = 1024;
|
||
}
|
||
//<2F><><EFBFBD><EFBFBD><EFBFBD>œǂݍ<C782><DD8D><EFBFBD><EFBFBD>ł<EFBFBD><C582><EFBFBD><EFBFBD>炵<EFBFBD><E782B5><EFBFBD>B
|
||
File.Send(request, response);
|
||
}
|
||
catch (SmbException se)
|
||
{
|
||
if (File.Type == SmbFile.TypeNamedPipe && se.GetNtStatus() == NtStatus.NtStatusPipeBroken)
|
||
{
|
||
return -1;
|
||
}
|
||
throw SeToIoe(se);
|
||
}
|
||
|
||
if ((n = response.DataLength) <= 0)
|
||
{
|
||
return (int)((_fp - start) > 0L ? _fp - start : -1);
|
||
}
|
||
|
||
_fp += n;
|
||
len -= n;
|
||
response.Off += n;
|
||
}
|
||
while (len > 0 && n == r);
|
||
|
||
|
||
return (int)(_fp - start);
|
||
}
|
||
|
||
/// <summary>This stream class is unbuffered.</summary>
|
||
/// <remarks>
|
||
/// This stream class is unbuffered. Therefore this method will always
|
||
/// return 0 for streams connected to regular files. However, a
|
||
/// stream created from a Named Pipe this method will query the server using a
|
||
/// "peek named pipe" operation and return the number of available bytes
|
||
/// on the server.
|
||
/// </remarks>
|
||
/// <exception cref="System.IO.IOException"></exception>
|
||
public override int Available()
|
||
{
|
||
SmbNamedPipe pipe;
|
||
TransPeekNamedPipe req;
|
||
TransPeekNamedPipeResponse resp;
|
||
if (File.Type != SmbFile.TypeNamedPipe)
|
||
{
|
||
return 0;
|
||
}
|
||
try
|
||
{
|
||
pipe = (SmbNamedPipe)File;
|
||
File.Open(SmbFile.OExcl, pipe.PipeType & 0xFF0000, SmbFile.AttrNormal
|
||
, 0);
|
||
req = new TransPeekNamedPipe(File.Unc, File.Fid);
|
||
resp = new TransPeekNamedPipeResponse(pipe);
|
||
pipe.Send(req, resp);
|
||
if (resp.status == TransPeekNamedPipeResponse.StatusDisconnected || resp.status
|
||
== TransPeekNamedPipeResponse.StatusServerEndClosed)
|
||
{
|
||
File.Opened = false;
|
||
return 0;
|
||
}
|
||
return resp.Available;
|
||
}
|
||
catch (SmbException se)
|
||
{
|
||
throw SeToIoe(se);
|
||
}
|
||
}
|
||
|
||
/// <summary>Skip n bytes of data on this stream.</summary>
|
||
/// <remarks>
|
||
/// Skip n bytes of data on this stream. This operation will not result
|
||
/// in any IO with the server. Unlink <tt>InputStream</tt> value less than
|
||
/// the one provided will not be returned if it exceeds the end of the file
|
||
/// (if this is a problem let us know).
|
||
/// </remarks>
|
||
/// <exception cref="System.IO.IOException"></exception>
|
||
public override long Skip(long n)
|
||
{
|
||
if (n > 0)
|
||
{
|
||
_fp += n;
|
||
return n;
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
|
||
/// <summary>
|
||
/// Position in Stream
|
||
/// </summary>
|
||
/// <remarks>
|
||
/// Add by dobes
|
||
/// mod interface to WrappedSystemStream readable, for random access.
|
||
/// </remarks>
|
||
internal override long Position {
|
||
get { return this._fp; }
|
||
set
|
||
{
|
||
var tmpPos = value;
|
||
var length = File.Length();
|
||
if (tmpPos < 0)
|
||
tmpPos = 0;
|
||
else if (length < tmpPos)
|
||
tmpPos = length;
|
||
this._fp = tmpPos;
|
||
}
|
||
}
|
||
|
||
/// <summary>
|
||
///
|
||
/// </summary>
|
||
/// <returns></returns>
|
||
/// <remarks>
|
||
/// Add by dobes
|
||
/// mod interface to WrappedSystemStream readable, for random access.
|
||
/// </remarks>
|
||
internal override bool CanSeek()
|
||
{
|
||
return (File.Length() >= 0);
|
||
}
|
||
|
||
/// <summary>
|
||
/// Get file length
|
||
/// </summary>
|
||
public override long Length
|
||
{
|
||
get { return File.Length(); }
|
||
}
|
||
|
||
}
|
||
}
|