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//
// System.Runtime.Remoting.Channels.Ipc.Win32.IpcChannelHelper.cs
//
// Author: Robert Jordan (robertj@gmx.net)
//
// Copyright (C) 2005 Novell, Inc (http://www.novell.com)
//
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System;
using System.IO;
using System.Runtime.Remoting;
using System.Runtime.Remoting.Channels;
using System.Runtime.Remoting.Messaging;
using System.Runtime.Serialization.Formatters.Binary;
namespace System.Runtime.Remoting.Channels.Ipc.Win32
{
/// <summary>
/// Provides helper services to the IpcChannel implementation.
/// </summary>
internal sealed class IpcChannelHelper
{
public const string Scheme = "ipc";
public const string SchemeStart = "ipc://";
IpcChannelHelper()
{
}
static readonly char[] InvalidPipeNameChars =
new char[] {'\\', '/'};
/// <summary>
/// Validates a pipe name.
/// </summary>
/// <param name="pipeName">The pipe name.</param>
/// <returns></returns>
public static bool IsValidPipeName(string pipeName)
{
if (pipeName == null || pipeName.Trim() == "")
return false;
if (pipeName.IndexOfAny(Path.InvalidPathChars) >= 0)
return false;
if (pipeName.IndexOfAny(InvalidPipeNameChars) >= 0)
return false;
return true;
}
/// <summary>
/// Parses an url against IpcChannel's rules.
/// </summary>
/// <param name="url">The url.</param>
/// <param name="pipeName">The pipe name.</param>
/// <param name="objectUri">The uri of the object.</param>
/// <returns>All but the object uri.</returns>
public static string Parse(string url, out string pipeName, out string objectUri)
{
if (url.StartsWith(SchemeStart))
{
int i = url.IndexOf('/', SchemeStart.Length);
if (i >= 0)
{
pipeName = url.Substring(SchemeStart.Length, i - SchemeStart.Length);
objectUri = url.Substring(i);
return SchemeStart + pipeName;
}
else
{
pipeName = url.Substring(SchemeStart.Length);
objectUri = null;
return SchemeStart + pipeName;
}
}
pipeName = null;
objectUri = null;
return null;
}
/// <summary>
/// Parses an url against IpcChannel's rules.
/// </summary>
/// <param name="url">The url.</param>
/// <param name="objectUri">The uri of the object.</param>
/// <returns>All but the object uri.</returns>
public static string Parse(string url, out string objectUri)
{
string pipeName;
return Parse(url, out pipeName, out objectUri);
}
/// <summary>
/// Copies a stream.
/// </summary>
/// <param name="input"></param>
/// <param name="output"></param>
public static void Copy(Stream input, Stream output)
{
MemoryStream ms = input as MemoryStream;
if (ms != null)
{
ms.WriteTo (output);
return;
}
// TODO: find out the optimal chunk size.
const int size = 1024 * 1024;
byte[] buffer = new byte[size];
int count;
while ((count = input.Read(buffer, 0, size)) > 0)
{
output.Write(buffer, 0, count);
}
}
}
}
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