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