148 lines
4.2 KiB
C#
148 lines
4.2 KiB
C#
//
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// System.Web.UI.LosFormatter
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//
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// Authors:
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// Ben Maurer (bmaurer@users.sourceforge.net)
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// Gonzalo Paniagua Javier (gonzalo@ximian.com)
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//
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// (C) 2003 Ben Maurer
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// Copyright (C) 2005-2010 Novell, Inc (http://www.novell.com)
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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.Configuration;
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using System.IO;
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using System.Security.Permissions;
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using System.Text;
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using System.Web.Util;
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namespace System.Web.UI {
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// CAS - no InheritanceDemand here as the class is sealed
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[AspNetHostingPermission (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
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public sealed class LosFormatter
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{
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ObjectStateFormatter osf;
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public LosFormatter ()
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{
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osf = new ObjectStateFormatter ();
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}
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public LosFormatter (bool enableMac, string macKeyModifier) : this (enableMac, String.IsNullOrEmpty (macKeyModifier) ? null : Encoding.ASCII.GetBytes (macKeyModifier))
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{
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}
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public LosFormatter (bool enableMac, byte[] macKeyModifier)
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{
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osf = new ObjectStateFormatter ();
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if (enableMac && (macKeyModifier != null)) {
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SetMacKey (macKeyModifier);
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}
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}
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private void SetMacKey (byte[] macKeyModifier)
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{
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try {
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osf.Section.ValidationKey = MachineKeySectionUtils.GetHexString (macKeyModifier);
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}
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catch (ArgumentException) {
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}
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catch (ConfigurationErrorsException) {
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// bad key (e.g. size), default key will be used
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}
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}
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public object Deserialize (Stream stream)
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{
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if (stream == null)
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throw new ArgumentNullException ("stream");
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#if NET_4_0
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using (StreamReader sr = new StreamReader (stream)) {
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return Deserialize (sr.ReadToEnd ());
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}
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#else
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long streamLength = -1;
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if (stream.CanSeek)
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streamLength = stream.Length;
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MemoryStream ms = null;
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if (streamLength != -1 && (stream is MemoryStream) && stream.Position == 0) {
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// We save allocating a new stream and reading in this case.
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ms = (MemoryStream) stream;
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} else {
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byte [] bytes = new byte [streamLength >= 0 ? streamLength : 2048];
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ms = new MemoryStream ();
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int n;
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while ((n = stream.Read (bytes, 0, bytes.Length)) > 0)
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ms.Write (bytes, 0, n);
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streamLength = ms.Length;
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}
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string b64 = Encoding.ASCII.GetString (ms.GetBuffer (),
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0, (int) streamLength);
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return Deserialize (b64);
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#endif
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}
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public object Deserialize (TextReader input)
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{
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if (input == null)
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throw new ArgumentNullException ("input");
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return Deserialize (input.ReadToEnd ());
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}
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public object Deserialize (string input)
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{
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if (input == null)
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return null;
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return osf.Deserialize (input);
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}
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internal string SerializeToBase64 (object value)
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{
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return osf.Serialize (value);
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}
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public void Serialize (Stream stream, object value)
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{
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if (stream == null)
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throw new ArgumentNullException ("stream");
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#if NET_4_0
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if (!stream.CanSeek)
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throw new NotSupportedException ();
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#endif
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string b64 = SerializeToBase64 (value);
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byte [] bytes = Encoding.ASCII.GetBytes (b64);
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stream.Write (bytes, 0, bytes.Length);
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}
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public void Serialize (TextWriter output, object value)
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{
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if (output == null)
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throw new ArgumentNullException ("output");
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output.Write (SerializeToBase64 (value));
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}
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}
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}
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