1 files changed, 149 insertions, 0 deletions
diff --git a/SocketHttpListener/PayloadData.cs b/SocketHttpListener/PayloadData.cs
new file mode 100644
index 000000000..a6318da2b
--- /dev/null
+++ b/SocketHttpListener/PayloadData.cs
@@ -0,0 +1,149 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Text;
+
+namespace SocketHttpListener
+{
+  internal class PayloadData : IEnumerable<byte>
+  {
+    #region Private Fields
+
+    private byte [] _applicationData;
+    private byte [] _extensionData;
+    private bool    _masked;
+
+    #endregion
+
+    #region Public Const Fields
+
+    public const ulong MaxLength = long.MaxValue;
+
+    #endregion
+
+    #region Public Constructors
+
+    public PayloadData ()
+      : this (new byte [0], new byte [0], false)
+    {
+    }
+
+    public PayloadData (byte [] applicationData)
+      : this (new byte [0], applicationData, false)
+    {
+    }
+
+    public PayloadData (string applicationData)
+      : this (new byte [0], Encoding.UTF8.GetBytes (applicationData), false)
+    {
+    }
+
+    public PayloadData (byte [] applicationData, bool masked)
+      : this (new byte [0], applicationData, masked)
+    {
+    }
+
+    public PayloadData (byte [] extensionData, byte [] applicationData, bool masked)
+    {
+      _extensionData = extensionData;
+      _applicationData = applicationData;
+      _masked = masked;
+    }
+
+    #endregion
+
+    #region Internal Properties
+
+    internal bool ContainsReservedCloseStatusCode {
+      get {
+        return _applicationData.Length > 1 &&
+               _applicationData.SubArray (0, 2).ToUInt16 (ByteOrder.Big).IsReserved ();
+      }
+    }
+
+    #endregion
+
+    #region Public Properties
+
+    public byte [] ApplicationData {
+      get {
+        return _applicationData;
+      }
+    }
+
+    public byte [] ExtensionData {
+      get {
+        return _extensionData;
+      }
+    }
+
+    public bool IsMasked {
+      get {
+        return _masked;
+      }
+    }
+
+    public ulong Length {
+      get {
+        return (ulong) (_extensionData.Length + _applicationData.Length);
+      }
+    }
+
+    #endregion
+
+    #region Private Methods
+
+    private static void mask (byte [] src, byte [] key)
+    {
+      for (long i = 0; i < src.Length; i++)
+        src [i] = (byte) (src [i] ^ key [i % 4]);
+    }
+
+    #endregion
+
+    #region Public Methods
+
+    public IEnumerator<byte> GetEnumerator ()
+    {
+      foreach (byte b in _extensionData)
+        yield return b;
+
+      foreach (byte b in _applicationData)
+        yield return b;
+    }
+
+    public void Mask (byte [] maskingKey)
+    {
+      if (_extensionData.Length > 0)
+        mask (_extensionData, maskingKey);
+
+      if (_applicationData.Length > 0)
+        mask (_applicationData, maskingKey);
+
+      _masked = !_masked;
+    }
+
+    public byte [] ToByteArray ()
+    {
+      return _extensionData.Length > 0
+             ? new List<byte> (this).ToArray ()
+             : _applicationData;
+    }
+
+    public override string ToString ()
+    {
+      return BitConverter.ToString (ToByteArray ());
+    }
+
+    #endregion
+
+    #region Explicitly Implemented Interface Members
+
+    IEnumerator IEnumerable.GetEnumerator ()
+    {
+      return GetEnumerator ();
+    }
+
+    #endregion
+  }
+}