using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.ComponentModel;
using System.Diagnostics;
using System.Globalization;
using System.IO;
using System.IO.Compression;
using System.Linq;
using System.Net;
using System.Net.Security;
using System.Net.Sockets;
using System.Reflection;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using System.Runtime.Serialization;
using System.Security.Authentication;
using System.Security.Cryptography;
using System.Security.Cryptography.X509Certificates;
using System.Security.Permissions;
using System.Security.Principal;
using System.Text;
using System.Threading;
using System.Timers;
using WebSocketSharp.Net;
using WebSocketSharp.Net.WebSockets;

[assembly: CompilationRelaxations(8)]
[assembly: RuntimeCompatibility(WrapNonExceptionThrows = true)]
[assembly: Debuggable(DebuggableAttribute.DebuggingModes.Default | DebuggableAttribute.DebuggingModes.DisableOptimizations | DebuggableAttribute.DebuggingModes.IgnoreSymbolStoreSequencePoints | DebuggableAttribute.DebuggingModes.EnableEditAndContinue)]
[assembly: AssemblyTitle("websocket-sharp")]
[assembly: AssemblyDescription("A C# implementation of the WebSocket protocol client and server")]
[assembly: AssemblyConfiguration("")]
[assembly: AssemblyCompany("")]
[assembly: AssemblyProduct("websocket-sharp.dll")]
[assembly: AssemblyCopyright("sta.blockhead")]
[assembly: AssemblyTrademark("")]
[assembly: AssemblyVersion("1.0.2.29017")]
namespace WebSocketSharp
{
	public static class Ext
	{
		private static readonly byte[] _last = new byte[1];

		private static readonly int _retry = 5;

		private const string _tspecials = "()<>@,;:\\\"/[]?={} \t";

		private static byte[] compress(this byte[] data)
		{
			if (data.LongLength == 0)
			{
				return data;
			}
			using MemoryStream stream = new MemoryStream(data);
			return stream.compressToArray();
		}

		private static MemoryStream compress(this Stream stream)
		{
			MemoryStream memoryStream = new MemoryStream();
			if (stream.Length == 0)
			{
				return memoryStream;
			}
			stream.Position = 0L;
			using DeflateStream deflateStream = new DeflateStream(memoryStream, CompressionMode.Compress, leaveOpen: true);
			CopyTo(stream, deflateStream, 1024);
			deflateStream.Close();
			memoryStream.Write(_last, 0, 1);
			memoryStream.Position = 0L;
			return memoryStream;
		}

		private static byte[] compressToArray(this Stream stream)
		{
			using MemoryStream memoryStream = stream.compress();
			memoryStream.Close();
			return memoryStream.ToArray();
		}

		private static byte[] decompress(this byte[] data)
		{
			if (data.LongLength == 0)
			{
				return data;
			}
			using MemoryStream stream = new MemoryStream(data);
			return stream.decompressToArray();
		}

		private static MemoryStream decompress(this Stream stream)
		{
			MemoryStream memoryStream = new MemoryStream();
			if (stream.Length == 0)
			{
				return memoryStream;
			}
			stream.Position = 0L;
			using DeflateStream source = new DeflateStream(stream, CompressionMode.Decompress, leaveOpen: true);
			CopyTo(source, memoryStream, 1024);
			memoryStream.Position = 0L;
			return memoryStream;
		}

		private static byte[] decompressToArray(this Stream stream)
		{
			using MemoryStream memoryStream = stream.decompress();
			memoryStream.Close();
			return memoryStream.ToArray();
		}

		private static bool isHttpMethod(this string value)
		{
			int result;
			switch (value)
			{
			default:
				result = ((value == "TRACE") ? 1 : 0);
				break;
			case "GET":
			case "HEAD":
			case "POST":
			case "PUT":
			case "DELETE":
			case "CONNECT":
			case "OPTIONS":
				result = 1;
				break;
			}
			return (byte)result != 0;
		}

		private static bool isHttpMethod10(this string value)
		{
			return value == "GET" || value == "HEAD" || value == "POST";
		}

		internal static byte[] Append(this ushort code, string reason)
		{
			byte[] array = code.InternalToByteArray(ByteOrder.Big);
			if (reason == null || reason.Length == 0)
			{
				return array;
			}
			List<byte> list = new List<byte>(array);
			list.AddRange(Encoding.UTF8.GetBytes(reason));
			return list.ToArray();
		}

		internal static byte[] Compress(this byte[] data, CompressionMethod method)
		{
			return (method == CompressionMethod.Deflate) ? data.compress() : data;
		}

		internal static Stream Compress(this Stream stream, CompressionMethod method)
		{
			return (method == CompressionMethod.Deflate) ? stream.compress() : stream;
		}

		internal static byte[] CompressToArray(this Stream stream, CompressionMethod method)
		{
			return (method == CompressionMethod.Deflate) ? stream.compressToArray() : stream.ToByteArray();
		}

		internal static bool Contains(this string value, params char[] anyOf)
		{
			return anyOf != null && anyOf.Length != 0 && value.IndexOfAny(anyOf) > -1;
		}

		internal static bool Contains(this NameValueCollection collection, string name)
		{
			return collection[name] != null;
		}

		internal static bool Contains(this NameValueCollection collection, string name, string value, StringComparison comparisonTypeForValue)
		{
			string text = collection[name];
			if (text == null)
			{
				return false;
			}
			string[] array = text.Split(new char[1] { ',' });
			foreach (string text2 in array)
			{
				if (text2.Trim().Equals(value, comparisonTypeForValue))
				{
					return true;
				}
			}
			return false;
		}

		internal static bool Contains<T>(this IEnumerable<T> source, Func<T, bool> condition)
		{
			foreach (T item in source)
			{
				if (condition(item))
				{
					return true;
				}
			}
			return false;
		}

		internal static bool ContainsTwice(this string[] values)
		{
			int len = values.Length;
			int end = len - 1;
			Func<int, bool> seek = null;
			seek = delegate(int idx)
			{
				if (idx == end)
				{
					return false;
				}
				string text = values[idx];
				for (int i = idx + 1; i < len; i++)
				{
					if (values[i] == text)
					{
						return true;
					}
				}
				return seek(++idx);
			};
			return seek(0);
		}

		internal static T[] Copy<T>(this T[] source, int length)
		{
			T[] array = new T[length];
			Array.Copy(source, 0, array, 0, length);
			return array;
		}

		internal static T[] Copy<T>(this T[] source, long length)
		{
			T[] array = new T[length];
			Array.Copy(source, 0L, array, 0L, length);
			return array;
		}

		internal static void CopyTo(this Stream source, Stream destination, int bufferLength)
		{
			byte[] buffer = new byte[bufferLength];
			int num = 0;
			while (true)
			{
				num = source.Read(buffer, 0, bufferLength);
				if (num <= 0)
				{
					break;
				}
				destination.Write(buffer, 0, num);
			}
		}

		internal static void CopyToAsync(this Stream source, Stream destination, int bufferLength, Action completed, Action<Exception> error)
		{
			byte[] buff = new byte[bufferLength];
			AsyncCallback callback = null;
			callback = delegate(IAsyncResult ar)
			{
				try
				{
					int num = source.EndRead(ar);
					if (num <= 0)
					{
						if (completed != null)
						{
							completed();
						}
					}
					else
					{
						destination.Write(buff, 0, num);
						source.BeginRead(buff, 0, bufferLength, callback, null);
					}
				}
				catch (Exception obj2)
				{
					if (error != null)
					{
						error(obj2);
					}
				}
			};
			try
			{
				source.BeginRead(buff, 0, bufferLength, callback, null);
			}
			catch (Exception obj)
			{
				if (error != null)
				{
					error(obj);
				}
			}
		}

		internal static byte[] Decompress(this byte[] data, CompressionMethod method)
		{
			return (method == CompressionMethod.Deflate) ? data.decompress() : data;
		}

		internal static Stream Decompress(this Stream stream, CompressionMethod method)
		{
			return (method == CompressionMethod.Deflate) ? stream.decompress() : stream;
		}

		internal static byte[] DecompressToArray(this Stream stream, CompressionMethod method)
		{
			return (method == CompressionMethod.Deflate) ? stream.decompressToArray() : stream.ToByteArray();
		}

		internal static void Emit(this EventHandler eventHandler, object sender, EventArgs e)
		{
			eventHandler?.Invoke(sender, e);
		}

		internal static void Emit<TEventArgs>(this EventHandler<TEventArgs> eventHandler, object sender, TEventArgs e) where TEventArgs : EventArgs
		{
			eventHandler?.Invoke(sender, e);
		}

		internal static bool EqualsWith(this int value, char c, Action<int> action)
		{
			action(value);
			return value == c;
		}

		internal static string GetAbsolutePath(this Uri uri)
		{
			if (uri.IsAbsoluteUri)
			{
				return uri.AbsolutePath;
			}
			string originalString = uri.OriginalString;
			if (originalString[0] != '/')
			{
				return null;
			}
			int num = originalString.IndexOfAny(new char[2] { '?', '#' });
			return (num > 0) ? originalString.Substring(0, num) : originalString;
		}

		internal static WebSocketSharp.Net.CookieCollection GetCookies(this NameValueCollection headers, bool response)
		{
			string text = headers[response ? "Set-Cookie" : "Cookie"];
			return (text != null) ? WebSocketSharp.Net.CookieCollection.Parse(text, response) : new WebSocketSharp.Net.CookieCollection();
		}

		internal static string GetDnsSafeHost(this Uri uri, bool bracketIPv6)
		{
			return (bracketIPv6 && uri.HostNameType == UriHostNameType.IPv6) ? uri.Host : uri.DnsSafeHost;
		}

		internal static string GetMessage(this CloseStatusCode code)
		{
			return code switch
			{
				CloseStatusCode.TlsHandshakeFailure => "An error has occurred during a TLS handshake.", 
				CloseStatusCode.ServerError => "WebSocket server got an internal error.", 
				CloseStatusCode.MandatoryExtension => "WebSocket client didn't receive expected extension(s).", 
				CloseStatusCode.TooBig => "A too big message has been received.", 
				CloseStatusCode.PolicyViolation => "A policy violation has occurred.", 
				CloseStatusCode.InvalidData => "Invalid data has been received.", 
				CloseStatusCode.Abnormal => "An exception has occurred.", 
				CloseStatusCode.UnsupportedData => "Unsupported data has been received.", 
				CloseStatusCode.ProtocolError => "A WebSocket protocol error has occurred.", 
				_ => string.Empty, 
			};
		}

		internal static string GetName(this string nameAndValue, char separator)
		{
			int num = nameAndValue.IndexOf(separator);
			return (num > 0) ? nameAndValue.Substring(0, num).Trim() : null;
		}

		internal static string GetUTF8DecodedString(this byte[] bytes)
		{
			return Encoding.UTF8.GetString(bytes);
		}

		internal static byte[] GetUTF8EncodedBytes(this string s)
		{
			return Encoding.UTF8.GetBytes(s);
		}

		internal static string GetValue(this string nameAndValue, char separator)
		{
			return nameAndValue.GetValue(separator, unquote: false);
		}

		internal static string GetValue(this string nameAndValue, char separator, bool unquote)
		{
			int num = nameAndValue.IndexOf(separator);
			if (num < 0 || num == nameAndValue.Length - 1)
			{
				return null;
			}
			string text = nameAndValue.Substring(num + 1).Trim();
			return unquote ? text.Unquote() : text;
		}

		internal static byte[] InternalToByteArray(this ushort value, ByteOrder order)
		{
			byte[] bytes = BitConverter.GetBytes(value);
			if (!order.IsHostOrder())
			{
				Array.Reverse((Array)bytes);
			}
			return bytes;
		}

		internal static byte[] InternalToByteArray(this ulong value, ByteOrder order)
		{
			byte[] bytes = BitConverter.GetBytes(value);
			if (!order.IsHostOrder())
			{
				Array.Reverse((Array)bytes);
			}
			return bytes;
		}

		internal static bool IsCompressionExtension(this string value, CompressionMethod method)
		{
			return value.StartsWith(method.ToExtensionString());
		}

		internal static bool IsControl(this byte opcode)
		{
			return opcode > 7 && opcode < 16;
		}

		internal static bool IsControl(this Opcode opcode)
		{
			return (int)opcode >= 8;
		}

		internal static bool IsData(this byte opcode)
		{
			return opcode == 1 || opcode == 2;
		}

		internal static bool IsData(this Opcode opcode)
		{
			return opcode == Opcode.Text || opcode == Opcode.Binary;
		}

		internal static bool IsHttpMethod(this string value, Version version)
		{
			return (version == WebSocketSharp.Net.HttpVersion.Version10) ? value.isHttpMethod10() : value.isHttpMethod();
		}

		internal static bool IsPortNumber(this int value)
		{
			return value > 0 && value < 65536;
		}

		internal static bool IsReserved(this ushort code)
		{
			return code == 1004 || code == 1005 || code == 1006 || code == 1015;
		}

		internal static bool IsReserved(this CloseStatusCode code)
		{
			return code == CloseStatusCode.Undefined || code == CloseStatusCode.NoStatus || code == CloseStatusCode.Abnormal || code == CloseStatusCode.TlsHandshakeFailure;
		}

		internal static bool IsSupported(this byte opcode)
		{
			return Enum.IsDefined(typeof(Opcode), opcode);
		}

		internal static bool IsText(this string value)
		{
			int length = value.Length;
			for (int i = 0; i < length; i++)
			{
				char c = value[i];
				if (c < ' ')
				{
					if ("\r\n\t".IndexOf(c) == -1)
					{
						return false;
					}
					if (c == '\n')
					{
						i++;
						if (i == length)
						{
							break;
						}
						c = value[i];
						if (" \t".IndexOf(c) == -1)
						{
							return false;
						}
					}
				}
				else if (c == '\u007f')
				{
					return false;
				}
			}
			return true;
		}

		internal static bool IsToken(this string value)
		{
			foreach (char c in value)
			{
				if (c < ' ')
				{
					return false;
				}
				if (c > '~')
				{
					return false;
				}
				if ("()<>@,;:\\\"/[]?={} \t".IndexOf(c) > -1)
				{
					return false;
				}
			}
			return true;
		}

		internal static bool KeepsAlive(this NameValueCollection headers, Version version)
		{
			StringComparison comparisonTypeForValue = StringComparison.OrdinalIgnoreCase;
			return (version < WebSocketSharp.Net.HttpVersion.Version11) ? headers.Contains("Connection", "keep-alive", comparisonTypeForValue) : (!headers.Contains("Connection", "close", comparisonTypeForValue));
		}

		internal static string Quote(this string value)
		{
			return string.Format("\"{0}\"", value.Replace("\"", "\\\""));
		}

		internal static byte[] ReadBytes(this Stream stream, int length)
		{
			byte[] array = new byte[length];
			int num = 0;
			int num2 = 0;
			int num3 = 0;
			while (length > 0)
			{
				num3 = stream.Read(array, num, length);
				if (num3 <= 0)
				{
					if (num2 >= _retry)
					{
						return array.SubArray(0, num);
					}
					num2++;
				}
				else
				{
					num2 = 0;
					num += num3;
					length -= num3;
				}
			}
			return array;
		}

		internal static byte[] ReadBytes(this Stream stream, long length, int bufferLength)
		{
			using MemoryStream memoryStream = new MemoryStream();
			byte[] buffer = new byte[bufferLength];
			int num = 0;
			int num2 = 0;
			while (length > 0)
			{
				if (length < bufferLength)
				{
					bufferLength = (int)length;
				}
				num2 = stream.Read(buffer, 0, bufferLength);
				if (num2 <= 0)
				{
					if (num >= _retry)
					{
						break;
					}
					num++;
				}
				else
				{
					num = 0;
					memoryStream.Write(buffer, 0, num2);
					length -= num2;
				}
			}
			memoryStream.Close();
			return memoryStream.ToArray();
		}

		internal static void ReadBytesAsync(this Stream stream, int length, Action<byte[]> completed, Action<Exception> error)
		{
			byte[] buff = new byte[length];
			int offset = 0;
			int retry = 0;
			AsyncCallback callback = null;
			callback = delegate(IAsyncResult ar)
			{
				try
				{
					int num = stream.EndRead(ar);
					if (num <= 0)
					{
						if (retry < _retry)
						{
							retry++;
							stream.BeginRead(buff, offset, length, callback, null);
						}
						else if (completed != null)
						{
							completed(buff.SubArray(0, offset));
						}
					}
					else if (num == length)
					{
						if (completed != null)
						{
							completed(buff);
						}
					}
					else
					{
						retry = 0;
						offset += num;
						length -= num;
						stream.BeginRead(buff, offset, length, callback, null);
					}
				}
				catch (Exception obj2)
				{
					if (error != null)
					{
						error(obj2);
					}
				}
			};
			try
			{
				stream.BeginRead(buff, offset, length, callback, null);
			}
			catch (Exception obj)
			{
				if (error != null)
				{
					error(obj);
				}
			}
		}

		internal static void ReadBytesAsync(this Stream stream, long length, int bufferLength, Action<byte[]> completed, Action<Exception> error)
		{
			MemoryStream dest = new MemoryStream();
			byte[] buff = new byte[bufferLength];
			int retry = 0;
			Action<long> read = null;
			read = delegate(long len)
			{
				if (len < bufferLength)
				{
					bufferLength = (int)len;
				}
				stream.BeginRead(buff, 0, bufferLength, delegate(IAsyncResult ar)
				{
					try
					{
						int num = stream.EndRead(ar);
						if (num <= 0)
						{
							if (retry < _retry)
							{
								int num2 = retry;
								retry = num2 + 1;
								read(len);
							}
							else
							{
								if (completed != null)
								{
									dest.Close();
									completed(dest.ToArray());
								}
								dest.Dispose();
							}
						}
						else
						{
							dest.Write(buff, 0, num);
							if (num == len)
							{
								if (completed != null)
								{
									dest.Close();
									completed(dest.ToArray());
								}
								dest.Dispose();
							}
							else
							{
								retry = 0;
								read(len - num);
							}
						}
					}
					catch (Exception obj2)
					{
						dest.Dispose();
						if (error != null)
						{
							error(obj2);
						}
					}
				}, null);
			};
			try
			{
				read(length);
			}
			catch (Exception obj)
			{
				dest.Dispose();
				if (error != null)
				{
					error(obj);
				}
			}
		}

		internal static T[] Reverse<T>(this T[] array)
		{
			int num = array.Length;
			T[] array2 = new T[num];
			int num2 = num - 1;
			for (int i = 0; i <= num2; i++)
			{
				array2[i] = array[num2 - i];
			}
			return array2;
		}

		internal static IEnumerable<string> SplitHeaderValue(this string value, params char[] separators)
		{
			int len = value.Length;
			int end = len - 1;
			StringBuilder buff = new StringBuilder(32);
			bool escaped = false;
			bool quoted = false;
			for (int i = 0; i <= end; i++)
			{
				char c = value[i];
				buff.Append(c);
				switch (c)
				{
				case '"':
					if (escaped)
					{
						escaped = false;
					}
					else
					{
						quoted = !quoted;
					}
					continue;
				case '\\':
					if (i == end)
					{
						break;
					}
					if (value[i + 1] == '"')
					{
						escaped = true;
					}
					continue;
				default:
					if (Array.IndexOf(separators, c) > -1 && !quoted)
					{
						buff.Length--;
						yield return buff.ToString();
						buff.Length = 0;
					}
					continue;
				}
				break;
			}
			yield return buff.ToString();
		}

		internal static byte[] ToByteArray(this Stream stream)
		{
			using MemoryStream memoryStream = new MemoryStream();
			stream.Position = 0L;
			CopyTo(stream, memoryStream, 1024);
			memoryStream.Close();
			return memoryStream.ToArray();
		}

		internal static CompressionMethod ToCompressionMethod(this string value)
		{
			Array values = Enum.GetValues(typeof(CompressionMethod));
			foreach (CompressionMethod item in values)
			{
				if (item.ToExtensionString() == value)
				{
					return item;
				}
			}
			return CompressionMethod.None;
		}

		internal static string ToExtensionString(this CompressionMethod method, params string[] parameters)
		{
			if (method == CompressionMethod.None)
			{
				return string.Empty;
			}
			string text = $"permessage-{method.ToString().ToLower()}";
			return (parameters != null && parameters.Length != 0) ? string.Format("{0}; {1}", text, parameters.ToString("; ")) : text;
		}

		internal static IPAddress ToIPAddress(this string value)
		{
			if (value == null || value.Length == 0)
			{
				return null;
			}
			if (IPAddress.TryParse(value, out IPAddress address))
			{
				return address;
			}
			try
			{
				IPAddress[] hostAddresses = Dns.GetHostAddresses(value);
				return hostAddresses[0];
			}
			catch
			{
				return null;
			}
		}

		internal static List<TSource> ToList<TSource>(this IEnumerable<TSource> source)
		{
			return new List<TSource>(source);
		}

		internal static string ToString(this IPAddress address, bool bracketIPv6)
		{
			return (bracketIPv6 && address.AddressFamily == AddressFamily.InterNetworkV6) ? $"[{address.ToString()}]" : address.ToString();
		}

		internal static ushort ToUInt16(this byte[] source, ByteOrder sourceOrder)
		{
			return BitConverter.ToUInt16(source.ToHostOrder(sourceOrder), 0);
		}

		internal static ulong ToUInt64(this byte[] source, ByteOrder sourceOrder)
		{
			return BitConverter.ToUInt64(source.ToHostOrder(sourceOrder), 0);
		}

		internal static IEnumerable<string> TrimEach(this IEnumerable<string> source)
		{
			foreach (string elm in source)
			{
				yield return elm.Trim();
			}
		}

		internal static string TrimSlashFromEnd(this string value)
		{
			string text = value.TrimEnd(new char[1] { '/' });
			return (text.Length > 0) ? text : "/";
		}

		internal static string TrimSlashOrBackslashFromEnd(this string value)
		{
			string text = value.TrimEnd('/', '\\');
			return (text.Length > 0) ? text : value[0].ToString();
		}

		internal static bool TryCreateVersion(this string versionString, out Version result)
		{
			result = null;
			try
			{
				result = new Version(versionString);
			}
			catch
			{
				return false;
			}
			return true;
		}

		internal static bool TryCreateWebSocketUri(this string uriString, out Uri result, out string message)
		{
			result = null;
			message = null;
			Uri uri = uriString.ToUri();
			if (uri == null)
			{
				message = "An invalid URI string.";
				return false;
			}
			if (!uri.IsAbsoluteUri)
			{
				message = "A relative URI.";
				return false;
			}
			string scheme = uri.Scheme;
			if (!(scheme == "ws") && !(scheme == "wss"))
			{
				message = "The scheme part is not 'ws' or 'wss'.";
				return false;
			}
			int port = uri.Port;
			if (port == 0)
			{
				message = "The port part is zero.";
				return false;
			}
			if (uri.Fragment.Length > 0)
			{
				message = "It includes the fragment component.";
				return false;
			}
			result = ((port != -1) ? uri : new Uri(string.Format("{0}://{1}:{2}{3}", scheme, uri.Host, (scheme == "ws") ? 80 : 443, uri.PathAndQuery)));
			return true;
		}

		internal static bool TryGetUTF8DecodedString(this byte[] bytes, out string s)
		{
			s = null;
			try
			{
				s = Encoding.UTF8.GetString(bytes);
			}
			catch
			{
				return false;
			}
			return true;
		}

		internal static bool TryGetUTF8EncodedBytes(this string s, out byte[] bytes)
		{
			bytes = null;
			try
			{
				bytes = Encoding.UTF8.GetBytes(s);
			}
			catch
			{
				return false;
			}
			return true;
		}

		internal static bool TryOpenRead(this FileInfo fileInfo, out FileStream fileStream)
		{
			fileStream = null;
			try
			{
				fileStream = fileInfo.OpenRead();
			}
			catch
			{
				return false;
			}
			return true;
		}

		internal static string Unquote(this string value)
		{
			int num = value.IndexOf('"');
			if (num == -1)
			{
				return value;
			}
			int num2 = value.LastIndexOf('"');
			if (num2 == num)
			{
				return value;
			}
			int num3 = num2 - num - 1;
			return (num3 > 0) ? value.Substring(num + 1, num3).Replace("\\\"", "\"") : string.Empty;
		}

		internal static bool Upgrades(this NameValueCollection headers, string protocol)
		{
			StringComparison comparisonTypeForValue = StringComparison.OrdinalIgnoreCase;
			return headers.Contains("Upgrade", protocol, comparisonTypeForValue) && headers.Contains("Connection", "Upgrade", comparisonTypeForValue);
		}

		internal static string UrlDecode(this string value, Encoding encoding)
		{
			return HttpUtility.UrlDecode(value, encoding);
		}

		internal static string UrlEncode(this string value, Encoding encoding)
		{
			return HttpUtility.UrlEncode(value, encoding);
		}

		internal static void WriteBytes(this Stream stream, byte[] bytes, int bufferLength)
		{
			using MemoryStream source = new MemoryStream(bytes);
			CopyTo(source, stream, bufferLength);
		}

		internal static void WriteBytesAsync(this Stream stream, byte[] bytes, int bufferLength, Action completed, Action<Exception> error)
		{
			MemoryStream src = new MemoryStream(bytes);
			src.CopyToAsync(stream, bufferLength, delegate
			{
				if (completed != null)
				{
					completed();
				}
				src.Dispose();
			}, delegate(Exception ex)
			{
				src.Dispose();
				if (error != null)
				{
					error(ex);
				}
			});
		}

		public static string GetDescription(this WebSocketSharp.Net.HttpStatusCode code)
		{
			return ((int)code).GetStatusDescription();
		}

		public static string GetStatusDescription(this int code)
		{
			return code switch
			{
				100 => "Continue", 
				101 => "Switching Protocols", 
				102 => "Processing", 
				200 => "OK", 
				201 => "Created", 
				202 => "Accepted", 
				203 => "Non-Authoritative Information", 
				204 => "No Content", 
				205 => "Reset Content", 
				206 => "Partial Content", 
				207 => "Multi-Status", 
				300 => "Multiple Choices", 
				301 => "Moved Permanently", 
				302 => "Found", 
				303 => "See Other", 
				304 => "Not Modified", 
				305 => "Use Proxy", 
				307 => "Temporary Redirect", 
				400 => "Bad Request", 
				401 => "Unauthorized", 
				402 => "Payment Required", 
				403 => "Forbidden", 
				404 => "Not Found", 
				405 => "Method Not Allowed", 
				406 => "Not Acceptable", 
				407 => "Proxy Authentication Required", 
				408 => "Request Timeout", 
				409 => "Conflict", 
				410 => "Gone", 
				411 => "Length Required", 
				412 => "Precondition Failed", 
				413 => "Request Entity Too Large", 
				414 => "Request-Uri Too Long", 
				415 => "Unsupported Media Type", 
				416 => "Requested Range Not Satisfiable", 
				417 => "Expectation Failed", 
				422 => "Unprocessable Entity", 
				423 => "Locked", 
				424 => "Failed Dependency", 
				500 => "Internal Server Error", 
				501 => "Not Implemented", 
				502 => "Bad Gateway", 
				503 => "Service Unavailable", 
				504 => "Gateway Timeout", 
				505 => "Http Version Not Supported", 
				507 => "Insufficient Storage", 
				_ => string.Empty, 
			};
		}

		public static bool IsCloseStatusCode(this ushort value)
		{
			return value > 999 && value < 5000;
		}

		public static bool IsEnclosedIn(this string value, char c)
		{
			if (value == null)
			{
				return false;
			}
			int length = value.Length;
			if (length < 2)
			{
				return false;
			}
			return value[0] == c && value[length - 1] == c;
		}

		public static bool IsHostOrder(this ByteOrder order)
		{
			return BitConverter.IsLittleEndian == (order == ByteOrder.Little);
		}

		public static bool IsLocal(this IPAddress address)
		{
			if (address == null)
			{
				throw new ArgumentNullException("address");
			}
			if (address.Equals(IPAddress.Any))
			{
				return true;
			}
			if (address.Equals(IPAddress.Loopback))
			{
				return true;
			}
			if (Socket.OSSupportsIPv6)
			{
				if (address.Equals(IPAddress.IPv6Any))
				{
					return true;
				}
				if (address.Equals(IPAddress.IPv6Loopback))
				{
					return true;
				}
			}
			string hostName = Dns.GetHostName();
			IPAddress[] hostAddresses = Dns.GetHostAddresses(hostName);
			IPAddress[] array = hostAddresses;
			foreach (IPAddress obj in array)
			{
				if (address.Equals(obj))
				{
					return true;
				}
			}
			return false;
		}

		public static bool IsNullOrEmpty(this string value)
		{
			return value == null || value.Length == 0;
		}

		public static bool IsPredefinedScheme(this string value)
		{
			if (value == null || value.Length < 2)
			{
				return false;
			}
			switch (value[0])
			{
			case 'h':
				return value == "http" || value == "https";
			case 'w':
				return value == "ws" || value == "wss";
			case 'f':
				return value == "file" || value == "ftp";
			case 'g':
				return value == "gopher";
			case 'm':
				return value == "mailto";
			case 'n':
			{
				char c = value[1];
				return (c != 'e') ? (value == "nntp") : (value == "news" || value == "net.pipe" || value == "net.tcp");
			}
			default:
				return false;
			}
		}

		public static bool MaybeUri(this string value)
		{
			if (value == null)
			{
				return false;
			}
			if (value.Length == 0)
			{
				return false;
			}
			int num = value.IndexOf(':');
			if (num == -1)
			{
				return false;
			}
			if (num >= 10)
			{
				return false;
			}
			string value2 = value.Substring(0, num);
			return value2.IsPredefinedScheme();
		}

		public static T[] SubArray<T>(this T[] array, int startIndex, int length)
		{
			if (array == null)
			{
				throw new ArgumentNullException("array");
			}
			int num = array.Length;
			if (num == 0)
			{
				if (startIndex != 0)
				{
					throw new ArgumentOutOfRangeException("startIndex");
				}
				if (length != 0)
				{
					throw new ArgumentOutOfRangeException("length");
				}
				return array;
			}
			if (startIndex < 0 || startIndex >= num)
			{
				throw new ArgumentOutOfRangeException("startIndex");
			}
			if (length < 0 || length > num - startIndex)
			{
				throw new ArgumentOutOfRangeException("length");
			}
			if (length == 0)
			{
				return new T[0];
			}
			if (length == num)
			{
				return array;
			}
			T[] array2 = new T[length];
			Array.Copy(array, startIndex, array2, 0, length);
			return array2;
		}

		public static T[] SubArray<T>(this T[] array, long startIndex, long length)
		{
			if (array == null)
			{
				throw new ArgumentNullException("array");
			}
			long num = array.LongLength;
			if (num == 0)
			{
				if (startIndex != 0)
				{
					throw new ArgumentOutOfRangeException("startIndex");
				}
				if (length != 0)
				{
					throw new ArgumentOutOfRangeException("length");
				}
				return array;
			}
			if (startIndex < 0 || startIndex >= num)
			{
				throw new ArgumentOutOfRangeException("startIndex");
			}
			if (length < 0 || length > num - startIndex)
			{
				throw new ArgumentOutOfRangeException("length");
			}
			if (length == 0)
			{
				return new T[0];
			}
			if (length == num)
			{
				return array;
			}
			T[] array2 = new T[length];
			Array.Copy(array, startIndex, array2, 0L, length);
			return array2;
		}

		public static void Times(this int n, Action action)
		{
			if (n > 0 && action != null)
			{
				for (int i = 0; i < n; i++)
				{
					action();
				}
			}
		}

		public static void Times(this long n, Action action)
		{
			if (n > 0 && action != null)
			{
				for (long num = 0L; num < n; num++)
				{
					action();
				}
			}
		}

		public static void Times(this uint n, Action action)
		{
			if (n != 0 && action != null)
			{
				for (uint num = 0u; num < n; num++)
				{
					action();
				}
			}
		}

		public static void Times(this ulong n, Action action)
		{
			if (n != 0 && action != null)
			{
				for (ulong num = 0uL; num < n; num++)
				{
					action();
				}
			}
		}

		public static void Times(this int n, Action<int> action)
		{
			if (n > 0 && action != null)
			{
				for (int i = 0; i < n; i++)
				{
					action(i);
				}
			}
		}

		public static void Times(this long n, Action<long> action)
		{
			if (n > 0 && action != null)
			{
				for (long num = 0L; num < n; num++)
				{
					action(num);
				}
			}
		}

		public static void Times(this uint n, Action<uint> action)
		{
			if (n != 0 && action != null)
			{
				for (uint num = 0u; num < n; num++)
				{
					action(num);
				}
			}
		}

		public static void Times(this ulong n, Action<ulong> action)
		{
			if (n != 0 && action != null)
			{
				for (ulong num = 0uL; num < n; num++)
				{
					action(num);
				}
			}
		}

		[Obsolete("This method will be removed.")]
		public static T To<T>(this byte[] source, ByteOrder sourceOrder) where T : struct
		{
			if (source == null)
			{
				throw new ArgumentNullException("source");
			}
			if (source.Length == 0)
			{
				return default(T);
			}
			Type typeFromHandle = typeof(T);
			byte[] value = source.ToHostOrder(sourceOrder);
			return ((object)typeFromHandle == typeof(bool)) ? ((T)(object)BitConverter.ToBoolean(value, 0)) : (((object)typeFromHandle == typeof(char)) ? ((T)(object)BitConverter.ToChar(value, 0)) : (((object)typeFromHandle == typeof(double)) ? ((T)(object)BitConverter.ToDouble(value, 0)) : (((object)typeFromHandle == typeof(short)) ? ((T)(object)BitConverter.ToInt16(value, 0)) : (((object)typeFromHandle == typeof(int)) ? ((T)(object)BitConverter.ToInt32(value, 0)) : (((object)typeFromHandle == typeof(long)) ? ((T)(object)BitConverter.ToInt64(value, 0)) : (((object)typeFromHandle == typeof(float)) ? ((T)(object)BitConverter.ToSingle(value, 0)) : (((object)typeFromHandle == typeof(ushort)) ? ((T)(object)BitConverter.ToUInt16(value, 0)) : (((object)typeFromHandle == typeof(uint)) ? ((T)(object)BitConverter.ToUInt32(value, 0)) : (((object)typeFromHandle == typeof(ulong)) ? ((T)(object)BitConverter.ToUInt64(value, 0)) : default(T))))))))));
		}

		[Obsolete("This method will be removed.")]
		public static byte[] ToByteArray<T>(this T value, ByteOrder order) where T : struct
		{
			Type typeFromHandle = typeof(T);
			byte[] array = (((object)typeFromHandle == typeof(bool)) ? BitConverter.GetBytes((bool)(object)value) : (((object)typeFromHandle != typeof(byte)) ? (((object)typeFromHandle == typeof(char)) ? BitConverter.GetBytes((char)(object)value) : (((object)typeFromHandle == typeof(double)) ? BitConverter.GetBytes((double)(object)value) : (((object)typeFromHandle == typeof(short)) ? BitConverter.GetBytes((short)(object)value) : (((object)typeFromHandle == typeof(int)) ? BitConverter.GetBytes((int)(object)value) : (((object)typeFromHandle == typeof(long)) ? BitConverter.GetBytes((long)(object)value) : (((object)typeFromHandle == typeof(float)) ? BitConverter.GetBytes((float)(object)value) : (((object)typeFromHandle == typeof(ushort)) ? BitConverter.GetBytes((ushort)(object)value) : (((object)typeFromHandle == typeof(uint)) ? BitConverter.GetBytes((uint)(object)value) : (((object)typeFromHandle == typeof(ulong)) ? BitConverter.GetBytes((ulong)(object)value) : WebSocket.EmptyBytes))))))))) : new byte[1] { (byte)(object)value }));
			if (array.Length > 1 && !order.IsHostOrder())
			{
				Array.Reverse((Array)array);
			}
			return array;
		}

		public static byte[] ToHostOrder(this byte[] source, ByteOrder sourceOrder)
		{
			if (source == null)
			{
				throw new ArgumentNullException("source");
			}
			if (source.Length < 2)
			{
				return source;
			}
			if (sourceOrder.IsHostOrder())
			{
				return source;
			}
			return source.Reverse();
		}

		public static string ToString<T>(this T[] array, string separator)
		{
			if (array == null)
			{
				throw new ArgumentNullException("array");
			}
			int num = array.Length;
			if (num == 0)
			{
				return string.Empty;
			}
			if (separator == null)
			{
				separator = string.Empty;
			}
			StringBuilder stringBuilder = new StringBuilder(64);
			int num2 = num - 1;
			for (int i = 0; i < num2; i++)
			{
				stringBuilder.AppendFormat("{0}{1}", array[i], separator);
			}
			stringBuilder.Append(array[num2].ToString());
			return stringBuilder.ToString();
		}

		public static Uri ToUri(this string value)
		{
			Uri.TryCreate(value, value.MaybeUri() ? UriKind.Absolute : UriKind.Relative, out Uri result);
			return result;
		}

		[Obsolete("This method will be removed.")]
		public static void WriteContent(this WebSocketSharp.Net.HttpListenerResponse response, byte[] content)
		{
			if (response == null)
			{
				throw new ArgumentNullException("response");
			}
			if (content == null)
			{
				throw new ArgumentNullException("content");
			}
			long num = content.LongLength;
			if (num == 0)
			{
				response.Close();
				return;
			}
			response.ContentLength64 = num;
			Stream outputStream = response.OutputStream;
			if (num <= int.MaxValue)
			{
				outputStream.Write(content, 0, (int)num);
			}
			else
			{
				outputStream.WriteBytes(content, 1024);
			}
			outputStream.Close();
		}
	}
	public class MessageEventArgs : EventArgs
	{
		private string _data;

		private bool _dataSet;

		private Opcode _opcode;

		private byte[] _rawData;

		internal Opcode Opcode => _opcode;

		public string Data
		{
			get
			{
				setData();
				return _data;
			}
		}

		public bool IsBinary => _opcode == Opcode.Binary;

		public bool IsPing => _opcode == Opcode.Ping;

		public bool IsText => _opcode == Opcode.Text;

		public byte[] RawData
		{
			get
			{
				setData();
				return _rawData;
			}
		}

		internal MessageEventArgs(WebSocketFrame frame)
		{
			_opcode = frame.Opcode;
			_rawData = frame.PayloadData.ApplicationData;
		}

		internal MessageEventArgs(Opcode opcode, byte[] rawData)
		{
			if ((ulong)rawData.LongLength > PayloadData.MaxLength)
			{
				throw new WebSocketException(CloseStatusCode.TooBig);
			}
			_opcode = opcode;
			_rawData = rawData;
		}

		private void setData()
		{
			if (_dataSet)
			{
				return;
			}
			if (_opcode == Opcode.Binary)
			{
				_dataSet = true;
				return;
			}
			if (_rawData.TryGetUTF8DecodedString(out var s))
			{
				_data = s;
			}
			_dataSet = true;
		}
	}
	public class CloseEventArgs : EventArgs
	{
		private bool _clean;

		private PayloadData _payloadData;

		public ushort Code => _payloadData.Code;

		public string Reason => _payloadData.Reason;

		public bool WasClean => _clean;

		internal CloseEventArgs(PayloadData payloadData, bool clean)
		{
			_payloadData = payloadData;
			_clean = clean;
		}

		internal CloseEventArgs(ushort code, string reason, bool clean)
		{
			_payloadData = new PayloadData(code, reason);
			_clean = clean;
		}
	}
	public enum ByteOrder
	{
		Little,
		Big
	}
	public class ErrorEventArgs : EventArgs
	{
		private Exception _exception;

		private string _message;

		public Exception Exception => _exception;

		public string Message => _message;

		internal ErrorEventArgs(string message)
			: this(message, null)
		{
		}

		internal ErrorEventArgs(string message, Exception exception)
		{
			_message = message;
			_exception = exception;
		}
	}
	public class WebSocket : IDisposable
	{
		private AuthenticationChallenge _authChallenge;

		private string _base64Key;

		private bool _client;

		private Action _closeContext;

		private CompressionMethod _compression;

		private WebSocketContext _context;

		private WebSocketSharp.Net.CookieCollection _cookies;

		private WebSocketSharp.Net.NetworkCredential _credentials;

		private bool _emitOnPing;

		private bool _enableRedirection;

		private string _extensions;

		private bool _extensionsRequested;

		private object _forMessageEventQueue;

		private object _forPing;

		private object _forSend;

		private object _forState;

		private MemoryStream _fragmentsBuffer;

		private bool _fragmentsCompressed;

		private Opcode _fragmentsOpcode;

		private const string _guid = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";

		private Func<WebSocketContext, string> _handshakeRequestChecker;

		private bool _ignoreExtensions;

		private bool _inContinuation;

		private volatile bool _inMessage;

		private volatile Logger _logger;

		private static readonly int _maxRetryCountForConnect;

		private Action<MessageEventArgs> _message;

		private Queue<MessageEventArgs> _messageEventQueue;

		private uint _nonceCount;

		private string _origin;

		private ManualResetEvent _pongReceived;

		private bool _preAuth;

		private string _protocol;

		private string[] _protocols;

		private bool _protocolsRequested;

		private WebSocketSharp.Net.NetworkCredential _proxyCredentials;

		private Uri _proxyUri;

		private volatile WebSocketState _readyState;

		private ManualResetEvent _receivingExited;

		private int _retryCountForConnect;

		private bool _secure;

		private ClientSslConfiguration _sslConfig;

		private Stream _stream;

		private TcpClient _tcpClient;

		private Uri _uri;

		private const string _version = "13";

		private TimeSpan _waitTime;

		internal static readonly byte[] EmptyBytes;

		internal static readonly int FragmentLength;

		internal static readonly RandomNumberGenerator RandomNumber;

		internal WebSocketSharp.Net.CookieCollection CookieCollection => _cookies;

		internal Func<WebSocketContext, string> CustomHandshakeRequestChecker
		{
			get
			{
				return _handshakeRequestChecker;
			}
			set
			{
				_handshakeRequestChecker = value;
			}
		}

		internal bool HasMessage
		{
			get
			{
				lock (_forMessageEventQueue)
				{
					return _messageEventQueue.Count > 0;
				}
			}
		}

		internal bool IgnoreExtensions
		{
			get
			{
				return _ignoreExtensions;
			}
			set
			{
				_ignoreExtensions = value;
			}
		}

		internal bool IsConnected => _readyState == WebSocketState.Open || _readyState == WebSocketState.Closing;

		public CompressionMethod Compression
		{
			get
			{
				return _compression;
			}
			set
			{
				string text = null;
				if (!_client)
				{
					text = "This instance is not a client.";
					throw new InvalidOperationException(text);
				}
				if (!canSet(out text))
				{
					_logger.Warn(text);
					return;
				}
				lock (_forState)
				{
					if (!canSet(out text))
					{
						_logger.Warn(text);
					}
					else
					{
						_compression = value;
					}
				}
			}
		}

		public IEnumerable<WebSocketSharp.Net.Cookie> Cookies
		{
			get
			{
				lock (_cookies.SyncRoot)
				{
					foreach (WebSocketSharp.Net.Cookie cookie in _cookies)
					{
						yield return cookie;
					}
				}
			}
		}

		public WebSocketSharp.Net.NetworkCredential Credentials => _credentials;

		public bool EmitOnPing
		{
			get
			{
				return _emitOnPing;
			}
			set
			{
				_emitOnPing = value;
			}
		}

		public bool EnableRedirection
		{
			get
			{
				return _enableRedirection;
			}
			set
			{
				string text = null;
				if (!_client)
				{
					text = "This instance is not a client.";
					throw new InvalidOperationException(text);
				}
				if (!canSet(out text))
				{
					_logger.Warn(text);
					return;
				}
				lock (_forState)
				{
					if (!canSet(out text))
					{
						_logger.Warn(text);
					}
					else
					{
						_enableRedirection = value;
					}
				}
			}
		}

		public string Extensions => _extensions ?? string.Empty;

		public bool IsAlive => ping(EmptyBytes);

		public bool IsSecure => _secure;

		public Logger Log
		{
			get
			{
				return _logger;
			}
			internal set
			{
				_logger = value;
			}
		}

		public string Origin
		{
			get
			{
				return _origin;
			}
			set
			{
				string text = null;
				if (!_client)
				{
					text = "This instance is not a client.";
					throw new InvalidOperationException(text);
				}
				if (!value.IsNullOrEmpty())
				{
					if (!Uri.TryCreate(value, UriKind.Absolute, out Uri result))
					{
						text = "Not an absolute URI string.";
						throw new ArgumentException(text, "value");
					}
					if (result.Segments.Length > 1)
					{
						text = "It includes the path segments.";
						throw new ArgumentException(text, "value");
					}
				}
				if (!canSet(out text))
				{
					_logger.Warn(text);
					return;
				}
				lock (_forState)
				{
					if (!canSet(out text))
					{
						_logger.Warn(text);
						return;
					}
					_origin = ((!value.IsNullOrEmpty()) ? value.TrimEnd(new char[1] { '/' }) : value);
				}
			}
		}

		public string Protocol
		{
			get
			{
				return _protocol ?? string.Empty;
			}
			internal set
			{
				_protocol = value;
			}
		}

		public WebSocketState ReadyState => _readyState;

		public ClientSslConfiguration SslConfiguration
		{
			get
			{
				if (!_client)
				{
					string text = "This instance is not a client.";
					throw new InvalidOperationException(text);
				}
				if (!_secure)
				{
					string text2 = "This instance does not use a secure connection.";
					throw new InvalidOperationException(text2);
				}
				return getSslConfiguration();
			}
		}

		public Uri Url => _client ? _uri : _context.RequestUri;

		public TimeSpan WaitTime
		{
			get
			{
				return _waitTime;
			}
			set
			{
				if (value <= TimeSpan.Zero)
				{
					throw new ArgumentOutOfRangeException("value", "Zero or less.");
				}
				if (!canSet(out var text))
				{
					_logger.Warn(text);
					return;
				}
				lock (_forState)
				{
					if (!canSet(out text))
					{
						_logger.Warn(text);
					}
					else
					{
						_waitTime = value;
					}
				}
			}
		}

		public event EventHandler<CloseEventArgs> OnClose;

		public event EventHandler<ErrorEventArgs> OnError;

		public event EventHandler<MessageEventArgs> OnMessage;

		public event EventHandler OnOpen;

		static WebSocket()
		{
			_maxRetryCountForConnect = 10;
			EmptyBytes = new byte[0];
			FragmentLength = 1016;
			RandomNumber = new RNGCryptoServiceProvider();
		}

		internal WebSocket(HttpListenerWebSocketContext context, string protocol)
		{
			_context = context;
			_protocol = protocol;
			_closeContext = context.Close;
			_logger = context.Log;
			_message = messages;
			_secure = context.IsSecureConnection;
			_stream = context.Stream;
			_waitTime = TimeSpan.FromSeconds(1.0);
			init();
		}

		internal WebSocket(TcpListenerWebSocketContext context, string protocol)
		{
			_context = context;
			_protocol = protocol;
			_closeContext = context.Close;
			_logger = context.Log;
			_message = messages;
			_secure = context.IsSecureConnection;
			_stream = context.Stream;
			_waitTime = TimeSpan.FromSeconds(1.0);
			init();
		}

		public WebSocket(string url, params string[] protocols)
		{
			if (url == null)
			{
				throw new ArgumentNullException("url");
			}
			if (url.Length == 0)
			{
				throw new ArgumentException("An empty string.", "url");
			}
			if (!url.TryCreateWebSocketUri(out _uri, out var text))
			{
				throw new ArgumentException(text, "url");
			}
			if (protocols != null && protocols.Length != 0)
			{
				if (!checkProtocols(protocols, out text))
				{
					throw new ArgumentException(text, "protocols");
				}
				_protocols = protocols;
			}
			_base64Key = CreateBase64Key();
			_client = true;
			_logger = new Logger();
			_message = messagec;
			_secure = _uri.Scheme == "wss";
			_waitTime = TimeSpan.FromSeconds(5.0);
			init();
		}

		private bool accept()
		{
			if (_readyState == WebSocketState.Open)
			{
				string text = "The handshake request has already been accepted.";
				_logger.Warn(text);
				return false;
			}
			lock (_forState)
			{
				if (_readyState == WebSocketState.Open)
				{
					string text2 = "The handshake request has already been accepted.";
					_logger.Warn(text2);
					return false;
				}
				if (_readyState == WebSocketState.Closing)
				{
					string text3 = "The close process has set in.";
					_logger.Error(text3);
					text3 = "An interruption has occurred while attempting to accept.";
					error(text3, null);
					return false;
				}
				if (_readyState == WebSocketState.Closed)
				{
					string text4 = "The connection has been closed.";
					_logger.Error(text4);
					text4 = "An interruption has occurred while attempting to accept.";
					error(text4, null);
					return false;
				}
				try
				{
					if (!acceptHandshake())
					{
						return false;
					}
				}
				catch (Exception ex)
				{
					_logger.Fatal(ex.Message);
					_logger.Debug(ex.ToString());
					string text5 = "An exception has occurred while attempting to accept.";
					fatal(text5, ex);
					return false;
				}
				_readyState = WebSocketState.Open;
				return true;
			}
		}

		private bool acceptHandshake()
		{
			_logger.Debug($"A handshake request from {_context.UserEndPoint}:\n{_context}");
			if (!checkHandshakeRequest(_context, out var text))
			{
				_logger.Error(text);
				refuseHandshake(CloseStatusCode.ProtocolError, "A handshake error has occurred while attempting to accept.");
				return false;
			}
			if (!customCheckHandshakeRequest(_context, out text))
			{
				_logger.Error(text);
				refuseHandshake(CloseStatusCode.PolicyViolation, "A handshake error has occurred while attempting to accept.");
				return false;
			}
			_base64Key = _context.Headers["Sec-WebSocket-Key"];
			if (_protocol != null)
			{
				IEnumerable<string> secWebSocketProtocols = _context.SecWebSocketProtocols;
				processSecWebSocketProtocolClientHeader(secWebSocketProtocols);
			}
			if (!_ignoreExtensions)
			{
				string value = _context.Headers["Sec-WebSocket-Extensions"];
				processSecWebSocketExtensionsClientHeader(value);
			}
			return sendHttpResponse(createHandshakeResponse());
		}

		private bool canSet(out string message)
		{
			message = null;
			if (_readyState == WebSocketState.Open)
			{
				message = "The connection has already been established.";
				return false;
			}
			if (_readyState == WebSocketState.Closing)
			{
				message = "The connection is closing.";
				return false;
			}
			return true;
		}

		private bool checkHandshakeRequest(WebSocketContext context, out string message)
		{
			message = null;
			if (!context.IsWebSocketRequest)
			{
				message = "Not a handshake request.";
				return false;
			}
			if (context.RequestUri == null)
			{
				message = "It specifies an invalid Request-URI.";
				return false;
			}
			NameValueCollection headers = context.Headers;
			string text = headers["Sec-WebSocket-Key"];
			if (text == null)
			{
				message = "It includes no Sec-WebSocket-Key header.";
				return false;
			}
			if (text.Length == 0)
			{
				message = "It includes an invalid Sec-WebSocket-Key header.";
				return false;
			}
			string text2 = headers["Sec-WebSocket-Version"];
			if (text2 == null)
			{
				message = "It includes no Sec-WebSocket-Version header.";
				return false;
			}
			if (text2 != "13")
			{
				message = "It includes an invalid Sec-WebSocket-Version header.";
				return false;
			}
			string text3 = headers["Sec-WebSocket-Protocol"];
			if (text3 != null && text3.Length == 0)
			{
				message = "It includes an invalid Sec-WebSocket-Protocol header.";
				return false;
			}
			if (!_ignoreExtensions)
			{
				string text4 = headers["Sec-WebSocket-Extensions"];
				if (text4 != null && text4.Length == 0)
				{
					message = "It includes an invalid Sec-WebSocket-Extensions header.";
					return false;
				}
			}
			return true;
		}

		private bool checkHandshakeResponse(HttpResponse response, out string message)
		{
			message = null;
			if (response.IsRedirect)
			{
				message = "Indicates the redirection.";
				return false;
			}
			if (response.IsUnauthorized)
			{
				message = "Requires the authentication.";
				return false;
			}
			if (!response.IsWebSocketResponse)
			{
				message = "Not a WebSocket handshake response.";
				return false;
			}
			NameValueCollection headers = response.Headers;
			if (!validateSecWebSocketAcceptHeader(headers["Sec-WebSocket-Accept"]))
			{
				message = "Includes no Sec-WebSocket-Accept header, or it has an invalid value.";
				return false;
			}
			if (!validateSecWebSocketProtocolServerHeader(headers["Sec-WebSocket-Protocol"]))
			{
				message = "Includes no Sec-WebSocket-Protocol header, or it has an invalid value.";
				return false;
			}
			if (!validateSecWebSocketExtensionsServerHeader(headers["Sec-WebSocket-Extensions"]))
			{
				message = "Includes an invalid Sec-WebSocket-Extensions header.";
				return false;
			}
			if (!validateSecWebSocketVersionServerHeader(headers["Sec-WebSocket-Version"]))
			{
				message = "Includes an invalid Sec-WebSocket-Version header.";
				return false;
			}
			return true;
		}

		private static bool checkProtocols(string[] protocols, out string message)
		{
			message = null;
			Func<string, bool> condition = (string protocol) => protocol.IsNullOrEmpty() || !protocol.IsToken();
			if (protocols.Contains(condition))
			{
				message = "It contains a value that is not a token.";
				return false;
			}
			if (protocols.ContainsTwice())
			{
				message = "It contains a value twice.";
				return false;
			}
			return true;
		}

		private bool checkReceivedFrame(WebSocketFrame frame, out string message)
		{
			message = null;
			bool isMasked = frame.IsMasked;
			if (_client && isMasked)
			{
				message = "A frame from the server is masked.";
				return false;
			}
			if (!_client && !isMasked)
			{
				message = "A frame from a client is not masked.";
				return false;
			}
			if (_inContinuation && frame.IsData)
			{
				message = "A data frame has been received while receiving continuation frames.";
				return false;
			}
			if (frame.IsCompressed && _compression == CompressionMethod.None)
			{
				message = "A compressed frame has been received without any agreement for it.";
				return false;
			}
			if (frame.Rsv2 == Rsv.On)
			{
				message = "The RSV2 of a frame is non-zero without any negotiation for it.";
				return false;
			}
			if (frame.Rsv3 == Rsv.On)
			{
				message = "The RSV3 of a frame is non-zero without any negotiation for it.";
				return false;
			}
			return true;
		}

		private void close(ushort code, string reason)
		{
			if (_readyState == WebSocketState.Closing)
			{
				_logger.Info("The closing is already in progress.");
				return;
			}
			if (_readyState == WebSocketState.Closed)
			{
				_logger.Info("The connection has already been closed.");
				return;
			}
			if (code == 1005)
			{
				close(PayloadData.Empty, send: true, receive: true, received: false);
				return;
			}
			bool receive = !code.IsReserved();
			close(new PayloadData(code, reason), receive, receive, received: false);
		}

		private void close(PayloadData payloadData, bool send, bool receive, bool received)
		{
			lock (_forState)
			{
				if (_readyState == WebSocketState.Closing)
				{
					_logger.Info("The closing is already in progress.");
					return;
				}
				if (_readyState == WebSocketState.Closed)
				{
					_logger.Info("The connection has already been closed.");
					return;
				}
				send = send && _readyState == WebSocketState.Open;
				receive = send && receive;
				_readyState = WebSocketState.Closing;
			}
			_logger.Trace("Begin closing the connection.");
			bool clean = closeHandshake(payloadData, send, receive, received);
			releaseResources();
			_logger.Trace("End closing the connection.");
			_readyState = WebSocketState.Closed;
			CloseEventArgs e = new CloseEventArgs(payloadData, clean);
			try
			{
				this.OnClose.Emit(this, e);
			}
			catch (Exception ex)
			{
				_logger.Error(ex.Message);
				_logger.Debug(ex.ToString());
			}
		}

		private void closeAsync(ushort code, string reason)
		{
			if (_readyState == WebSocketState.Closing)
			{
				_logger.Info("The closing is already in progress.");
				return;
			}
			if (_readyState == WebSocketState.Closed)
			{
				_logger.Info("The connection has already been closed.");
				return;
			}
			if (code == 1005)
			{
				closeAsync(PayloadData.Empty, send: true, receive: true, received: false);
				return;
			}
			bool receive = !code.IsReserved();
			closeAsync(new PayloadData(code, reason), receive, receive, received: false);
		}

		private void closeAsync(PayloadData payloadData, bool send, bool receive, bool received)
		{
			Action<PayloadData, bool, bool, bool> closer = close;
			closer.BeginInvoke(payloadData, send, receive, received, delegate(IAsyncResult ar)
			{
				closer.EndInvoke(ar);
			}, null);
		}

		private bool closeHandshake(byte[] frameAsBytes, bool receive, bool received)
		{
			bool flag = frameAsBytes != null && sendBytes(frameAsBytes);
			if (!received && flag && receive && _receivingExited != null)
			{
				received = _receivingExited.WaitOne(_waitTime);
			}
			bool flag2 = flag && received;
			_logger.Debug($"Was clean?: {flag2}\n  sent: {flag}\n  received: {received}");
			return flag2;
		}

		private bool closeHandshake(PayloadData payloadData, bool send, bool receive, bool received)
		{
			bool flag = false;
			if (send)
			{
				WebSocketFrame webSocketFrame = WebSocketFrame.CreateCloseFrame(payloadData, _client);
				flag = sendBytes(webSocketFrame.ToArray());
				if (_client)
				{
					webSocketFrame.Unmask();
				}
			}
			if (!received && flag && receive && _receivingExited != null)
			{
				received = _receivingExited.WaitOne(_waitTime);
			}
			bool flag2 = flag && received;
			_logger.Debug($"Was clean?: {flag2}\n  sent: {flag}\n  received: {received}");
			return flag2;
		}

		private bool connect()
		{
			if (_readyState == WebSocketState.Open)
			{
				string text = "The connection has already been established.";
				_logger.Warn(text);
				return false;
			}
			lock (_forState)
			{
				if (_readyState == WebSocketState.Open)
				{
					string text2 = "The connection has already been established.";
					_logger.Warn(text2);
					return false;
				}
				if (_readyState == WebSocketState.Closing)
				{
					string text3 = "The close process has set in.";
					_logger.Error(text3);
					text3 = "An interruption has occurred while attempting to connect.";
					error(text3, null);
					return false;
				}
				if (_retryCountForConnect > _maxRetryCountForConnect)
				{
					string text4 = "An opportunity for reconnecting has been lost.";
					_logger.Error(text4);
					text4 = "An interruption has occurred while attempting to connect.";
					error(text4, null);
					return false;
				}
				_readyState = WebSocketState.Connecting;
				try
				{
					doHandshake();
				}
				catch (Exception ex)
				{
					_retryCountForConnect++;
					_logger.Fatal(ex.Message);
					_logger.Debug(ex.ToString());
					string text5 = "An exception has occurred while attempting to connect.";
					fatal(text5, ex);
					return false;
				}
				_retryCountForConnect = 1;
				_readyState = WebSocketState.Open;
				return true;
			}
		}

		private string createExtensions()
		{
			StringBuilder stringBuilder = new StringBuilder(80);
			if (_compression != 0)
			{
				string arg = _compression.ToExtensionString("server_no_context_takeover", "client_no_context_takeover");
				stringBuilder.AppendFormat("{0}, ", arg);
			}
			int length = stringBuilder.Length;
			if (length > 2)
			{
				stringBuilder.Length = length - 2;
				return stringBuilder.ToString();
			}
			return null;
		}

		private HttpResponse createHandshakeFailureResponse(WebSocketSharp.Net.HttpStatusCode code)
		{
			HttpResponse httpResponse = HttpResponse.CreateCloseResponse(code);
			httpResponse.Headers["Sec-WebSocket-Version"] = "13";
			return httpResponse;
		}

		private HttpRequest createHandshakeRequest()
		{
			HttpRequest httpRequest = HttpRequest.CreateWebSocketRequest(_uri);
			NameValueCollection headers = httpRequest.Headers;
			if (!_origin.IsNullOrEmpty())
			{
				headers["Origin"] = _origin;
			}
			headers["Sec-WebSocket-Key"] = _base64Key;
			_protocolsRequested = _protocols != null;
			if (_protocolsRequested)
			{
				headers["Sec-WebSocket-Protocol"] = _protocols.ToString(", ");
			}
			_extensionsRequested = _compression != CompressionMethod.None;
			if (_extensionsRequested)
			{
				headers["Sec-WebSocket-Extensions"] = createExtensions();
			}
			headers["Sec-WebSocket-Version"] = "13";
			AuthenticationResponse authenticationResponse = null;
			if (_authChallenge != null && _credentials != null)
			{
				authenticationResponse = new AuthenticationResponse(_authChallenge, _credentials, _nonceCount);
				_nonceCount = authenticationResponse.NonceCount;
			}
			else if (_preAuth)
			{
				authenticationResponse = new AuthenticationResponse(_credentials);
			}
			if (authenticationResponse != null)
			{
				headers["Authorization"] = authenticationResponse.ToString();
			}
			if (_cookies.Count > 0)
			{
				httpRequest.SetCookies(_cookies);
			}
			return httpRequest;
		}

		private HttpResponse createHandshakeResponse()
		{
			HttpResponse httpResponse = HttpResponse.CreateWebSocketResponse();
			NameValueCollection headers = httpResponse.Headers;
			headers["Sec-WebSocket-Accept"] = CreateResponseKey(_base64Key);
			if (_protocol != null)
			{
				headers["Sec-WebSocket-Protocol"] = _protocol;
			}
			if (_extensions != null)
			{
				headers["Sec-WebSocket-Extensions"] = _extensions;
			}
			if (_cookies.Count > 0)
			{
				httpResponse.SetCookies(_cookies);
			}
			return httpResponse;
		}

		private bool customCheckHandshakeRequest(WebSocketContext context, out string message)
		{
			message = null;
			if (_handshakeRequestChecker == null)
			{
				return true;
			}
			message = _handshakeRequestChecker(context);
			return message == null;
		}

		private MessageEventArgs dequeueFromMessageEventQueue()
		{
			lock (_forMessageEventQueue)
			{
				return (_messageEventQueue.Count > 0) ? _messageEventQueue.Dequeue() : null;
			}
		}

		private void doHandshake()
		{
			setClientStream();
			HttpResponse httpResponse = sendHandshakeRequest();
			if (!checkHandshakeResponse(httpResponse, out var text))
			{
				throw new WebSocketException(CloseStatusCode.ProtocolError, text);
			}
			if (_protocolsRequested)
			{
				_protocol = httpResponse.Headers["Sec-WebSocket-Protocol"];
			}
			if (_extensionsRequested)
			{
				processSecWebSocketExtensionsServerHeader(httpResponse.Headers["Sec-WebSocket-Extensions"]);
			}
			processCookies(httpResponse.Cookies);
		}

		private void enqueueToMessageEventQueue(MessageEventArgs e)
		{
			lock (_forMessageEventQueue)
			{
				_messageEventQueue.Enqueue(e);
			}
		}

		private void error(string message, Exception exception)
		{
			try
			{
				this.OnError.Emit(this, new ErrorEventArgs(message, exception));
			}
			catch (Exception ex)
			{
				_logger.Error(ex.Message);
				_logger.Debug(ex.ToString());
			}
		}

		private void fatal(string message, Exception exception)
		{
			CloseStatusCode code = ((exception is WebSocketException) ? ((WebSocketException)exception).Code : CloseStatusCode.Abnormal);
			fatal(message, (ushort)code);
		}

		private void fatal(string message, ushort code)
		{
			PayloadData payloadData = new PayloadData(code, message);
			close(payloadData, !code.IsReserved(), receive: false, received: false);
		}

		private void fatal(string message, CloseStatusCode code)
		{
			fatal(message, (ushort)code);
		}

		private ClientSslConfiguration getSslConfiguration()
		{
			if (_sslConfig == null)
			{
				_sslConfig = new ClientSslConfiguration(_uri.DnsSafeHost);
			}
			return _sslConfig;
		}

		private void init()
		{
			_compression = CompressionMethod.None;
			_cookies = new WebSocketSharp.Net.CookieCollection();
			_forPing = new object();
			_forSend = new object();
			_forState = new object();
			_messageEventQueue = new Queue<MessageEventArgs>();
			_forMessageEventQueue = ((ICollection)_messageEventQueue).SyncRoot;
			_readyState = WebSocketState.Connecting;
		}

		private void message()
		{
			MessageEventArgs obj = null;
			lock (_forMessageEventQueue)
			{
				if (_inMessage || _messageEventQueue.Count == 0 || _readyState != WebSocketState.Open)
				{
					return;
				}
				_inMessage = true;
				obj = _messageEventQueue.Dequeue();
			}
			_message(obj);
		}

		private void messagec(MessageEventArgs e)
		{
			while (true)
			{
				try
				{
					this.OnMessage.Emit(this, e);
				}
				catch (Exception ex)
				{
					_logger.Error(ex.ToString());
					error("An error has occurred during an OnMessage event.", ex);
				}
				lock (_forMessageEventQueue)
				{
					if (_messageEventQueue.Count == 0 || _readyState != WebSocketState.Open)
					{
						_inMessage = false;
						break;
					}
					e = _messageEventQueue.Dequeue();
				}
				bool flag = true;
			}
		}

		private void messages(MessageEventArgs e)
		{
			try
			{
				this.OnMessage.Emit(this, e);
			}
			catch (Exception ex)
			{
				_logger.Error(ex.ToString());
				error("An error has occurred during an OnMessage event.", ex);
			}
			lock (_forMessageEventQueue)
			{
				if (_messageEventQueue.Count == 0 || _readyState != WebSocketState.Open)
				{
					_inMessage = false;
					return;
				}
				e = _messageEventQueue.Dequeue();
			}
			ThreadPool.QueueUserWorkItem(delegate
			{
				messages(e);
			});
		}

		private void open()
		{
			_inMessage = true;
			startReceiving();
			try
			{
				this.OnOpen.Emit(this, EventArgs.Empty);
			}
			catch (Exception ex)
			{
				_logger.Error(ex.ToString());
				error("An error has occurred during the OnOpen event.", ex);
			}
			MessageEventArgs obj = null;
			lock (_forMessageEventQueue)
			{
				if (_messageEventQueue.Count == 0 || _readyState != WebSocketState.Open)
				{
					_inMessage = false;
					return;
				}
				obj = _messageEventQueue.Dequeue();
			}
			_message.BeginInvoke(obj, delegate(IAsyncResult ar)
			{
				_message.EndInvoke(ar);
			}, null);
		}

		private bool ping(byte[] data)
		{
			if (_readyState != WebSocketState.Open)
			{
				return false;
			}
			ManualResetEvent pongReceived = _pongReceived;
			if (pongReceived == null)
			{
				return false;
			}
			lock (_forPing)
			{
				try
				{
					pongReceived.Reset();
					if (!send(Fin.Final, Opcode.Ping, data, compressed: false))
					{
						return false;
					}
					return pongReceived.WaitOne(_waitTime);
				}
				catch (ObjectDisposedException)
				{
					return false;
				}
			}
		}

		private bool processCloseFrame(WebSocketFrame frame)
		{
			PayloadData payloadData = frame.PayloadData;
			close(payloadData, !payloadData.HasReservedCode, receive: false, received: true);
			return false;
		}

		private void processCookies(WebSocketSharp.Net.CookieCollection cookies)
		{
			if (cookies.Count != 0)
			{
				_cookies.SetOrRemove(cookies);
			}
		}

		private bool processDataFrame(WebSocketFrame frame)
		{
			enqueueToMessageEventQueue(frame.IsCompressed ? new MessageEventArgs(frame.Opcode, frame.PayloadData.ApplicationData.Decompress(_compression)) : new MessageEventArgs(frame));
			return true;
		}

		private bool processFragmentFrame(WebSocketFrame frame)
		{
			if (!_inContinuation)
			{
				if (frame.IsContinuation)
				{
					return true;
				}
				_fragmentsOpcode = frame.Opcode;
				_fragmentsCompressed = frame.IsCompressed;
				_fragmentsBuffer = new MemoryStream();
				_inContinuation = true;
			}
			_fragmentsBuffer.WriteBytes(frame.PayloadData.ApplicationData, 1024);
			if (frame.IsFinal)
			{
				using (_fragmentsBuffer)
				{
					byte[] rawData = (_fragmentsCompressed ? _fragmentsBuffer.DecompressToArray(_compression) : _fragmentsBuffer.ToArray());
					enqueueToMessageEventQueue(new MessageEventArgs(_fragmentsOpcode, rawData));
				}
				_fragmentsBuffer = null;
				_inContinuation = false;
			}
			return true;
		}

		private bool processPingFrame(WebSocketFrame frame)
		{
			_logger.Trace("A ping was received.");
			WebSocketFrame webSocketFrame = WebSocketFrame.CreatePongFrame(frame.PayloadData, _client);
			lock (_forState)
			{
				if (_readyState != WebSocketState.Open)
				{
					_logger.Error("The connection is closing.");
					return true;
				}
				if (!sendBytes(webSocketFrame.ToArray()))
				{
					return false;
				}
			}
			_logger.Trace("A pong to this ping has been sent.");
			if (_emitOnPing)
			{
				if (_client)
				{
					webSocketFrame.Unmask();
				}
				enqueueToMessageEventQueue(new MessageEventArgs(frame));
			}
			return true;
		}

		private bool processPongFrame(WebSocketFrame frame)
		{
			_logger.Trace("A pong was received.");
			try
			{
				_pongReceived.Set();
			}
			catch (NullReferenceException ex)
			{
				_logger.Error(ex.Message);
				_logger.Debug(ex.ToString());
				return false;
			}
			catch (ObjectDisposedException ex2)
			{
				_logger.Error(ex2.Message);
				_logger.Debug(ex2.ToString());
				return false;
			}
			_logger.Trace("It has been signaled.");
			return true;
		}

		private bool processReceivedFrame(WebSocketFrame frame)
		{
			if (!checkReceivedFrame(frame, out var text))
			{
				throw new WebSocketException(CloseStatusCode.ProtocolError, text);
			}
			frame.Unmask();
			return frame.IsFragment ? processFragmentFrame(frame) : (frame.IsData ? processDataFrame(frame) : (frame.IsPing ? processPingFrame(frame) : (frame.IsPong ? processPongFrame(frame) : (frame.IsClose ? processCloseFrame(frame) : processUnsupportedFrame(frame)))));
		}

		private void processSecWebSocketExtensionsClientHeader(string value)
		{
			if (value == null)
			{
				return;
			}
			StringBuilder stringBuilder = new StringBuilder(80);
			bool flag = false;
			foreach (string item in value.SplitHeaderValue(','))
			{
				string text = item.Trim();
				if (text.Length != 0 && !flag && text.IsCompressionExtension(CompressionMethod.Deflate))
				{
					_compression = CompressionMethod.Deflate;
					stringBuilder.AppendFormat("{0}, ", _compression.ToExtensionString("client_no_context_takeover", "server_no_context_takeover"));
					flag = true;
				}
			}
			int length = stringBuilder.Length;
			if (length > 2)
			{
				stringBuilder.Length = length - 2;
				_extensions = stringBuilder.ToString();
			}
		}

		private void processSecWebSocketExtensionsServerHeader(string value)
		{
			if (value == null)
			{
				_compression = CompressionMethod.None;
			}
			else
			{
				_extensions = value;
			}
		}

		private void processSecWebSocketProtocolClientHeader(IEnumerable<string> values)
		{
			if (!values.Contains((string val) => val == _protocol))
			{
				_protocol = null;
			}
		}

		private bool processUnsupportedFrame(WebSocketFrame frame)
		{
			_logger.Fatal("An unsupported frame:" + frame.PrintToString(dumped: false));
			fatal("There is no way to handle it.", CloseStatusCode.PolicyViolation);
			return false;
		}

		private void refuseHandshake(CloseStatusCode code, string reason)
		{
			_readyState = WebSocketState.Closing;
			HttpResponse response = createHandshakeFailureResponse(WebSocketSharp.Net.HttpStatusCode.BadRequest);
			sendHttpResponse(response);
			releaseServerResources();
			_readyState = WebSocketState.Closed;
			CloseEventArgs e = new CloseEventArgs((ushort)code, reason, clean: false);
			try
			{
				this.OnClose.Emit(this, e);
			}
			catch (Exception ex)
			{
				_logger.Error(ex.Message);
				_logger.Debug(ex.ToString());
			}
		}

		private void releaseClientResources()
		{
			if (_stream != null)
			{
				_stream.Dispose();
				_stream = null;
			}
			if (_tcpClient != null)
			{
				_tcpClient.Close();
				_tcpClient = null;
			}
		}

		private void releaseCommonResources()
		{
			if (_fragmentsBuffer != null)
			{
				_fragmentsBuffer.Dispose();
				_fragmentsBuffer = null;
				_inContinuation = false;
			}
			if (_pongReceived != null)
			{
				_pongReceived.Close();
				_pongReceived = null;
			}
			if (_receivingExited != null)
			{
				_receivingExited.Close();
				_receivingExited = null;
			}
		}

		private void releaseResources()
		{
			if (_client)
			{
				releaseClientResources();
			}
			else
			{
				releaseServerResources();
			}
			releaseCommonResources();
		}

		private void releaseServerResources()
		{
			if (_closeContext != null)
			{
				_closeContext();
				_closeContext = null;
				_stream = null;
				_context = null;
			}
		}

		private bool send(Opcode opcode, Stream stream)
		{
			lock (_forSend)
			{
				Stream stream2 = stream;
				bool flag = false;
				bool flag2 = false;
				try
				{
					if (_compression != 0)
					{
						stream = stream.Compress(_compression);
						flag = true;
					}
					flag2 = send(opcode, stream, flag);
					if (!flag2)
					{
						error("A send has been interrupted.", null);
					}
				}
				catch (Exception ex)
				{
					_logger.Error(ex.ToString());
					error("An error has occurred during a send.", ex);
				}
				finally
				{
					if (flag)
					{
						stream.Dispose();
					}
					stream2.Dispose();
				}
				return flag2;
			}
		}

		private bool send(Opcode opcode, Stream stream, bool compressed)
		{
			long length = stream.Length;
			if (length == 0)
			{
				return send(Fin.Final, opcode, EmptyBytes, compressed: false);
			}
			long num = length / FragmentLength;
			int num2 = (int)(length % FragmentLength);
			byte[] array = null;
			switch (num)
			{
			case 0L:
				array = new byte[num2];
				return stream.Read(array, 0, num2) == num2 && send(Fin.Final, opcode, array, compressed);
			case 1L:
				if (num2 == 0)
				{
					array = new byte[FragmentLength];
					return stream.Read(array, 0, FragmentLength) == FragmentLength && send(Fin.Final, opcode, array, compressed);
				}
				break;
			}
			array = new byte[FragmentLength];
			if (stream.Read(array, 0, FragmentLength) != FragmentLength || !send(Fin.More, opcode, array, compressed))
			{
				return false;
			}
			long num3 = ((num2 == 0) ? (num - 2) : (num - 1));
			for (long num4 = 0L; num4 < num3; num4++)
			{
				if (stream.Read(array, 0, FragmentLength) != FragmentLength || !send(Fin.More, Opcode.Cont, array, compressed: false))
				{
					return false;
				}
			}
			if (num2 == 0)
			{
				num2 = FragmentLength;
			}
			else
			{
				array = new byte[num2];
			}
			return stream.Read(array, 0, num2) == num2 && send(Fin.Final, Opcode.Cont, array, compressed: false);
		}

		private bool send(Fin fin, Opcode opcode, byte[] data, bool compressed)
		{
			lock (_forState)
			{
				if (_readyState != WebSocketState.Open)
				{
					_logger.Error("The connection is closing.");
					return false;
				}
				WebSocketFrame webSocketFrame = new WebSocketFrame(fin, opcode, data, compressed, _client);
				return sendBytes(webSocketFrame.ToArray());
			}
		}

		private void sendAsync(Opcode opcode, Stream stream, Action<bool> completed)
		{
			Func<Opcode, Stream, bool> sender = send;
			sender.BeginInvoke(opcode, stream, delegate(IAsyncResult ar)
			{
				try
				{
					bool obj = sender.EndInvoke(ar);
					if (completed != null)
					{
						completed(obj);
					}
				}
				catch (Exception ex)
				{
					_logger.Error(ex.ToString());
					error("An error has occurred during the callback for an async send.", ex);
				}
			}, null);
		}

		private bool sendBytes(byte[] bytes)
		{
			try
			{
				_stream.Write(bytes, 0, bytes.Length);
			}
			catch (Exception ex)
			{
				_logger.Error(ex.Message);
				_logger.Debug(ex.ToString());
				return false;
			}
			return true;
		}

		private HttpResponse sendHandshakeRequest()
		{
			HttpRequest httpRequest = createHandshakeRequest();
			HttpResponse httpResponse = sendHttpRequest(httpRequest, 90000);
			if (httpResponse.IsUnauthorized)
			{
				string text = httpResponse.Headers["WWW-Authenticate"];
				_logger.Warn($"Received an authentication requirement for '{text}'.");
				if (text.IsNullOrEmpty())
				{
					_logger.Error("No authentication challenge is specified.");
					return httpResponse;
				}
				_authChallenge = AuthenticationChallenge.Parse(text);
				if (_authChallenge == null)
				{
					_logger.Error("An invalid authentication challenge is specified.");
					return httpResponse;
				}
				if (_credentials != null && (!_preAuth || _authChallenge.Scheme == WebSocketSharp.Net.AuthenticationSchemes.Digest))
				{
					if (httpResponse.HasConnectionClose)
					{
						releaseClientResources();
						setClientStream();
					}
					AuthenticationResponse authenticationResponse = new AuthenticationResponse(_authChallenge, _credentials, _nonceCount);
					_nonceCount = authenticationResponse.NonceCount;
					httpRequest.Headers["Authorization"] = authenticationResponse.ToString();
					httpResponse = sendHttpRequest(httpRequest, 15000);
				}
			}
			if (httpResponse.IsRedirect)
			{
				string text2 = httpResponse.Headers["Location"];
				_logger.Warn($"Received a redirection to '{text2}'.");
				if (_enableRedirection)
				{
					if (text2.IsNullOrEmpty())
					{
						_logger.Error("No url to redirect is located.");
						return httpResponse;
					}
					if (!text2.TryCreateWebSocketUri(out var result, out var text3))
					{
						_logger.Error("An invalid url to redirect is located: " + text3);
						return httpResponse;
					}
					releaseClientResources();
					_uri = result;
					_secure = result.Scheme == "wss";
					setClientStream();
					return sendHandshakeRequest();
				}
			}
			return httpResponse;
		}

		private HttpResponse sendHttpRequest(HttpRequest request, int millisecondsTimeout)
		{
			_logger.Debug("A request to the server:\n" + request.ToString());
			HttpResponse response = request.GetResponse(_stream, millisecondsTimeout);
			_logger.Debug("A response to this request:\n" + response.ToString());
			return response;
		}

		private bool sendHttpResponse(HttpResponse response)
		{
			_logger.Debug($"A response to {_context.UserEndPoint}:\n{response}");
			return sendBytes(response.ToByteArray());
		}

		private void sendProxyConnectRequest()
		{
			HttpRequest httpRequest = HttpRequest.CreateConnectRequest(_uri);
			HttpResponse httpResponse = sendHttpRequest(httpRequest, 90000);
			if (httpResponse.IsProxyAuthenticationRequired)
			{
				string text = httpResponse.Headers["Proxy-Authenticate"];
				_logger.Warn($"Received a proxy authentication requirement for '{text}'.");
				if (text.IsNullOrEmpty())
				{
					throw new WebSocketException("No proxy authentication challenge is specified.");
				}
				AuthenticationChallenge authenticationChallenge = AuthenticationChallenge.Parse(text);
				if (authenticationChallenge == null)
				{
					throw new WebSocketException("An invalid proxy authentication challenge is specified.");
				}
				if (_proxyCredentials != null)
				{
					if (httpResponse.HasConnectionClose)
					{
						releaseClientResources();
						_tcpClient = new TcpClient(_proxyUri.DnsSafeHost, _proxyUri.Port);
						_stream = _tcpClient.GetStream();
					}
					AuthenticationResponse authenticationResponse = new AuthenticationResponse(authenticationChallenge, _proxyCredentials, 0u);
					httpRequest.Headers["Proxy-Authorization"] = authenticationResponse.ToString();
					httpResponse = sendHttpRequest(httpRequest, 15000);
				}
				if (httpResponse.IsProxyAuthenticationRequired)
				{
					throw new WebSocketException("A proxy authentication is required.");
				}
			}
			if (httpResponse.StatusCode[0] != '2')
			{
				throw new WebSocketException("The proxy has failed a connection to the requested host and port.");
			}
		}

		private void setClientStream()
		{
			if (_proxyUri != null)
			{
				_tcpClient = new TcpClient(_proxyUri.DnsSafeHost, _proxyUri.Port);
				_stream = _tcpClient.GetStream();
				sendProxyConnectRequest();
			}
			else
			{
				_tcpClient = new TcpClient(_uri.DnsSafeHost, _uri.Port);
				_stream = _tcpClient.GetStream();
			}
			if (_secure)
			{
				ClientSslConfiguration sslConfiguration = getSslConfiguration();
				string targetHost = sslConfiguration.TargetHost;
				if (targetHost != _uri.DnsSafeHost)
				{
					throw new WebSocketException(CloseStatusCode.TlsHandshakeFailure, "An invalid host name is specified.");
				}
				try
				{
					SslStream sslStream = new SslStream(_stream, leaveInnerStreamOpen: false, sslConfiguration.ServerCertificateValidationCallback, sslConfiguration.ClientCertificateSelectionCallback);
					sslStream.AuthenticateAsClient(targetHost, sslConfiguration.ClientCertificates, sslConfiguration.EnabledSslProtocols, sslConfiguration.CheckCertificateRevocation);
					_stream = sslStream;
				}
				catch (Exception innerException)
				{
					throw new WebSocketException(CloseStatusCode.TlsHandshakeFailure, innerException);
				}
			}
		}

		private void startReceiving()
		{
			if (_messageEventQueue.Count > 0)
			{
				_messageEventQueue.Clear();
			}
			_pongReceived = new ManualResetEvent(initialState: false);
			_receivingExited = new ManualResetEvent(initialState: false);
			Action receive = null;
			receive = delegate
			{
				WebSocketFrame.ReadFrameAsync(_stream, unmask: false, delegate(WebSocketFrame frame)
				{
					if (!processReceivedFrame(frame) || _readyState == WebSocketState.Closed)
					{
						_receivingExited?.Set();
					}
					else
					{
						receive();
						if (!_inMessage && HasMessage && _readyState == WebSocketState.Open)
						{
							message();
						}
					}
				}, delegate(Exception ex)
				{
					_logger.Fatal(ex.ToString());
					fatal("An exception has occurred while receiving.", ex);
				});
			};
			receive();
		}

		private bool validateSecWebSocketAcceptHeader(string value)
		{
			return value != null && value == CreateResponseKey(_base64Key);
		}

		private bool validateSecWebSocketExtensionsServerHeader(string value)
		{
			if (value == null)
			{
				return true;
			}
			if (value.Length == 0)
			{
				return false;
			}
			if (!_extensionsRequested)
			{
				return false;
			}
			bool flag = _compression != CompressionMethod.None;
			foreach (string item in value.SplitHeaderValue(','))
			{
				string text = item.Trim();
				if (flag && text.IsCompressionExtension(_compression))
				{
					if (!text.Contains("server_no_context_takeover"))
					{
						_logger.Error("The server hasn't sent back 'server_no_context_takeover'.");
						return false;
					}
					if (!text.Contains("client_no_context_takeover"))
					{
						_logger.Warn("The server hasn't sent back 'client_no_context_takeover'.");
					}
					string method = _compression.ToExtensionString();
					if (text.SplitHeaderValue(';').Contains(delegate(string t)
					{
						t = t.Trim();
						return t != method && t != "server_no_context_takeover" && t != "client_no_context_takeover";
					}))
					{
						return false;
					}
					continue;
				}
				return false;
			}
			return true;
		}

		private bool validateSecWebSocketProtocolServerHeader(string value)
		{
			if (value == null)
			{
				return !_protocolsRequested;
			}
			if (value.Length == 0)
			{
				return false;
			}
			return _protocolsRequested && _protocols.Contains((string p) => p == value);
		}

		private bool validateSecWebSocketVersionServerHeader(string value)
		{
			return value == null || value == "13";
		}

		internal void Close(HttpResponse response)
		{
			_readyState = WebSocketState.Closing;
			sendHttpResponse(response);
			releaseServerResources();
			_readyState = WebSocketState.Closed;
		}

		internal void Close(WebSocketSharp.Net.HttpStatusCode code)
		{
			Close(createHandshakeFailureResponse(code));
		}

		internal void Close(PayloadData payloadData, byte[] frameAsBytes)
		{
			lock (_forState)
			{
				if (_readyState == WebSocketState.Closing)
				{
					_logger.Info("The closing is already in progress.");
					return;
				}
				if (_readyState == WebSocketState.Closed)
				{
					_logger.Info("The connection has already been closed.");
					return;
				}
				_readyState = WebSocketState.Closing;
			}
			_logger.Trace("Begin closing the connection.");
			bool flag = frameAsBytes != null && sendBytes(frameAsBytes);
			bool flag2 = flag && _receivingExited != null && _receivingExited.WaitOne(_waitTime);
			bool flag3 = flag && flag2;
			_logger.Debug($"Was clean?: {flag3}\n  sent: {flag}\n  received: {flag2}");
			releaseServerResources();
			releaseCommonResources();
			_logger.Trace("End closing the connection.");
			_readyState = WebSocketState.Closed;
			CloseEventArgs e = new CloseEventArgs(payloadData, flag3);
			try
			{
				this.OnClose.Emit(this, e);
			}
			catch (Exception ex)
			{
				_logger.Error(ex.Message);
				_logger.Debug(ex.ToString());
			}
		}

		internal static string CreateBase64Key()
		{
			byte[] array = new byte[16];
			RandomNumber.GetBytes(array);
			return Convert.ToBase64String(array);
		}

		internal static string CreateResponseKey(string base64Key)
		{
			StringBuilder stringBuilder = new StringBuilder(base64Key, 64);
			stringBuilder.Append("258EAFA5-E914-47DA-95CA-C5AB0DC85B11");
			SHA1 sHA = new SHA1CryptoServiceProvider();
			byte[] inArray = sHA.ComputeHash(stringBuilder.ToString().GetUTF8EncodedBytes());
			return Convert.ToBase64String(inArray);
		}

		internal void InternalAccept()
		{
			try
			{
				if (!acceptHandshake())
				{
					return;
				}
			}
			catch (Exception ex)
			{
				_logger.Fatal(ex.Message);
				_logger.Debug(ex.ToString());
				string text = "An exception has occurred while attempting to accept.";
				fatal(text, ex);
				return;
			}
			_readyState = WebSocketState.Open;
			open();
		}

		internal bool Ping(byte[] frameAsBytes, TimeSpan timeout)
		{
			if (_readyState != WebSocketState.Open)
			{
				return false;
			}
			ManualResetEvent pongReceived = _pongReceived;
			if (pongReceived == null)
			{
				return false;
			}
			lock (_forPing)
			{
				try
				{
					pongReceived.Reset();
					lock (_forState)
					{
						if (_readyState != WebSocketState.Open)
						{
							return false;
						}
						if (!sendBytes(frameAsBytes))
						{
							return false;
						}
					}
					return pongReceived.WaitOne(timeout);
				}
				catch (ObjectDisposedException)
				{
					return false;
				}
			}
		}

		internal void Send(Opcode opcode, byte[] data, Dictionary<CompressionMethod, byte[]> cache)
		{
			lock (_forSend)
			{
				lock (_forState)
				{
					if (_readyState != WebSocketState.Open)
					{
						_logger.Error("The connection is closing.");
						return;
					}
					if (!cache.TryGetValue(_compression, out var value))
					{
						value = new WebSocketFrame(Fin.Final, opcode, data.Compress(_compression), _compression != CompressionMethod.None, mask: false).ToArray();
						cache.Add(_compression, value);
					}
					sendBytes(value);
				}
			}
		}

		internal void Send(Opcode opcode, Stream stream, Dictionary<CompressionMethod, Stream> cache)
		{
			lock (_forSend)
			{
				if (!cache.TryGetValue(_compression, out var value))
				{
					value = stream.Compress(_compression);
					cache.Add(_compression, value);
				}
				else
				{
					value.Position = 0L;
				}
				send(opcode, value, _compression != CompressionMethod.None);
			}
		}

		public void Accept()
		{
			if (_client)
			{
				string text = "This instance is a client.";
				throw new InvalidOperationException(text);
			}
			if (_readyState == WebSocketState.Closing)
			{
				string text2 = "The close process is in progress.";
				throw new InvalidOperationException(text2);
			}
			if (_readyState == WebSocketState.Closed)
			{
				string text3 = "The connection has already been closed.";
				throw new InvalidOperationException(text3);
			}
			if (accept())
			{
				open();
			}
		}

		public void AcceptAsync()
		{
			if (_client)
			{
				string text = "This instance is a client.";
				throw new InvalidOperationException(text);
			}
			if (_readyState == WebSocketState.Closing)
			{
				string text2 = "The close process is in progress.";
				throw new InvalidOperationException(text2);
			}
			if (_readyState == WebSocketState.Closed)
			{
				string text3 = "The connection has already been closed.";
				throw new InvalidOperationException(text3);
			}
			Func<bool> acceptor = accept;
			acceptor.BeginInvoke(delegate(IAsyncResult ar)
			{
				if (acceptor.EndInvoke(ar))
				{
					open();
				}
			}, null);
		}

		public void Close()
		{
			close(1005, string.Empty);
		}

		public void Close(ushort code)
		{
			if (!code.IsCloseStatusCode())
			{
				string text = "Less than 1000 or greater than 4999.";
				throw new ArgumentOutOfRangeException("code", text);
			}
			if (_client && code == 1011)
			{
				string text2 = "1011 cannot be used.";
				throw new ArgumentException(text2, "code");
			}
			if (!_client && code == 1010)
			{
				string text3 = "1010 cannot be used.";
				throw new ArgumentException(text3, "code");
			}
			close(code, string.Empty);
		}

		public void Close(CloseStatusCode code)
		{
			if (_client && code == CloseStatusCode.ServerError)
			{
				string text = "ServerError cannot be used.";
				throw new ArgumentException(text, "code");
			}
			if (!_client && code == CloseStatusCode.MandatoryExtension)
			{
				string text2 = "MandatoryExtension cannot be used.";
				throw new ArgumentException(text2, "code");
			}
			close((ushort)code, string.Empty);
		}

		public void Close(ushort code, string reason)
		{
			if (!code.IsCloseStatusCode())
			{
				string text = "Less than 1000 or greater than 4999.";
				throw new ArgumentOutOfRangeException("code", text);
			}
			if (_client && code == 1011)
			{
				string text2 = "1011 cannot be used.";
				throw new ArgumentException(text2, "code");
			}
			if (!_client && code == 1010)
			{
				string text3 = "1010 cannot be used.";
				throw new ArgumentException(text3, "code");
			}
			if (reason.IsNullOrEmpty())
			{
				close(code, string.Empty);
				return;
			}
			if (code == 1005)
			{
				string text4 = "1005 cannot be used.";
				throw new ArgumentException(text4, "code");
			}
			if (!reason.TryGetUTF8EncodedBytes(out var bytes))
			{
				string text5 = "It could not be UTF-8-encoded.";
				throw new ArgumentException(text5, "reason");
			}
			if (bytes.Length > 123)
			{
				string text6 = "Its size is greater than 123 bytes.";
				throw new ArgumentOutOfRangeException("reason", text6);
			}
			close(code, reason);
		}

		public void Close(CloseStatusCode code, string reason)
		{
			if (_client && code == CloseStatusCode.ServerError)
			{
				string text = "ServerError cannot be used.";
				throw new ArgumentException(text, "code");
			}
			if (!_client && code == CloseStatusCode.MandatoryExtension)
			{
				string text2 = "MandatoryExtension cannot be used.";
				throw new ArgumentException(text2, "code");
			}
			if (reason.IsNullOrEmpty())
			{
				close((ushort)code, string.Empty);
				return;
			}
			if (code == CloseStatusCode.NoStatus)
			{
				string text3 = "NoStatus cannot be used.";
				throw new ArgumentException(text3, "code");
			}
			if (!reason.TryGetUTF8EncodedBytes(out var bytes))
			{
				string text4 = "It could not be UTF-8-encoded.";
				throw new ArgumentException(text4, "reason");
			}
			if (bytes.Length > 123)
			{
				string text5 = "Its size is greater than 123 bytes.";
				throw new ArgumentOutOfRangeException("reason", text5);
			}
			close((ushort)code, reason);
		}

		public void CloseAsync()
		{
			closeAsync(1005, string.Empty);
		}

		public void CloseAsync(ushort code)
		{
			if (!code.IsCloseStatusCode())
			{
				string text = "Less than 1000 or greater than 4999.";
				throw new ArgumentOutOfRangeException("code", text);
			}
			if (_client && code == 1011)
			{
				string text2 = "1011 cannot be used.";
				throw new ArgumentException(text2, "code");
			}
			if (!_client && code == 1010)
			{
				string text3 = "1010 cannot be used.";
				throw new ArgumentException(text3, "code");
			}
			closeAsync(code, string.Empty);
		}

		public void CloseAsync(CloseStatusCode code)
		{
			if (_client && code == CloseStatusCode.ServerError)
			{
				string text = "ServerError cannot be used.";
				throw new ArgumentException(text, "code");
			}
			if (!_client && code == CloseStatusCode.MandatoryExtension)
			{
				string text2 = "MandatoryExtension cannot be used.";
				throw new ArgumentException(text2, "code");
			}
			closeAsync((ushort)code, string.Empty);
		}

		public void CloseAsync(ushort code, string reason)
		{
			if (!code.IsCloseStatusCode())
			{
				string text = "Less than 1000 or greater than 4999.";
				throw new ArgumentOutOfRangeException("code", text);
			}
			if (_client && code == 1011)
			{
				string text2 = "1011 cannot be used.";
				throw new ArgumentException(text2, "code");
			}
			if (!_client && code == 1010)
			{
				string text3 = "1010 cannot be used.";
				throw new ArgumentException(text3, "code");
			}
			if (reason.IsNullOrEmpty())
			{
				closeAsync(code, string.Empty);
				return;
			}
			if (code == 1005)
			{
				string text4 = "1005 cannot be used.";
				throw new ArgumentException(text4, "code");
			}
			if (!reason.TryGetUTF8EncodedBytes(out var bytes))
			{
				string text5 = "It could not be UTF-8-encoded.";
				throw new ArgumentException(text5, "reason");
			}
			if (bytes.Length > 123)
			{
				string text6 = "Its size is greater than 123 bytes.";
				throw new ArgumentOutOfRangeException("reason", text6);
			}
			closeAsync(code, reason);
		}

		public void CloseAsync(CloseStatusCode code, string reason)
		{
			if (_client && code == CloseStatusCode.ServerError)
			{
				string text = "ServerError cannot be used.";
				throw new ArgumentException(text, "code");
			}
			if (!_client && code == CloseStatusCode.MandatoryExtension)
			{
				string text2 = "MandatoryExtension cannot be used.";
				throw new ArgumentException(text2, "code");
			}
			if (reason.IsNullOrEmpty())
			{
				closeAsync((ushort)code, string.Empty);
				return;
			}
			if (code == CloseStatusCode.NoStatus)
			{
				string text3 = "NoStatus cannot be used.";
				throw new ArgumentException(text3, "code");
			}
			if (!reason.TryGetUTF8EncodedBytes(out var bytes))
			{
				string text4 = "It could not be UTF-8-encoded.";
				throw new ArgumentException(text4, "reason");
			}
			if (bytes.Length > 123)
			{
				string text5 = "Its size is greater than 123 bytes.";
				throw new ArgumentOutOfRangeException("reason", text5);
			}
			closeAsync((ushort)code, reason);
		}

		public void Connect()
		{
			if (!_client)
			{
				string text = "This instance is not a client.";
				throw new InvalidOperationException(text);
			}
			if (_readyState == WebSocketState.Closing)
			{
				string text2 = "The close process is in progress.";
				throw new InvalidOperationException(text2);
			}
			if (_retryCountForConnect > _maxRetryCountForConnect)
			{
				string text3 = "A series of reconnecting has failed.";
				throw new InvalidOperationException(text3);
			}
			if (connect())
			{
				open();
			}
		}

		public void ConnectAsync()
		{
			if (!_client)
			{
				string text = "This instance is not a client.";
				throw new InvalidOperationException(text);
			}
			if (_readyState == WebSocketState.Closing)
			{
				string text2 = "The close process is in progress.";
				throw new InvalidOperationException(text2);
			}
			if (_retryCountForConnect > _maxRetryCountForConnect)
			{
				string text3 = "A series of reconnecting has failed.";
				throw new InvalidOperationException(text3);
			}
			Func<bool> connector = connect;
			connector.BeginInvoke(delegate(IAsyncResult ar)
			{
				if (connector.EndInvoke(ar))
				{
					open();
				}
			}, null);
		}

		public bool Ping()
		{
			return ping(EmptyBytes);
		}

		public bool Ping(string message)
		{
			if (message.IsNullOrEmpty())
			{
				return ping(EmptyBytes);
			}
			if (!message.TryGetUTF8EncodedBytes(out var bytes))
			{
				string text = "It could not be UTF-8-encoded.";
				throw new ArgumentException(text, "message");
			}
			if (bytes.Length > 125)
			{
				string text2 = "Its size is greater than 125 bytes.";
				throw new ArgumentOutOfRangeException("message", text2);
			}
			return ping(bytes);
		}

		public void Send(byte[] data)
		{
			if (_readyState != WebSocketState.Open)
			{
				string text = "The current state of the connection is not Open.";
				throw new InvalidOperationException(text);
			}
			if (data == null)
			{
				throw new ArgumentNullException("data");
			}
			send(Opcode.Binary, new MemoryStream(data));
		}

		public void Send(FileInfo fileInfo)
		{
			if (_readyState != WebSocketState.Open)
			{
				string text = "The current state of the connection is not Open.";
				throw new InvalidOperationException(text);
			}
			if (fileInfo == null)
			{
				throw new ArgumentNullException("fileInfo");
			}
			if (!fileInfo.Exists)
			{
				string text2 = "The file does not exist.";
				throw new ArgumentException(text2, "fileInfo");
			}
			if (!fileInfo.TryOpenRead(out var fileStream))
			{
				string text3 = "The file could not be opened.";
				throw new ArgumentException(text3, "fileInfo");
			}
			send(Opcode.Binary, fileStream);
		}

		public void Send(string data)
		{
			if (_readyState != WebSocketState.Open)
			{
				string text = "The current state of the connection is not Open.";
				throw new InvalidOperationException(text);
			}
			if (data == null)
			{
				throw new ArgumentNullException("data");
			}
			if (!data.TryGetUTF8EncodedBytes(out var bytes))
			{
				string text2 = "It could not be UTF-8-encoded.";
				throw new ArgumentException(text2, "data");
			}
			send(Opcode.Text, new MemoryStream(bytes));
		}

		public void Send(Stream stream, int length)
		{
			if (_readyState != WebSocketState.Open)
			{
				string text = "The current state of the connection is not Open.";
				throw new InvalidOperationException(text);
			}
			if (stream == null)
			{
				throw new ArgumentNullException("stream");
			}
			if (!stream.CanRead)
			{
				string text2 = "It cannot be read.";
				throw new ArgumentException(text2, "stream");
			}
			if (length < 1)
			{
				string text3 = "Less than 1.";
				throw new ArgumentException(text3, "length");
			}
			byte[] array = stream.ReadBytes(length);
			int num = array.Length;
			if (num == 0)
			{
				string text4 = "No data could be read from it.";
				throw new ArgumentException(text4, "stream");
			}
			if (num < length)
			{
				_logger.Warn($"Only {num} byte(s) of data could be read from the stream.");
			}
			send(Opcode.Binary, new MemoryStream(array));
		}

		public void SendAsync(byte[] data, Action<bool> completed)
		{
			if (_readyState != WebSocketState.Open)
			{
				string text = "The current state of the connection is not Open.";
				throw new InvalidOperationException(text);
			}
			if (data == null)
			{
				throw new ArgumentNullException("data");
			}
			sendAsync(Opcode.Binary, new MemoryStream(data), completed);
		}

		public void SendAsync(FileInfo fileInfo, Action<bool> completed)
		{
			if (_readyState != WebSocketState.Open)
			{
				string text = "The current state of the connection is not Open.";
				throw new InvalidOperationException(text);
			}
			if (fileInfo == null)
			{
				throw new ArgumentNullException("fileInfo");
			}
			if (!fileInfo.Exists)
			{
				string text2 = "The file does not exist.";
				throw new ArgumentException(text2, "fileInfo");
			}
			if (!fileInfo.TryOpenRead(out var fileStream))
			{
				string text3 = "The file could not be opened.";
				throw new ArgumentException(text3, "fileInfo");
			}
			sendAsync(Opcode.Binary, fileStream, completed);
		}

		public void SendAsync(string data, Action<bool> completed)
		{
			if (_readyState != WebSocketState.Open)
			{
				string text = "The current state of the connection is not Open.";
				throw new InvalidOperationException(text);
			}
			if (data == null)
			{
				throw new ArgumentNullException("data");
			}
			if (!data.TryGetUTF8EncodedBytes(out var bytes))
			{
				string text2 = "It could not be UTF-8-encoded.";
				throw new ArgumentException(text2, "data");
			}
			sendAsync(Opcode.Text, new MemoryStream(bytes), completed);
		}

		public void SendAsync(Stream stream, int length, Action<bool> completed)
		{
			if (_readyState != WebSocketState.Open)
			{
				string text = "The current state of the connection is not Open.";
				throw new InvalidOperationException(text);
			}
			if (stream == null)
			{
				throw new ArgumentNullException("stream");
			}
			if (!stream.CanRead)
			{
				string text2 = "It cannot be read.";
				throw new ArgumentException(text2, "stream");
			}
			if (length < 1)
			{
				string text3 = "Less than 1.";
				throw new ArgumentException(text3, "length");
			}
			byte[] array = stream.ReadBytes(length);
			int num = array.Length;
			if (num == 0)
			{
				string text4 = "No data could be read from it.";
				throw new ArgumentException(text4, "stream");
			}
			if (num < length)
			{
				_logger.Warn($"Only {num} byte(s) of data could be read from the stream.");
			}
			sendAsync(Opcode.Binary, new MemoryStream(array), completed);
		}

		public void SetCookie(WebSocketSharp.Net.Cookie cookie)
		{
			string text = null;
			if (!_client)
			{
				text = "This instance is not a client.";
				throw new InvalidOperationException(text);
			}
			if (cookie == null)
			{
				throw new ArgumentNullException("cookie");
			}
			if (!canSet(out text))
			{
				_logger.Warn(text);
				return;
			}
			lock (_forState)
			{
				if (!canSet(out text))
				{
					_logger.Warn(text);
					return;
				}
				lock (_cookies.SyncRoot)
				{
					_cookies.SetOrRemove(cookie);
				}
			}
		}

		public void SetCredentials(string username, string password, bool preAuth)
		{
			string text = null;
			if (!_client)
			{
				text = "This instance is not a client.";
				throw new InvalidOperationException(text);
			}
			if (!username.IsNullOrEmpty() && (Ext.Contains(username, ':') || !username.IsText()))
			{
				text = "It contains an invalid character.";
				throw new ArgumentException(text, "username");
			}
			if (!password.IsNullOrEmpty() && !password.IsText())
			{
				text = "It contains an invalid character.";
				throw new ArgumentException(text, "password");
			}
			if (!canSet(out text))
			{
				_logger.Warn(text);
				return;
			}
			lock (_forState)
			{
				if (!canSet(out text))
				{
					_logger.Warn(text);
				}
				else if (username.IsNullOrEmpty())
				{
					_credentials = null;
					_preAuth = false;
				}
				else
				{
					_credentials = new WebSocketSharp.Net.NetworkCredential(username, password, _uri.PathAndQuery);
					_preAuth = preAuth;
				}
			}
		}

		public void SetProxy(string url, string username, string password)
		{
			string text = null;
			if (!_client)
			{
				text = "This instance is not a client.";
				throw new InvalidOperationException(text);
			}
			Uri result = null;
			if (!url.IsNullOrEmpty())
			{
				if (!Uri.TryCreate(url, UriKind.Absolute, out result))
				{
					text = "Not an absolute URI string.";
					throw new ArgumentException(text, "url");
				}
				if (result.Scheme != "http")
				{
					text = "The scheme part is not http.";
					throw new ArgumentException(text, "url");
				}
				if (result.Segments.Length > 1)
				{
					text = "It includes the path segments.";
					throw new ArgumentException(text, "url");
				}
			}
			if (!username.IsNullOrEmpty() && (Ext.Contains(username, ':') || !username.IsText()))
			{
				text = "It contains an invalid character.";
				throw new ArgumentException(text, "username");
			}
			if (!password.IsNullOrEmpty() && !password.IsText())
			{
				text = "It contains an invalid character.";
				throw new ArgumentException(text, "password");
			}
			if (!canSet(out text))
			{
				_logger.Warn(text);
				return;
			}
			lock (_forState)
			{
				if (!canSet(out text))
				{
					_logger.Warn(text);