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Copy pathExt.cs
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2238 lines (1957 loc) · 58.8 KB
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#region License
/*
* Ext.cs
*
* Some parts of this code are derived from Mono (http://www.mono-project.com):
* - GetStatusDescription is derived from HttpListenerResponse.cs (System.Net)
* - IsPredefinedScheme is derived from Uri.cs (System)
* - MaybeUri is derived from SUri.cs (System)
*
* The MIT License
*
* Copyright (c) 2001 Garrett Rooney
* Copyright (c) 2003 Ian MacLean
* Copyright (c) 2003 Ben Maurer
* Copyright (c) 2003, 2005, 2009 Novell, Inc. (http://www.novell.com)
* Copyright (c) 2009 Stephane Delcroix
* Copyright (c) 2010-2019 sta.blockhead
* Copyright © 2019 Nivloc Enterprises Ltd
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#endregion
#region Contributors
/*
* Contributors:
* - Liryna <liryna.stark@gmail.com>
* - Nikola Kovacevic <nikolak@outlook.com>
* - Chris Swiedler
*/
#endregion
using System;
using System.Linq;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Text;
#if SSHARP
using Crestron.SimplSharp;
using Crestron.SimplSharp.CrestronIO;
using Crestron.SimplSharp.CrestronIO.Compression;
using Crestron.SimplSharp.Cryptography.X509Certificates;
using TcpClient = Crestron.SimplSharp.CrestronSockets.CrestronServerSocket;
using SSMono.Net;
using CookieCollection = WebSocketSharp.Net.CookieCollection;
using SSMono.Web;
using HttpUtility = SSMono.Web.HttpUtility;
using AsyncCallback = Crestron.SimplSharp.CrestronIO.AsyncCallback;
#else
using System.IO;
using System.IO.Compression;
using System.Net;
using System.Net.Sockets;
using System.Security.Cryptography.X509Certificates;
#endif
#if NETCF
using OpenNETCF;
#endif
using WebSocketSharp.Net;
using WebSocketSharp.Net.WebSockets;
#if !CLIENT
using WebSocketSharp.Server;
#endif
using System.Globalization;
namespace WebSocketSharp
{
/// <summary>
/// Provides a set of static methods for websocket-sharp.
/// </summary>
public static class Ext
{
#region Private Fields
private static readonly byte[] _last = new byte[] {0x00};
private static readonly int _retry = 5;
private const string _tspecials = "()<>@,;:\\\"/[]?={} \t";
#endregion
#region Private Methods
private static byte[] compress (this byte[] data)
{
#if NETCF
if (data.Length == 0)
#else
if (data.LongLength == 0)
#endif
//return new byte[] { 0x00, 0x00, 0x00, 0xff, 0xff };
return data;
using (var input = new MemoryStream (data))
return input.compressToArray ();
}
private static MemoryStream compress (this Stream stream)
{
var output = new MemoryStream ();
if (stream.Length == 0)
return output;
stream.Position = 0;
using (var ds = new DeflateStream (output, CompressionMode.Compress, true))
{
stream.CopyTo (ds, 1024);
ds.Close (); // BFINAL set to 1.
output.Write (_last, 0, 1);
output.Position = 0;
return output;
}
}
private static byte[] compressToArray (this Stream stream)
{
using (var output = stream.compress ())
{
output.Close ();
return output.ToArray ();
}
}
private static byte[] decompress (this byte[] data)
{
#if NETCF
if (data.Length == 0)
#else
if (data.LongLength == 0)
#endif
return data;
using (var input = new MemoryStream (data))
return input.decompressToArray ();
}
private static MemoryStream decompress (this Stream stream)
{
var output = new MemoryStream ();
if (stream.Length == 0)
return output;
stream.Position = 0;
using (var ds = new DeflateStream (stream, CompressionMode.Decompress, true))
{
ds.CopyTo (output, 1024);
output.Position = 0;
return output;
}
}
private static byte[] decompressToArray (this Stream stream)
{
using (var output = stream.decompress ())
{
output.Close ();
return output.ToArray ();
}
}
private static bool isHttpMethod (this string value)
{
return value == "GET"
|| value == "HEAD"
|| value == "POST"
|| value == "PUT"
|| value == "DELETE"
|| value == "CONNECT"
|| value == "OPTIONS"
|| value == "TRACE";
}
private static bool isHttpMethod10 (this string value)
{
return value == "GET"
|| value == "HEAD"
|| value == "POST";
}
private static void times (this ulong n, Action action)
{
for (ulong i = 0; i < n; i++)
action ();
}
private static string toResponseStringVersion0 (this Cookie cookie)
{
var output = new StringBuilder (64);
output.AppendFormat ("{0}={1}", cookie.Name, cookie.Value);
if (cookie.Expires != DateTime.MinValue)
{
output.AppendFormat ("; Expires={0}",
cookie.Expires.ToUniversalTime ().ToString ("ddd, dd'-'MMM'-'yyyy HH':'mm':'ss 'GMT'", CultureInfo.CreateSpecificCulture ("en-US")));
}
if (!cookie.Path.IsNullOrEmpty ())
output.AppendFormat ("; Path={0}", cookie.Path);
if (!cookie.Domain.IsNullOrEmpty ())
output.AppendFormat ("; Domain={0}", cookie.Domain);
if (cookie.Secure)
output.Append ("; Secure");
if (cookie.HttpOnly)
output.Append ("; HttpOnly");
return output.ToString ();
}
private static string toResponseStringVersion1 (this Cookie cookie)
{
var buff = new StringBuilder (64);
buff.AppendFormat ("{0}={1}; Version={2}", cookie.Name, cookie.Value, cookie.Version);
if (cookie.Expires != DateTime.MinValue)
buff.AppendFormat ("; Max-Age={0}", cookie.MaxAge ());
if (!cookie.Path.IsNullOrEmpty ())
buff.AppendFormat ("; Path={0}", cookie.Path);
if (!cookie.Domain.IsNullOrEmpty ())
buff.AppendFormat ("; Domain={0}", cookie.Domain);
if (!cookie.Port.IsNullOrEmpty ())
{
buff.Append (cookie.Port != "\"\"" ? String.Format ("; Port={0}", cookie.Port) : "; Port");
}
if (!cookie.Comment.IsNullOrEmpty ())
buff.AppendFormat ("; Comment={0}", HttpUtility.UrlEncode (cookie.Comment));
if (cookie.CommentUri != null)
{
var url = cookie.CommentUri.OriginalString;
buff.AppendFormat ("; CommentURL={0}", url.IsToken () ? url : url.Quote ());
}
if (cookie.Discard)
buff.Append ("; Discard");
if (cookie.Secure)
buff.Append ("; Secure");
return buff.ToString ();
}
#endregion
#region Internal Methods
internal static byte[] Append (this ushort code, string reason)
{
var ret = code.InternalToByteArray (ByteOrder.Big);
if (reason != null && reason.Length > 0)
{
var buff = new List<byte> (ret);
buff.AddRange (Encoding.UTF8.GetBytes (reason));
ret = buff.ToArray ();
}
return ret;
}
#if !CLIENT
internal static void Close (this HttpListenerResponse response, HttpStatusCode code)
{
response.StatusCode = (int)code;
response.OutputStream.Close ();
}
internal static void CloseWithAuthChallenge (this HttpListenerResponse response, string challenge)
{
response.Headers.InternalSet ("WWW-Authenticate", challenge, true);
response.Close (HttpStatusCode.Unauthorized);
}
#endif
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 ();
}
/// <summary>
/// Determines whether the specified string contains any of characters in
/// the specified array of <see cref="char"/>.
/// </summary>
/// <returns>
/// <c>true</c> if <paramref name="value"/> contains any of characters in
/// <paramref name="anyOf"/>; otherwise, <c>false</c>.
/// </returns>
/// <param name="value">
/// A <see cref="string"/> to test.
/// </param>
/// <param name="anyOf">
/// An array of <see cref="char"/> that contains one or more characters to
/// seek.
/// </param>
internal static bool Contains (this string value, params char[] anyOf)
{
return anyOf != null && anyOf.Length > 0
? value.IndexOfAny (anyOf) > -1
: false;
}
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)
{
var val = collection[name];
if (val == null)
return false;
foreach (var elm in val.Split (','))
{
if (elm.Trim ().Equals (value, comparisonTypeForValue))
return true;
}
return false;
}
internal static bool Contains<T> (this IEnumerable<T> source, Func<T, bool> condition)
{
foreach (T elm in source)
{
if (condition (elm))
return true;
}
return false;
}
internal static bool ContainsTwice (this string[] values)
{
var len = values.Length;
var end = len - 1;
Func<int, bool> seek = null;
seek = idx =>
{
if (idx == end)
return false;
var val = values[idx];
for (var i = idx + 1; i < len; i++)
{
if (values[i] == val)
return true;
}
return seek (++idx);
};
return seek (0);
}
internal static T[] Copy<T> (this T[] source, int length)
{
var dest = new T[length];
Array.Copy (source, 0, dest, 0, length);
return dest;
}
internal static T[] Copy<T> (this T[] source, long length)
{
var dest = new T[length];
#if NETCF
Array.Copy (source, 0, dest, 0, (int)length);
#else
Array.Copy (source, 0, dest, 0, length);
#endif
return dest;
}
internal static void CopyTo (this Stream source, Stream destination, int bufferLength)
{
var buff = new byte[bufferLength];
var nread = 0;
while ((nread = source.Read (buff, 0, bufferLength)) > 0)
destination.Write (buff, 0, nread);
}
internal static void CopyToAsync (this Stream source, Stream destination, int bufferLength, Action completed, Action<Exception> error)
{
var buff = new byte[bufferLength];
AsyncCallback callback = null;
callback = ar =>
{
try
{
var nread = source.EndRead (ar);
if (nread <= 0)
{
if (completed != null)
completed ();
return;
}
destination.Write (buff, 0, nread);
source.BeginRead (buff, 0, bufferLength, callback, null);
}
catch (Exception ex)
{
if (error != null)
error (ex);
}
};
try
{
source.BeginRead (buff, 0, bufferLength, callback, null);
}
catch (Exception ex)
{
if (error != null)
error (ex);
}
}
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 ();
}
/// <summary>
/// Determines whether the specified <see cref="int"/> equals the specified <see cref="char"/>,
/// and invokes the specified <c>Action<int></c> delegate at the same time.
/// </summary>
/// <returns>
/// <c>true</c> if <paramref name="value"/> equals <paramref name="c"/>;
/// otherwise, <c>false</c>.
/// </returns>
/// <param name="value">
/// An <see cref="int"/> to compare.
/// </param>
/// <param name="c">
/// A <see cref="char"/> to compare.
/// </param>
/// <param name="action">
/// An <c>Action<int></c> delegate that references the method(s) called
/// at the same time as comparing. An <see cref="int"/> parameter to pass to
/// the method(s) is <paramref name="value"/>.
/// </param>
internal static bool EqualsWith (this int value, char c, Action<int> action)
{
action (value);
return value == c - 0;
}
/// <summary>
/// Gets the absolute path from the specified <see cref="Uri"/>.
/// </summary>
/// <returns>
/// A <see cref="string"/> that represents the absolute path if it's successfully found;
/// otherwise, <see langword="null"/>.
/// </returns>
/// <param name="uri">
/// A <see cref="Uri"/> that represents the URI to get the absolute path from.
/// </param>
internal static string GetAbsolutePath (this Uri uri)
{
if (uri.IsAbsoluteUri)
return uri.AbsolutePath;
var original = uri.OriginalString;
if (original[0] != '/')
return null;
var idx = original.IndexOfAny (new[] {'?', '#'});
return idx > 0 ? original.Substring (0, idx) : original;
}
internal static CookieCollection GetCookies (this NameValueCollection headers, bool response)
{
var val = headers[response ? "Set-Cookie" : "Cookie"];
return val != null ? CookieCollection.Parse (val, response) : new 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 == CloseStatusCode.ProtocolError
? "A WebSocket protocol error has occurred."
: code == CloseStatusCode.UnsupportedData
? "An incorrect data has been received."
: code == CloseStatusCode.Abnormal
? "An exception has occurred."
: code == CloseStatusCode.InvalidData
? "An inconsistent data has been received."
: code == CloseStatusCode.PolicyViolation
? "A policy violation has occurred."
: code == CloseStatusCode.TooBig
? "A too big data has been received."
: code == CloseStatusCode.MandatoryExtension
? "WebSocket client didn't receive expected extension(s)."
: code == CloseStatusCode.ServerError
? "WebSocket server got an internal error."
: code == CloseStatusCode.TlsHandshakeFailure ? "An error has occurred durreng a TLS handshake." : String.Empty;
}
/// <summary>
/// Gets the name from the specified string that contains a pair of
/// name and value separated by a character.
/// </summary>
/// <returns>
/// <para>
/// A <see cref="string"/> that represents the name.
/// </para>
/// <para>
/// <see langword="null"/> if the name is not present.
/// </para>
/// </returns>
/// <param name="nameAndValue">
/// A <see cref="string"/> that contains a pair of name and value.
/// </param>
/// <param name="separator">
/// A <see cref="char"/> used to separate name and value.
/// </param>
internal static string GetName (this string nameAndValue, char separator)
{
var idx = nameAndValue.IndexOf (separator);
return idx > 0 ? nameAndValue.Substring (0, idx).Trim () : null;
}
/// <summary>
/// Gets the value from the specified string that contains a pair of
/// name and value separated by a character.
/// </summary>
/// <returns>
/// <para>
/// A <see cref="string"/> that represents the value.
/// </para>
/// <para>
/// <see langword="null"/> if the value is not present.
/// </para>
/// </returns>
/// <param name="nameAndValue">
/// A <see cref="string"/> that contains a pair of name and value.
/// </param>
/// <param name="separator">
/// A <see cref="char"/> used to separate name and value.
/// </param>
internal static string GetValue (this string nameAndValue, char separator)
{
return nameAndValue.GetValue (separator, false);
}
/// <summary>
/// Gets the value from the specified string that contains a pair of
/// name and value separated by a character.
/// </summary>
/// <returns>
/// <para>
/// A <see cref="string"/> that represents the value.
/// </para>
/// <para>
/// <see langword="null"/> if the value is not present.
/// </para>
/// </returns>
/// <param name="nameAndValue">
/// A <see cref="string"/> that contains a pair of name and value.
/// </param>
/// <param name="separator">
/// A <see cref="char"/> used to separate name and value.
/// </param>
/// <param name="unquote">
/// A <see cref="bool"/>: <c>true</c> if unquotes the value; otherwise,
/// <c>false</c>.
/// </param>
internal static string GetValue (this string nameAndValue, char separator, bool unquote)
{
var idx = nameAndValue.IndexOf (separator);
if (idx < 0 || idx == nameAndValue.Length - 1)
return null;
var val = nameAndValue.Substring (idx + 1).Trim ();
return unquote ? val.Unquote () : val;
}
internal static byte[] InternalToByteArray (this ushort value, ByteOrder order)
{
var bytes = BitConverter.GetBytes (value);
if (!order.IsHostOrder ())
Array.Reverse (bytes);
return bytes;
}
internal static byte[] InternalToByteArray (this ulong value, ByteOrder order)
{
var bytes = BitConverter.GetBytes (value);
if (!order.IsHostOrder ())
Array.Reverse (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 > 0x7 && opcode < 0x10;
}
internal static bool IsControl (this Opcode opcode)
{
return opcode >= Opcode.Close;
}
internal static bool IsData (this byte opcode)
{
return opcode == 0x1 || opcode == 0x2;
}
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 == 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)
{
var len = value.Length;
for (var i = 0; i < len; i++)
{
var c = value[i];
if (c < 0x20)
{
if ("\r\n\t".IndexOf (c) == -1)
return false;
if (c == '\n')
{
i++;
if (i == len)
break;
c = value[i];
if (" \t".IndexOf (c) == -1)
return false;
}
continue;
}
if (c == 0x7f)
return false;
}
return true;
}
internal static bool IsToken (this string value)
{
foreach (var c in value)
{
if (c < 0x20)
return false;
if (c > 0x7e)
return false;
if (_tspecials.IndexOf (c) > -1)
return false;
}
return true;
}
internal static bool KeepsAlive (this NameValueCollection headers, Version version)
{
var comparison = StringComparison.OrdinalIgnoreCase;
return version < HttpVersion.Version11 ? headers.Contains ("Connection", "keep-alive", comparison) : !headers.Contains ("Connection", "close", comparison);
}
internal static string Quote (this string value)
{
return String.Format ("\"{0}\"", value.Replace ("\"", "\\\""));
}
internal static byte[] ReadBytes (this Stream stream, int length)
{
var buff = new byte[length];
var offset = 0;
try
{
var nread = 0;
while (length > 0)
{
nread = stream.Read (buff, offset, length);
if (nread == 0)
break;
offset += nread;
length -= nread;
}
}
catch
{
}
return buff.SubArray (0, offset);
}
internal static byte[] ReadBytes (this Stream stream, long length, int bufferLength)
{
using (var dest = new MemoryStream ())
{
try
{
var buff = new byte[bufferLength];
var nread = 0;
while (length > 0)
{
if (length < bufferLength)
bufferLength = (int)length;
nread = stream.Read (buff, 0, bufferLength);
if (nread == 0)
break;
dest.Write (buff, 0, nread);
length -= nread;
}
}
catch
{
}
dest.Close ();
return dest.ToArray ();
}
}
internal static void ReadBytesAsync (this Stream stream, int length, Action<byte[]> completed, Action<Exception> error)
{
var buff = new byte[length];
var offset = 0;
var retry = 0;
AsyncCallback callback = null;
callback = ar =>
{
try
{
var nread = stream.EndRead (ar);
if (nread == 0 && length != 0 && retry < _retry)
{
retry++;
stream.BeginRead (buff, offset, length, callback, null);
return;
}
if (nread == 0 || nread == length)
{
if (completed != null)
completed (buff.SubArray (0, offset + nread));
return;
}
retry = 0;
offset += nread;
length -= nread;
stream.BeginRead (buff, offset, length, callback, null);
}
catch (Exception ex)
{
if (error != null)
error (ex);
}
};
try
{
stream.BeginRead (buff, offset, length, callback, null);
}
catch (Exception ex)
{
if (error != null)
error (ex);
}
}
internal static void ReadBytesAsync (this Stream stream, long length, int bufferLength, Action<byte[]> completed, Action<Exception> error)
{
var dest = new MemoryStream ();
var buff = new byte[bufferLength];
var retry = 0;
Action<long> read = null;
read = len =>
{
if (len < bufferLength)
bufferLength = (int)len;
stream.BeginRead (buff, 0, bufferLength, ar =>
{
try
{
var nread = stream.EndRead (ar);
if (nread > 0)
dest.Write (buff, 0, nread);
if (nread == 0 && retry < _retry)
{
retry++;
read (len);
return;
}
if (nread == 0 || nread == len)
{
if (completed != null)
{
dest.Close ();
completed (dest.ToArray ());
}
dest.Dispose ();
return;
}
retry = 0;
read (len - nread);
}
catch (Exception ex)
{
dest.Dispose ();
if (error != null)
error (ex);
}
}, null);
};
try
{
read (length);
}
catch (Exception ex)
{
dest.Dispose ();
if (error != null)
error (ex);
}
}
internal static T[] Reverse<T> (this T[] array)
{
var len = array.Length;
var ret = new T[len];
var end = len - 1;
for (var i = 0; i <= end; i++)
ret[i] = array[end - i];
return ret;
}
internal static IEnumerable<string> SplitHeaderValue (this string value, params char[] separators)
{
var len = value.Length;
var buff = new StringBuilder (32);
var end = len - 1;
var escaped = false;
var quoted = false;
for (var i = 0; i <= end; i++)
{
var c = value[i];
buff.Append (c);
if (c == '"')
{
if (escaped)
{
escaped = false;
continue;
}
quoted = !quoted;
continue;
}
if (c == '\\')
{
if (i == end)
break;
if (value[i + 1] == '"')
escaped = true;
}
if (Array.IndexOf (separators, c) > -1)
{
if (quoted)
continue;
buff.Length -= 1;
yield return buff.ToString ();
buff.Length = 0;
}
}
yield return buff.ToString ();
}
internal static byte[] ToByteArray (this Stream stream)
{
using (var output = new MemoryStream ())
You can’t perform that action at this time.