1338 lines
39 KiB
C#
1338 lines
39 KiB
C#
#region License
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/*
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* HttpUtility.cs
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*
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* This code is derived from System.Net.HttpUtility.cs of Mono
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* (http://www.mono-project.com).
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*
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* The MIT License
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*
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* Copyright (c) 2005-2009 Novell, Inc. (http://www.novell.com)
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* Copyright (c) 2012-2013 sta.blockhead
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#endregion
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#region Authors
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/*
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* Authors:
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* Patrik Torstensson <Patrik.Torstensson@labs2.com>
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* Wictor Wilén (decode/encode functions) <wictor@ibizkit.se>
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* Tim Coleman <tim@timcoleman.com>
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* Gonzalo Paniagua Javier <gonzalo@ximian.com>
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*/
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#endregion
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using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.Collections.Specialized;
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using System.Globalization;
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using System.IO;
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using System.Text;
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using System.Security.Cryptography;
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namespace WebSocketSharp.Net
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{
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internal sealed class HttpUtility
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{
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sealed class HttpQSCollection : NameValueCollection
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{
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public override string ToString ()
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{
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var count = Count;
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if (count == 0)
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return String.Empty;
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var output = new StringBuilder ();
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var keys = AllKeys;
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foreach (var key in keys)
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output.AppendFormat ("{0}={1}&", key, this [key]);
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if (output.Length > 0)
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output.Length--;
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return output.ToString ();
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}
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}
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#region Private Static Fields
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private static Dictionary<string, char> _entities;
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private static char [] _hexChars = "0123456789abcdef".ToCharArray ();
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private static object _sync = new object ();
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#endregion
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#region Private Static Properties
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private static Dictionary<string, char> Entities {
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get {
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lock (_sync) {
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if (_entities == null)
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InitEntities ();
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return _entities;
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}
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}
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}
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#endregion
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#region Private Methods
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private static string A1 (string username, string password, string realm)
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{
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return String.Format ("{0}:{1}:{2}", username, realm, password);
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}
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private static string A1 (
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string username,
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string password,
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string realm,
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string nonce,
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string cnonce)
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{
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return String.Format (
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"{0}:{1}:{2}", Hash (A1 (username, password, realm)), nonce, cnonce);
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}
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private static string A2 (string method, string uri)
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{
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return String.Format ("{0}:{1}", method, uri);
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}
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private static string A2 (string method, string uri, string entity)
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{
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return String.Format ("{0}:{1}:{2}", method, uri, entity);
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}
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private static int GetChar (byte [] bytes, int offset, int length)
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{
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var value = 0;
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var end = length + offset;
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int current;
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for (int i = offset; i < end; i++) {
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current = GetInt (bytes [i]);
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if (current == -1)
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return -1;
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value = (value << 4) + current;
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}
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return value;
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}
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private static int GetChar (string s, int offset, int length)
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{
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var value = 0;
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var end = length + offset;
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char c;
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int current;
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for (int i = offset; i < end; i++) {
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c = s [i];
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if (c > 127)
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return -1;
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current = GetInt ((byte) c);
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if (current == -1)
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return -1;
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value = (value << 4) + current;
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}
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return value;
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}
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private static char [] GetChars (MemoryStream buffer, Encoding encoding)
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{
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return encoding.GetChars (buffer.GetBuffer (), 0, (int) buffer.Length);
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}
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private static int GetInt (byte b)
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{
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var c = (char) b;
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return c >= '0' && c <= '9'
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? c - '0'
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: c >= 'a' && c <= 'f'
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? c - 'a' + 10
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: c >= 'A' && c <= 'F'
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? c - 'A' + 10
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: -1;
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}
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private static string Hash (string value)
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{
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var md5 = MD5.Create ();
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var src = Encoding.UTF8.GetBytes (value);
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var hashed = md5.ComputeHash (src);
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var result = new StringBuilder (64);
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foreach (var b in hashed)
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result.Append (b.ToString ("x2"));
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return result.ToString ();
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}
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private static void InitEntities ()
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{
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// Build the dictionary of HTML entity references.
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// This list comes from the HTML 4.01 W3C recommendation.
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_entities = new Dictionary<string, char> ();
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_entities.Add ("nbsp", '\u00A0');
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_entities.Add ("iexcl", '\u00A1');
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_entities.Add ("cent", '\u00A2');
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_entities.Add ("pound", '\u00A3');
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_entities.Add ("curren", '\u00A4');
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_entities.Add ("yen", '\u00A5');
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_entities.Add ("brvbar", '\u00A6');
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_entities.Add ("sect", '\u00A7');
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_entities.Add ("uml", '\u00A8');
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_entities.Add ("copy", '\u00A9');
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_entities.Add ("ordf", '\u00AA');
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_entities.Add ("laquo", '\u00AB');
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_entities.Add ("not", '\u00AC');
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_entities.Add ("shy", '\u00AD');
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_entities.Add ("reg", '\u00AE');
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_entities.Add ("macr", '\u00AF');
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_entities.Add ("deg", '\u00B0');
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_entities.Add ("plusmn", '\u00B1');
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_entities.Add ("sup2", '\u00B2');
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_entities.Add ("sup3", '\u00B3');
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_entities.Add ("acute", '\u00B4');
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_entities.Add ("micro", '\u00B5');
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_entities.Add ("para", '\u00B6');
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_entities.Add ("middot", '\u00B7');
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_entities.Add ("cedil", '\u00B8');
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_entities.Add ("sup1", '\u00B9');
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_entities.Add ("ordm", '\u00BA');
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_entities.Add ("raquo", '\u00BB');
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_entities.Add ("frac14", '\u00BC');
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_entities.Add ("frac12", '\u00BD');
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_entities.Add ("frac34", '\u00BE');
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_entities.Add ("iquest", '\u00BF');
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_entities.Add ("Agrave", '\u00C0');
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_entities.Add ("Aacute", '\u00C1');
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_entities.Add ("Acirc", '\u00C2');
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_entities.Add ("Atilde", '\u00C3');
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_entities.Add ("Auml", '\u00C4');
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_entities.Add ("Aring", '\u00C5');
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_entities.Add ("AElig", '\u00C6');
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_entities.Add ("Ccedil", '\u00C7');
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_entities.Add ("Egrave", '\u00C8');
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_entities.Add ("Eacute", '\u00C9');
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_entities.Add ("Ecirc", '\u00CA');
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_entities.Add ("Euml", '\u00CB');
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_entities.Add ("Igrave", '\u00CC');
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_entities.Add ("Iacute", '\u00CD');
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_entities.Add ("Icirc", '\u00CE');
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_entities.Add ("Iuml", '\u00CF');
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_entities.Add ("ETH", '\u00D0');
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_entities.Add ("Ntilde", '\u00D1');
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_entities.Add ("Ograve", '\u00D2');
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_entities.Add ("Oacute", '\u00D3');
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_entities.Add ("Ocirc", '\u00D4');
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_entities.Add ("Otilde", '\u00D5');
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_entities.Add ("Ouml", '\u00D6');
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_entities.Add ("times", '\u00D7');
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_entities.Add ("Oslash", '\u00D8');
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_entities.Add ("Ugrave", '\u00D9');
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_entities.Add ("Uacute", '\u00DA');
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_entities.Add ("Ucirc", '\u00DB');
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_entities.Add ("Uuml", '\u00DC');
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_entities.Add ("Yacute", '\u00DD');
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_entities.Add ("THORN", '\u00DE');
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_entities.Add ("szlig", '\u00DF');
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_entities.Add ("agrave", '\u00E0');
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_entities.Add ("aacute", '\u00E1');
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_entities.Add ("acirc", '\u00E2');
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_entities.Add ("atilde", '\u00E3');
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_entities.Add ("auml", '\u00E4');
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_entities.Add ("aring", '\u00E5');
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_entities.Add ("aelig", '\u00E6');
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_entities.Add ("ccedil", '\u00E7');
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_entities.Add ("egrave", '\u00E8');
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_entities.Add ("eacute", '\u00E9');
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_entities.Add ("ecirc", '\u00EA');
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_entities.Add ("euml", '\u00EB');
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_entities.Add ("igrave", '\u00EC');
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_entities.Add ("iacute", '\u00ED');
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_entities.Add ("icirc", '\u00EE');
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_entities.Add ("iuml", '\u00EF');
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_entities.Add ("eth", '\u00F0');
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_entities.Add ("ntilde", '\u00F1');
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_entities.Add ("ograve", '\u00F2');
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_entities.Add ("oacute", '\u00F3');
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_entities.Add ("ocirc", '\u00F4');
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_entities.Add ("otilde", '\u00F5');
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_entities.Add ("ouml", '\u00F6');
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_entities.Add ("divide", '\u00F7');
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_entities.Add ("oslash", '\u00F8');
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_entities.Add ("ugrave", '\u00F9');
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_entities.Add ("uacute", '\u00FA');
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_entities.Add ("ucirc", '\u00FB');
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_entities.Add ("uuml", '\u00FC');
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_entities.Add ("yacute", '\u00FD');
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_entities.Add ("thorn", '\u00FE');
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_entities.Add ("yuml", '\u00FF');
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_entities.Add ("fnof", '\u0192');
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_entities.Add ("Alpha", '\u0391');
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_entities.Add ("Beta", '\u0392');
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_entities.Add ("Gamma", '\u0393');
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_entities.Add ("Delta", '\u0394');
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_entities.Add ("Epsilon", '\u0395');
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_entities.Add ("Zeta", '\u0396');
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_entities.Add ("Eta", '\u0397');
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_entities.Add ("Theta", '\u0398');
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_entities.Add ("Iota", '\u0399');
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_entities.Add ("Kappa", '\u039A');
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_entities.Add ("Lambda", '\u039B');
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_entities.Add ("Mu", '\u039C');
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_entities.Add ("Nu", '\u039D');
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_entities.Add ("Xi", '\u039E');
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_entities.Add ("Omicron", '\u039F');
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_entities.Add ("Pi", '\u03A0');
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_entities.Add ("Rho", '\u03A1');
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_entities.Add ("Sigma", '\u03A3');
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_entities.Add ("Tau", '\u03A4');
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_entities.Add ("Upsilon", '\u03A5');
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_entities.Add ("Phi", '\u03A6');
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_entities.Add ("Chi", '\u03A7');
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_entities.Add ("Psi", '\u03A8');
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_entities.Add ("Omega", '\u03A9');
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_entities.Add ("alpha", '\u03B1');
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_entities.Add ("beta", '\u03B2');
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_entities.Add ("gamma", '\u03B3');
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_entities.Add ("delta", '\u03B4');
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_entities.Add ("epsilon", '\u03B5');
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_entities.Add ("zeta", '\u03B6');
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_entities.Add ("eta", '\u03B7');
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_entities.Add ("theta", '\u03B8');
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_entities.Add ("iota", '\u03B9');
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_entities.Add ("kappa", '\u03BA');
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_entities.Add ("lambda", '\u03BB');
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_entities.Add ("mu", '\u03BC');
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_entities.Add ("nu", '\u03BD');
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_entities.Add ("xi", '\u03BE');
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_entities.Add ("omicron", '\u03BF');
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_entities.Add ("pi", '\u03C0');
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_entities.Add ("rho", '\u03C1');
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_entities.Add ("sigmaf", '\u03C2');
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_entities.Add ("sigma", '\u03C3');
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_entities.Add ("tau", '\u03C4');
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_entities.Add ("upsilon", '\u03C5');
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_entities.Add ("phi", '\u03C6');
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_entities.Add ("chi", '\u03C7');
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_entities.Add ("psi", '\u03C8');
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_entities.Add ("omega", '\u03C9');
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_entities.Add ("thetasym", '\u03D1');
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_entities.Add ("upsih", '\u03D2');
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_entities.Add ("piv", '\u03D6');
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_entities.Add ("bull", '\u2022');
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_entities.Add ("hellip", '\u2026');
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_entities.Add ("prime", '\u2032');
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_entities.Add ("Prime", '\u2033');
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_entities.Add ("oline", '\u203E');
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_entities.Add ("frasl", '\u2044');
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_entities.Add ("weierp", '\u2118');
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_entities.Add ("image", '\u2111');
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_entities.Add ("real", '\u211C');
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_entities.Add ("trade", '\u2122');
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_entities.Add ("alefsym", '\u2135');
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_entities.Add ("larr", '\u2190');
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_entities.Add ("uarr", '\u2191');
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_entities.Add ("rarr", '\u2192');
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_entities.Add ("darr", '\u2193');
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_entities.Add ("harr", '\u2194');
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_entities.Add ("crarr", '\u21B5');
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_entities.Add ("lArr", '\u21D0');
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_entities.Add ("uArr", '\u21D1');
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_entities.Add ("rArr", '\u21D2');
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_entities.Add ("dArr", '\u21D3');
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_entities.Add ("hArr", '\u21D4');
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_entities.Add ("forall", '\u2200');
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_entities.Add ("part", '\u2202');
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_entities.Add ("exist", '\u2203');
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_entities.Add ("empty", '\u2205');
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_entities.Add ("nabla", '\u2207');
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_entities.Add ("isin", '\u2208');
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_entities.Add ("notin", '\u2209');
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_entities.Add ("ni", '\u220B');
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_entities.Add ("prod", '\u220F');
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_entities.Add ("sum", '\u2211');
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_entities.Add ("minus", '\u2212');
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_entities.Add ("lowast", '\u2217');
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_entities.Add ("radic", '\u221A');
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_entities.Add ("prop", '\u221D');
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_entities.Add ("infin", '\u221E');
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_entities.Add ("ang", '\u2220');
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_entities.Add ("and", '\u2227');
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_entities.Add ("or", '\u2228');
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_entities.Add ("cap", '\u2229');
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_entities.Add ("cup", '\u222A');
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_entities.Add ("int", '\u222B');
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_entities.Add ("there4", '\u2234');
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_entities.Add ("sim", '\u223C');
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_entities.Add ("cong", '\u2245');
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_entities.Add ("asymp", '\u2248');
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_entities.Add ("ne", '\u2260');
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_entities.Add ("equiv", '\u2261');
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_entities.Add ("le", '\u2264');
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_entities.Add ("ge", '\u2265');
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_entities.Add ("sub", '\u2282');
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_entities.Add ("sup", '\u2283');
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_entities.Add ("nsub", '\u2284');
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_entities.Add ("sube", '\u2286');
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_entities.Add ("supe", '\u2287');
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_entities.Add ("oplus", '\u2295');
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|
_entities.Add ("otimes", '\u2297');
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_entities.Add ("perp", '\u22A5');
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|
_entities.Add ("sdot", '\u22C5');
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|
_entities.Add ("lceil", '\u2308');
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|
_entities.Add ("rceil", '\u2309');
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|
_entities.Add ("lfloor", '\u230A');
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|
_entities.Add ("rfloor", '\u230B');
|
|
_entities.Add ("lang", '\u2329');
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|
_entities.Add ("rang", '\u232A');
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|
_entities.Add ("loz", '\u25CA');
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_entities.Add ("spades", '\u2660');
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_entities.Add ("clubs", '\u2663');
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_entities.Add ("hearts", '\u2665');
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_entities.Add ("diams", '\u2666');
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_entities.Add ("quot", '\u0022');
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_entities.Add ("amp", '\u0026');
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_entities.Add ("lt", '\u003C');
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_entities.Add ("gt", '\u003E');
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_entities.Add ("OElig", '\u0152');
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_entities.Add ("oelig", '\u0153');
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_entities.Add ("Scaron", '\u0160');
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_entities.Add ("scaron", '\u0161');
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_entities.Add ("Yuml", '\u0178');
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_entities.Add ("circ", '\u02C6');
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_entities.Add ("tilde", '\u02DC');
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|
_entities.Add ("ensp", '\u2002');
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_entities.Add ("emsp", '\u2003');
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|
_entities.Add ("thinsp", '\u2009');
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_entities.Add ("zwnj", '\u200C');
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_entities.Add ("zwj", '\u200D');
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_entities.Add ("lrm", '\u200E');
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_entities.Add ("rlm", '\u200F');
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_entities.Add ("ndash", '\u2013');
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_entities.Add ("mdash", '\u2014');
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_entities.Add ("lsquo", '\u2018');
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_entities.Add ("rsquo", '\u2019');
|
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_entities.Add ("sbquo", '\u201A');
|
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_entities.Add ("ldquo", '\u201C');
|
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_entities.Add ("rdquo", '\u201D');
|
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_entities.Add ("bdquo", '\u201E');
|
|
_entities.Add ("dagger", '\u2020');
|
|
_entities.Add ("Dagger", '\u2021');
|
|
_entities.Add ("permil", '\u2030');
|
|
_entities.Add ("lsaquo", '\u2039');
|
|
_entities.Add ("rsaquo", '\u203A');
|
|
_entities.Add ("euro", '\u20AC');
|
|
}
|
|
|
|
private static string KD (string secret, string data)
|
|
{
|
|
return Hash (String.Format ("{0}:{1}", secret, data));
|
|
}
|
|
|
|
private static bool NotEncoded (char c)
|
|
{
|
|
return c == '!' ||
|
|
c == '\'' ||
|
|
c == '(' ||
|
|
c == ')' ||
|
|
c == '*' ||
|
|
c == '-' ||
|
|
c == '.' ||
|
|
c == '_';
|
|
}
|
|
|
|
private static void UrlEncodeChar (char c, Stream result, bool isUnicode)
|
|
{
|
|
if (c > 255) {
|
|
// FIXME: What happens when there is an internal error ?
|
|
//if (!isUnicode)
|
|
// throw new ArgumentOutOfRangeException ("c", c, "c must be less than 256.");
|
|
result.WriteByte ((byte) '%');
|
|
result.WriteByte ((byte) 'u');
|
|
var i = (int) c;
|
|
var idx = i >> 12;
|
|
result.WriteByte ((byte) _hexChars [idx]);
|
|
idx = (i >> 8) & 0x0F;
|
|
result.WriteByte ((byte) _hexChars [idx]);
|
|
idx = (i >> 4) & 0x0F;
|
|
result.WriteByte ((byte) _hexChars [idx]);
|
|
idx = i & 0x0F;
|
|
result.WriteByte ((byte) _hexChars [idx]);
|
|
|
|
return;
|
|
}
|
|
|
|
if (c > ' ' && NotEncoded (c)) {
|
|
result.WriteByte ((byte) c);
|
|
return;
|
|
}
|
|
|
|
if (c == ' ') {
|
|
result.WriteByte ((byte) '+');
|
|
return;
|
|
}
|
|
|
|
if ((c < '0') ||
|
|
(c < 'A' && c > '9') ||
|
|
(c > 'Z' && c < 'a') ||
|
|
(c > 'z')) {
|
|
if (isUnicode && c > 127) {
|
|
result.WriteByte ((byte) '%');
|
|
result.WriteByte ((byte) 'u');
|
|
result.WriteByte ((byte) '0');
|
|
result.WriteByte ((byte) '0');
|
|
}
|
|
else
|
|
result.WriteByte ((byte) '%');
|
|
|
|
var idx = ((int) c) >> 4;
|
|
result.WriteByte ((byte) _hexChars [idx]);
|
|
idx = ((int) c) & 0x0F;
|
|
result.WriteByte ((byte) _hexChars [idx]);
|
|
}
|
|
else
|
|
result.WriteByte ((byte) c);
|
|
}
|
|
|
|
private static void UrlPathEncodeChar (char c, Stream result)
|
|
{
|
|
if (c < 33 || c > 126) {
|
|
var bytes = Encoding.UTF8.GetBytes (c.ToString ());
|
|
int i;
|
|
foreach (var b in bytes) {
|
|
result.WriteByte ((byte) '%');
|
|
i = ((int) b) >> 4;
|
|
result.WriteByte ((byte) _hexChars [i]);
|
|
i = ((int) b) & 0x0F;
|
|
result.WriteByte ((byte) _hexChars [i]);
|
|
}
|
|
}
|
|
else if (c == ' ') {
|
|
result.WriteByte ((byte) '%');
|
|
result.WriteByte ((byte) '2');
|
|
result.WriteByte ((byte) '0');
|
|
}
|
|
else
|
|
result.WriteByte ((byte) c);
|
|
}
|
|
|
|
private static void WriteCharBytes (IList buffer, char c, Encoding encoding)
|
|
{
|
|
if (c > 255)
|
|
foreach (var b in encoding.GetBytes (new char[] { c }))
|
|
buffer.Add (b);
|
|
else
|
|
buffer.Add ((byte) c);
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region Internal Methods
|
|
|
|
internal static string CreateBasicAuthChallenge (string realm)
|
|
{
|
|
return String.Format ("Basic realm=\"{0}\"", realm);
|
|
}
|
|
|
|
internal static string CreateBasicAuthCredentials (
|
|
string username, string password)
|
|
{
|
|
var userPass = String.Format ("{0}:{1}", username, password);
|
|
var base64UserPass = Convert.ToBase64String (
|
|
Encoding.UTF8.GetBytes (userPass));
|
|
|
|
return "Basic " + base64UserPass;
|
|
}
|
|
|
|
internal static string CreateDigestAuthChallenge (string realm)
|
|
{
|
|
var nonce = CreateNonceValue ();
|
|
var algorithm = "MD5";
|
|
var qop = "auth";
|
|
|
|
return String.Format (
|
|
"Digest realm=\"{0}\", nonce=\"{1}\", algorithm={2}, qop=\"{3}\"",
|
|
realm,
|
|
nonce,
|
|
algorithm,
|
|
qop);
|
|
}
|
|
|
|
internal static string CreateDigestAuthCredentials (
|
|
NameValueCollection authParams)
|
|
{
|
|
var digestRes = new StringBuilder (64);
|
|
digestRes.AppendFormat ("username=\"{0}\"", authParams ["username"]);
|
|
digestRes.AppendFormat (", realm=\"{0}\"", authParams ["realm"]);
|
|
digestRes.AppendFormat (", nonce=\"{0}\"", authParams ["nonce"]);
|
|
digestRes.AppendFormat (", uri=\"{0}\"", authParams ["uri"]);
|
|
|
|
var algorithm = authParams ["algorithm"];
|
|
if (algorithm != null)
|
|
digestRes.AppendFormat (", algorithm={0}", algorithm);
|
|
|
|
digestRes.AppendFormat (", response=\"{0}\"", authParams ["response"]);
|
|
|
|
var qop = authParams ["qop"];
|
|
if (qop != null) {
|
|
digestRes.AppendFormat (", qop={0}", qop);
|
|
digestRes.AppendFormat (", nc={0}", authParams ["nc"]);
|
|
digestRes.AppendFormat (", cnonce=\"{0}\"", authParams ["cnonce"]);
|
|
}
|
|
|
|
var opaque = authParams ["opaque"];
|
|
if (opaque != null)
|
|
digestRes.AppendFormat (", opaque=\"{0}\"", opaque);
|
|
|
|
return "Digest " + digestRes.ToString ();
|
|
}
|
|
|
|
internal static string CreateNonceValue ()
|
|
{
|
|
var src = new byte [16];
|
|
var rand = new Random ();
|
|
rand.NextBytes (src);
|
|
var nonce = new StringBuilder (32);
|
|
foreach (var b in src)
|
|
nonce.Append (b.ToString ("x2"));
|
|
|
|
return nonce.ToString ();
|
|
}
|
|
|
|
internal static string CreateRequestDigest (NameValueCollection parameters)
|
|
{
|
|
var username = parameters ["username"];
|
|
var password = parameters ["password"];
|
|
var realm = parameters ["realm"];
|
|
var nonce = parameters ["nonce"];
|
|
var uri = parameters ["uri"];
|
|
var algorithm = parameters ["algorithm"];
|
|
var qop = parameters ["qop"];
|
|
var nc = parameters ["nc"];
|
|
var cnonce = parameters ["cnonce"];
|
|
var method = parameters ["method"];
|
|
|
|
var a1 = algorithm != null && algorithm.ToLower () == "md5-sess"
|
|
? A1 (username, password, realm, nonce, cnonce)
|
|
: A1 (username, password, realm);
|
|
|
|
var a2 = qop != null && qop.ToLower () == "auth-int"
|
|
? A2 (method, uri, parameters ["entity"])
|
|
: A2 (method, uri);
|
|
|
|
var secret = Hash (a1);
|
|
var data = qop != null
|
|
? String.Format ("{0}:{1}:{2}:{3}:{4}", nonce, nc, cnonce, qop, Hash (a2))
|
|
: String.Format ("{0}:{1}", nonce, Hash (a2));
|
|
|
|
return KD (secret, data);
|
|
}
|
|
|
|
internal static void ParseQueryString (string query, Encoding encoding, NameValueCollection result)
|
|
{
|
|
if (query.Length == 0)
|
|
return;
|
|
|
|
var decoded = HtmlDecode (query);
|
|
var decodedLength = decoded.Length;
|
|
var namePos = 0;
|
|
var first = true;
|
|
while (namePos <= decodedLength) {
|
|
int valuePos = -1, valueEnd = -1;
|
|
for (int q = namePos; q < decodedLength; q++) {
|
|
if (valuePos == -1 && decoded [q] == '=') {
|
|
valuePos = q + 1;
|
|
}
|
|
else if (decoded [q] == '&') {
|
|
valueEnd = q;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (first) {
|
|
first = false;
|
|
if (decoded [namePos] == '?')
|
|
namePos++;
|
|
}
|
|
|
|
string name, value;
|
|
if (valuePos == -1) {
|
|
name = null;
|
|
valuePos = namePos;
|
|
}
|
|
else {
|
|
name = UrlDecode (decoded.Substring (namePos, valuePos - namePos - 1), encoding);
|
|
}
|
|
|
|
if (valueEnd < 0) {
|
|
namePos = -1;
|
|
valueEnd = decoded.Length;
|
|
}
|
|
else {
|
|
namePos = valueEnd + 1;
|
|
}
|
|
|
|
value = UrlDecode (decoded.Substring (valuePos, valueEnd - valuePos), encoding);
|
|
result.Add (name, value);
|
|
if (namePos == -1)
|
|
break;
|
|
}
|
|
}
|
|
|
|
internal static string UrlDecodeInternal (byte [] bytes, int offset, int count, Encoding encoding)
|
|
{
|
|
var output = new StringBuilder ();
|
|
var acc = new MemoryStream ();
|
|
var end = count + offset;
|
|
int xchar;
|
|
for (int i = offset; i < end; i++) {
|
|
if (bytes [i] == '%' && i + 2 < count && bytes [i + 1] != '%') {
|
|
if (bytes [i + 1] == (byte) 'u' && i + 5 < end) {
|
|
if (acc.Length > 0) {
|
|
output.Append (GetChars (acc, encoding));
|
|
acc.SetLength (0);
|
|
}
|
|
|
|
xchar = GetChar (bytes, i + 2, 4);
|
|
if (xchar != -1) {
|
|
output.Append ((char) xchar);
|
|
i += 5;
|
|
|
|
continue;
|
|
}
|
|
}
|
|
else if ((xchar = GetChar (bytes, i + 1, 2)) != -1) {
|
|
acc.WriteByte ((byte) xchar);
|
|
i += 2;
|
|
|
|
continue;
|
|
}
|
|
}
|
|
|
|
if (acc.Length > 0) {
|
|
output.Append (GetChars (acc, encoding));
|
|
acc.SetLength (0);
|
|
}
|
|
|
|
if (bytes [i] == '+') {
|
|
output.Append (' ');
|
|
}
|
|
else {
|
|
output.Append ((char) bytes [i]);
|
|
}
|
|
}
|
|
|
|
if (acc.Length > 0) {
|
|
output.Append (GetChars (acc, encoding));
|
|
}
|
|
|
|
acc = null;
|
|
return output.ToString ();
|
|
}
|
|
|
|
internal static byte [] UrlDecodeToBytesInternal (byte [] bytes, int offset, int count)
|
|
{
|
|
var result = new MemoryStream ();
|
|
var end = offset + count;
|
|
char c;
|
|
int xchar;
|
|
for (int i = offset; i < end; i++) {
|
|
c = (char) bytes [i];
|
|
if (c == '+') {
|
|
c = ' ';
|
|
}
|
|
else if (c == '%' && i < end - 2) {
|
|
xchar = GetChar (bytes, i + 1, 2);
|
|
if (xchar != -1) {
|
|
c = (char) xchar;
|
|
i += 2;
|
|
}
|
|
}
|
|
|
|
result.WriteByte ((byte) c);
|
|
}
|
|
|
|
return result.ToArray ();
|
|
}
|
|
|
|
internal static byte [] UrlEncodeToBytesInternal (byte [] bytes, int offset, int count)
|
|
{
|
|
var result = new MemoryStream (count);
|
|
var end = offset + count;
|
|
for (int i = offset; i < end; i++)
|
|
UrlEncodeChar ((char) bytes [i], result, false);
|
|
|
|
return result.ToArray ();
|
|
}
|
|
|
|
internal static byte [] UrlEncodeUnicodeToBytesInternal (string s)
|
|
{
|
|
var result = new MemoryStream (s.Length);
|
|
foreach (var c in s)
|
|
UrlEncodeChar (c, result, true);
|
|
|
|
return result.ToArray ();
|
|
}
|
|
|
|
#endregion
|
|
|
|
#region Public Methods
|
|
|
|
public static string HtmlAttributeEncode (string s)
|
|
{
|
|
if (s == null || s.Length == 0 || !s.Contains ('&', '"', '<', '>'))
|
|
return s;
|
|
|
|
var output = new StringBuilder ();
|
|
foreach (var c in s)
|
|
output.Append (
|
|
c == '&'
|
|
? "&"
|
|
: c == '"'
|
|
? """
|
|
: c == '<'
|
|
? "<"
|
|
: c == '>'
|
|
? ">"
|
|
: c.ToString ()
|
|
);
|
|
|
|
return output.ToString ();
|
|
}
|
|
|
|
public static void HtmlAttributeEncode (string s, TextWriter output)
|
|
{
|
|
if (output == null)
|
|
throw new ArgumentNullException ("output");
|
|
|
|
output.Write (HtmlAttributeEncode (s));
|
|
}
|
|
|
|
/// <summary>
|
|
/// Decodes an HTML-encoded <see cref="string"/> and returns the decoded <see cref="string"/>.
|
|
/// </summary>
|
|
/// <returns>
|
|
/// A <see cref="string"/> that contains the decoded string.
|
|
/// </returns>
|
|
/// <param name="s">
|
|
/// A <see cref="string"/> to decode.
|
|
/// </param>
|
|
public static string HtmlDecode (string s)
|
|
{
|
|
if (s == null || s.Length == 0 || !s.Contains ('&'))
|
|
return s;
|
|
|
|
var entity = new StringBuilder ();
|
|
var output = new StringBuilder ();
|
|
// 0 -> nothing,
|
|
// 1 -> right after '&'
|
|
// 2 -> between '&' and ';' but no '#'
|
|
// 3 -> '#' found after '&' and getting numbers
|
|
var state = 0;
|
|
var number = 0;
|
|
var haveTrailingDigits = false;
|
|
foreach (var c in s) {
|
|
if (state == 0) {
|
|
if (c == '&') {
|
|
entity.Append (c);
|
|
state = 1;
|
|
}
|
|
else {
|
|
output.Append (c);
|
|
}
|
|
|
|
continue;
|
|
}
|
|
|
|
if (c == '&') {
|
|
state = 1;
|
|
if (haveTrailingDigits) {
|
|
entity.Append (number.ToString (CultureInfo.InvariantCulture));
|
|
haveTrailingDigits = false;
|
|
}
|
|
|
|
output.Append (entity.ToString ());
|
|
entity.Length = 0;
|
|
entity.Append ('&');
|
|
|
|
continue;
|
|
}
|
|
|
|
if (state == 1) {
|
|
if (c == ';') {
|
|
state = 0;
|
|
output.Append (entity.ToString ());
|
|
output.Append (c);
|
|
entity.Length = 0;
|
|
}
|
|
else {
|
|
number = 0;
|
|
if (c != '#') {
|
|
state = 2;
|
|
}
|
|
else {
|
|
state = 3;
|
|
}
|
|
|
|
entity.Append (c);
|
|
}
|
|
}
|
|
else if (state == 2) {
|
|
entity.Append (c);
|
|
if (c == ';') {
|
|
var key = entity.ToString ();
|
|
if (key.Length > 1 && Entities.ContainsKey (key.Substring (1, key.Length - 2)))
|
|
key = Entities [key.Substring (1, key.Length - 2)].ToString ();
|
|
|
|
output.Append (key);
|
|
state = 0;
|
|
entity.Length = 0;
|
|
}
|
|
}
|
|
else if (state == 3) {
|
|
if (c == ';') {
|
|
if (number > 65535) {
|
|
output.Append ("&#");
|
|
output.Append (number.ToString (CultureInfo.InvariantCulture));
|
|
output.Append (";");
|
|
}
|
|
else {
|
|
output.Append ((char) number);
|
|
}
|
|
|
|
state = 0;
|
|
entity.Length = 0;
|
|
haveTrailingDigits = false;
|
|
}
|
|
else if (Char.IsDigit (c)) {
|
|
number = number * 10 + ((int) c - '0');
|
|
haveTrailingDigits = true;
|
|
}
|
|
else {
|
|
state = 2;
|
|
if (haveTrailingDigits) {
|
|
entity.Append (number.ToString (CultureInfo.InvariantCulture));
|
|
haveTrailingDigits = false;
|
|
}
|
|
|
|
entity.Append (c);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (entity.Length > 0) {
|
|
output.Append (entity.ToString ());
|
|
}
|
|
else if (haveTrailingDigits) {
|
|
output.Append (number.ToString (CultureInfo.InvariantCulture));
|
|
}
|
|
|
|
return output.ToString ();
|
|
}
|
|
|
|
/// <summary>
|
|
/// Decodes an HTML-encoded <see cref="string"/> and sends the decoded <see cref="string"/>
|
|
/// to a <see cref="TextWriter"/>.
|
|
/// </summary>
|
|
/// <param name="s">
|
|
/// A <see cref="string"/> to decode.
|
|
/// </param>
|
|
/// <param name="output">
|
|
/// A <see cref="TextWriter"/> that receives the decoded <see cref="string"/>.
|
|
/// </param>
|
|
public static void HtmlDecode (string s, TextWriter output)
|
|
{
|
|
if (output == null)
|
|
throw new ArgumentNullException ("output");
|
|
|
|
output.Write (HtmlDecode (s));
|
|
}
|
|
|
|
/// <summary>
|
|
/// HTML-encodes a <see cref="string"/> and returns the encoded <see cref="string"/>.
|
|
/// </summary>
|
|
/// <returns>
|
|
/// A <see cref="string"/> that contains the encoded string.
|
|
/// </returns>
|
|
/// <param name="s">
|
|
/// A <see cref="string"/> to encode.
|
|
/// </param>
|
|
public static string HtmlEncode (string s)
|
|
{
|
|
if (s == null || s.Length == 0)
|
|
return s;
|
|
|
|
var needEncode = false;
|
|
foreach (var c in s) {
|
|
if (c == '&' || c == '"' || c == '<' || c == '>' || c > 159) {
|
|
needEncode = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!needEncode)
|
|
return s;
|
|
|
|
var output = new StringBuilder ();
|
|
foreach (var c in s) {
|
|
if (c == '&')
|
|
output.Append ("&");
|
|
else if (c == '"')
|
|
output.Append (""");
|
|
else if (c == '<')
|
|
output.Append ("<");
|
|
else if (c == '>')
|
|
output.Append (">");
|
|
else {
|
|
// MS starts encoding with &# from 160 and stops at 255.
|
|
// We don't do that. One reason is the 65308/65310 unicode
|
|
// characters that look like '<' and '>'.
|
|
if (c > 159) {
|
|
output.Append ("&#");
|
|
output.Append (((int) c).ToString (CultureInfo.InvariantCulture));
|
|
output.Append (";");
|
|
}
|
|
else {
|
|
output.Append (c);
|
|
}
|
|
}
|
|
}
|
|
|
|
return output.ToString ();
|
|
}
|
|
|
|
/// <summary>
|
|
/// HTML-encodes a <see cref="string"/> and sends the encoded <see cref="string"/>
|
|
/// to a <see cref="TextWriter"/>.
|
|
/// </summary>
|
|
/// <param name="s">
|
|
/// A <see cref="string"/> to encode.
|
|
/// </param>
|
|
/// <param name="output">
|
|
/// A <see cref="TextWriter"/> that receives the encoded <see cref="string"/>.
|
|
/// </param>
|
|
public static void HtmlEncode (string s, TextWriter output)
|
|
{
|
|
if (output == null)
|
|
throw new ArgumentNullException ("output");
|
|
|
|
output.Write (HtmlEncode (s));
|
|
}
|
|
|
|
public static NameValueCollection ParseQueryString (string query)
|
|
{
|
|
return ParseQueryString (query, Encoding.UTF8);
|
|
}
|
|
|
|
public static NameValueCollection ParseQueryString (string query, Encoding encoding)
|
|
{
|
|
if (query == null)
|
|
throw new ArgumentNullException ("query");
|
|
|
|
var length = query.Length;
|
|
if (length == 0 || (length == 1 && query [0] == '?'))
|
|
return new NameValueCollection ();
|
|
|
|
if (query [0] == '?')
|
|
query = query.Substring (1);
|
|
|
|
if (encoding == null)
|
|
encoding = Encoding.UTF8;
|
|
|
|
var result = new HttpQSCollection ();
|
|
ParseQueryString (query, encoding, result);
|
|
|
|
return result;
|
|
}
|
|
|
|
public static string UrlDecode (string s)
|
|
{
|
|
return UrlDecode (s, Encoding.UTF8);
|
|
}
|
|
|
|
public static string UrlDecode (string s, Encoding encoding)
|
|
{
|
|
if (s == null || s.Length == 0 || !s.Contains ('%', '+'))
|
|
return s;
|
|
|
|
if (encoding == null)
|
|
encoding = Encoding.UTF8;
|
|
|
|
var length = s.Length;
|
|
var bytes = new List<byte> ();
|
|
char c;
|
|
int xchar;
|
|
for (int i = 0; i < length; i++) {
|
|
c = s [i];
|
|
if (c == '%' && i + 2 < length && s [i + 1] != '%') {
|
|
if (s [i + 1] == 'u' && i + 5 < length) {
|
|
// Unicode hex sequence.
|
|
xchar = GetChar (s, i + 2, 4);
|
|
if (xchar != -1) {
|
|
WriteCharBytes (bytes, (char) xchar, encoding);
|
|
i += 5;
|
|
}
|
|
else
|
|
WriteCharBytes (bytes, '%', encoding);
|
|
}
|
|
else if ((xchar = GetChar (s, i + 1, 2)) != -1) {
|
|
WriteCharBytes (bytes, (char) xchar, encoding);
|
|
i += 2;
|
|
}
|
|
else {
|
|
WriteCharBytes (bytes, '%', encoding);
|
|
}
|
|
|
|
continue;
|
|
}
|
|
|
|
if (c == '+')
|
|
WriteCharBytes (bytes, ' ', encoding);
|
|
else
|
|
WriteCharBytes (bytes, c, encoding);
|
|
}
|
|
|
|
var buffer = bytes.ToArray ();
|
|
return encoding.GetString (buffer);
|
|
}
|
|
|
|
public static string UrlDecode (byte [] bytes, Encoding encoding)
|
|
{
|
|
if (encoding == null)
|
|
encoding = Encoding.UTF8;
|
|
|
|
int length;
|
|
return bytes == null
|
|
? null
|
|
: (length = bytes.Length) == 0
|
|
? String.Empty
|
|
: UrlDecodeInternal (bytes, 0, length, encoding);
|
|
}
|
|
|
|
public static string UrlDecode (byte [] bytes, int offset, int count, Encoding encoding)
|
|
{
|
|
if (bytes == null)
|
|
return null;
|
|
|
|
var length = bytes.Length;
|
|
if (length == 0 || count == 0)
|
|
return String.Empty;
|
|
|
|
if (offset < 0 || offset >= length)
|
|
throw new ArgumentOutOfRangeException ("offset");
|
|
|
|
if (count < 0 || count > length - offset)
|
|
throw new ArgumentOutOfRangeException ("count");
|
|
|
|
if (encoding == null)
|
|
encoding = Encoding.UTF8;
|
|
|
|
return UrlDecodeInternal (bytes, offset, count, encoding);
|
|
}
|
|
|
|
public static byte [] UrlDecodeToBytes (byte [] bytes)
|
|
{
|
|
int length;
|
|
return bytes == null || (length = bytes.Length) == 0
|
|
? bytes
|
|
: UrlDecodeToBytesInternal (bytes, 0, length);
|
|
}
|
|
|
|
public static byte [] UrlDecodeToBytes (string s)
|
|
{
|
|
return UrlDecodeToBytes (s, Encoding.UTF8);
|
|
}
|
|
|
|
public static byte [] UrlDecodeToBytes (string s, Encoding encoding)
|
|
{
|
|
if (s == null)
|
|
return null;
|
|
|
|
if (s.Length == 0)
|
|
return new byte [0];
|
|
|
|
if (encoding == null)
|
|
encoding = Encoding.UTF8;
|
|
|
|
var bytes = encoding.GetBytes (s);
|
|
return UrlDecodeToBytesInternal (bytes, 0, bytes.Length);
|
|
}
|
|
|
|
public static byte [] UrlDecodeToBytes (byte [] bytes, int offset, int count)
|
|
{
|
|
int length;
|
|
if (bytes == null || (length = bytes.Length) == 0)
|
|
return bytes;
|
|
|
|
if (count == 0)
|
|
return new byte [0];
|
|
|
|
if (offset < 0 || offset >= length)
|
|
throw new ArgumentOutOfRangeException ("offset");
|
|
|
|
if (count < 0 || count > length - offset )
|
|
throw new ArgumentOutOfRangeException ("count");
|
|
|
|
return UrlDecodeToBytesInternal (bytes, offset, count);
|
|
}
|
|
|
|
public static string UrlEncode (byte [] bytes)
|
|
{
|
|
int length;
|
|
return bytes == null
|
|
? null
|
|
: (length = bytes.Length) == 0
|
|
? String.Empty
|
|
: Encoding.ASCII.GetString (UrlEncodeToBytesInternal (bytes, 0, length));
|
|
}
|
|
|
|
public static string UrlEncode (string s)
|
|
{
|
|
return UrlEncode (s, Encoding.UTF8);
|
|
}
|
|
|
|
public static string UrlEncode (string s, Encoding encoding)
|
|
{
|
|
int length;
|
|
if (s == null || (length = s.Length) == 0)
|
|
return s;
|
|
|
|
var needEncode = false;
|
|
foreach (var c in s) {
|
|
if ((c < '0') || (c < 'A' && c > '9') || (c > 'Z' && c < 'a') || (c > 'z')) {
|
|
if (NotEncoded (c))
|
|
continue;
|
|
|
|
needEncode = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!needEncode)
|
|
return s;
|
|
|
|
if (encoding == null)
|
|
encoding = Encoding.UTF8;
|
|
|
|
// Avoided GetByteCount call.
|
|
var bytes = new byte [encoding.GetMaxByteCount (length)];
|
|
var realLen = encoding.GetBytes (s, 0, length, bytes, 0);
|
|
|
|
return Encoding.ASCII.GetString (UrlEncodeToBytesInternal (bytes, 0, realLen));
|
|
}
|
|
|
|
public static string UrlEncode (byte [] bytes, int offset, int count)
|
|
{
|
|
var encoded = UrlEncodeToBytes (bytes, offset, count);
|
|
return encoded == null
|
|
? null
|
|
: encoded.Length == 0
|
|
? String.Empty
|
|
: Encoding.ASCII.GetString (encoded);
|
|
}
|
|
|
|
public static byte [] UrlEncodeToBytes (byte [] bytes)
|
|
{
|
|
int length;
|
|
return bytes == null || (length = bytes.Length) == 0
|
|
? bytes
|
|
: UrlEncodeToBytesInternal (bytes, 0, length);
|
|
}
|
|
|
|
public static byte [] UrlEncodeToBytes (string s)
|
|
{
|
|
return UrlEncodeToBytes (s, Encoding.UTF8);
|
|
}
|
|
|
|
public static byte [] UrlEncodeToBytes (string s, Encoding encoding)
|
|
{
|
|
if (s == null)
|
|
return null;
|
|
|
|
if (s.Length == 0)
|
|
return new byte [0];
|
|
|
|
if (encoding == null)
|
|
encoding = Encoding.UTF8;
|
|
|
|
var bytes = encoding.GetBytes (s);
|
|
return UrlEncodeToBytesInternal (bytes, 0, bytes.Length);
|
|
}
|
|
|
|
public static byte [] UrlEncodeToBytes (byte [] bytes, int offset, int count)
|
|
{
|
|
int length;
|
|
if (bytes == null || (length = bytes.Length) == 0)
|
|
return bytes;
|
|
|
|
if (count == 0)
|
|
return new byte [0];
|
|
|
|
if (offset < 0 || offset >= length)
|
|
throw new ArgumentOutOfRangeException ("offset");
|
|
|
|
if (count < 0 || count > length - offset)
|
|
throw new ArgumentOutOfRangeException ("count");
|
|
|
|
return UrlEncodeToBytesInternal (bytes, offset, count);
|
|
}
|
|
|
|
public static string UrlEncodeUnicode (string s)
|
|
{
|
|
return s == null || s.Length == 0
|
|
? s
|
|
: Encoding.ASCII.GetString (UrlEncodeUnicodeToBytesInternal (s));
|
|
}
|
|
|
|
public static byte [] UrlEncodeUnicodeToBytes (string s)
|
|
{
|
|
if (s == null)
|
|
return null;
|
|
|
|
if (s.Length == 0)
|
|
return new byte [0];
|
|
|
|
return UrlEncodeUnicodeToBytesInternal (s);
|
|
}
|
|
|
|
public static string UrlPathEncode (string s)
|
|
{
|
|
if (s == null || s.Length == 0)
|
|
return s;
|
|
|
|
var result = new MemoryStream ();
|
|
foreach (var c in s)
|
|
UrlPathEncodeChar (c, result);
|
|
|
|
return Encoding.ASCII.GetString (result.ToArray ());
|
|
}
|
|
|
|
#endregion
|
|
}
|
|
}
|