//
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// WebHeaderCollection.cs
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// Copied from System.Net.WebHeaderCollection
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//
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// Authors:
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// Lawrence Pit (loz@cable.a2000.nl)
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// Gonzalo Paniagua Javier (gonzalo@ximian.com)
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// Miguel de Icaza (miguel@novell.com)
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//
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// Copyright 2003 Ximian, Inc. (http://www.ximian.com)
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// Copyright 2007 Novell, Inc. (http://www.novell.com)
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System;
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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.Net;
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using System.Runtime.InteropServices;
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using System.Runtime.Serialization;
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using System.Text;
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// See RFC 2068 par 4.2 Message Headers
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namespace WebSocketSharp.Net {
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[Serializable]
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[ComVisible(true)]
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public class WebHeaderCollection : NameValueCollection, ISerializable
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{
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private static readonly Dictionary<string, bool> multiValue;
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private static readonly Dictionary<string, bool> restricted;
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private static readonly Dictionary<string, bool> restricted_response;
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private bool internallyCreated = false;
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// Static Initializer
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static WebHeaderCollection ()
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{
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// the list of restricted header names as defined
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// by the ms.net spec
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restricted = new Dictionary<string, bool> (StringComparer.InvariantCultureIgnoreCase);
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restricted.Add ("accept", true);
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restricted.Add ("connection", true);
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restricted.Add ("content-length", true);
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restricted.Add ("content-type", true);
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restricted.Add ("date", true);
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restricted.Add ("expect", true);
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restricted.Add ("host", true);
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restricted.Add ("if-modified-since", true);
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restricted.Add ("range", true);
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restricted.Add ("referer", true);
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restricted.Add ("transfer-encoding", true);
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restricted.Add ("user-agent", true);
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restricted.Add ("proxy-connection", true);
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//
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restricted_response = new Dictionary<string, bool> (StringComparer.InvariantCultureIgnoreCase);
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restricted_response.Add ("Content-Length", true);
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restricted_response.Add ("Transfer-Encoding", true);
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restricted_response.Add ("WWW-Authenticate", true);
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// see par 14 of RFC 2068 to see which header names
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// accept multiple values each separated by a comma
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multiValue = new Dictionary<string, bool> (StringComparer.InvariantCultureIgnoreCase);
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multiValue.Add ("accept", true);
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multiValue.Add ("accept-charset", true);
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multiValue.Add ("accept-encoding", true);
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multiValue.Add ("accept-language", true);
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multiValue.Add ("accept-ranges", true);
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multiValue.Add ("allow", true);
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multiValue.Add ("authorization", true);
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multiValue.Add ("cache-control", true);
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multiValue.Add ("connection", true);
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multiValue.Add ("content-encoding", true);
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multiValue.Add ("content-language", true);
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multiValue.Add ("expect", true);
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multiValue.Add ("if-match", true);
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multiValue.Add ("if-none-match", true);
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multiValue.Add ("proxy-authenticate", true);
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multiValue.Add ("public", true);
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multiValue.Add ("range", true);
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multiValue.Add ("transfer-encoding", true);
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multiValue.Add ("upgrade", true);
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multiValue.Add ("vary", true);
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multiValue.Add ("via", true);
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multiValue.Add ("warning", true);
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multiValue.Add ("www-authenticate", true);
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// Extra
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multiValue.Add ("set-cookie", true);
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multiValue.Add ("set-cookie2", true);
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}
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// Constructors
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public WebHeaderCollection () { }
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protected WebHeaderCollection (
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SerializationInfo serializationInfo,
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StreamingContext streamingContext)
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{
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int count;
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try {
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count = serializationInfo.GetInt32("Count");
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for (int i = 0; i < count; i++)
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this.Add (serializationInfo.GetString (i.ToString ()),
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serializationInfo.GetString ((count + i).ToString ()));
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} catch (SerializationException){
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count = serializationInfo.GetInt32("count");
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for (int i = 0; i < count; i++)
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this.Add (serializationInfo.GetString ("k" + i),
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serializationInfo.GetString ("v" + i));
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}
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}
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internal WebHeaderCollection (bool internallyCreated)
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{
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this.internallyCreated = internallyCreated;
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}
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// Methods
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public void Add (string header)
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{
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if (header == null)
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throw new ArgumentNullException ("header");
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int pos = header.IndexOf (':');
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if (pos == -1)
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throw new ArgumentException ("no colon found", "header");
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this.Add (header.Substring (0, pos),
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header.Substring (pos + 1));
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}
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public override void Add (string name, string value)
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{
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if (name == null)
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throw new ArgumentNullException ("name");
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if (internallyCreated && IsRestricted (name))
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throw new ArgumentException ("This header must be modified with the appropiate property.");
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this.AddWithoutValidate (name, value);
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}
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protected void AddWithoutValidate (string headerName, string headerValue)
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{
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if (!IsHeaderName (headerName))
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throw new ArgumentException ("invalid header name: " + headerName, "headerName");
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if (headerValue == null)
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headerValue = String.Empty;
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else
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headerValue = headerValue.Trim ();
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if (!IsHeaderValue (headerValue))
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throw new ArgumentException ("invalid header value: " + headerValue, "headerValue");
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base.Add (headerName, headerValue);
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}
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public override string [] GetValues (string header)
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{
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if (header == null)
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throw new ArgumentNullException ("header");
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string [] values = base.GetValues (header);
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if (values == null || values.Length == 0)
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return null;
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/*
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if (IsMultiValue (header)) {
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values = GetMultipleValues (values);
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}
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*/
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return values;
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}
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public override string[] GetValues (int index)
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{
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string[] values = base.GetValues (index);
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if (values == null || values.Length == 0) {
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return(null);
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}
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return(values);
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}
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/* Now i wonder why this is here...
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static string [] GetMultipleValues (string [] values)
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{
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ArrayList mvalues = new ArrayList (values.Length);
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StringBuilder sb = null;
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for (int i = 0; i < values.Length; ++i) {
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string val = values [i];
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if (val.IndexOf (',') == -1) {
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mvalues.Add (val);
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continue;
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}
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if (sb == null)
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sb = new StringBuilder ();
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bool quote = false;
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for (int k = 0; k < val.Length; k++) {
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char c = val [k];
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if (c == '"') {
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quote = !quote;
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} else if (!quote && c == ',') {
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mvalues.Add (sb.ToString ().Trim ());
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sb.Length = 0;
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continue;
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}
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sb.Append (c);
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}
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if (sb.Length > 0) {
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mvalues.Add (sb.ToString ().Trim ());
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sb.Length = 0;
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}
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}
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return (string []) mvalues.ToArray (typeof (string));
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}
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*/
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public static bool IsRestricted (string headerName)
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{
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if (headerName == null)
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throw new ArgumentNullException ("headerName");
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if (headerName == "") // MS throw nullexception here!
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throw new ArgumentException ("empty string", "headerName");
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if (!IsHeaderName (headerName))
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throw new ArgumentException ("Invalid character in header");
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return restricted.ContainsKey (headerName);
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}
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public static bool IsRestricted (string headerName, bool response)
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{
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if (String.IsNullOrEmpty (headerName))
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throw new ArgumentNullException ("headerName");
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if (!IsHeaderName (headerName))
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throw new ArgumentException ("Invalid character in header");
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if (response)
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return restricted_response.ContainsKey (headerName);
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return restricted.ContainsKey (headerName);
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}
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public override void OnDeserialization (object sender)
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{
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}
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public override void Remove (string name)
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{
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if (name == null)
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throw new ArgumentNullException ("name");
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if (internallyCreated && IsRestricted (name))
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throw new ArgumentException ("restricted header");
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base.Remove (name);
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}
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public override void Set (string name, string value)
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{
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if (name == null)
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throw new ArgumentNullException ("name");
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if (internallyCreated && IsRestricted (name))
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throw new ArgumentException ("restricted header");
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if (!IsHeaderName (name))
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throw new ArgumentException ("invalid header name");
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if (value == null)
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value = String.Empty;
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else
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value = value.Trim ();
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if (!IsHeaderValue (value))
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throw new ArgumentException ("invalid header value");
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base.Set (name, value);
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}
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public byte[] ToByteArray ()
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{
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return Encoding.UTF8.GetBytes(ToString ());
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}
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internal string ToStringMultiValue ()
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{
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StringBuilder sb = new StringBuilder();
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int count = base.Count;
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for (int i = 0; i < count ; i++) {
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string key = GetKey (i);
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if (IsMultiValue (key)) {
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foreach (string v in GetValues (i)) {
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sb.Append (key)
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.Append (": ")
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.Append (v)
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.Append ("\r\n");
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}
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} else {
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sb.Append (key)
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.Append (": ")
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.Append (Get (i))
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.Append ("\r\n");
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}
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}
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return sb.Append("\r\n").ToString();
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}
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public override string ToString ()
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{
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StringBuilder sb = new StringBuilder();
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int count = base.Count;
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for (int i = 0; i < count ; i++)
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sb.Append (GetKey (i))
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.Append (": ")
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.Append (Get (i))
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.Append ("\r\n");
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return sb.Append("\r\n").ToString();
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}
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void ISerializable.GetObjectData (
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SerializationInfo serializationInfo,
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StreamingContext streamingContext)
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{
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GetObjectData (serializationInfo, streamingContext);
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}
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public override void GetObjectData (SerializationInfo serializationInfo, StreamingContext streamingContext)
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{
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int count = base.Count;
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serializationInfo.AddValue ("Count", count);
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for (int i = 0; i < count; i++) {
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serializationInfo.AddValue (i.ToString (), GetKey (i));
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serializationInfo.AddValue ((count + i).ToString (), Get (i));
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}
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}
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public override string[] AllKeys
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{
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get {
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return(base.AllKeys);
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}
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}
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public override int Count
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{
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get {
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return(base.Count);
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}
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}
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public override KeysCollection Keys
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{
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get {
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return(base.Keys);
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}
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}
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public override string Get (int index)
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{
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return(base.Get (index));
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}
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public override string Get (string name)
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{
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return(base.Get (name));
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}
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public override string GetKey (int index)
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{
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return(base.GetKey (index));
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}
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public void Add (HttpRequestHeader header, string value)
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{
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Add (RequestHeaderToString (header), value);
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}
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public void Remove (HttpRequestHeader header)
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{
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Remove (RequestHeaderToString (header));
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}
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public void Set (HttpRequestHeader header, string value)
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{
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Set (RequestHeaderToString (header), value);
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}
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public void Add (HttpResponseHeader header, string value)
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{
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Add (ResponseHeaderToString (header), value);
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}
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public void Remove (HttpResponseHeader header)
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{
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Remove (ResponseHeaderToString (header));
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}
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public void Set (HttpResponseHeader header, string value)
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{
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Set (ResponseHeaderToString (header), value);
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}
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string RequestHeaderToString (HttpRequestHeader value)
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{
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switch (value){
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case HttpRequestHeader.CacheControl:
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return "Cache-Control";
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case HttpRequestHeader.Connection:
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return "Connection";
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case HttpRequestHeader.Date:
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return "Date";
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case HttpRequestHeader.KeepAlive:
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return "Keep-Alive";
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case HttpRequestHeader.Pragma:
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return "Pragma";
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case HttpRequestHeader.Trailer:
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return "Trailer";
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case HttpRequestHeader.TransferEncoding:
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return "Transfer-Encoding";
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case HttpRequestHeader.Upgrade:
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return "Upgrade";
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case HttpRequestHeader.Via:
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return "Via";
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case HttpRequestHeader.Warning:
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return "Warning";
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case HttpRequestHeader.Allow:
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return "Allow";
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case HttpRequestHeader.ContentLength:
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return "Content-Length";
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case HttpRequestHeader.ContentType:
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return "Content-Type";
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case HttpRequestHeader.ContentEncoding:
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return "Content-Encoding";
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case HttpRequestHeader.ContentLanguage:
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return "Content-Language";
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case HttpRequestHeader.ContentLocation:
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return "Content-Location";
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case HttpRequestHeader.ContentMd5:
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return "Content-MD5";
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case HttpRequestHeader.ContentRange:
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return "Content-Range";
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case HttpRequestHeader.Expires:
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return "Expires";
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case HttpRequestHeader.LastModified:
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return "Last-Modified";
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case HttpRequestHeader.Accept:
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return "Accept";
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case HttpRequestHeader.AcceptCharset:
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return "Accept-Charset";
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case HttpRequestHeader.AcceptEncoding:
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return "Accept-Encoding";
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case HttpRequestHeader.AcceptLanguage:
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return "accept-language";
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case HttpRequestHeader.Authorization:
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return "Authorization";
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case HttpRequestHeader.Cookie:
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return "Cookie";
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case HttpRequestHeader.Expect:
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return "Expect";
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case HttpRequestHeader.From:
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return "From";
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case HttpRequestHeader.Host:
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return "Host";
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case HttpRequestHeader.IfMatch:
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return "If-Match";
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case HttpRequestHeader.IfModifiedSince:
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return "If-Modified-Since";
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case HttpRequestHeader.IfNoneMatch:
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return "If-None-Match";
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case HttpRequestHeader.IfRange:
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return "If-Range";
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case HttpRequestHeader.IfUnmodifiedSince:
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return "If-Unmodified-Since";
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case HttpRequestHeader.MaxForwards:
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return "Max-Forwards";
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case HttpRequestHeader.ProxyAuthorization:
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return "Proxy-Authorization";
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case HttpRequestHeader.Referer:
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return "Referer";
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case HttpRequestHeader.Range:
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return "Range";
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case HttpRequestHeader.Te:
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return "TE";
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case HttpRequestHeader.Translate:
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return "Translate";
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case HttpRequestHeader.UserAgent:
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return "User-Agent";
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default:
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throw new InvalidOperationException ();
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}
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}
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public string this[HttpRequestHeader hrh]
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{
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get {
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return Get (RequestHeaderToString (hrh));
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}
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set {
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Add (RequestHeaderToString (hrh), value);
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}
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}
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string ResponseHeaderToString (HttpResponseHeader value)
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{
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switch (value){
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case HttpResponseHeader.CacheControl:
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return "Cache-Control";
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case HttpResponseHeader.Connection:
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return "Connection";
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case HttpResponseHeader.Date:
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return "Date";
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case HttpResponseHeader.KeepAlive:
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return "Keep-Alive";
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case HttpResponseHeader.Pragma:
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return "Pragma";
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case HttpResponseHeader.Trailer:
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return "Trailer";
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case HttpResponseHeader.TransferEncoding:
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return "Transfer-Encoding";
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case HttpResponseHeader.Upgrade:
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return "Upgrade";
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case HttpResponseHeader.Via:
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return "Via";
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case HttpResponseHeader.Warning:
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return "Warning";
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case HttpResponseHeader.Allow:
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return "Allow";
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case HttpResponseHeader.ContentLength:
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return "Content-Length";
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case HttpResponseHeader.ContentType:
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return "Content-Type";
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case HttpResponseHeader.ContentEncoding:
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return "Content-Encoding";
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case HttpResponseHeader.ContentLanguage:
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return "Content-Language";
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case HttpResponseHeader.ContentLocation:
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return "Content-Location";
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case HttpResponseHeader.ContentMd5:
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return "Content-MD5";
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case HttpResponseHeader.ContentRange:
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return "Content-Range";
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case HttpResponseHeader.Expires:
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return "Expires";
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case HttpResponseHeader.LastModified:
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return "Last-Modified";
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case HttpResponseHeader.AcceptRanges:
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return "Accept-Ranges";
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case HttpResponseHeader.Age:
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return "Age";
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case HttpResponseHeader.ETag:
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return "ETag";
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case HttpResponseHeader.Location:
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return "Location";
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case HttpResponseHeader.ProxyAuthenticate:
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return "Proxy-Authenticate";
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case HttpResponseHeader.RetryAfter:
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return "Retry-After";
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case HttpResponseHeader.Server:
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return "Server";
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case HttpResponseHeader.SetCookie:
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return "Set-Cookie";
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case HttpResponseHeader.Vary:
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return "Vary";
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case HttpResponseHeader.WwwAuthenticate:
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return "WWW-Authenticate";
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default:
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throw new InvalidOperationException ();
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}
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}
|
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public string this[HttpResponseHeader hrh]
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{
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get
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{
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return Get (ResponseHeaderToString (hrh));
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}
|
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set
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{
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Add (ResponseHeaderToString (hrh), value);
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}
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}
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public override void Clear ()
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{
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base.Clear ();
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}
|
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public override IEnumerator GetEnumerator ()
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{
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return(base.GetEnumerator ());
|
}
|
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// Internal Methods
|
|
// With this we don't check for invalid characters in header. See bug #55994.
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internal void SetInternal (string header)
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{
|
int pos = header.IndexOf (':');
|
if (pos == -1)
|
throw new ArgumentException ("no colon found", "header");
|
|
SetInternal (header.Substring (0, pos), header.Substring (pos + 1));
|
}
|
|
internal void SetInternal (string name, string value)
|
{
|
if (value == null)
|
value = String.Empty;
|
else
|
value = value.Trim ();
|
if (!IsHeaderValue (value))
|
throw new ArgumentException ("invalid header value");
|
|
if (IsMultiValue (name)) {
|
base.Add (name, value);
|
} else {
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base.Remove (name);
|
base.Set (name, value);
|
}
|
}
|
|
internal void RemoveAndAdd (string name, string value)
|
{
|
if (value == null)
|
value = String.Empty;
|
else
|
value = value.Trim ();
|
|
base.Remove (name);
|
base.Set (name, value);
|
}
|
|
internal void RemoveInternal (string name)
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{
|
if (name == null)
|
throw new ArgumentNullException ("name");
|
base.Remove (name);
|
}
|
|
// Private Methods
|
|
internal static bool IsMultiValue (string headerName)
|
{
|
if (headerName == null || headerName == "")
|
return false;
|
|
return multiValue.ContainsKey (headerName);
|
}
|
|
internal static bool IsHeaderValue (string value)
|
{
|
// TEXT any 8 bit value except CTL's (0-31 and 127)
|
// but including \r\n space and \t
|
// after a newline at least one space or \t must follow
|
// certain header fields allow comments ()
|
|
int len = value.Length;
|
for (int i = 0; i < len; i++) {
|
char c = value [i];
|
if (c == 127)
|
return false;
|
if (c < 0x20 && (c != '\r' && c != '\n' && c != '\t'))
|
return false;
|
if (c == '\n' && ++i < len) {
|
c = value [i];
|
if (c != ' ' && c != '\t')
|
return false;
|
}
|
}
|
|
return true;
|
}
|
|
internal static bool IsHeaderName (string name)
|
{
|
if (name == null || name.Length == 0)
|
return false;
|
|
int len = name.Length;
|
for (int i = 0; i < len; i++) {
|
char c = name [i];
|
if (c > 126 || !allowed_chars [(int) c])
|
return false;
|
}
|
|
return true;
|
}
|
|
static bool [] allowed_chars = new bool [126] {
|
false, false, false, false, false, false, false, false, false, false, false, false, false, false,
|
false, false, false, false, false, false, false, false, false, false, false, false, false, false,
|
false, false, false, false, false, true, false, true, true, true, true, false, false, false, true,
|
true, false, true, true, false, true, true, true, true, true, true, true, true, true, true, false,
|
false, false, false, false, false, false, true, true, true, true, true, true, true, true, true,
|
true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true,
|
false, false, false, true, true, true, true, true, true, true, true, true, true, true, true, true,
|
true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true,
|
false, true, false
|
};
|
}
|
}
|
