743 lines
20 KiB
C#
743 lines
20 KiB
C#
//
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// 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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// Marek Safar (marek.safar@gmail.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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// Copyright (C) 2011 Xamarin Inc (http://www.xamarin.com)
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//
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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.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 System.Net
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{
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[Serializable]
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[ComVisible(true)]
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public class WebHeaderCollection : NameValueCollection, ISerializable {
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[Flags]
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internal enum HeaderInfo
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{
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Request = 1,
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Response = 1 << 1,
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MultiValue = 1 << 10
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}
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static readonly bool[] allowed_chars = {
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false, false, false, false, false, false, false, false, false, false, false, false, false, false,
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false, false, false, false, false, false, false, false, false, false, false, false, false, false,
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false, false, false, false, false, true, false, true, true, true, true, false, false, false, true,
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true, false, true, true, false, true, true, true, true, true, true, true, true, true, true, false,
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false, false, false, false, false, false, true, true, true, true, true, true, true, true, true,
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true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true,
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false, false, false, true, true, true, true, true, true, true, true, true, true, true, true, true,
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true, true, true, true, true, true, true, true, true, true, true, true, true, true, true, true,
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false, true, false
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};
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static readonly Dictionary<string, HeaderInfo> headers;
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HeaderInfo? headerRestriction;
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HeaderInfo? headerConsistency;
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static WebHeaderCollection ()
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{
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headers = new Dictionary<string, HeaderInfo> (StringComparer.OrdinalIgnoreCase) {
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{ "Allow", HeaderInfo.MultiValue },
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{ "Accept", HeaderInfo.Request | HeaderInfo.MultiValue },
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{ "Accept-Charset", HeaderInfo.MultiValue },
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{ "Accept-Encoding", HeaderInfo.MultiValue },
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{ "Accept-Language", HeaderInfo.MultiValue },
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{ "Accept-Ranges", HeaderInfo.MultiValue },
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{ "Authorization", HeaderInfo.MultiValue },
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{ "Cache-Control", HeaderInfo.MultiValue },
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{ "Cookie", HeaderInfo.MultiValue },
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{ "Connection", HeaderInfo.Request | HeaderInfo.MultiValue },
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{ "Content-Encoding", HeaderInfo.MultiValue },
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{ "Content-Length", HeaderInfo.Request | HeaderInfo.Response },
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{ "Content-Type", HeaderInfo.Request },
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{ "Content-Language", HeaderInfo.MultiValue },
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{ "Date", HeaderInfo.Request },
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{ "Expect", HeaderInfo.Request | HeaderInfo.MultiValue},
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{ "Host", HeaderInfo.Request },
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{ "If-Match", HeaderInfo.MultiValue },
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{ "If-Modified-Since", HeaderInfo.Request },
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{ "If-None-Match", HeaderInfo.MultiValue },
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{ "Keep-Alive", HeaderInfo.Response },
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{ "Pragma", HeaderInfo.MultiValue },
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{ "Proxy-Authenticate", HeaderInfo.MultiValue },
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{ "Proxy-Authorization", HeaderInfo.MultiValue },
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{ "Proxy-Connection", HeaderInfo.Request | HeaderInfo.MultiValue },
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{ "Range", HeaderInfo.Request | HeaderInfo.MultiValue },
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{ "Referer", HeaderInfo.Request },
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{ "Set-Cookie", HeaderInfo.MultiValue },
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{ "Set-Cookie2", HeaderInfo.MultiValue },
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{ "TE", HeaderInfo.MultiValue },
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{ "Trailer", HeaderInfo.MultiValue },
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{ "Transfer-Encoding", HeaderInfo.Request | HeaderInfo.Response | HeaderInfo.MultiValue },
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{ "Upgrade", HeaderInfo.MultiValue },
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{ "User-Agent", HeaderInfo.Request },
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{ "Vary", HeaderInfo.MultiValue },
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{ "Via", HeaderInfo.MultiValue },
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{ "Warning", HeaderInfo.MultiValue },
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{ "WWW-Authenticate", HeaderInfo.Response | HeaderInfo. MultiValue }
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};
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}
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// Constructors
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public WebHeaderCollection ()
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{
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}
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internal WebHeaderCollection(WebHeaderCollectionType type)
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{
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// m_Type = type;
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// if (type == WebHeaderCollectionType.HttpWebResponse)
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// m_CommonHeaders = new string[s_CommonHeaderNames.Length - 1]; // Minus one for the sentinel.
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}
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protected WebHeaderCollection (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 (HeaderInfo headerRestriction)
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{
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this.headerRestriction = headerRestriction;
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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), 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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CheckRestrictedHeader (name);
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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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AddValue (headerName, headerValue);
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}
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internal void AddValue (string headerName, string headerValue)
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{
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base.Add (headerName, headerValue);
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}
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internal string [] GetValues_internal (string header, bool split)
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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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if (split && IsMultiValue (header)) {
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List<string> separated = null;
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foreach (var value in values) {
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if (value.IndexOf (',') < 0)
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continue;
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if (separated == null) {
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separated = new List<string> (values.Length + 1);
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foreach (var v in values) {
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if (v == value)
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break;
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separated.Add (v);
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}
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}
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var slices = value.Split (',');
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var slices_length = slices.Length;
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if (value[value.Length - 1] == ',')
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--slices_length;
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for (int i = 0; i < slices_length; ++i ) {
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separated.Add (slices[i].Trim ());
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}
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}
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if (separated != null)
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return separated.ToArray ();
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}
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return values;
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}
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public override string [] GetValues (string header)
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{
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return GetValues_internal (header, true);
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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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public static bool IsRestricted (string headerName)
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{
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return IsRestricted (headerName, false);
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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 (headerName == null)
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throw new ArgumentNullException ("headerName");
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if (headerName.Length == 0)
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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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HeaderInfo info;
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if (!headers.TryGetValue (headerName, out info))
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return false;
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var flag = response ? HeaderInfo.Response : HeaderInfo.Request;
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return (info & flag) != 0;
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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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CheckRestrictedHeader (name);
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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 (!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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CheckRestrictedHeader (name);
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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 (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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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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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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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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public string this [HttpRequestHeader header] {
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get {
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return Get (RequestHeaderToString (header));
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}
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set {
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Set (header, value);
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}
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}
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public string this [HttpResponseHeader header] {
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get {
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return Get (ResponseHeaderToString (header));
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}
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set {
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Set (header, 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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}
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// Internal Methods
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// 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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{
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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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SetInternal (header.Substring (0, pos), header.Substring (pos + 1));
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}
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internal void SetInternal (string name, string value)
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{
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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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if (IsMultiValue (name)) {
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base.Add (name, value);
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} else {
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base.Remove (name);
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base.Set (name, value);
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}
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}
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internal void RemoveAndAdd (string name, string value)
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{
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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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base.Remove (name);
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base.Set (name, value);
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}
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internal void RemoveInternal (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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base.Remove (name);
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}
|
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// Private Methods
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string RequestHeaderToString (HttpRequestHeader value)
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{
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CheckHeaderConsistency (HeaderInfo.Request);
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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";
|
|
case HttpRequestHeader.IfRange:
|
|
return "If-Range";
|
|
case HttpRequestHeader.IfUnmodifiedSince:
|
|
return "If-Unmodified-Since";
|
|
case HttpRequestHeader.MaxForwards:
|
|
return "Max-Forwards";
|
|
case HttpRequestHeader.ProxyAuthorization:
|
|
return "Proxy-Authorization";
|
|
case HttpRequestHeader.Referer:
|
|
return "Referer";
|
|
case HttpRequestHeader.Range:
|
|
return "Range";
|
|
case HttpRequestHeader.Te:
|
|
return "TE";
|
|
case HttpRequestHeader.Translate:
|
|
return "Translate";
|
|
case HttpRequestHeader.UserAgent:
|
|
return "User-Agent";
|
|
default:
|
|
throw new InvalidOperationException ();
|
|
}
|
|
}
|
|
|
|
string ResponseHeaderToString (HttpResponseHeader value)
|
|
{
|
|
CheckHeaderConsistency (HeaderInfo.Response);
|
|
|
|
switch (value) {
|
|
case HttpResponseHeader.CacheControl:
|
|
return "Cache-Control";
|
|
case HttpResponseHeader.Connection:
|
|
return "Connection";
|
|
case HttpResponseHeader.Date:
|
|
return "Date";
|
|
case HttpResponseHeader.KeepAlive:
|
|
return "Keep-Alive";
|
|
case HttpResponseHeader.Pragma:
|
|
return "Pragma";
|
|
case HttpResponseHeader.Trailer:
|
|
return "Trailer";
|
|
case HttpResponseHeader.TransferEncoding:
|
|
return "Transfer-Encoding";
|
|
case HttpResponseHeader.Upgrade:
|
|
return "Upgrade";
|
|
case HttpResponseHeader.Via:
|
|
return "Via";
|
|
case HttpResponseHeader.Warning:
|
|
return "Warning";
|
|
case HttpResponseHeader.Allow:
|
|
return "Allow";
|
|
case HttpResponseHeader.ContentLength:
|
|
return "Content-Length";
|
|
case HttpResponseHeader.ContentType:
|
|
return "Content-Type";
|
|
case HttpResponseHeader.ContentEncoding:
|
|
return "Content-Encoding";
|
|
case HttpResponseHeader.ContentLanguage:
|
|
return "Content-Language";
|
|
case HttpResponseHeader.ContentLocation:
|
|
return "Content-Location";
|
|
case HttpResponseHeader.ContentMd5:
|
|
return "Content-MD5";
|
|
case HttpResponseHeader.ContentRange:
|
|
return "Content-Range";
|
|
case HttpResponseHeader.Expires:
|
|
return "Expires";
|
|
case HttpResponseHeader.LastModified:
|
|
return "Last-Modified";
|
|
case HttpResponseHeader.AcceptRanges:
|
|
return "Accept-Ranges";
|
|
case HttpResponseHeader.Age:
|
|
return "Age";
|
|
case HttpResponseHeader.ETag:
|
|
return "ETag";
|
|
case HttpResponseHeader.Location:
|
|
return "Location";
|
|
case HttpResponseHeader.ProxyAuthenticate:
|
|
return "Proxy-Authenticate";
|
|
case HttpResponseHeader.RetryAfter:
|
|
return "Retry-After";
|
|
case HttpResponseHeader.Server:
|
|
return "Server";
|
|
case HttpResponseHeader.SetCookie:
|
|
return "Set-Cookie";
|
|
case HttpResponseHeader.Vary:
|
|
return "Vary";
|
|
case HttpResponseHeader.WwwAuthenticate:
|
|
return "WWW-Authenticate";
|
|
default:
|
|
throw new InvalidOperationException ();
|
|
}
|
|
}
|
|
|
|
void CheckRestrictedHeader (string headerName)
|
|
{
|
|
if (!headerRestriction.HasValue)
|
|
return;
|
|
|
|
HeaderInfo info;
|
|
if (!headers.TryGetValue (headerName, out info))
|
|
return;
|
|
|
|
if ((info & headerRestriction.Value) != 0)
|
|
throw new ArgumentException ("This header must be modified with the appropiate property.");
|
|
}
|
|
|
|
void CheckHeaderConsistency (HeaderInfo value)
|
|
{
|
|
if (!headerConsistency.HasValue) {
|
|
headerConsistency = value;
|
|
return;
|
|
}
|
|
|
|
if ((headerConsistency & value) == 0)
|
|
throw new InvalidOperationException ();
|
|
}
|
|
|
|
internal static bool IsMultiValue (string headerName)
|
|
{
|
|
if (headerName == null)
|
|
return false;
|
|
|
|
HeaderInfo info;
|
|
return headers.TryGetValue (headerName, out info) && (info & HeaderInfo.MultiValue) != 0;
|
|
}
|
|
|
|
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 [c])
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
}
|
|
}
|