392 lines
13 KiB
C#
392 lines
13 KiB
C#
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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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using MediaBrowser.Model.Services;
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namespace SocketHttpListener.Net
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{
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[ComVisible(true)]
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public class WebHeaderCollection : QueryParamCollection
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{
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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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{ "Age", HeaderInfo.Response },
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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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{ "Server", HeaderInfo.Response },
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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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{ "Translate", HeaderInfo.Request | HeaderInfo.Response },
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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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{ "SecWebSocketAccept", HeaderInfo.Response },
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{ "SecWebSocketExtensions", HeaderInfo.Request | HeaderInfo.Response | HeaderInfo. MultiValue },
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{ "SecWebSocketKey", HeaderInfo.Request },
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{ "Sec-WebSocket-Protocol", HeaderInfo.Request | HeaderInfo.Response | HeaderInfo. MultiValue },
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{ "SecWebSocketVersion", HeaderInfo.Response | HeaderInfo. MultiValue }
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};
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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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ThrowIfRestricted(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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{
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List<string> separated = null;
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foreach (var value in values)
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{
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if (value.IndexOf(',') < 0)
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{
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if (separated != null)
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separated.Add(value);
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continue;
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}
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if (separated == null)
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{
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separated = new List<string>(values.Length + 1);
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foreach (var v in values)
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{
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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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{
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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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{
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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 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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ThrowIfRestricted(name);
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base.Set(name, value);
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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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{
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string key = GetKey(i);
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if (IsMultiValue(key))
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{
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foreach (string v in GetValues(i))
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{
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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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}
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else
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{
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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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// 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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{
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base.Add(name, value);
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}
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else
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{
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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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// Private Methods
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public override int Remove(string name)
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{
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ThrowIfRestricted(name);
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return base.Remove(name);
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}
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protected void ThrowIfRestricted(string headerName)
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{
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if (!headerRestriction.HasValue)
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return;
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HeaderInfo info;
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if (!headers.TryGetValue(headerName, out info))
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return;
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if ((info & headerRestriction.Value) != 0)
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throw new ArgumentException("This header must be modified with the appropriate property.");
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}
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internal static bool IsMultiValue(string headerName)
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{
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if (headerName == null)
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return false;
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HeaderInfo info;
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return headers.TryGetValue(headerName, out info) && (info & HeaderInfo.MultiValue) != 0;
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}
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internal static bool IsHeaderValue(string value)
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{
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// TEXT any 8 bit value except CTL's (0-31 and 127)
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// but including \r\n space and \t
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// after a newline at least one space or \t must follow
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// certain header fields allow comments ()
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int len = value.Length;
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for (int i = 0; i < len; i++)
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{
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char c = value[i];
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if (c == 127)
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return false;
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if (c < 0x20 && (c != '\r' && c != '\n' && c != '\t'))
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return false;
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if (c == '\n' && ++i < len)
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{
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c = value[i];
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if (c != ' ' && c != '\t')
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return false;
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}
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}
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return true;
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}
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internal static bool IsHeaderName(string name)
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{
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if (name == null || name.Length == 0)
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return false;
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int len = name.Length;
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for (int i = 0; i < len; i++)
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{
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char c = name[i];
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if (c > 126 || !allowed_chars[c])
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return false;
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}
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return true;
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}
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}
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}
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