jellyfin-server/SocketHttpListener/Net/WebHeaderCollection.cs

392 lines
13 KiB
C#
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2016-11-11 19:55:12 +00:00
using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Net;
using System.Runtime.InteropServices;
using System.Runtime.Serialization;
using System.Text;
using MediaBrowser.Model.Services;
namespace SocketHttpListener.Net
{
[ComVisible(true)]
public class WebHeaderCollection : QueryParamCollection
{
[Flags]
internal enum HeaderInfo
{
Request = 1,
Response = 1 << 1,
MultiValue = 1 << 10
}
static readonly bool[] allowed_chars = {
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
};
static readonly Dictionary<string, HeaderInfo> headers;
HeaderInfo? headerRestriction;
HeaderInfo? headerConsistency;
static WebHeaderCollection()
{
headers = new Dictionary<string, HeaderInfo>(StringComparer.OrdinalIgnoreCase) {
{ "Allow", HeaderInfo.MultiValue },
{ "Accept", HeaderInfo.Request | HeaderInfo.MultiValue },
{ "Accept-Charset", HeaderInfo.MultiValue },
{ "Accept-Encoding", HeaderInfo.MultiValue },
{ "Accept-Language", HeaderInfo.MultiValue },
{ "Accept-Ranges", HeaderInfo.MultiValue },
{ "Age", HeaderInfo.Response },
{ "Authorization", HeaderInfo.MultiValue },
{ "Cache-Control", HeaderInfo.MultiValue },
{ "Cookie", HeaderInfo.MultiValue },
{ "Connection", HeaderInfo.Request | HeaderInfo.MultiValue },
{ "Content-Encoding", HeaderInfo.MultiValue },
{ "Content-Length", HeaderInfo.Request | HeaderInfo.Response },
{ "Content-Type", HeaderInfo.Request },
{ "Content-Language", HeaderInfo.MultiValue },
{ "Date", HeaderInfo.Request },
{ "Expect", HeaderInfo.Request | HeaderInfo.MultiValue},
{ "Host", HeaderInfo.Request },
{ "If-Match", HeaderInfo.MultiValue },
{ "If-Modified-Since", HeaderInfo.Request },
{ "If-None-Match", HeaderInfo.MultiValue },
{ "Keep-Alive", HeaderInfo.Response },
{ "Pragma", HeaderInfo.MultiValue },
{ "Proxy-Authenticate", HeaderInfo.MultiValue },
{ "Proxy-Authorization", HeaderInfo.MultiValue },
{ "Proxy-Connection", HeaderInfo.Request | HeaderInfo.MultiValue },
{ "Range", HeaderInfo.Request | HeaderInfo.MultiValue },
{ "Referer", HeaderInfo.Request },
{ "Set-Cookie", HeaderInfo.MultiValue },
{ "Set-Cookie2", HeaderInfo.MultiValue },
{ "Server", HeaderInfo.Response },
{ "TE", HeaderInfo.MultiValue },
{ "Trailer", HeaderInfo.MultiValue },
{ "Transfer-Encoding", HeaderInfo.Request | HeaderInfo.Response | HeaderInfo.MultiValue },
{ "Translate", HeaderInfo.Request | HeaderInfo.Response },
{ "Upgrade", HeaderInfo.MultiValue },
{ "User-Agent", HeaderInfo.Request },
{ "Vary", HeaderInfo.MultiValue },
{ "Via", HeaderInfo.MultiValue },
{ "Warning", HeaderInfo.MultiValue },
{ "WWW-Authenticate", HeaderInfo.Response | HeaderInfo. MultiValue },
{ "SecWebSocketAccept", HeaderInfo.Response },
{ "SecWebSocketExtensions", HeaderInfo.Request | HeaderInfo.Response | HeaderInfo. MultiValue },
{ "SecWebSocketKey", HeaderInfo.Request },
{ "Sec-WebSocket-Protocol", HeaderInfo.Request | HeaderInfo.Response | HeaderInfo. MultiValue },
{ "SecWebSocketVersion", HeaderInfo.Response | HeaderInfo. MultiValue }
};
}
// Methods
public void Add(string header)
{
if (header == null)
throw new ArgumentNullException("header");
int pos = header.IndexOf(':');
if (pos == -1)
throw new ArgumentException("no colon found", "header");
this.Add(header.Substring(0, pos), header.Substring(pos + 1));
}
public override void Add(string name, string value)
{
if (name == null)
throw new ArgumentNullException("name");
ThrowIfRestricted(name);
this.AddWithoutValidate(name, value);
}
protected void AddWithoutValidate(string headerName, string headerValue)
{
if (!IsHeaderName(headerName))
throw new ArgumentException("invalid header name: " + headerName, "headerName");
if (headerValue == null)
headerValue = String.Empty;
else
headerValue = headerValue.Trim();
if (!IsHeaderValue(headerValue))
throw new ArgumentException("invalid header value: " + headerValue, "headerValue");
AddValue(headerName, headerValue);
}
internal void AddValue(string headerName, string headerValue)
{
base.Add(headerName, headerValue);
}
internal string[] GetValues_internal(string header, bool split)
{
if (header == null)
throw new ArgumentNullException("header");
string[] values = base.GetValues(header);
if (values == null || values.Length == 0)
return null;
if (split && IsMultiValue(header))
{
List<string> separated = null;
foreach (var value in values)
{
if (value.IndexOf(',') < 0)
{
if (separated != null)
separated.Add(value);
continue;
}
if (separated == null)
{
separated = new List<string>(values.Length + 1);
foreach (var v in values)
{
if (v == value)
break;
separated.Add(v);
}
}
var slices = value.Split(',');
var slices_length = slices.Length;
if (value[value.Length - 1] == ',')
--slices_length;
for (int i = 0; i < slices_length; ++i)
{
separated.Add(slices[i].Trim());
}
}
if (separated != null)
return separated.ToArray();
}
return values;
}
public override string[] GetValues(string header)
{
return GetValues_internal(header, true);
}
public override string[] GetValues(int index)
{
string[] values = base.GetValues(index);
if (values == null || values.Length == 0)
{
return null;
}
return values;
}
public static bool IsRestricted(string headerName)
{
return IsRestricted(headerName, false);
}
public static bool IsRestricted(string headerName, bool response)
{
if (headerName == null)
throw new ArgumentNullException("headerName");
if (headerName.Length == 0)
throw new ArgumentException("empty string", "headerName");
if (!IsHeaderName(headerName))
throw new ArgumentException("Invalid character in header");
HeaderInfo info;
if (!headers.TryGetValue(headerName, out info))
return false;
var flag = response ? HeaderInfo.Response : HeaderInfo.Request;
return (info & flag) != 0;
}
public override void Set(string name, string value)
{
if (name == null)
throw new ArgumentNullException("name");
if (!IsHeaderName(name))
throw new ArgumentException("invalid header name");
if (value == null)
value = String.Empty;
else
value = value.Trim();
if (!IsHeaderValue(value))
throw new ArgumentException("invalid header value");
ThrowIfRestricted(name);
base.Set(name, value);
}
internal string ToStringMultiValue()
{
StringBuilder sb = new StringBuilder();
int count = base.Count;
for (int i = 0; i < count; i++)
{
string key = GetKey(i);
if (IsMultiValue(key))
{
foreach (string v in GetValues(i))
{
sb.Append(key)
.Append(": ")
.Append(v)
.Append("\r\n");
}
}
else
{
sb.Append(key)
.Append(": ")
.Append(Get(i))
.Append("\r\n");
}
}
return sb.Append("\r\n").ToString();
}
public override string ToString()
{
StringBuilder sb = new StringBuilder();
int count = base.Count;
for (int i = 0; i < count; i++)
sb.Append(GetKey(i))
.Append(": ")
.Append(Get(i))
.Append("\r\n");
return sb.Append("\r\n").ToString();
}
// Internal Methods
// With this we don't check for invalid characters in header. See bug #55994.
internal void SetInternal(string header)
{
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
{
base.Remove(name);
base.Set(name, value);
}
}
// Private Methods
public override int Remove(string name)
{
ThrowIfRestricted(name);
return base.Remove(name);
}
protected void ThrowIfRestricted(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 appropriate property.");
}
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;
}
}
}