void ParseRequest(byte[] buffer, int startBufferOffset, int posOfReqEnd)
{
_isWebSocket = false;
_next.PrepareForRequest();
posOfReqEnd -= 2;
_responseHeaders.Clear();
_webSocketReqCondition = WebSocketReqConditions.Start;
if (_cancellation.IsCancellationRequested)
{
_cancellation = new CancellationTokenSource();
}
_responseIsChunked = false;
_responseContentLength = ulong.MaxValue;
var pos = startBufferOffset;
_isMethodHead = false;
_requestMethod = ParseHttpMethod(buffer, ref pos);
_requestScheme = _isSsl ? "https" : "http";
string reqHost;
ParseHttpPath(buffer, ref pos, out _requestPath, out _requestQueryString, ref _requestScheme, out reqHost);
ParseHttpProtocol(buffer, ref pos, out _requestProtocol);
if (!SkipCrLf(buffer, ref pos))
{
throw new Exception("Request line does not end with CRLF");
}
_isKeepAlive = !_isHttp10;
ShouldSend100Continue = false;
RequestContentLength = 0;
RequestIsChunked = false;
if (!ParseHttpHeaders(buffer, pos, posOfReqEnd))
{
throw new Exception("Request headers cannot be parsed");
}
}
string ParseHttpMethod(byte[] buffer, ref int pos)
{
var p = pos;
var start = p;
switch (buffer[p])
{
case (byte)'G':
if (buffer[p + 1] == 'E' && buffer[p + 2] == 'T' && buffer[p + 3] == ' ')
{
pos = p + 4;
_webSocketReqCondition |= WebSocketReqConditions.GetMethod;
return("GET");
}
break;
case (byte)'P':
if (buffer[p + 1] == 'O' && buffer[p + 2] == 'S' && buffer[p + 3] == 'T' && buffer[p + 4] == ' ')
{
pos = p + 5;
return("POST");
}
if (buffer[p + 1] == 'U' && buffer[p + 2] == 'T' && buffer[p + 3] == ' ')
{
pos = p + 4;
return("PUT");
}
break;
case (byte)'H':
if (buffer[p + 1] == 'E' && buffer[p + 2] == 'A' && buffer[p + 3] == 'D' && buffer[p + 4] == ' ')
{
pos = p + 5;
_isMethodHead = true;
return("HEAD");
}
break;
case (byte)'D':
if (buffer[p + 1] == 'E' && buffer[p + 2] == 'L' && buffer[p + 3] == 'E' && buffer[p + 4] == 'T' && buffer[p + 5] == 'E' && buffer[p + 6] == ' ')
{
pos = p + 7;
return("DELETE");
}
break;
case (byte)'T':
if (buffer[p + 1] == 'R' && buffer[p + 2] == 'A' && buffer[p + 3] == 'C' && buffer[p + 4] == 'E' && buffer[p + 5] == ' ')
{
pos = p + 6;
return("TRACE");
}
break;
case (byte)'O':
if (buffer[p + 1] == 'P' && buffer[p + 2] == 'T' && buffer[p + 3] == 'I' && buffer[p + 4] == 'O' && buffer[p + 5] == 'N' && buffer[p + 6] == 'S' && buffer[p + 7] == ' ')
{
pos = p + 8;
return("OPTIONS");
}
break;
case (byte)' ':
{
pos = p + 1;
return("");
}
case 13:
{
return("");
}
}
p++;
while (true)
{
var b = buffer[p];
if (b == (byte)' ')
{
pos = p + 1;
break;
}
if (b == 13)
{
pos = p;
break;
}
p++;
}
return(StringFromLatin1(buffer, start, p));
}
void ProcessRequestHeader(string name, string value)
{
if (name.Equals("Connection", StringComparison.OrdinalIgnoreCase))
{
if (_isHttp10)
{
if (value.Equals("Keep-Alive", StringComparison.OrdinalIgnoreCase))
{
_isKeepAlive = true;
}
}
else
{
if (value.Equals("Close", StringComparison.OrdinalIgnoreCase))
{
_isKeepAlive = false;
}
else if (value.IndexOf("Upgrade", StringComparison.OrdinalIgnoreCase) >= 0)
{
_webSocketReqCondition |= WebSocketReqConditions.ConnectionUpgrade;
}
}
}
else if (name.Equals("Expect", StringComparison.OrdinalIgnoreCase))
{
if (value.Equals("100-Continue", StringComparison.OrdinalIgnoreCase))
{
ShouldSend100Continue = true;
}
}
else if (name.Equals("Content-Length", StringComparison.OrdinalIgnoreCase))
{
if (!ulong.TryParse(value, out RequestContentLength))
{
throw new InvalidDataException(string.Format("Wrong request content length: {0}", value));
}
}
else if (name.Equals("Transfer-Encoding", StringComparison.OrdinalIgnoreCase))
{
if (value.Equals("chunked", StringComparison.OrdinalIgnoreCase))
{
RequestIsChunked = true;
RequestContentLength = ulong.MaxValue;
}
}
else if (name.Equals("Upgrade", StringComparison.OrdinalIgnoreCase))
{
if (value.Equals("websocket", StringComparison.OrdinalIgnoreCase))
{
_webSocketReqCondition |= WebSocketReqConditions.UpgradeWebSocket;
}
}
else if (name.Equals("Sec-WebSocket-Version", StringComparison.OrdinalIgnoreCase))
{
if (value == "13")
{
_webSocketReqCondition |= WebSocketReqConditions.Version13;
}
}
else if (name.Equals("Sec-WebSocket-Key", StringComparison.OrdinalIgnoreCase))
{
_webSocketReqCondition |= WebSocketReqConditions.ValidKey;
_webSocketKey = value;
}
_next.AddRequestHeader(name, value);
}
string ParseHttpMethod(byte[] buffer, ref int pos)
{
var p = pos;
var start = p;
switch (buffer[p])
{
case (byte)'G':
if (buffer[p + 1] == 'E' && buffer[p + 2] == 'T' && buffer[p + 3] == ' ')
{
pos = p + 4;
_webSocketReqCondition |= WebSocketReqConditions.GetMethod;
return "GET";
}
break;
case (byte)'P':
if (buffer[p + 1] == 'O' && buffer[p + 2] == 'S' && buffer[p + 3] == 'T' && buffer[p + 4] == ' ')
{
pos = p + 5;
return "POST";
}
if (buffer[p + 1] == 'U' && buffer[p + 2] == 'T' && buffer[p + 3] == ' ')
{
pos = p + 4;
return "PUT";
}
break;
case (byte)'H':
if (buffer[p + 1] == 'E' && buffer[p + 2] == 'A' && buffer[p + 3] == 'D' && buffer[p + 4] == ' ')
{
pos = p + 5;
_isMethodHead = true;
return "HEAD";
}
break;
case (byte)'D':
if (buffer[p + 1] == 'E' && buffer[p + 2] == 'L' && buffer[p + 3] == 'E' && buffer[p + 4] == 'T' && buffer[p + 5] == 'E' && buffer[p + 6] == ' ')
{
pos = p + 7;
return "DELETE";
}
break;
case (byte)'T':
if (buffer[p + 1] == 'R' && buffer[p + 2] == 'A' && buffer[p + 3] == 'C' && buffer[p + 4] == 'E' && buffer[p + 5] == ' ')
{
pos = p + 6;
return "TRACE";
}
break;
case (byte)'O':
if (buffer[p + 1] == 'P' && buffer[p + 2] == 'T' && buffer[p + 3] == 'I' && buffer[p + 4] == 'O' && buffer[p + 5] == 'N' && buffer[p + 6] == 'S' && buffer[p + 7] == ' ')
{
pos = p + 8;
return "OPTIONS";
}
break;
case (byte)' ':
{
pos = p + 1;
return "";
}
case 13:
{
return "";
}
}
p++;
while (true)
{
var b = buffer[p];
if (b == (byte)' ')
{
pos = p + 1;
break;
}
if (b == 13)
{
pos = p;
break;
}
p++;
}
return StringFromLatin1(buffer, start, p);
}
void ProcessRequestHeader(string name, string value)
{
if (name.Equals("Connection", StringComparison.OrdinalIgnoreCase))
{
if (_isHttp10)
{
if (value.Equals("Keep-Alive", StringComparison.OrdinalIgnoreCase))
{
_isKeepAlive = true;
}
}
else
{
if (value.Equals("Close", StringComparison.OrdinalIgnoreCase))
{
_isKeepAlive = false;
}
else if (value.IndexOf("Upgrade", StringComparison.OrdinalIgnoreCase) >= 0)
{
_webSocketReqCondition |= WebSocketReqConditions.ConnectionUpgrade;
}
}
}
else if (name.Equals("Expect", StringComparison.OrdinalIgnoreCase))
{
if (value.Equals("100-Continue", StringComparison.OrdinalIgnoreCase))
{
ShouldSend100Continue = true;
}
}
else if (name.Equals("Content-Length", StringComparison.OrdinalIgnoreCase))
{
if (!ulong.TryParse(value, out RequestContentLength))
{
throw new InvalidDataException(string.Format("Wrong request content length: {0}", value));
}
}
else if (name.Equals("Transfer-Encoding", StringComparison.OrdinalIgnoreCase))
{
if (value.Equals("chunked", StringComparison.OrdinalIgnoreCase))
{
RequestIsChunked = true;
RequestContentLength = ulong.MaxValue;
}
}
else if (name.Equals("Upgrade", StringComparison.OrdinalIgnoreCase))
{
if (value.Equals("websocket", StringComparison.OrdinalIgnoreCase))
{
_webSocketReqCondition |= WebSocketReqConditions.UpgradeWebSocket;
}
}
else if (name.Equals("Sec-WebSocket-Version", StringComparison.OrdinalIgnoreCase))
{
if (value == "13")
{
_webSocketReqCondition |= WebSocketReqConditions.Version13;
}
}
else if (name.Equals("Sec-WebSocket-Key", StringComparison.OrdinalIgnoreCase))
{
_webSocketReqCondition |= WebSocketReqConditions.ValidKey;
_webSocketKey = value;
}
_next.AddRequestHeader(name, value);
}
void ParseRequest(byte[] buffer, int startBufferOffset, int posOfReqEnd)
{
_isWebSocket = false;
_next.PrepareForRequest();
posOfReqEnd -= 2;
_responseHeaders.Clear();
_webSocketReqCondition = WebSocketReqConditions.Start;
if (_cancellation.IsCancellationRequested)
_cancellation = new CancellationTokenSource();
_responseIsChunked = false;
_responseContentLength = ulong.MaxValue;
var pos = startBufferOffset;
_isMethodHead = false;
_requestMethod = ParseHttpMethod(buffer, ref pos);
_requestScheme = _isSsl ? "https" : "http";
string reqHost;
ParseHttpPath(buffer, ref pos, out _requestPath, out _requestQueryString, ref _requestScheme, out reqHost);
ParseHttpProtocol(buffer, ref pos, out _requestProtocol);
if (!SkipCrLf(buffer, ref pos)) throw new Exception("Request line does not end with CRLF");
_isKeepAlive = !_isHttp10;
ShouldSend100Continue = false;
RequestContentLength = 0;
RequestIsChunked = false;
if (!ParseHttpHeaders(buffer, pos, posOfReqEnd))
throw new Exception("Request headers cannot be parsed");
}
string ParseHttpMethod(byte[] buffer, ref int pos)
{
var p = pos;
var start = p;
switch (buffer[p])
{
case (byte)'G':
if (buffer[p + 1] == 'E' && buffer[p + 2] == 'T' && buffer[p + 3] == ' ')
{
pos = p + 4;
_webSocketReqCondition |= WebSocketReqConditions.GetMethod;
return "GET";
}
break;
case (byte)'P':
if (buffer[p + 1] == 'O' && buffer[p + 2] == 'S' && buffer[p + 3] == 'T' && buffer[p + 4] == ' ')
{
pos = p + 5;
return "POST";
}
break;
case (byte)' ':
{
pos = p + 1;
return "";
}
case 13:
{
return "";
}
}
p++;
while (true)
{
var b = buffer[p];
if (b == (byte)' ')
{
pos = p + 1;
break;
}
if (b == 13)
{
pos = p;
break;
}
}
return StringFromLatin1(buffer, start, p);
}
