public void SendError(string msg, int status)
{
try
{
HttpListenerResponse response = _context.Response;
response.StatusCode = status;
response.ContentType = "text/html";
string description = HttpStatusDescription.Get(status);
string str;
if (msg != null)
{
str = string.Format("<h1>{0} ({1})</h1>", description, msg);
}
else
{
str = string.Format("<h1>{0}</h1>", description);
}
byte[] error = _textEncoding.GetDefaultEncoding().GetBytes(str);
response.Close(error, false);
}
catch
{
// response was already closed
}
}
internal void SetRequestLine(string req)
{
string[] parts = req.Split(s_separators, 3);
if (parts.Length != 3)
{
_context.ErrorMessage = "Invalid request line (parts).";
return;
}
_method = parts[0];
foreach (char c in _method)
{
int ic = (int)c;
if ((ic >= 'A' && ic <= 'Z') ||
(ic > 32 && c < 127 && c != '(' && c != ')' && c != '<' &&
c != '<' && c != '>' && c != '@' && c != ',' && c != ';' &&
c != ':' && c != '\\' && c != '"' && c != '/' && c != '[' &&
c != ']' && c != '?' && c != '=' && c != '{' && c != '}'))
{
continue;
}
_context.ErrorMessage = "(Invalid verb)";
return;
}
_rawUrl = parts[1];
if (parts[2].Length != 8 || !parts[2].StartsWith("HTTP/"))
{
_context.ErrorMessage = "Invalid request line (version).";
return;
}
try
{
_version = new Version(parts[2].Substring(5));
}
catch
{
_context.ErrorMessage = "Invalid request line (version).";
return;
}
if (_version.Major < 1)
{
_context.ErrorMessage = "Invalid request line (version).";
return;
}
if (_version.Major > 1)
{
_context.ErrorStatus = (int)HttpStatusCode.HttpVersionNotSupported;
_context.ErrorMessage = HttpStatusDescription.Get(HttpStatusCode.HttpVersionNotSupported);
return;
}
}
internal void AddHeader(string header)
{
int colon = header.IndexOf(':');
if (colon == -1 || colon == 0)
{
_context.ErrorMessage = HttpStatusDescription.Get(400);
_context.ErrorStatus = 400;
return;
}
string name = header.Substring(0, colon).Trim();
string val = header.Substring(colon + 1).Trim();
if (name.Equals("content-length", StringComparison.OrdinalIgnoreCase))
{
// To match Windows behavior:
// Content lengths >= 0 and <= long.MaxValue are accepted as is.
// Content lengths > long.MaxValue and <= ulong.MaxValue are treated as 0.
// Content lengths < 0 cause the requests to fail.
// Other input is a failure, too.
long parsedContentLength =
ulong.TryParse(val, out ulong parsedUlongContentLength) ? (parsedUlongContentLength <= long.MaxValue ? (long)parsedUlongContentLength : 0) :
long.Parse(val);
if (parsedContentLength < 0 || (_clSet && parsedContentLength != _contentLength))
{
_context.ErrorMessage = "Invalid Content-Length.";
}
else
{
_contentLength = parsedContentLength;
_clSet = true;
}
}
else if (name.Equals("transfer-encoding", StringComparison.OrdinalIgnoreCase))
{
if (Headers[HttpKnownHeaderNames.TransferEncoding] != null)
{
_context.ErrorStatus = (int)HttpStatusCode.NotImplemented;
_context.ErrorMessage = HttpStatusDescription.Get(HttpStatusCode.NotImplemented);
}
}
if (_context.ErrorMessage == null)
{
_headers.Set(name, val);
}
}
private void OnReadInternal(IAsyncResult ares)
{
//_timer.Change(Timeout.Infinite, Timeout.Infinite);
int nread = -1;
try
{
nread = _stream.EndRead(ares);
_memoryStream.Write(_buffer, 0, nread);
if (_memoryStream.Length > 32768)
{
SendError("Bad Request", 400);
Close(true);
return;
}
}
catch
{
if (_memoryStream != null && _memoryStream.Length > 0)
{
SendError();
}
if (_socket != null)
{
CloseSocket();
Unbind();
}
return;
}
if (nread == 0)
{
CloseSocket();
Unbind();
return;
}
if (ProcessInput(_memoryStream))
{
if (!_context.HaveError)
{
_context.Request.FinishInitialization();
}
if (_context.HaveError)
{
SendError();
Close(true);
return;
}
if (!_epl.BindContext(_context))
{
const int NotFoundErrorCode = 404;
SendError(HttpStatusDescription.Get(NotFoundErrorCode), NotFoundErrorCode);
Close(true);
return;
}
HttpListener listener = _epl.Listener;
if (_lastListener != listener)
{
RemoveConnection();
listener.AddConnection(this);
_lastListener = listener;
}
_contextBound = true;
listener.RegisterContext(_context);
return;
}
_stream.BeginRead(_buffer, 0, BufferSize, s_onreadCallback, this);
}
