protected virtual bool AuthorizeRequest(WebSocketClient client, HttpHeader header)
{
return(true);
}
private void ProcessHttpData(WebSocketClient client, byte[] buffer, int offset, int length)
{
var encoding = Encoding.GetEncoding(1252);
var data = encoding.GetString(buffer, offset, length);
int pos;
bool hasRowFeed;
while ((pos = HttpHeader.FindHttpHeaderEnd(ref data, out hasRowFeed)) != -1)
{
if (client.Buffer.Length > 0)
{
pos += client.Buffer.Length;
data = encoding.GetString(client.Buffer.InternalBuffer, 0, client.Buffer.Length) + data;
client.Buffer.Reset();
}
var packet = data.Substring(0, pos);
data = data.Substring(pos + (hasRowFeed ? 4 : 2));
if (packet.Length > 0)
{
// log packet
//System.IO.File.AppendAllText("web_datalog.txt", string.Format("[{0}]\r\n{1}\r\n\r\n", DateTime.Now.ToString("HH:mm:ss"), packet));
HttpHeader header;
try
{
foreach (char c in packet)
{
if (c == 0)
{
throw new UrlDecodingException(string.Empty);
}
}
if (packet.Contains("%0"))
{
throw new UrlDecodingException(string.Empty);
}
header = HttpHeader.ParseHeader(ref packet);
}
catch (UrlDecodingException ex)
{
client.SendErrorResponse(500, "Internal Error", "Malformed URL" +
(ex.Message.Length > 0 ? (": " + ex.Message) : "."));
client.Disconnect(ex.Message);
return;
}
if (string.Compare(header.Version, "HTTP/1.1", true) != 0)
{
client.Disconnect("Invalid HTTP verson: " + header.Version);
return;
}
if (header.Method == HttpRequestMethod.Unknown)
{
client.Disconnect("Invalid request method.");
return;
}
////////////////////////////////////////////////////////////////////////////////////////////
// Reverse Proxy implementation
/*
* X-Original-URL: /app/assets/img/icon_plus.png
* X-Forwarded-For: 78.70.113.225:65346
* X-ARR-LOG-ID: 7b5980f7-9854-45f4-91cf-6cfba7cb29a9
*/
if (_isBackendServer)
{
string reverseProxyIp = null;
if (header.GetParameter("X-Forwarded-For", ref reverseProxyIp))
{
int colonPos;
if ((colonPos = reverseProxyIp.IndexOf(':')) != -1)
{
reverseProxyIp = reverseProxyIp.Substring(0, colonPos);
}
if (reverseProxyIp.Length > 0)
{
//Logger.Log(LogType.Warning, "X-Forwarded-For in request was empty.");
client.SetUserAddress(reverseProxyIp);
}
}
}
////////////////////////////////////////////////////////////////////////////////////////////
long contentLength = 0;
header.GetParameter("Content-Length", ref contentLength); // does not edit contentLength if the parameter doesn't exist
if (contentLength != 0) // we only handle websocket initial http requests, no content is expected
{
client.Disconnect("Client sent unexpected content of " + contentLength + " bytes");
return;
}
InternalHandleRequest(client, header);
if (client.IsDisconnect)
{
return;
}
}
}
if (data.Length > 0)
{
var binaryData = encoding.GetBytes(data);
client.Buffer.Offset = client.Buffer.Length;
client.Buffer.Write(binaryData, 0, binaryData.Length);
}
}
