/// <summary>
/// Handle an Open Viewtop HTTP or Websocket request
/// </summary>
async public Task ProcessOpenViewtopRequestAsync(HttpContext context)
{
// Process web sockets to allow login and authentication
var request = context.Request;
if (request.Path == "/ovt/ws" && context.Request.IsWebSocketRequest)
{
PurgeInactiveSessions();
await ProcessOpenViewtopWebSocketsAsync(context.AcceptWebSocket("viewtop"));
return;
}
if (request.Path == "/ovt/info")
{
// Do not send when IP address is on the public internet. TBD: Allow 172.17, etc.
var ip = ((IPEndPoint)context.RemoteEndPoint).Address.ToString();
bool localIp = mLocalIpAddresses.FindIndex((a) => ip.StartsWith(a)) >= 0;
var info = new Info();
info.Local = LocalComputerInfo;
info.Remotes = localIp ? RemoteComputerInfo : new ComputerInfo[0];
await context.SendResponseAsync(JsonConvert.SerializeObject(info));
return;
}
// Requests with a valid SID (session id) get routed to the session
long sid = request.Query["sid", 0];
if (sid != 0)
{
ViewtopSession session;
lock (mLock)
mSessions.TryGetValue(sid, out session);
if (session == null)
{
throw new HttpException(400, "Unknown 'sid'");
}
await session.ProcessOpenViewtopRequestAsync(context);
return;
}
// *** Serve public static files ***
// Convert path to Windows, strip leading "\", and choose "index" if no name is given
string path = request.Path.Replace('/', Path.DirectorySeparatorChar);
while (path.Length != 0 && path[0] == Path.DirectorySeparatorChar)
{
path = path.Substring(1);
}
if (path.Length == 0)
{
path = "index.html";
}
string publicSubdirectory = Path.Combine(Path.GetDirectoryName(System.Windows.Forms.Application.ExecutablePath), "www");
string hiddenFileName = Path.DirectorySeparatorChar + ".";
// Never serve files outside of the public subdirectory, or that begin with a "."
path = Path.Combine(publicSubdirectory, path);
if (path.Contains("..") || path.Contains(hiddenFileName))
{
throw new HttpException(400, "Invalid Request: File name is invalid", true);
}
if (request.Method != "GET")
{
throw new HttpException(405, "Invalid HTTP request: Only GET method is allowed for serving ");
}
if (mMimeTypes.TryGetValue(Path.GetExtension(path).ToLower(), out string contentType))
{
context.Response.ContentType = contentType;
}
await context.SendFileAsync(path);
}