public static async Task HandleWebSocketRequestAsync(HttpContext context)
{
void BadRequest(string message)
{
context.Response.StatusCode = StatusCodes.Status400BadRequest;
context.Response.ContentType = "text/plain; charset=utf-8";
using (var sw = new System.IO.StreamWriter(context.Response.Body)) {
sw.WriteLine(message);
}
}
//
// Make sure we get a good ID
//
if (!context.Request.Query.TryGetValue("id", out var idValues))
{
BadRequest("Missing `id`");
return;
}
var id = idValues.LastOrDefault();
if (id == null || id.Length != 32)
{
BadRequest("Invalid `id`");
return;
}
//
// Clear old sessions
//
var toClear = pendingSessions.Where(x => (DateTime.UtcNow - x.Value.CreateTimeUtc) > SessionTimeout).ToList();
foreach (var c in toClear)
{
pendingSessions.TryRemove(c.Key, out var _);
}
//
// Find the pending session
//
if (!pendingSessions.TryRemove(id, out var activeSession))
{
BadRequest("Unknown `id`");
return;
}
//
// Set the element's dimensions
//
if (!context.Request.Query.TryGetValue("w", out var wValues) || wValues.Count < 1)
{
BadRequest("Missing `w`");
return;
}
if (!context.Request.Query.TryGetValue("h", out var hValues) || hValues.Count < 1)
{
BadRequest("Missing `h`");
return;
}
var icult = System.Globalization.CultureInfo.InvariantCulture;
if (!double.TryParse(wValues.Last(), System.Globalization.NumberStyles.Any, icult, out var w))
{
w = 640;
}
if (!double.TryParse(hValues.Last(), System.Globalization.NumberStyles.Any, icult, out var h))
{
h = 480;
}
//
// OK, Run
//
var token = CancellationToken.None;
var webSocket = await context.WebSockets.AcceptWebSocketAsync("ooui");
var session = new Ooui.WebSocketSession(webSocket, activeSession.Element, w, h, token);
await session.RunAsync().ConfigureAwait(false);
}
public static async Task HandleWebSocketRequestAsync(HttpContext context)
{
void BadRequest(string message)
{
context.Response.StatusCode = StatusCodes.Status400BadRequest;
context.Response.ContentType = "text/plain; charset=utf-8";
using (var sw = new System.IO.StreamWriter(context.Response.Body)) {
sw.WriteLine(message);
}
}
//
// Make sure we get a good ID
//
if (!context.Request.Query.TryGetValue("id", out var idValues))
{
BadRequest("Missing `id`");
return;
}
var id = idValues.LastOrDefault();
if (id == null || id.Length != 32)
{
BadRequest("Invalid `id`");
return;
}
//
// Clear old sessions
//
var toClear = pendingSessions.Where(x => (DateTime.UtcNow - x.Value.CreateTimeUtc) > SessionTimeout).ToList();
foreach (var c in toClear)
{
pendingSessions.TryRemove(c.Key, out var _);
}
//
// Find the pending session
//
if (!pendingSessions.TryRemove(id, out var activeSession))
{
BadRequest("Unknown `id`");
return;
}
//
// Set the element's dimensions
//
if (!context.Request.Query.TryGetValue("w", out var wValues) || wValues.Count < 1)
{
BadRequest("Missing `w`");
return;
}
if (!context.Request.Query.TryGetValue("h", out var hValues) || hValues.Count < 1)
{
BadRequest("Missing `h`");
return;
}
var icult = System.Globalization.CultureInfo.InvariantCulture;
if (!double.TryParse(wValues.Last(), System.Globalization.NumberStyles.Any, icult, out var w))
{
w = 640;
}
if (!double.TryParse(hValues.Last(), System.Globalization.NumberStyles.Any, icult, out var h))
{
h = 480;
}
//
// OK, Run
//
var token = CancellationToken.None;
System.Net.WebSockets.WebSocket webSocket = null;
void Error(string m, Exception e) => activeSession?.Logger?.LogWarning(e, m);
//
// Create a new session and let it handle everything from here
//
try {
webSocket = await context.WebSockets.AcceptWebSocketAsync("ooui").ConfigureAwait(false);
var session = new Ooui.WebSocketSession(webSocket, activeSession.Element, activeSession.DisposeElementAfterSession, w, h, Error, token);
await session.RunAsync().ConfigureAwait(false);
}
catch (System.Net.WebSockets.WebSocketException ex) when(ex.WebSocketErrorCode == System.Net.WebSockets.WebSocketError.ConnectionClosedPrematurely)
{
// The remote party closed the WebSocket connection without completing the close handshake.
}
catch (Exception ex) {
context.Abort();
activeSession?.Logger?.LogWarning(ex, "Web socket session failed");
}
finally {
webSocket?.Dispose();
}
}
