public static async Task BroadcastAsync <T>(T msg, CancellationToken token)
{
using (var pooled = await ResponsePool.AcquireAsync().ConfigureAwait(false))
{
var buffer = ProtoBufHelper.SerializeAsArraySegment(pooled.Item, msg);
await Task.WhenAll(Clients.Select(pair => Task.Run(() => TrySendAsync(pair.Key, buffer, token), token))).ConfigureAwait(false);
}
}
public static async Task <HttpResult> ProcessRequest(HttpContext context)
{
var name = context.Request.Headers["X-SG1-Name"].FirstOrDefault().RemoveWhiteSpaces();
if (string.IsNullOrEmpty(name))
{
return new HttpResult {
StatusCode = 404, Message = "Substance Not Found"
}
}
;
var key = context.Request.Headers["X-SG1-Key"].FirstOrDefault().RemoveWhiteSpaces();
if (string.IsNullOrEmpty(key))
{
return new HttpResult {
StatusCode = 403, Message = "Access Denied"
}
}
;
try
{
using (var hmac = new HMACSHA256(Settings.Key))
if (!hmac.ComputeHash(Convert.FromBase64String(name)).FastTimingSecureEquals(Convert.FromBase64String(key)))
{
return new HttpResult {
StatusCode = 403, Message = "Access Denied"
}
}
;
}
catch (FormatException)
{
return(new HttpResult {
StatusCode = 403, Message = "Access Denied"
});
}
Transmission info;
if ((info = TransmissionsDb.Find(name)) == null)
{
return new HttpResult {
StatusCode = 404, Message = "Substance Not Found"
}
}
;
context.Response.ContentType = "application/protobuf";
using (var pooled = await ResponsePool.AcquireAsync().ConfigureAwait(false))
{
var buffer = pooled.Item;
var length = ProtoBufHelper.Serialize(buffer, info);
context.Response.ContentLength = length;
if (!await context.Response.Body.WriteAsync(buffer, 0, length, context.RequestAborted).Wrap().WithTimeout(Settings.ReadWriteTimeout).ConfigureAwait(false))
{
context.TryAbort();
return(HttpResult.Cancelled);
}
}
return(HttpResult.OK);
}
