OnBeforeCreate-event.md

The OnBeforeCreate event is fired just before a file is created.

Calling FailRequest on the BeforeCreateContext passed to the callback will reject the request with a 400 Bad Request status code. Calling FailRequest multiple times will concatenate the error messages.

ℹ️ Note that this event only fires for client requests and not when manually calling the store's methods.

app.UseTus(context => new DefaultTusConfiguration
{
	UrlPath = "/files",
	Store = new TusDiskStore(@"C:\tusfiles\"),
	Events = new Events
	{
		OnBeforeCreateAsync = ctx =>
		{
			if (!ctx.Metadata.ContainsKey("name"))
			{
				ctx.FailRequest("name metadata must be specified. ");
			}

			if (!ctx.Metadata.ContainsKey("contentType"))
			{
				ctx.FailRequest("contentType metadata must be specified. ");
			}

			return Task.CompletedTask;
		}
});