asp.net：停止响应，继续执行

Question

In asp.net I want to give the customer an immediate response and close the connection, and then continue execution which may be lengthy and display unimportant messages. But none of this should be visible to the customer.

I already tried Response.Flush / Close / End , CompleteRequest and anonymous delegates, but couldn't get it to work with any of this.

Sample:

Response.Write("time: "+HttpContext.Current.Session["test"]);

MagicallyEndReponse(); //But how?

Thread.Sleep(10000);                                 //Customer should not experience any delay
HttpContext.Current.Session["test"] = DateTime.Now;  //This should be available when reloading 15s later
Response.Write("BORING INFO!");                      //Customer should not see this

Answer 1

I wouldn't recommend background thread processing in an ASP.NET application, it's not what ASP.NET or IIS is designed for.

My advice would be look at having a separate service (eg an internal Windows Service) which picks up work from the website and processes it, this would allow you to write a more robust multi-threaded application. You could use a durable messaging system like MSMQ / NServiceBus to pass messages to / from the service (this would mean no work is lost if the website happened to go down or restart).

The natural response for these types of request would be 202 Accepted and then possibly exposing an API for the client to query to check on the progress.