How to execute multi-threaded / background process in classic asp

Question

I need to send email through a background job in a classic-asp application so that the user does not have to wait for a slow web server to send email.

I know that I can use Ajax to generate two separate requests, but I would prefer not to use Javascript. Also, I suspect there is a better way to take this off. Ideas?

Answer 1

You think too narrowly. You do not need to send an email from ASP. Put it in the database, and then run a separate program that runs, say, every minute and sends all the emails that are in the database.

Answer 2

I agree with tomjen on this. Storing email in a database table and then using the internal process to actually send email works very well, especially if you send large volumes of email. I would recommend Perl for creating an email program, as there are several packages that could easily do the job.

Answer 3

There are third-party COM objects , you can receive mail with this descriptor much better than the built-in IIS. You simply send your message and process the queue so that your program immediately regains control.

Answer 4

Persits creates the well-known AspEmail COM component, which comes with a message queuing system that will do what you need.

http://www.aspemail.com/manual_07.html

Your code, in fact, disables sending a message to the queue daemon that runs on the server, and sends all the letters to the queue in a separate process, thereby not bringing your ASP script to completion.

Answer 5

Sorry, but as far as I know, there were no ways to generate a separate thread using the old ASP.

If you do not want AJAX to hide IFRAME? ugly but it works ...

Answer 6

If you do not want to use my other suggestion, you may want to run another program that simply sends email and then communicates with this program through COM or a (local) tcp socket. This should be much faster than connecting to the server over the Internet, and you avoid database latency.

Answer 7

A good way to speed up this would be to tell CDOSYS to use your web server's IIS pickup directory (usually c: \ inetpub \ mailroot \ pickup). Assuming you have a virtual SMTP server installed on your web server.

Another similar and even faster option would be to manually generate * .EML files and put them in the pickup directory. In addition, to avoid potential conflicts, you can put the files in a temporary directory, and then move the batch file to the pickup directory at regular intervals.