PRB: ASP Does Not Provide Progress Notifications to Client Browsers (243547)
The information in this article applies to:
- Microsoft Active Server Pages, when used with:
- Microsoft Internet Information Server
This article was previously published under Q243547 SYMPTOMS
Active Server Pages (ASP) does not provide a mechanism for notifying browser clients of progress while a long running task is executed on the server.
CAUSE
ASP is constrained by HTTP, which is inherently stateless and does not provide a mechanism for callback notifications.
RESOLUTION
Because ASP is executed procedurally and synchronously, avoid calling long-running methods or components that perform extensive work, directly from your ASP pages. Calling long-running methods or components negatively impacts performance and scalability of your Web server.
A common scalable solution is to hand off the request to Message Queue Server (MSMQ) and provide e-mail notifications to the client. In this scenario, the ASP page immediately returns a response to the client indicating success or failure and that the user will be notified by e-mail when processing is complete.
| Modification Type: | Major | Last Reviewed: | 10/23/2003 |
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| Keywords: | kbEventService kbprb KB243547 |
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