[Okta Webinar] Learn how to a build a cloud-first strategyRegister Now

x
?
Solved

Send HTML back to the user before ISAPI exits

Posted on 1999-01-15
2
Medium Priority
?
195 Views
Last Modified: 2013-11-20
Hi,

I’m programming an ISAPI Dll using Ms VC++ 5.0
After requesting the function “housekeep “ of this dll, the dll will start cleaning databases and tmp files.
Because this housekeep can take up to 10 minutes I only want to report housekeep is started ( by html).
Because the html queue is only flushed if the thread ( function call ) is ended the user needs to wait 10 minutes before he receives this message. How can I directly send the html message and continue the housekeep ( complete housekeep report will be sended afterward by email ). I have tried to override the httpextensionproc but that seems no solution. Maybe someone can help with source code or suggestions to direct send html back to the client instead of waiting the thread exits …

Thanks in advanced,
Ron Daemen

0
Comment
Question by:Daemen
2 Comments
 
LVL 86

Expert Comment

by:jkr
ID: 1327753
Well, i'm not familiar with ISAPI programming, but the situation is well known to me...
So, why don't you simply start a worker thread in 'housekeep' that does the actual work and return from the function immediately?
0
 
LVL 11

Accepted Solution

by:
mikeblas earned 100 total points
ID: 1327754
I'll assume you're using MFC, since you've asked this in the MFC area. (You didn't specify...)

You can send a response back immediately by calling CHttpServerContext::WriteClient(). That makes you responsible for writing all the headers, as well.

You can do whatever work you want to. Spawning an extra thread as jkr suggests is the core of the solution, but it's not quite so simple in ISAPI because you have a very special operating environment. First, you'll wnat to be able to recover the therad if it hangs.  Secodn, you'll need to make sure the newly created thread gets the appropriate security context. You'll want to call GetSecurityToken() on the thread you got from IIS, and then call ImpersonateloggedInUser() with the token you get back to make the secondary thread act like the right security context.

Of course, you'll call RevertToSelf() when it's all done.

B ekiM




0

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Introduction: Dialogs (2) modeless dialog and a worker thread.  Handling data shared between threads.  Recursive functions. Continuing from the tenth article about sudoku.   Last article we worked with a modal dialog to help maintain informat…
If you use Adobe Reader X it is possible you can't open OLE PDF documents in the standard. The reason is the 'save box mode' in adobe reader X. Many people think the protected Mode of adobe reader x is only to stop the write access. But this fe…
This video will show you how to get GIT to work in Eclipse.   It will walk you through how to install the EGit plugin in eclipse and how to checkout an existing repository.
Please read the paragraph below before following the instructions in the video — there are important caveats in the paragraph that I did not mention in the video. If your PaperPort 12 or PaperPort 14 is failing to start, or crashing, or hanging, …
Suggested Courses

873 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question