Web server instances?

Question

Very newbie question, please forgive me:

I'm creating an asp.net website. I assume that when multiple people request the page each person gets a new instance of the site. However, if the site uses a .jpg image on the server and manipulates the image, does each person get an instance of the image also, or do they share the image somehow? I think I know, and that this is probably a dumb question, but I wanted to ask.

As an example: A user logs into the site, and adds times to a schedule. Depending on the schedule, a blue line is drawn on an image (grid.jpg), which depicts a daily timeline. The image is then saved as newgrid.jpg and displayed to the user. Is there a way for each user to get an instance of the image that only they can see?

You deploy a site to a folder on a server. You create a site in IIS. All requests/users share the same site. If you made changes to physical files served up by this site, all users see the changes. If you want to isolate users so they can't see other peoples changes you would use Session data or some other persistant storage for seperating users or implement some sort of directory structure so that User X has his own content and User Y their own. — Nick Bork, May 22 '12 at 21:12
@Nick Is that something I do in the site code, or is that something I do when I deploy the site on the server? — Jake Gaston, May 22 '12 at 21:15
@JakeGaston : That is something you have to take care of yourself; yes, in your code! — Styxxy, May 22 '12 at 21:21

score 2 · Accepted Answer · edited May 23 '17 at 12:27

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A great way to generate dynamic images in ASP.NET is by using a Handler. The answer over here offers a good, simple example. In this scenario, the generated image never touches the local file system, it's just generated in memory, and returned to the client.

edited May 23 '17 at 12:27

Community

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answered May 22 '12 at 21:42

Snixtor

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Thanks for the link. I think this might guide me in the right direction. – Jake Gaston May 23 '12 at 16:44

score 0 · Answer 2 · answered May 22 '12 at 21:14

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Well, usually the site is always the same for all users, but there are sessions created for each user with specific settings that you can set. So yes, all people will by default see the same changes (and the same content).

answered May 22 '12 at 21:14

Mario S

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Web server instances?

2 Answers2