?
Solved

Tracking Visits to my Web Site

Posted on 1997-06-24
2
Medium Priority
?
193 Views
Last Modified: 2013-12-25
A) The current web site I am working on I created using Microsoft Visual Interdev

B) the problem > I track the number of visits to the web site in a text file.  I use the Session_OnStart routine in global.asa via VBSCRIPT.

The process is to 1) load the text file in to get the count, 2) close that file, 3) re-create the file writing the new total of visits.

Finally, my question> What happens if two people access the file at the same time?  How can I protect from any possible file problems?
0
Comment
Question by:MLHAMMEL
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
2 Comments
 
LVL 5

Accepted Solution

by:
icd earned 90 total points
ID: 1828532
If two people access at the 'same time' then the worst that can happen is that one visit will not be counted. Imagine the counter having the value 100

Visitor A opens the file, reads 100
Visitor B opens the file, reads 100
Visitor A writes the value 101
Visitor B writes the value 101

With more complex data manipulations it can cause inconsitancies between dependent data which can cause your database to become corrupted.

The normal way of locking in perl is to use the 'flock' command. I have not used VBSCRIPT but there is likely to be a similar method in that language. Do a search for 'lock'. To do an update you first obtain the lock, make the read, increment it, write the file back again and then free the lock. Another process wanting to do an update will have to wait for the lock to become available.

On my own web site I don't bother with file locking in this type of case since the data is fairly inaccurate anyway. So long as it does not corrupt the data I don't mind.

0
 

Author Comment

by:MLHAMMEL
ID: 1828533
I did some research and you are right about the LOCK command.  I am using Application.Lock, Application.Unlock

Good anwser.

0

Featured Post

Free Tool: Path Explorer

An intuitive utility to help find the CSS path to UI elements on a webpage. These paths are used frequently in a variety of front-end development and QA automation tasks.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

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

It is becoming increasingly popular to have a front-page slider on a web site. Nearly every TV website,  magazine or online news has one on their site, and even some e-commerce sites have one. Today you can use sliders with Joomla, WordPress or …
I hope you'll find this tutorial useful and interesting. So let's try to extend Tcl with a new package.  For anyone more deeply interested please check out the book "Practical Programming in Tcl and Tk". It's really one of the best written books abo…
The viewer will learn how to dynamically set the form action using jQuery.
The viewer will learn how to create and use a small PHP class to apply a watermark to an image. This video shows the viewer the setup for the PHP watermark as well as important coding language. Continue to Part 2 to learn the core code used in creat…
Suggested Courses

752 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