Block of concurrent connections

Hi, I'm trying block simultaneous connections.

What I've done so far:

I added a new column in the table called connection connected, who holds the values 1 or 0

When a user connects, it updates the value 1.

It will open a session to the user that has the status is 0.

When users click on logout, it gives the status 0

The problem

If the user closes the browser just, how is the system supposed to know that the user connected status should be 0?

I reasoned that the onSessionEnd method would do the trick. When the session expires, it simply updates the database for this user to 0. So I put in the code but nothing.

< cffunction name = returnType 'onSessionEnd' 'Cancel' = >
< cfquery name = "updateloggedstatus" datasource = "datadsn" >
UPDATE usermanagerlogin
The VALUE logged = < cfqueryparam cfsqltype = "CF_SQL_INTEGER" value = "0" >
WHERE userid = < cfqueryparam cfsqltype = "CF_SQL_VARCHAR" value = "user1" >
< / cfquery >
< / cffunction >

In another application, I used the onSessionEnd method succesully. I used it to remove items that were in the shopping cart, which were in the database, who stopped was not complete.

< cffunction name = returnType 'onSessionEnd' 'Cancel' = >

< cfargument = "SessionScope" required = True name / >

< cfquery name = "deletesessionendticket" datasource = "tickdsn" >
DELETE FROM tbltick

WHERE oid = ' #Arguments.SessionScope.oid # '.
AND ordered = < cfqueryparam cfsqltype = "CF_SQL_INTEGER" value = "0" >
< / cfquery >

< / cffunction >

The difference between the two is that the new application is developed in cf9, while the older app was built in cf8

In the current application, the session ends successfully, it asks me to login, but the onSessionEnd method is not executed.

Any ideas?

Very much appreciated.

n_kip wrote:

What I did is I tried to have the status of the logged on user to update on '1' just at the moment where the user connects and then update the '0' State when the user disconnects. When someone tries to use the same account from another place, and the status of this account is '1', that the user would not have recorded.

I strongly suggest that you go in the other direction. Instead of not to allow the opening of the current session, put an end to the previous state of the connection. Otherwise you're condemning those who may have logged on a computer, that they no longer have access from the possibility of using another computer. For example, someone connects to work, go home and can not connect because they are connected to work.

What are you tryting to make in the case of OnSessionEnd? HOW is - it does not work?

P. S.

Have you ever noticed significant differences between these two WHERE clauses?

n_kip wrote:

WHERE userid = 

WHERE oid = '#Arguments.SessionScope.oid#'

One uses a literal string 'user1', the other uses a variable "#Arguments.SessionScope.oid #". Also the premiera would be using a variable not defined if changed to "#user1 #" while the other uses a variable in the "SessionScope' structure that is passed as part of the"Arguments"when the end of session event is triggered.

It is important to remember that the session event fires it is several extended variables that no longer exists, over the scope of the session itself. The session is terminated, the scope is no longer valid. So what was in the field of application is passed in argument of the function so that the data can be used in the event handler.

P.P.S.

I wanted to remind you of your original message that the event onSessionEnd has little or nothing to do with when a user closes a browser. Your browser does not go back to all the web sites you have visited and each say "Kip closed me ', and you probably wouldn't want to do. All servers can do is wait and wait and wait and if it receives no new applications containing known identification of an existing session data in a certain period of time then close the session. It's the session end event fires and the onSessionEnd handler to be executed.

You CAN configure only the identification data--(CFID et CFTOKEN) or JSESSIONID - normally stored in cookies to "session cookies" which are only stored in memory by the browser and retired by the browser when it is closed. So if a user opens a new browser connects to your server before the previous session has expired, the browser will present cookies previous but rather presented nine by the server, thus creating a new session. And the old one will be left to die his timeout expires.

Tags: ColdFusion

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Block of concurrent connections

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