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Need help on a session error

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TOMKA

TOMKA

IS-IT--Management
May 21, 2003
12
NO
Hi I have the following problem:

I have set my appliction.cfm file to handle session management and copied it to the directory under which I have my web pages. I have 4 formX.cfm files and the first one has a cflock command issued for a cfset Session.Name=#Form.name# hence I am setting the session variable to the name inputted on my first form page. Since I want to use the same name without people entering their names for the next 4 pages they go through, I set it up this way. Now the problem is that on a couple of machines from which I go to the page I have my site on, I have no problems updating the data and tracking the forms. However, on some others, I get

--------------------------------------------------------------------------------

Error Occurred While Processing Request
Error Diagnostic Information

An error occurred while evaluating the expression:


#Session.Name#



Error near line 23, column 12.
--------------------------------------------------------------------------------

Error resolving parameter SESSION.NAME


The session variable NAME does not exist. The cause of this error is very likely one of the following things:


The name of the session variable has been misspelled.
The session variable has not yet been created.
The session variable has timed out.


My question is: Why would I get the session variable set right on one computer but not on the others? How can I let multiple sessions run simultaneously independent ofthe computer used to access the pages?
 
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Since this behavior is not consistent, I would check the following:

Are the machines that are not working behind a firewall/proxy that is throwing out your cookies (if you are in fact using cookies)?

Do the browsers on the machines that are not working have cookies disabled?


-Tek
 
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Well, I have set the cookies option to no in application.cfm. Would this be sufficient?

Here is my application.cfm and form1.cfm which has the lock command.

<!---application tag--->
<cfapplication name=&quot;mysession&quot;
SessionManagement=&quot;yes&quot;
SessionTimeOut=&quot;#CreateTimespan(0,0,2,0)#&quot;
SetClientCookies=&quot;no&quot;>


form1.cfm:

<cflock timeout=&quot;10&quot; throwontimeout=&quot;No&quot; type=&quot;EXCLUSIVE&quot; scope=&quot;SESSION&quot;>
<cfset Session.SName=#FORM.name#>
</cflock>

<CFINSERT DATASOURCE=&quot;classgrades&quot; TABLENAME=&quot;form1&quot; FORMFIELDS=&quot;name,treatment,qd1,qd2,qd3,qd4,qd5,qd6,qd7,qd8,qd9,qd10,qd11,qd12,qd13,qd14,qd15,qd16,qd17,qd18&quot;>


<cflocation url=&quot;QCcards.htm&quot; addtoken=&quot;no&quot;>


<html>
<head>
<title>Untitled Document</title>
<meta http-equiv=&quot;Content-Type&quot; content=&quot;text/html; charset=iso-8859-1&quot;>
</head>

<body>

</body>
</html>

 
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How are you passing the cfid and cftoken if you are not using cookies? Are you passing them through the URL? All sessions need an associated cfid and cftoken; otherwise session variables will not work as the CF Server has no clue who they belong to.

-Tek
 
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Teknology is right here; cf has to know to what session the client that is requesting the template belongs to; SetClientCookies within the cfapplication tag has to be set to &quot;yes&quot;; even then it is not guaranteed that the session state will work as you don't know if the client has the cookies enabled or not; to ensure state of the session, pass the URLToken with every link you have, e.g.:

<form action=&quot;actionPage.cfm?#client.URLToken#&quot;...

or:

<a href=&quot;actionPage.cfm?#client.URLToken#&quot;... Sylvano
dsylvano@hotmail.com
 
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Thank you, thank you...I knew I was making a terrible mistake somewhere.... :)

Thank you very much!.

Kerem
 
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Now this is a naive and stupid question but do I need to collect the URL passed tokens in a <cfset> or #URL. # command? Or is it enough to just pass it?
 
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just pass it so the template you are passing it to &quot;knows&quot; from where the request came from Sylvano
dsylvano@hotmail.com
 
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Well, now I have another weird problem....I am going to lose my mind...This must not be this difficult!!!

Everything works for all the previous pages I use but from one page I make the following link:

<html>
<head>
<title>Untitled Document</title>
<meta http-equiv=&quot;Content-Type&quot; content=&quot;text/html; charset=iso-8859-1&quot;>
</head>
<body bgcolor=&quot;#FFFFFF&quot; leftmargin=&quot;0&quot; topmargin=&quot;0&quot; marginwidth=&quot;0&quot; marginheight=&quot;0&quot;>
<form name=&quot;form1&quot; method=&quot;post&quot; action=&quot;june30.cfm?#client.URLToken#&quot;>

blabla


<input name=&quot;treatment&quot; type=&quot;hidden&quot; value=&quot;us1&quot;>
<input type=&quot;submit&quot; name=&quot;Submit&quot; value=&quot;Next&quot;>
</form>
</body>
</html>

And I can see that the client.URLToken is passing all necessary IDs etc until the above page. When I click on submit on this page (for the above code) I get


What is wrong with this?

Kerem
 
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you need to put a cfoutput around the #client.urltoken# so that coldfusion knows that this is something it has to fill in
 
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But, how am I going to put a cfoutput within a form command and I have not been putting that for the previous pages for which it worked...

I am thinking that the problem is due to some html confusion somewhere but I can not see it...

K
 
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If it works on the other pages, then you DO have the #client.URLToken# between cfoutput tags. It wouldn't work if you didn't. So just wrap the form tag with opening and closing cfoutput tags.

-Tek
 
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Thank you thank you thank you thank you, once and many more again!.

K
 
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By now, probably you already hate me... but here is (most probably) my final question.

Ok, now I am able to pass the CFID and CFTOKEN settings to the last page which attempts to call the Session.Name variable I created earlier on the sequence of files I used. Now, How am I going to recover the variable to write to the access file I am using. I just finished the CFID, CFTOKEN URL passes until the last page and I am getting the Session.Name not found error again. I have put '#Session.Name#' in a cfquery call. do I need to call it differently?

Thanks once more
 
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Are you sure the CFID and CFTOKEN are getting passed to the page where you write the session variable into the database? I'd try this:

At the top of that page, do: <cfoutput>#client.URLToken#</cfoutput><cfabort>

This will tell you if the cfid and cftoken exist. I am betting that cfid and cftoken are not being passed to that last page. Also, if you are using a cflocation on any of your pages then you should always set the addtoken attribute to YES, since this will automatically include the cfid and cftoken string into the URL.

-Tek
 
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Hi,

Well, this is the html link that shows up on every page until the last one:


so I am able to carry the CFID and CFTOKEN either with cflocation which has addtoken set to yes or with a form action call to the related cfm file with cfoutput before and after the form and all with client.URLToken passed on.

I am not touching the #Session.Name# after I use it once in the first form page I use and the very last one which has the same html link above showing up with the related cfm file.
 
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This is by the way how I am starting the whole chain

<cflock timeout=&quot;10&quot; throwontimeout=&quot;No&quot; type=&quot;EXCLUSIVE&quot; scope=&quot;SESSION&quot;>
<cfset Session.SName=#FORM.name#>
</cflock>
 
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In your last post you used the reference: #Session.SName# but you've been referring to #Session.Name# in your other posts. Maybe this is the problem?

-Tek
 
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Hi,

No, sorry, I could not remember exactly which one I used but I am using Session.SName throughout..

K
 
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