Hi. Would you please solve me my problems with sessions and cookies?

[Rani Ahmed <ra...@gmail.com>]

I am making a tutorial youtube playlist about Tc/Rivet on this play list:

http://www.youtube.com/playlist?list=PLsAEIIjTPIo9YxfvYeAPfRHyj9d3pxazL

I have posted a question here about Sessions here:

 https://groups.google.com/forum/?hl=en#!topic/comp.lang.tcl/HM6r-82dbAo

========
my second question is about cookies according to this code:

http://pastebin.com/GBtH2fEr

and I am getting "headers already sent"

so would you help me?
 I am also self-learning Tcl/Rivet and trying to make rivet surface like
PHP.

Re: Hi. Would you please solve me my problems with sessions and cookies?

[Massimo Manghi <mx...@apache.org>]

Hi Rani

On 01/02/2014 06:51 PM, Rani Ahmed wrote:
> I am making a tutorial youtube playlist about Tc/Rivet on this play list:
>
> http://www.youtube.com/playlist?list=PLsAEIIjTPIo9YxfvYeAPfRHyj9d3pxazL

thank you for your efforts. I already out a link on our website pointing 
to one of your videos. I will update it with this one

>
> I have posted a question here about Sessions here:
>
> https://groups.google.com/forum/?hl=en#!topic/comp.lang.tcl/HM6r-82dbAo


It doesn't make sense to me the variable ip_address disappeared from the 
array in method create_session of class Session. Did you modified 
session-class.tcl somehow?

This is the relevant code fragment

	set a(ip_address) [env REMOTE_ADDR]
	set a(session_start_time) now
	set a(session_update_time) now

	set a(session_id) [gen_session_id $a(ip_address)]

	set kf [list ip_address session_id]
	if {![$dioObject store a -table $sessionTable -keyfield $kf]} {

...debug messages here


	}

	debug "create_session: ip $a(ip_address), id '$a(session_id)'"

	return $a(session_id)

I checked also 'store' and 'makekey' in dio.tcl and they don't tamper 
with the array except for extracting the keys of the query. So, there 
must be a point where this variable vanished into a void....


>
> ========
> my second question is about cookies according to this code:
>
> http://pastebin.com/GBtH2fEr
>
> and I am getting "headers already sent"
>
> so would you help me?
>   I am also self-learning Tcl/Rivet and trying to make rivet surface
> like PHP.

I couldn't say where the problem is by looking at the code you published 
(it might be hidden somewhere in the templates parsed).

The error "headers already sent" arises when you attempt to set an HTTP 
header using Rivet's command 'headers' after the real headers have been 
sent to the client. HTTP headers are automatically sent as soon as you 
'puts' something to stdout. If you call 'headers' after that point the 
real headers have already gone and the requests exits with an error.

This error could be (and often is) related to the first example you 
showed where Session had the debug flag set. The debug message facility 
is totally unaware of the request processing status: if debugging is on 
messages are sent out data whenever a 'debug' command is run, thus 
triggering the transmission of the HTTP headers which must go first.

To avoid this it is recommended to output the debugging to a file using 
the -debugFile switch.

e.g.

Session ::SESSION -dioObject $dbms     \
    -debugMode              1           \
    -debugFile [open [file join /tmp "session-[pid].log"] w+]   \
   ... everything needed to setup your session object

During the debugging session is useful to reduce the maximum number of 
child processes created by httpd

  -- Massimo




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