Re: tomcat session id

2012-07-16 Thread Konstantin Kolinko
2012/7/15 Elias Kopsiaftis yemi...@gmail.com:
 thank you, and it wasnt working thats why i asked. there must be something
 else wrong in my code

Session is recognized by sessionid sent either via a Cookie header
in HTTP request, or as a path parameter in URL of HTTP request.


You can inspect what is actually sent to Tomcat by your client
either by using network traffic inspection with a tool like Wireshark,
 or via configuration of an AccessLogValve in Tomcat.  Some references
should be in the FAQ.


If neither info are sent by your client program, the session cannot
not be associated with your request and a new session will be created
if a session is needed. (When that happens, a Set-Cookie header will
be included in the HTTP response).

Best regards,
Konstantin Kolinko

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Re: tomcat session id

2012-07-15 Thread Elias Kopsiaftis
ok i appreciate the input, but for now i will stick with the comet approach
because i read that websocket for tomcat 7 is still experimental and i
already built a lot of logic around the comet approach. does anyone know
the answer to my original question?

On Sat, Jul 14, 2012 at 1:07 PM, Christopher Schultz 
ch...@christopherschultz.net wrote:

 André,

 On Jul 14, 2012, at 6:03, André Warnier a...@ice-sa.com wrote:

  Elias Kopsiaftis wrote:
  Well basically, For the output servlet, I am using comet to keep the
  connection alive and push things out to the client when they are
 available.
  This program is a chat program with a drawing capability, so two people
 can
  draw on the same canvas and chat with each other.
 
  Isn't this just the kind of thing that websocket(s) is supposed to be
 made for ?

 Comet is basically a precursor to Websocket: the ideas are vaguely the
 same and the use cases are nearly identical.

 Elias, if I were you, I would focus on Websocket moving forward... Comet
 is going to see less and less action (globally, not just in Tomcat) a time
 goes on.

 -chris
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Re: tomcat session id

2012-07-15 Thread Christopher Schultz
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Elias,

On 7/15/12 1:37 PM, Elias Kopsiaftis wrote:
 ok i appreciate the input, but for now i will stick with the comet
 approach because i read that websocket for tomcat 7 is still
 experimental and i already built a lot of logic around the comet
 approach. does anyone know the answer to my original question?

As long as one servlet was called long-enough before the second one
that the session could be created and its id returned to the client
*and* sessions are supported, then yes, both servlets should have
access to the same session data.

It should have been easy to test this on your own ...

- -chris
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Re: tomcat session id

2012-07-15 Thread Elias Kopsiaftis
thank you, and it wasnt working thats why i asked. there must be something
else wrong in my code

On Sun, Jul 15, 2012 at 3:50 PM, Christopher Schultz 
ch...@christopherschultz.net wrote:

 -BEGIN PGP SIGNED MESSAGE-
 Hash: SHA1

 Elias,

 On 7/15/12 1:37 PM, Elias Kopsiaftis wrote:
  ok i appreciate the input, but for now i will stick with the comet
  approach because i read that websocket for tomcat 7 is still
  experimental and i already built a lot of logic around the comet
  approach. does anyone know the answer to my original question?

 As long as one servlet was called long-enough before the second one
 that the session could be created and its id returned to the client
 *and* sessions are supported, then yes, both servlets should have
 access to the same session data.

 It should have been easy to test this on your own ...

 - -chris
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Re: tomcat session id

2012-07-15 Thread Christopher Schultz
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Elias,

On 7/15/12 3:52 PM, Elias Kopsiaftis wrote:
 thank you, and it wasnt working thats why i asked. there must be
 something else wrong in my code

Would you care to *post* your code? Perhaps someone with Comet
experience could give you an opinion...

- -chris
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Re: tomcat session id

2012-07-14 Thread André Warnier

Elias Kopsiaftis wrote:

Well basically, For the output servlet, I am using comet to keep the
connection alive and push things out to the client when they are available.
This program is a chat program with a drawing capability, so two people can
draw on the same canvas and chat with each other.


Isn't this just the kind of thing that websocket(s) is supposed to be made 
for ?
You may want at least to look it up :
http://en.wikipedia.org/wiki/WebSocket

I also think that I remember a discussion a couple of days/weeks ago on this list about 
it. You may also want to check the list archives.


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Re: tomcat session id

2012-07-14 Thread Christopher Schultz
André,

On Jul 14, 2012, at 6:03, André Warnier a...@ice-sa.com wrote:

 Elias Kopsiaftis wrote:
 Well basically, For the output servlet, I am using comet to keep the
 connection alive and push things out to the client when they are available.
 This program is a chat program with a drawing capability, so two people can
 draw on the same canvas and chat with each other.
 
 Isn't this just the kind of thing that websocket(s) is supposed to be made 
 for ?

Comet is basically a precursor to Websocket: the ideas are vaguely the same and 
the use cases are nearly identical.

Elias, if I were you, I would focus on Websocket moving forward... Comet is 
going to see less and less action (globally, not just in Tomcat) a time goes on.

-chris
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Re: tomcat session id

2012-07-13 Thread Christopher Schultz
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Elias,

On 7/13/12 9:39 AM, Elias Kopsiaftis wrote:
 I am working on a program that uses two servlets, one for input
 from the client, and one for output to the client.

Good so far.

 My question is, from the client side, I will have two connections 
 open to the server, one for input, and one for output

Okay, you've lost me: what you've described is not how HTTP works. A
client makes one (or more) connection(s), sends a request (on each
connection) and receives a response over the same connection.

 so, when both connect, will both connections have the same
 sessionid even though they are accessing two different servlets?
 both servlets will be on the same tomcat

Well, if you are using cookies and your client manages them globally,
then all connections should be associated with the same session. This
is the case with most web browsers in their default configuration.

If you are using URL re-writing to maintain session affinity, then
you'll have to make sure that all of the URLs that you issue from the
client to the server have the URL properly encoded. If you have
written your webapp correctly, most of this should be taken care of by
the container. Your client also has to be willing to include path
parameters in the URLs that it passes-back to the server. This is
also the case with most web browsers in their default configuration.

But back to your plan to make separate input (to the server) and
output (from the server) connections does not make any sense unless
you have some justification for making things that complicated.

I'm available for enlightenment, though I suspect your requirements
are actually a lot simpler than what you describe.

- -chris
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Re: tomcat session id

2012-07-13 Thread Elias Kopsiaftis
Well basically, For the output servlet, I am using comet to keep the
connection alive and push things out to the client when they are available.
This program is a chat program with a drawing capability, so two people can
draw on the same canvas and chat with each other.

On Fri, Jul 13, 2012 at 10:02 PM, Christopher Schultz 
ch...@christopherschultz.net wrote:

 -BEGIN PGP SIGNED MESSAGE-
 Hash: SHA1

 Elias,

 On 7/13/12 9:39 AM, Elias Kopsiaftis wrote:
  I am working on a program that uses two servlets, one for input
  from the client, and one for output to the client.

 Good so far.

  My question is, from the client side, I will have two connections
  open to the server, one for input, and one for output

 Okay, you've lost me: what you've described is not how HTTP works. A
 client makes one (or more) connection(s), sends a request (on each
 connection) and receives a response over the same connection.

  so, when both connect, will both connections have the same
  sessionid even though they are accessing two different servlets?
  both servlets will be on the same tomcat

 Well, if you are using cookies and your client manages them globally,
 then all connections should be associated with the same session. This
 is the case with most web browsers in their default configuration.

 If you are using URL re-writing to maintain session affinity, then
 you'll have to make sure that all of the URLs that you issue from the
 client to the server have the URL properly encoded. If you have
 written your webapp correctly, most of this should be taken care of by
 the container. Your client also has to be willing to include path
 parameters in the URLs that it passes-back to the server. This is
 also the case with most web browsers in their default configuration.

 But back to your plan to make separate input (to the server) and
 output (from the server) connections does not make any sense unless
 you have some justification for making things that complicated.

 I'm available for enlightenment, though I suspect your requirements
 are actually a lot simpler than what you describe.

 - -chris
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