session less connections

[icodk]

I have many sensors that reports periodically to a web2py application.

The sensors do not need to log in, they just POST a json string to specific controller function, get a few bytes in response and close the connection. However each time a sensor connect, a session file is generated. This create a lot of useless files. Otherwise the site has a standard user interface that requires login from users.

Is it possible  to avoid the session creation just for that controller function or do I need to make a session less app that update the same database ?

[Vinicius Assef]

Read about `sessions.forget()`[1]

[1] http://web2py.com/books/default/chapter/29/04/the-core#session

—
Vinicius.

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Resources:
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- http://web2py.com/book (Documentation)
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[Anthony]

No session file should be created unless something is actually written to the session. Are you explicitly writing something to the session anywhere during these requests, or running any code that writes to the session (e.g., processing a form)?

Anthony

[Itamar Cohen]

Thanks Vinicius, it  work for me

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Vinicius.

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[Itamar Cohen]

No, nothing is write explicitly to the session (as far as I can see), I only save the info to the database and return a string like "{}"

session.forget() looks like  solve the problem.

Thanks.

Best Regards
Itamar Cohen
Picatek
Ahornvej 27
DK-7700 Thisted
Denmark
www.picatek.dk
i...@picatek.dk
T: +45 97 91 07 82
M:+45 29 89 07 82

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Resources:
- http://web2py.com
- http://web2py.com/book (Documentation)
- http://github.com/web2py/web2py (Source code)
- https://code.google.com/p/web2py/issues/list (Report Issues)
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[Anthony]

On Sunday, September 27, 2015 at 10:28:16 AM UTC-4, icodk wrote:

No, nothing is write explicitly to the session (as far as I can see), I only save the info to the database and return a string like "{}"

session.forget() looks like  solve the problem.

Hmm, something must be writing to the session somewhere, or otherwise session.forget() would make no difference. Without session.forget(), do you see any content in the session after one of these requests?

Anthony

[Itamar Cohen]

I just deleted the  session.forget() and very quickly got a lot of sessions with about 47 bytes

I attached one but I can't make sens of what inside

Best Regards
Itamar Cohen
Picatek
Ahornvej 27
DK-7700 Thisted
Denmark
www.picatek.dk
i...@picatek.dk
T: +45 97 91 07 82
M:+45 29 89 07 82

--

[Anthony]

<Storage {'flash': ''}>

Something is setting session.flash. Does any Auth code run during these requests, or is there any form processing with a redirect?

Anthony

On Sunday, September 27, 2015 at 2:51:49 PM UTC-4, icodk wrote:

I just deleted the  session.forget() and very quickly got a lot of sessions with about 47 bytes

I attached one but I can't make sens of what inside

Best Regards
Itamar Cohen
Picatek
Ahornvej 27
DK-7700 Thisted
Denmark
www.picatek.dk
i...@picatek.dk
T: +45 97 91 07 82
M:+45 29 89 07 82

On 27 September 2015 at 20:24, Anthony wrote:

On Sunday, September 27, 2015 at 10:28:16 AM UTC-4, icodk wrote:

No, nothing is write explicitly to the session (as far as I can see), I only save the info to the database and return a string like "{}"

session.forget() looks like  solve the problem.

Hmm, something must be writing to the session somewhere, or otherwise session.forget() would make no difference. Without session.forget(), do you see any content in the session after one of these requests?

Anthony

--
Resources:
- http://web2py.com
- http://web2py.com/book (Documentation)
- http://github.com/web2py/web2py (Source code)
- https://code.google.com/p/web2py/issues/list (Report Issues)
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[Itamar Cohen]

I got these two lines in my model

session.connect(request, response, separate=True)

user_timezone = session.plugin_timezone_tz or 'UTC'

Could this be a reason ?

On 27 September 2015 at 21:50, Anthony <abas...@gmail.com> wrote:

<Storage {'flash': ''}>

Something is setting session.flash. Does any Auth code run during these requests, or is there any form processing with a redirect?

Anthony



On Sunday, September 27, 2015 at 2:51:49 PM UTC-4, icodk wrote:

I just deleted the  session.forget() and very quickly got a lot of sessions with about 47 bytes

I attached one but I can't make sens of what inside

[Anthony]

No, that code shouldn't set session.flash nor write to the session.

On Sunday, September 27, 2015 at 5:51:50 PM UTC-4, icodk wrote:

I got these two lines in my model

session.connect(request, response, separate=True)

user_timezone = session.plugin_timezone_tz or 'UTC'

Could this be a reason ?

Best Regards
Itamar Cohen
Picatek
Ahornvej 27
DK-7700 Thisted
Denmark
www.picatek.dk
i...@picatek.dk
T: +45 97 91 07 82
M:+45 29 89 07 82

On 27 September 2015 at 21:50, Anthony wrote:

<Storage {'flash': ''}>

Something is setting session.flash. Does any Auth code run during these requests, or is there any form processing with a redirect?

Anthony



On Sunday, September 27, 2015 at 2:51:49 PM UTC-4, icodk wrote:

I just deleted the  session.forget() and very quickly got a lot of sessions with about 47 bytes

I attached one but I can't make sens of what inside

Best Regards
Itamar Cohen
Picatek
Ahornvej 27
DK-7700 Thisted
Denmark
www.picatek.dk
i...@picatek.dk
T: +45 97 91 07 82
M:+45 29 89 07 82

[Itamar Cohen]

I found this line close to the top of  my default.py

session.flash=response.flash

Could be it ?

On 28 September 2015 at 01:29, Anthony <abas...@gmail.com> wrote:

No, that code shouldn't set session.flash nor write to the session.

On Sunday, September 27, 2015 at 5:51:50 PM UTC-4, icodk wrote:

I got these two lines in my model

session.connect(request, response, separate=True)

user_timezone = session.plugin_timezone_tz or 'UTC'

Could this be a reason ?

On 27 September 2015 at 21:50, Anthony wrote:

<Storage {'flash': ''}>

Something is setting session.flash. Does any Auth code run during these requests, or is there any form processing with a redirect?

Anthony



On Sunday, September 27, 2015 at 2:51:49 PM UTC-4, icodk wrote:

I just deleted the  session.forget() and very quickly got a lot of sessions with about 47 bytes

I attached one but I can't make sens of what inside