so we did it...
import pylons
from pylons.controllers.util import Response
response_options = config['pylons.response_options']
request_counter = 1
while request_counter <= MAX_REQUEST_TRIES:
try:
pylons_obj = environ['pylons.pylons']
registry = environ['paste.registry']
pylons_obj.response =
Response(content_type=response_options['content_type'],
charset=response_options['charset'])
pylons_obj.response.headers.update(response_options['headers'])
registry.register(pylons.response, pylons_obj.response)
transaction_filter.start()
result = WSGIController.__call__(self, environ, start_response)
transaction_filter.commit()
return result
except:
pass...
On Tue, Oct 19, 2010 at 3:25 PM, Tomasz Nazar <[email protected]> wrote:
> Hello there!
> I got this neat idea, and I'm not sure if it is supposed to work...
>
> Quick (if you're not interested in the full scenario)
> Is it possible to invoke: WSGIController.__call__(self, environ,
> start_response) many times during 1 http request to Pylons?
>
>
> A bit longer description:
> My user scenario is:
> Browser/user sends request --->
> 1* server receives and calls some Controller
> 1* WSGIController.__call__(self, environ, start_response) is
> being invoked, which..
> 1* raises some Exception (database deadlock)
> <-- error middleware catches exception, and redirects error page
> user gets error page -->
>
> Above is normal situation. I'd like to improve it, so that server
> itself tries to handle db exception by restarting the request and
> _maybe_ next time DB will unlock tables, so that
> still-the-same-request can be processed without an error to the user.
>
> So here is what I do:
>
> Browser/user sends request --->
> * server receives and calls some Controller
> 1* WSGIController.__call__(self, environ, start_response) is
> being invoked, which..
> 1* raises some Exception (database deadlock)
> 2* I catch the exception and run again:
> WSGIController.__call__(self, environ, start_response)
> 2* still raises some Exception (database deadlock)
> 3* I catch the exception and run again:
> WSGIController.__call__(self, environ, start_response)
> * db is now unlocked and requests completes
> <-- some Mako page is returned to a user
> user SHOULD gets some success page -->
>
>
> What happens is that returned value from __call__(..) is not quite
> HTML string. Rather, it's a concatenation of final HTML with the same
> HTML page with tags escaped...
> So instead of str("<html>Hello</html>")
> I get str("<html>Hello</html><html>Hello</html>") which is
> wrong...
>
> Should I call sth else before calling __call__ again()
> Will it work, can it be done?
>
> Thanks for any response
>
> T.
>
>
>
> --
> _i______'simplicity_is_the_key'__________tomasz_nazar
> _ii____'i_am_concern_oriented'________________JKM-UPR
> _iii__'patsystem.sf.net'___________________linux_user
> _'aspectized.com'___________________________prevayler
>
--
_i______'simplicity_is_the_key'__________tomasz_nazar
_ii____'i_am_concern_oriented'________________JKM-UPR
_iii__'patsystem.sf.net'___________________linux_user
_'aspectized.com'___________________________prevayler
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