Hi Cedric, You just have to include your package from Pyramid main configuration file, using the "includes" section... The "includeme" function will then be called automatically to register your tween!
Thierry -- https://www.ulthar.net -- http://pyams.readthedocs.io Le ven. 8 janv. 2021 à 12:06, C J <work.cedricjos...@gmail.com> a écrit : > I fixed my code by returning the function inside. But I still need to > understand where to call theses functions to set everything up. > > def maintenance_tween_factory(handler, registry): > # Return a tween callable. > # 'handler' is the next tween or the WSGI application. > # Deployment settings are in 'registry.settings'. > def maintenance_tween(handler, request): > is_maintenance_mode = request.registry.settings["in_maintenance"] > if is_maintenance_mode and not "dbmigration" in request.matchdict: # > Could limit it to certain request.path's. > # Return an error response, bypassing the application. > return pyramid.response.HTTPServiceUnavailable( > { > "Maintenance": "Please note that we will be performing important server > maintenance in a few minutes, during which time the server will be > unavailable. If you are in the middle of something important, please save > your work or hold off on any critical actions until we are finished." > } > ) > else: > # Call next tween/application and return its response unchanged. > return handler(request) > return maintenance_tween > Le vendredi 8 janvier 2021 à 11:36:52 UTC+1, C J a écrit : > >> To everybody: thanks a lot for your answers. Sorry for the delay: I am >> living in France. >> Bay the way I am still interested in the Pyramid CMS solution steps. >> >> Mike, >> I have created a file named maintenance.py in my utils module. >> It contains: >> >> import pyramid >> >> def includeme(config): >> # Calculate the dotted name of the factory function. >> # E.g., "myapp.lib.mytween.my_tween_factory". >> maintenance_tween = __name__ + ".maintenance_tween_factory" >> config.add_tween(maintenance_tween) >> # You can wrap app this in an 'if' to conditionally enable it; e.g., >> # ``if pyramid.settings.asbool(config.registry.settings.get("myoption", >> True))`` >> >> >> def maintenance_tween_factory(handler, registry): >> # Return a tween callable. >> # 'handler' is the next tween or the WSGI application. >> # Deployment settings are in 'registry.settings'. >> def my_tween(handler, request): >> is_maintenance_mode = request.registry.settings["in_maintenance"] >> if is_maintenance_mode and not "dbmigration" in request.matchdict: # >> Could limit it to certain request.path's. >> # Return an error response, bypassing the application. >> return pyramid.response.HTTPServiceUnavailable( >> { >> "Maintenance": "Please note that we will be performing >> important server maintenance in a few minutes, during which time the server >> will be unavailable. If you are in the middle of something important, >> please save your work or hold off on any critical actions >> until we are finished." >> } >> ) >> else: >> # Call next tween/application and return its response unchanged. >> return handler(request) >> return maintenance_tween >> >> I have also added *in_maintenance = True* in my production.ini >> file. >> >> >> - Now where should I import this modules? Where should I call these >> functions? >> - Another point is that *maintenance_tween * is unknow in th context >> of def maintenance_tween_factory(handler, registry) so will >> *return maintenance_tween* work? >> - Also I want a Cornice API (dbmigration) which is in my views module >> to still be available in production when I send a POST request or a GET >> request to /dbmigration during the maintenance time. >> >> I have read >> https://pyramid.readthedocs.io/en/latest/narr/hooks.html#registering-tweens >> But I do not understand very well where to write and call the tweens >> lines of code. >> >> >> Le vendredi 8 janvier 2021 à 07:47:18 UTC+1, Mike Orr a écrit : >> >>> I forgot the last line. The end of 'my_tween_factory' needs to 'return >>> my_tween'. >>> >>> On Thu, Jan 7, 2021 at 7:05 PM Mike Orr <slugg...@gmail.com> wrote: >>> >>>> I have a request-logging tween in only a page of code. It's >>>> straightforward to write from the documentation. >>>> >>>> >>>> https://pyramid.readthedocs.io/en/latest/narr/hooks.html#registering-tweens >>>> >>>> I adapted the code for your use case (untested). Your module would have >>>> something like this: >>>> >>>> # Module 'myapp.lib.mytween' >>>> >>>> def includeme(config): >>>> # Calculate the dotted name of the factory function. >>>> # E.g., "myapp.lib.mytween.my_tween_factory". >>>> factory_name = __name__ + ".my_tween_factory" >>>> config.add_tween(factory_name) >>>> # You can wrap app this in an 'if' to conditionally enable it; e.g., >>>> # ``if >>>> pyramid.settings.asbool(config.registry.settings.get("myoption", True))`` >>>> >>>> def my_tween_factory(handler, registry): >>>> # Return a tween callable. >>>> # 'handler' is the next tween or the WSGI application. >>>> # Deployment settings are in 'registry.settings'. >>>> def my_tween(handler, request): >>>> if is_maintenance_mode: # Could limit it to certain >>>> request.path's. >>>> # Return an error response, bypassing the application. >>>> return >>>> pyramid.response.HTTPServiceUnavailable(maintenance_message) >>>> else: >>>> # Call next tween/application and return its response >>>> unchanged. >>>> return handler(request) >>>> >>>> Then list your module in 'pyramid.includes' in the config file. E.g., >>>> "myapp.lib.mytween". >>>> >>>> That 'if is_maintenance_mode' condition could check whether a specified >>>> file exists. The file path could be in a config setting. >>>> >>>> On Thu, Jan 7, 2021 at 3:32 PM C J <work.ced...@gmail.com> wrote: >>>> >>>>> >>>>> That's really interesting Thierry. Can you please show me how to do? >>>>> I have tried to use tweens. I tried many things starting with >>>>> *pyramid.tweens = pyramid_maintenance.tween_maintenance *and modifying >>>>> the *__init__.py* file, however, I do not understand what they are >>>>> and how to use them despite hours spent reading the Pyramid >>>>> documentation and different articles. >>>>> Being working on a website that is already in production I also wonder >>>>> how I would be able to implement your solution based on an external CMS. >>>>> >>>>> >>>>> [image: Mailtrack] >>>>> <https://mailtrack.io?utm_source=gmail&utm_medium=signature&utm_campaign=signaturevirality5&;> >>>>> Sender >>>>> notified by >>>>> Mailtrack >>>>> <https://mailtrack.io?utm_source=gmail&utm_medium=signature&utm_campaign=signaturevirality5&;> >>>>> 07/01/21 >>>>> à 21:59:31 >>>>> >>>>> On Thu, Jan 7, 2021 at 9:22 PM Thierry Florac <tfl...@gmail.com> >>>>> wrote: >>>>> >>>>>> I've built a custom Pyramid tween to handle this and redirect >>>>>> requests while application is up! >>>>>> It can handle redirects (based on regular expressions) before or >>>>>> after the request is handled by Pyramid application, to be able to set >>>>>> the >>>>>> site in "maintenance mode", or to handle custom redirects in case of >>>>>> NotFound exceptions... >>>>>> All configuration is done through our Pyramid CMS. >>>>>> >>>>>> Best regards, >>>>>> Thierry >>>>>> -- >>>>>> https://www.ulthar.net -- http://pyams.readthedocs.io >>>>>> >>>>>> >>>>>> Le jeu. 7 janv. 2021 à 18:43, 'Jonathan Vanasco' via pylons-discuss < >>>>>> pylons-...@googlegroups.com> a écrit : >>>>>> >>>>>>> I typically handle this on nginx which sites in front of Pyramid. >>>>>>> if you wanted to do everything in python, you could probably use WSGI >>>>>>> middleware to route to a separate maintenance application or html file. >>>>>>> >>>>>>> On Thursday, January 7, 2021 at 10:09:34 AM UTC-5 C J wrote: >>>>>>> >>>>>>>> Hi everybody, >>>>>>>> >>>>>>>> I am looking for an easy way to temporarily redirect all the users >>>>>>>> of my pyramid website to a maintenance vue without having to >>>>>>>> comment/delete, etc my routes. >>>>>>>> I would like to make it easy to re-activate the others routes when >>>>>>>> the maintenance is done. >>>>>>>> I found this : >>>>>>>> https://pypi.org/project/pyramid_maintenance/ >>>>>>>> but I always get : >>>>>>>> >>>>>>>> in renderer >>>>>>>> raise ValueError('No such renderer factory %s' % str(self.type)) >>>>>>>> ValueError: No such renderer factory .jinja2" >>>>>>>> >>>>>>>> with my browser displaying : >>>>>>>> "Internal Server Error The server encountered an unexpected >>>>>>>> internal server error (generated by waitress)" >>>>>>>> >>>>>>>> I am new to Pyramid so please give me the necessary details step by >>>>>>>> step. >>>>>>>> >>>>>>>> Best regards. >>>>>>>> Cedric J. >>>>>>>> >>>>>>> -- >>>>>>> You received this message because you are subscribed to the Google >>>>>>> Groups "pylons-discuss" group. >>>>>>> To unsubscribe from this group and stop receiving emails from it, >>>>>>> send an email to pylons-discus...@googlegroups.com. >>>>>>> To view this discussion on the web visit >>>>>>> https://groups.google.com/d/msgid/pylons-discuss/98a779a5-5bcc-4971-a271-a202cc49f732n%40googlegroups.com >>>>>>> <https://groups.google.com/d/msgid/pylons-discuss/98a779a5-5bcc-4971-a271-a202cc49f732n%40googlegroups.com?utm_medium=email&utm_source=footer> >>>>>>> . >>>>>>> >>>>>> -- >>>>>> You received this message because you are subscribed to a topic in >>>>>> the Google Groups "pylons-discuss" group. >>>>>> To unsubscribe from this topic, visit >>>>>> https://groups.google.com/d/topic/pylons-discuss/jKTnofibd00/unsubscribe >>>>>> . >>>>>> To unsubscribe from this group and all its topics, send an email to >>>>>> pylons-discus...@googlegroups.com. >>>>>> To view this discussion on the web visit >>>>>> https://groups.google.com/d/msgid/pylons-discuss/CAPX_VWBO5j0im6r0RRKEf%3D%3DzXyx5y_Qp%3DUJ5bntEGQtdiDejKQ%40mail.gmail.com >>>>>> <https://groups.google.com/d/msgid/pylons-discuss/CAPX_VWBO5j0im6r0RRKEf%3D%3DzXyx5y_Qp%3DUJ5bntEGQtdiDejKQ%40mail.gmail.com?utm_medium=email&utm_source=footer> >>>>>> . >>>>>> >>>>> -- >>>>> You received this message because you are subscribed to the Google >>>>> Groups "pylons-discuss" group. >>>>> To unsubscribe from this group and stop receiving emails from it, send >>>>> an email to pylons-discus...@googlegroups.com. >>>>> To view this discussion on the web visit >>>>> https://groups.google.com/d/msgid/pylons-discuss/CAJgq6FJC11OfFNbfhhPwfMKRJsJfpd2UpWUDs5SAm5hKaMWpzA%40mail.gmail.com >>>>> <https://groups.google.com/d/msgid/pylons-discuss/CAJgq6FJC11OfFNbfhhPwfMKRJsJfpd2UpWUDs5SAm5hKaMWpzA%40mail.gmail.com?utm_medium=email&utm_source=footer> >>>>> . >>>>> >>>> >>>> >>>> -- >>>> Mike Orr <slugg...@gmail.com> >>>> >>> >>> >>> -- >>> Mike Orr <slugg...@gmail.com> >>> >> -- > You received this message because you are subscribed to the Google Groups > "pylons-discuss" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to pylons-discuss+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/pylons-discuss/e72f1fc0-a202-4244-8e57-576053b68ce2n%40googlegroups.com > <https://groups.google.com/d/msgid/pylons-discuss/e72f1fc0-a202-4244-8e57-576053b68ce2n%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "pylons-discuss" group. To unsubscribe from this group and stop receiving emails from it, send an email to pylons-discuss+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/pylons-discuss/CAPX_VWARWr5REbBcmGUOPG6C%3DtvhbRi8BOQKmBWG0q8AGTjvuA%40mail.gmail.com.
