diagrams for Trac request processing

[anatoly techtonik <techtonik@…>]

As a potential plugin developer, I would really appreciate the diagram with the order of various components called when Trac processes request.

For example, to answer the question, that consequences has null Exception handler in this plugin:

​http://trac-hacks.org/browser/noanonymousplugin/0.11/noanonymous/filter.py?rev=4369

[Christian Boos]

Well, nobody really knows what happens …

[Carsten Klein <carsten.klein@…>]

General Trac Request Handling

[Carsten Klein <carsten.klein@…>]

See the attached file. It displays general trac request handling. Of course, there is a lot more going on during request dispatch, especially when it comes to the actual request handler in charge for processing the request.

I forgot to also have the owners displayed for each of the actors, however, these are basically all from the trac.web.main and trac.web.api and trac.web.chrome modules.

[Carsten Klein <carsten.klein@…>]

Regarding your question towards the noanonymous filter plugin. It is implemented in the wrong way. all of the code should go to pre_process_request, basically making it

   def pre_process_request(req, ...):

     if req.authenticate() == 'anonymous' and \
        not req.pathinfo.startswith("/login") and \
        not req.pathinfo.startswith("/resetpassword"):
        req.redirect(req.href.login())

[Carsten Klein <carsten.klein@…>]

ups it is of course req.authname instead of req.authenticate()

[Christian Boos]

Thanks Carsten. Could you stick that diagram somewhere in an appropriate TracDev page (if none is fitting you can of course create a new one).

[anatoly techtonik <techtonik@…>]

I second to thank you, Carsten. Very insightful. Now it is my problem to find some time to integrate this knowledge into NoAnonymous practices. =)

[anatoly techtonik <techtonik@…>]

Replying to cboos:

Could you stick that diagram somewhere in an appropriate TracDev page.

I believe it is already done 7 weeks ago at TracDev/RequestHandling

[anatoly techtonik <techtonik@…>]

Replying to Carsten Klein <carsten.klein@…>:

ups it is of course req.authname instead of req.authenticate()

Actually I've implemented new version of the plugin as you recommended about the same time the ticket was created. The previous link was to old version, because of questionable exception handler. New version is here - ​http://trac-hacks.org/browser/noanonymousplugin/0.11/noanonymous/filter.py

It seems that the diagram can be broken into two for better screen alignment. One for project index request and one for the generic request. If there could be a source file for some sequence diagram tool like ​sdedit people could use it to improve the diagram.

Perhaps requests for static resources can also be presented as more detailed example.

[carsten.klein@…]

The diagram was made using MagicDrawUML. I will split the diagram into two distinct sequence diagrams, one for the project index and one for the generic request and post these here, incl. the MagicDrawUML file.

[Carsten Klein <carsten.klein@…>]

I have update the wiki page and the diagrams there. Also included the original UML file (MagicDrawUML).

See TracDev/RequestHandling for more information.

Please note that some of the attachments there can be removed.

[Thijs Triemstra <lists@…>]

Guess this ticket can be closed then.

[anatoly techtonik <techtonik@…>]

Thanks.