Generate Atom feed from tg?

[Adrian von Bidder]

Heyho!

For my tg 2 forum / blog type plaything: what's the best/easiest/recommended
way to generate an Atom feed?

The obvious way is writing a Genshi Atom template.  Is this also what you'd
recommend?

Also: how do I change the template to be used from within a controller
method?  (Sure this is covered in the docs, but I haven't found it by a
quick search, sorry.)

cheers
-- vbi

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[Daniel Fetchinson]

> Also: how do I change the template to be used from within a controller
> method?  (Sure this is covered in the docs, but I haven't found it by a
> quick search, sorry.)

This has been discussed recently:

http://groups.google.com/group/turbogears/browse_thread/thread/26af57fe95a617d5

HTH,
Daniel

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[Diez B. Roggisch]

On Wednesday 14 October 2009 18:00:17 Adrian von Bidder wrote:
> Heyho!
>
> For my tg 2 forum / blog type plaything: what's the
> best/easiest/recommended way to generate an Atom feed?
>
> The obvious way is writing a Genshi Atom template.  Is this also what you'd
> recommend?

We do it that way, yes. I think the hardest part is to format dates & know
which date is used for what... the rest is pretty simple.

> Also: how do I change the template to be used from within a controller
> method?  (Sure this is covered in the docs, but I haven't found it by a
> quick search, sorry.)

override_template

Diez

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[Christopher Arndt]

Diez B. Roggisch schrieb:
> On Wednesday 14 October 2009 18:00:17 Adrian von Bidder wrote:
>> The obvious way is writing a Genshi Atom template.  Is this also what you'd
>> recommend?
>
> We do it that way, yes. I think the hardest part is to format dates & know
> which date is used for what... the rest is pretty simple.


You could have a look at the Atom template from TurboFeeds:

http://trac.turbogears.org/browser/projects/TurboFeeds/trunk/turbofeeds/templates

Chris

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[Adrian von Bidder]

On Thursday 15 October 2009 13.58:11 Christopher Arndt wrote:
> Diez B. Roggisch schrieb:

> You could have a look at the Atom template from TurboFeeds:

Cool, thanks a lot!



cheers
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[Mike C. Fletcher-2]

Adrian von Bidder wrote:

> Heyho!
>
> For my tg 2 forum / blog type plaything: what's the best/easiest/recommended
> way to generate an Atom feed?
>
> The obvious way is writing a Genshi Atom template.  Is this also what you'd
> recommend?
>
> Also: how do I change the template to be used from within a controller
> method?  (Sure this is covered in the docs, but I haven't found it by a
> quick search, sorry.)
>  

The WebHelpers module provides a series of helper objects which generate
feeds in the various major formats.  I actually sat down to document the
"steal a genshi template from TurboFeeds" method into the documentation
(and got most of the way down that path) before I found the WebHelpers
documentation.  You can find the current docs in the "third party
modules" "webhelpers" section.  I've updated the 2.1 docs to be a little
less obtuse about this (i.e. to link it from the Working with TurboGears
section and make the title describe what it lets you do).

Here's the sample code from the updated docs:

    from helloworld.lib.base import BaseController
    from tg.controllers import CUSTOM_CONTENT_TYPE
    from webhelpers.feedgenerator import Atom1Feed
    from pylons import response
    from pylons.controllers.util import url_for
   
    class CommentsController(BaseController):

        @expose(content_type=CUSTOM_CONTENT_TYPE)
        def atom1( self ):
            """Produce an atom-1.0 feed via feedgenerator module"""
            feed = Atom1Feed(
                title=u"An excellent Sample Feed",
                link=url_for(),
                description=u"A sample feed, showing how to make and add
entries",
                language=u"en",
            )
            feed.add_item(title="Sample post",
                          link=u"http://example.com/posts/sample",
                          description="Testing.")
            response.content_type = 'application/atom+xml'
            return feed.writeString('utf-8')

HTH,
Mike

--
________________________________________________
  Mike C. Fletcher
  Designer, VR Plumber, Coder
  http://www.vrplumber.com
  http://blog.vrplumber.com


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[Adrian von Bidder]

On Thursday 05 November 2009 05.59:35 Mike C. Fletcher wrote:
> The WebHelpers module provides a series of helper objects which generate
> feeds in the various major formats.

Much appreciated, thanks for the hint and the docs enhancements!

I think this is the correct way forward as it certainly helps reducing
code/feature duplication.  Having (very similar / identical) genshi
templates for Atom feeds being used by every tg user (and never
updated/enhanced as the original version changes etc.) is not what FOSS is
about...

cheers
-- vbi

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