I am trying to implement a PDF converter as well, but have run into some
problems:
* after_render hooked functions only receive a literal with the rendered
result. Modifying this result/returning the modified version in the hooked
function does not change what is written to the response object.
* If you try writing directly to the response object, sometime after your
function returns, the entire original response is written to the response
object.
Is there a way to modify the response's content and headers in a function
hooked to after_render?
On Monday, September 19, 2011 10:38:32 AM UTC-4, Alessandro Molina wrote:
>
> you can use
> Decoration.get_decoration(controller_method).register_hook('after_render',
> callable)
> and callable will be execute after rendering the template with the
> rendering result as parameter.
>
> On Mon, Sep 19, 2011 at 3:32 PM, León Domingo <[email protected]>
> wrote:
> > Hi Alessandro,
> > And how would it be this way? I don't know exactly how "after_render"
> > has to be used. As far as I know, you define a function with a
> > "response" parameter and then a decorator "after_render" passing that
> > function in.
> >
> > def _after_render(r):
> > # something to be done
> > r.content_type = 'application/pdf'
> > r.body = to_pdf(r.body)
> >
> > @expose('foo.html')
> > @after_render(_after_render)
> > def foo(self, *args, **kwargs):
> > return dict(....)
> >
> > is it correct? I was trying this way but...can I modify "response"
> > inside "_after_render"? I thought it was not possible...
> >
> > Thanks
> >
> > León
> >
> > On 19 sep, 15:13, Alessandro Molina <[email protected]>
> > wrote:
> >> Uhm, I would suggest you to setup a after_render hook and decide if
> >> the render result must be converted to a PDF or not.
> >> In the case it doesn't have to be converted you can leave it go as
> >> HTML, otherwise you can call wkhtmltopdf
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >> On Sun, Sep 18, 2011 at 9:54 AM, León Domingo <[email protected]>
> wrote:
> >> > Hi,
> >> > I've created a little function that makes use of wkhtmltopdf (http://
> >> > code.google.com/p/wkhtmltopdf/) to get PDF content from HTML content.
> >>
> >> > I would like to use some controllers to get a PDF version of the HTML
> >> > content defined in the corresponding template.
> >>
> >> > @expose('foo.html')
> >> > def foo(self, *args, **kwargs):
> >> > return dict(....)
> >>
> >> > I've been making some experiments with a middleware class.
> >>
> >> > response.content_type = 'application/pdf'
> >> > response.body = to_pdf(response.body)
> >>
> >> > return response(environ, start_response)
> >>
> >> > It works but I need something to know if I have to make the
> >> > translation or not
> >>
> >> > if is_a_suitable_response:
> >> > response.content_type = 'application/pdf'
> >> > response.body = to_pdf(response.body)
> >>
> >> > return response(environ, start_response)
> >>
> >> > and I don't know how I can "mark" the response to do so. In the other
> >> > hand, I don't know if this is the right way to do that.
> >>
> >> > Thanks a lot
> >>
> >> > León
> >>
> >> > --
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