HI Mic!
This is fantastic! Thanks for the info! :)
On Aug 17, 6:33 pm, Michele Comitini <michele.comit...@gmail.com>
wrote:
> Hi Mart!
>
> Copy sample code in my previous mail.
>
> to test quicly you cat put the view code somewhere in
> /welcome/views/default/index.html
>
> {{=A(T('be brave!'), _onclick="ajax('%s',[],':eval');" %
> URL('gen_pdf'), _class='button')}}
>
> copy the function gen_pdf() in /welcome/controllers/default.py
>
> def gen_pdf():
> from gluon.contrib.pyfpdf import FPDF
>
> pdf=FPDF()
> pdf.add_page()
> pdf.set_font('Arial','B',16)
> pdf.cell(40,10,'Hello World at %s!' % request.now)
> doc=pdf.output(dest='S')
>
> doc64=embed64(data=doc,extension='application/pdf')
>
> return 'window.location="%s";' % doc64
>
> No need for other code. The trick is all in the use of 'data:' URI
> that is created by embed64()
>
> ok now URL('gen_pdf()') calls gen_pdf() in the controller that
> generates the pdf on the fly and posts it back to the browser.
> All in one pass, no session no temporary files around, no form, no GET...
>
> ;-)
>
> mic
>
> 2011/8/16 mart <msenecal...@gmail.com>:
>
>
>
>
>
>
>
> > Hi Mic!
>
> > This is very interesting! :) how does it work? you have
> > "URL('gen_pdf')", what is that referencing?
>
> > would you have a model/sample app that we could peek at? :)
>
> > Thanks,
> > Mart :)
>
> > On Aug 15, 4:47 pm, Michele Comitini <michele.comit...@gmail.com>
> > wrote:
> >> Suppose you want to make an AJAX call that starts a file download.
> >> How can you do that?
> >> 1. form submission
> >> 2. a element href
> >> 3. iframe
>
> >> Too complex!
>
> >> of course *web2py* comes to rescue...
> >> BIG NOTE: the following is based on 'data:' url type and was tested
> >> only on FF and chrome. I do not have
> >> IE but I suppose that is not compatible with the standard!
>
> >> In your view put a web2py ajax call similar to the following wherever
> >> you need it:
>
> >> ajax('%s',[],':eval');" % URL('gen_pdf')
>
> >> ex.
>
> >> {{=A(T('be brave!'), _onclick="ajax('%s',[],':eval');" %
> >> URL('gen_pdf'), _class='button')}}
>
> >> in the controller use embed64.
>
> >> def gen_pdf():
> >> from gluon.contrib.pyfpdf import FPDF
>
> >> pdf=FPDF()
> >> pdf.add_page()
> >> pdf.set_font('Arial','B',16)
> >> pdf.cell(40,10,'Hello World at %s!' % request.now)
> >> doc=pdf.output(dest='S')
>
> >> doc64=embed64(data=doc,extension='application/pdf')
>
> >> return 'window.location="%s";' % doc64
>
> >> have fun!
>
> >> mic
