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 <[email protected]>:
> 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 <[email protected]>
> 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
