Thank you for your response, I tried as suggested, but did not succeed.
[...]
from io import BytesIO
[...]
response.headers["Content-Type"]=contenttype(".pdf") # version 1
#response.headers["Content-Type"]=contenttype("application/pdf") #
version 2
#response.headers["Content-Type"]=contenttype("application/pdf;
charset=latin1") # version 3
response.headers['Content-disposition'] = 'attachment;
filename=mypdf.pdf'
return BytesIO(pdf.output(dest='S')).getvalue()
I tried the 3 versions of the 'content-type' and the response with BytesIO
Meanwhile I found a solution with storing an intermediate pdf-file locally
on the server and serve it.
Anyway - it would be interesting to get a 'direct' solution.
Thanks for your help!
Am Mittwoch, 1. Juli 2020 07:13:09 UTC+2 schrieb Massimo Di Pierro:
>
> Try a few things things:
>
>
> 1) set content type to "application/*pdf"*
> 2) set content type to "application/*pdf**; charset=latin1"*
>
> *3) *
>
> *from io import BytesIOreturn BytesIO(pdf.output(dest='S'))*
>
> On Monday, 20 April 2020 22:28:19 UTC-7, Armin Würtenberger wrote:
>>
>> Hi,
>>
>> I am developing apps which are heavily depending on the creation of
>> pdf-files. This workes great using fpfdf and python2.7. I try to go on and
>> moving to pyhton3.7 which is, so far no problem. The real challenge for me
>> is to generate correct pdf-files:
>>
>> Heres how I did it in python2.7:
>>
>>
>> @service.run
>> def generatePDF(**kwargs):
>> from gluon.contrib.fpdf import fpdf
>> from gluon.contrib.fpdf.php import UTF8ToUTF16BE, UTF8StringToArray
>> from gluon.contenttype import contenttype
>>
>> pdf = fpdf.FPDF("P","mm","a4")
>> pdf.l_margin, pdf.r_margin = 20, 10
>> pdf.add_font('Sans', '', 'DejaVuSansCondensed.ttf', uni=True)
>> pdf.add_font('Sans', 'B', 'DejaVuSansCondensed-Bold.ttf', uni=True)
>> pdf.add_font('Sans', 'I', 'DejaVuSansCondensed-Oblique.ttf', uni=True
>> )
>> pdf.add_font('Sans', 'BI', 'DejaVuSansCondensed-BoldOblique.ttf', uni
>> =True)
>> pdf.add_font('Serif', '', 'DejaVuSerifCondensed.ttf', uni=True)
>> pdf.add_font('Serif', 'B', 'DejaVuSerifCondensed-Bold.ttf', uni=True)
>> pdf.add_font('Serif', 'I', 'DejaVuSerifCondensed-Italic.ttf', uni=
>> True)
>> pdf.add_font('Serif', 'BI', 'DejaVuSerifCondensed-BoldItalic.ttf',
>> uni=True)
>>
>> pdf.add_page()
>> pdf.set_font('Sans','B',20)
>> pdf.set_y( 25 )
>> pdf.cell( w=pdf.w-(pdf.l_margin+pdf.r_margin), h=25,
>> align="C",
>> border=1,
>> txt="Hello World", ln=2 )
>>
>>
>> response.headers["Content-Type"]=contenttype(".pdf")
>> response.headers['Content-disposition'] = 'attachment;
>> filename=mypdf.pdf'
>>
>> return pdf.output(dest='S')
>>
>>
>> The downloaded file is a PDF, the file itself is latin1 encoded. (checked
>> with vim; set fileencoding)
>>
>> If I do the very same, using web2py and python3.7, I am getting the
>> pdf-file as byte-stream - starting with the b'
>>
>> b'%PDF-1.3\n3 0 obj\n<</Type /Page\n/Parent 1 0 R ...
>>
>>
>> fileencoding utf-8, which I understand (somehow) since the fpdf does
>> serve a byte-stream.
>>
>> To overcome this, I tried to change the last line to:
>>
>>
>> return pdf.output(dest='S').decode('latin1')
>>
>>
>> and I get a file which is no valid pdf, fileencoding is utf-8
>> Once I manually change the fileencoding of the downloaded file to latin1,
>> it becomes a valid and readable pdf-file.
>>
>> Using
>>
>> pdf.output("myfile.pdf",dest='F')
>>
>> does produce a valid, latin1 - encoded file on disc however.
>>
>> I tried different variants as well, but I got stuck and was not able to
>> produce a valid pdf.
>>
>> Can someone suggest a way to produce a valid download?
>> At first I was suspecting some missing response - header information, but
>> I did not find one which solved the problems.
>>
>> Any help would be appreciated!
>>
>> I am working on macOS, using Safari, but tried Firefox and Chrome as well
>> - same result.
>>
>> Cheers, Armin
>>
>
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