Re: Downloading html as pdf using popen, headless chrome option

Check whether FileResponse instead of StreamingHttpResponse helps to solve the issue , https://docs.djangoproject.com/en/4.0/ref/request-response/#fileresponse-objects

On Tue, Feb 1, 2022 at 11:26 PM Aadil Rashid <aadil10121998@gmail.com> wrote:

I am trying to generating pdf from webpages, using popen , but when i call this

view it generates UnicodeDecodeError: 'utf-8' codec can't decode byte 0xd3 in position 10: invalid continuation byte

This is my view

from projName.settings import BASE_DIR

from subprocess import Popen, PIPE, STDOUT

from wsgiref.util import FileWrapper

from django.http import StreamingHttpResponse

class DownloadAsPDF(View):

def post(self, request, *args, **kwargs):

base = str(BASE_DIR)

file_name = str( base + '/testreport.pdf')

post_url = request.POST.get("page_url")

url = str('http://' + request.get_host() + post_url)

chrome_args = ['/path/google-chrome', '--headless', '--virtual-time-buget=20000',

'--print-to-pdf=/path/testreport.pdf', url]

external_process = Popen(chrome_args, stdout=PIPE, stderr=STDOUT)

external_process.wait()

return_file = FileWrapper(open('{}'.format(file_name), 'r'))

download_file_name = 'report'

response = StreamingHttpResponse(return_file, content_type='application/force-download')

response['Content-Disposition'] = f'attachment; filename= {download_file_name}.pdf'

return response

Can please anybody, tell me why is it generating this error and what is the possible solution

this problem, Thanks you very much

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Jisson Varghese

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