I was working on a barcode image generate system and make pdf for printing.
Here is my view.py
from reportlab.pdfgen import canvas
from reportlab.lib.units import inch, cm
from reportlab.platypus import Paragraph
canvas.Canvas('assets/pdf_print/'+barCode+'.pdf')
c.drawImage('1.png',0.9*cm,0,3.5*cm,1.8*cm)
c.drawImage('1.png',4.8*cm,0,3.5*cm,1.8*cm)
c.drawImage('1.png',8.9*cm,0,3.5*cm,1.8*cm)
c.drawImage('1.png',12.7*cm,0,3.5*cm,1.8*cm)
c.drawImage('1.png',16.7*cm,0,3.5*cm,1.8*cm)
c.showPage()
c.save()
I save that pdf file in this path successfully using report lab
assets/pdf_print/
After saving that file in that path, I need to generate a popup download for this file.
How could I do that in Django?
just create a href link the pop with link of view which returns PDF file as response
when the user clicks on that link the browser will prompt to save the file since it is a file response
from django.http import FileResponse, Http404
def pdf_view(request):
try:
return FileResponse(open('foobar.pdf', 'rb'), content_type='application/pdf')
except FileNotFoundError:
raise Http404()
Related
I have a view that create two csv and my goal is to zip them and add to a model.FileField
zip = zipfile.ZipFile('myzip.zip','w')
zip.writestr('file1.csv', file1.getvalue())
zip.writestr('file2.csv', file2.getvalue())
I have tried this, the zip is upload but when I download it I have the error 'the archive is damaged or unknown format'
Mymodel.objects.create(zip = File(open('myzip.zip','rb'))
This example just worked for me,
from django.core.files import File
from django.http import HttpResponse
from .models import ZipFile
import zipfile
from django.views import View
class ZipWriteView(View):
def get(self, request, *args, **kwargs):
with zipfile.ZipFile("myzip.zip", "w") as zip_obj:
zip_obj.write("polls/views.py") # add file 1
zip_obj.write("polls/admin.py") # add file 2
with open(zip_obj.filename, "rb") as f:
ZipFile.objects.create(file=File(f))
return HttpResponse("Done")
I am trying to read csv file in django but I don't know how to achieve it. I am fresher recently joined organization and working singly, please any one help me
from django.shortcuts import render
from django.http import HttpResponse
import csv
from csv import reader
def fun(request):
with open(r"C:\Users\Sagar\Downloads\ULB_Sp_ThreePhaseUpdate.csv") as file:
reader = csv.reader(file)
ip = request.GET["id"]
flag = False
for rec in reader:
if rec[1]=="id":
return HttpResponse("MID: ",rec[2])
return render(request, "index.html")
I am fairly new to Django and my project requires me to prompt user to open a pdf upon clicking a link. I already have the pdf file on my local machine and dont want to recreate it using Reportlab. Is there any way to do it?
I tried
with open("/user/some/directory/somefilename.pdf") as pdf:
response = HttpResponse(pdf, content_type='application/pdf')
response['Content-Disposition'] = 'attachment; filename="somefilename.pdf"'
return response
but it returned 404 page not found as the requested url wasn't in the URLconf of myproject.urls
What am I missing?
In general, when user click "Download", you can:
- If file is not existed:
- Generate pdf file use ReportLab as you did.
- Store generated file to a public dir.
return HttpResponseRedirect(file_url_to_public_dir)
The way that worked for me is by using FileSystemStorage
from django.core.files.storage import FileSystemStorage
from django.http import HttpResponse
fs = FileSystemStorage("/Users/location/where/file/is_saved/")
with fs.open("somefile.pdf") as pdf:
response = HttpResponse(pdf, content_type='application/pdf')
response['Content-Disposition'] = 'attachment; filename="my_pdf.pdf"'
return response
and now its prompting the user to save the file as it normally would!
I am trying to show/read pdfs from server , but getting erros. Below I have attached my view.py . Please help me to solve it
views.py
from django.shortcuts import render
from django.http import HttpResponse
from .models import PDF
def pdf_view(request):
a = PDF.objects.get(id=id)
with open('a.pdf', 'rb') as pdf:
response = HttpResponse(pdf.read(), contenttype='application/pdf')
response['Content-Disposition'] = 'filename=a.pdf'
return response
pdf.closed
you can use use Django templates to show/read pdf on sever. create 'templates' folder inside your django project. inside it create a html file which contain link of you pdf.
I have pisa producing .pdfs in django in the browser fine, but what if I want to automatically write the file to disk? What I want to do is to be able to generate a .pdf version file at specified points in time and save it in a uploads directory, so there is no browser interaction. Is this possible?
Yes it is possible. for example, using code from Greg Newman as a starter:
from django.template.loader import get_template
from django.template import Context
import ho.pisa as pisa
import cStringIO as StringIO
import cgi
def write_pdf(template_src, context_dict, filename):
template = get_template(template_src)
context = Context(context_dict)
html = template.render(context)
result = open(filename, 'wb') # Changed from file to filename
pdf = pisa.pisaDocument(StringIO.StringIO(
html.encode("UTF-8")), result)
result.close()
You just need to call write_pdf with a template, data in a dict and a file name.