I am trying to output PDF on Django using the Weasyprint library, but the images don't appear on the generated PDF. I have tried both relative and static URLs for the images, but even the static URL doesn't show the image. When opening the HTML itself on chrome, the images do show.
Here is my pdf generation view in the views.py file:
def pdf_generation(request, some_slug)
stud = Student.objects.get(some_slug=some_slug)
studid = stud.some_slug
context = {'studid':studid}
html_string = render_to_string('templates/pdf_gen.html', context)
html = HTML(string=html_string)
pdf = html.write_pdf(stylesheets=[CSS(settings.STATIC_ROOT + '/css/detail_pdf_gen.css')]);
response = HttpResponse(pdf, content_type='application/pdf')
response['Content-Disposition'] = 'inline; filename="mypdf.pdf"'
return response
Here is the part of the HTML of the image:
<DIV id="p1dimg1">
<IMG src="{% static 'img/image.jpg' %}" alt="">
</DIV>
And the CSS:
#page_1 #p1dimg1 {position:absolute;top:0px;left:0px;z-
index:-1;width:792px;height:1111px;}
#page_1 #p1dimg1 #p1img1 {width:792px;height:1111px;}
Thank you very much
Fixed by:
Add base_url=request.build_absolute_uri() so that
html = HTML(string=html_string)
becomes
html = HTML(string=html_string, base_url=request.build_absolute_uri())
That will allow for relative URLs in the HTML file.
For the images, only PNG images seems to work for some reason.
For the HTML styles to show on the PDF, add presentational_hints=True as per the Weasyprint docs:
pdf = html.write_pdf(stylesheets=[CSS(settings.STATIC_ROOT + '/css/detail_pdf_gen.css')], presentational_hints=True);
Setup static for the path of your image as:
{% load static %}
<img src="{% static 'images/your_image.png %}" alt="" />
and then you have to pass the base_url in HTML class of Weasyprint as:
HTML(string=html_string, base_url=request.build_absolute_uri())
After adding HTML(string=html_string, base_url=request.build_absolute_uri()) to my config images were still not loading. Had to use below logging to identify real issue.
import logging
logger = logging.getLogger('weasyprint')
logger.addHandler(logging.FileHandler('/tmp/weasyprint.log'))
Then check /tmp/weasyprint.log log file for errors.
Real issue for me was:
urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed certificate
Fix was to disable ssl verification:
import ssl
ssl._create_default_https_context = ssl._create_unverified_context