django - pisa : adding images to PDF output
I'm using a standard example from the web (http://www.20seven.org/journal/2008/11/pdf-generation-with-pisa-in-django.html) to convert a django 开发者_Python百科view / template into a PDF.
Is there an "easy" way to include images (either from a url or a reference on the server) in the template so they will show on the PDF?
I got the images working. the code is as follows:
from django.http import HttpResponse
from django.template.loader import render_to_string
from django.template import RequestContext
from django.conf import settings
import ho.pisa as pisa
import cStringIO as StringIO
import cgi
import os
def dm_monthly(request, year, month):
html = render_to_string('reports/dmmonthly.html', { 'pagesize' : 'A4', }, context_instance=RequestContext(request))
result = StringIO.StringIO()
pdf = pisa.pisaDocument(StringIO.StringIO(html.encode("UTF-8")), dest=result, link_callback=fetch_resources )
if not pdf.err:
return HttpResponse(result.getvalue(), mimetype='application/pdf')
return HttpResponse('Gremlins ate your pdf! %s' % cgi.escape(html))
def fetch_resources(uri, rel):
path = os.path.join(settings.MEDIA_ROOT, uri.replace(settings.MEDIA_URL, ""))
return path
This was taken liberally from http://groups.google.com/group/xhtml2pdf/browse_thread/thread/4cf4e5e0f4c99f55
Following line of code in HTML and Django version=2.0 works for me.
<img src="{{company.logo.path}}" height="100px">
I could not get images to appear despite trying every solution I could find on google. But this fudge worked for me as the command line version of pisa displays images ok:
from tempfile import mkstemp
# write html to a temporary file
# can used NamedTemporaryFile if using python 2.6+
fid, fname = mkstemp(dir='/tmp')
f = open(fname, 'w+b')
f.write(html)
f.close()
# now create pdf from the html
cmd = 'xhtml2pdf "%s"' % fname
os.system(cmd)
os.unlink(fname)
# get the content of the pdf
filename = fname+'.pdf'
pdf = open(filename, 'r')
content = pdf.read()
pdf.close()
os.unlink(pdf.name)
# return content
response = HttpResponse(content, mimetype='application/pdf')
response['Content-Disposition'] = 'attachment; filename=draft.pdf'
This worked where the images had either a url or the full path name, eg.
<img src="/home/django/project/site_media/css/output/images/logo.jpg" />
<img src="http://www.mysite.com/css/output/images/logo.jpg" />
def render_to_pdf( template_src, context_dict):
template = get_template(template_src)
context = Context(context_dict)
html = template.render(context)
result = StringIO.StringIO()
if page has an image.something:
pdf = pisa.pisaDocument(StringIO.StringIO(html.encode("UTF-8")), dest=result, link_callback=fetch_resources)
else no image.something :
pdf = pisa.pisaDocument(StringIO.StringIO(html.encode("UTF-8")),result)
if not pdf.err:
return HttpResponse(result.getvalue(), mimetype='examination_report/pdf')
return HttpResponse('We had some errors<pre>%s</pre>' % escape(html))
def fetch_resources(uri, rel):
if os.sep == '\\': # deal with windows and wrong slashes
uri2 = os.sep.join(uri.split('/'))
else:# else, just add the untouched path.
uri2 = uri
path = '%s%s' % (settings.SITE_ROOT, uri2)
return path
All the above code did not worked for me. In the end i got it working by putting the get_full_path procedure. So the final code looks like this
def render_to_pdf( template_src, context_dict):
now = datetime.now()
filename = now.strftime('%Y-%m-%d') + '.pdf'
template = get_template(template_src)
context = Context(context_dict)
html = template.render(context)
result = StringIO.StringIO()
pdf = pisa.pisaDocument(StringIO.StringIO(html.encode("UTF-8")),result, path=path)
if not pdf.err:
response = HttpResponse(result.getvalue(), mimetype='application/pdf')
response['Content-Disposition'] = 'attachment; filename="'+filename+'"'
return response
return HttpResponse('We had some errors<pre>%s</pre>' % escape(html))
def get_full_path_x(request):
full_path = ('http', ('', 's')[request.is_secure()], '://',
request.META['HTTP_HOST'], request.path)
return ''.join(full_path)
You can convert the image to base64 too.
http://www.motobit.com/util/base64-decoder-encoder.asp
Converting to base64 you will never have problems with image links.
You could always add the images afterwards with IText/ISharp.
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