def run(self):
set_classes(self.options)
# FFS why so complex
svg = qrcode.make(self.arguments[0],
image_factory=qrcode.image.svg.SvgPathFillImage)
f = io.BytesIO()
svg.save(f)
svg = f.getvalue().decode('utf-8')
# Compress a bit, remove cruft
svg = svg.replace('L ', 'L').replace('M ', 'M').replace(' z', 'z')
svg = svg.replace(' id="qr-path"', '')
attribs = ' class="{}"'.format(
' '.join(['m-image'] + self.options.get('classes', [])))
if 'size' in self.options:
size = self.options['size']
else:
size = None
def preamble_repl(match):
return _svg_preamble_dst.format(
attribs=attribs,
size=size if size else
# The original size is in mm, convert that to pixels on 96 DPI
# and then to rem assuming 1 rem = 16px
'{:.2f}rem'.format(
float(match.group('width')) * 9.6 / 2.54 / 16.0, 2),
viewBox=match.group('viewBox'))
svg = _svg_preamble_src.sub(preamble_repl, svg)
return [nodes.raw('', svg, format='html')]
def run(self):
set_classes(self.options)
# FFS why so complex
svg = qrcode.make(self.arguments[0], image_factory=qrcode.image.svg.SvgPathFillImage)
f = io.BytesIO()
svg.save(f)
svg = f.getvalue().decode('utf-8')
# Compress a bit, remove cruft
svg = svg.replace('L ', 'L').replace('M ', 'M').replace(' z', 'z')
svg = svg.replace(' id="qr-path"', '')
attribs = ' class="{}"'.format(' '.join(['m-image'] + self.options.get('classes', [])))
if 'size' in self.options:
size = self.options['size']
else:
size = None
def preamble_repl(match): return _svg_preamble_dst.format(
attribs=attribs,
size=size if size else
# The original size is in mm, convert that to pixels on 96 DPI
# and then to rem assuming 1 rem = 16px
'{:.2f}rem'.format(float(match.group('width'))*9.6/2.54/16.0, 2),
viewBox=match.group('viewBox'))
svg = _svg_preamble_src.sub(preamble_repl, svg)
return [nodes.raw('', svg, format='html')]
def qrCode(self, data, errorCorrection='L', boxSize='10', borderWidth='4'):
parsedErrorCorrection = {
'L': qrcode.constants.ERROR_CORRECT_L,
'M': qrcode.constants.ERROR_CORRECT_M,
'Q': qrcode.constants.ERROR_CORRECT_Q,
'H': qrcode.constants.ERROR_CORRECT_H,
}.get(errorCorrection, qrcode.constants.ERROR_CORRECT_L)
try:
parsedBoxSize = int(boxSize)
except ValueError:
parsedBoxSize = 10
try:
parsedBorderWidth = int(borderWidth)
except ValueError:
parsedBorderWidth = 4
#Generate the image
svg = qrcode.make(data,
error_correction=parsedErrorCorrection,
box_size=parsedBoxSize,
border=parsedBorderWidth,
image_factory=qrcode.image.svg.SvgImage)
#Output it to a string
output = io.BytesIO()
svg.save(output)
image = output.getvalue()
cherrypy.response.headers['Content-Type'] = 'image/svg+xml'
return image
def get(self, request, *args, **kwargs):
qr = qrcode.QRCode()
qr.add_data(self.get_url()[0])
qr.make(fit=True)
svg = qr.make_image(image_factory=qrcode.image.svg.SvgPathFillImage)
svg_bytes = io.BytesIO()
svg.save(svg_bytes)
return HttpResponse(svg_bytes.getvalue(), content_type="image/svg+xml")
def test_generate_qr_code_svg():
import qrcode.image.svg
qr = cwa.generate_qr_code(full_event_description)
svg = qr.make_image(image_factory=qrcode.image.svg.SvgPathFillImage)
svg_bytes = io.BytesIO()
svg.save(svg_bytes)
assert svg_bytes.getvalue().startswith(b'<?xml')
def get_qr_code(data=None, border=2, box_size=7):
qr = qrcode.QRCode(image_factory=qrcode.image.svg.SvgImage,
border=border,
box_size=box_size)
qr.add_data(data)
svg = qr.make_image()
svg_content = io.BytesIO()
svg.save(svg_content)
content = svg_content.getvalue().decode("utf-8")
return content
def qr_code_image(request, slug):
# Generate SVG once a runtime
image_path = os.path.join(tempfile.gettempdir(), '{}.svg'.format(slug))
if not os.path.exists(image_path):
poll_url = accessible_url(request, reverse('vote', args=[slug]))
svg = qrcode.make(poll_url, image_factory=qrcode.image.svg.SvgPathImage)
svg.save(image_path)
# Render SVG
response = HttpResponse(content_type='image/svg+xml')
with open(image_path) as svg:
response.write(svg.read())
return response
def qr_code_image(request, slug):
# Generate SVG once a runtime
image_path = os.path.join(tempfile.gettempdir(), '{}.svg'.format(slug))
if not os.path.exists(image_path):
poll_url = accessible_url(request, reverse('vote', args=[slug]))
svg = qrcode.make(poll_url,
image_factory=qrcode.image.svg.SvgPathImage)
svg.save(image_path)
# Render SVG
response = HttpResponse(content_type='image/svg+xml')
with open(image_path) as svg:
response.write(svg.read())
return response
def _generate(cls, uri):
code = qrcode.QRCode(version=3,
error_correction=qrcode.constants.ERROR_CORRECT_L,
box_size=5,
border=3,
image_factory=cls)
code.add_data(uri)
svg = code.make_image()
stream = io.BytesIO()
svg.save(stream)
stream.seek(0)
data = stream.read()
if len(cls.YUU_CACHE) > MAX_QR_CACHE_ENTRIES:
cls.YUU_CACHE.popitem()
cls.YUU_CACHE[uri] = data
return data
def get_context_data(self, **kwargs):
ctx = super().get_context_data(**kwargs)
url, df, dt = self.get_url()
qr = qrcode.QRCode()
qr.add_data(url)
qr.make(fit=True)
svg = qr.make_image(image_factory=qrcode.image.svg.SvgPathFillImage)
svg_bytes = io.BytesIO()
svg.save(svg_bytes)
ctx["svg"] = re.sub(r"<\?[^?]+\?>", "", svg_bytes.getvalue().decode())
ctx["event"] = self.request.event
ctx["df"] = df
ctx["dt"] = dt
ctx["refresh"] = max(min((dt - now()).seconds - 60, 600), 15)
return ctx
def _generate(cls, uri):
code = qrcode.QRCode(
version=3,
error_correction=qrcode.constants.ERROR_CORRECT_L,
box_size=5,
border=3,
image_factory=cls
)
code.add_data(uri)
svg = code.make_image()
stream = io.BytesIO()
svg.save(stream)
stream.seek(0)
data = stream.read()
if len(cls.YUU_CACHE) > MAX_QR_CACHE_ENTRIES:
cls.YUU_CACHE.popitem()
cls.YUU_CACHE[uri] = data
return data
