def convert(request, chart_id):
chart = get_object_or_404(Chart, id=chart_id)
# Output svg data.
f, svg_path = tempfile.mkstemp()
png_path = utils.chart_image_path(chart_id)
with os.fdopen(f, "wb") as fd:
fd.write(request.POST["svg"])
# Convert to png.
status = subprocess.check_call(
["java", "-Xmx10m", "-Djava.awt.headless=true", "-jar", BATIK_JAR_PATH, "-d", png_path, svg_path]
)
# For debug purposes, if we were asked for svg, save the svg data as well. Otherwise delete it.
if request.POST["type"] == "image/svg+xml":
shutil.move(svg_path, utils.chart_image_path(chart_id, ext="svg"))
else:
os.remove(svg_path)
return image(request, chart_id)
def image(request, chart_id=None):
chart = get_object_or_404(Chart, id=chart_id)
try:
with open(utils.chart_image_path(chart.id), "rb") as f:
image_data = f.read()
except IOError:
raise Http404
return HttpResponse(image_data, mimetype="image/png")
