def convert(self, blob, size=500):
"""Size is the maximum horizontal size."""
in_fn = make_temp_file(blob)
out_fn = mktemp(dir=TMP_DIR)
l = []
try:
subprocess.check_call(['pdftoppm', '-jpeg', in_fn, out_fn])
l = glob.glob("%s-*.jpg" % out_fn)
l.sort()
converted_images = []
for fn in l:
converted = resize(open(fn).read(), size)
converted_images.append(converted)
return converted_images
except Exception, e:
raise ConversionError(e)
def preview(file_id):
"""Returns a preview (image) for the file given by its id."""
f = get_file(file_id)
size = int(request.args.get("size", 0))
# Just in case
if size > 1000:
size = 1000
if f.mime_type.startswith("image/"):
image = f.data
if size:
image = resize(image, size)
else:
page = int(request.args.get("page", 0))
image = converter.to_image(f.digest, f.data, f.mime_type, page, size)
response = make_response(image)
response.headers['content-type'] = "image/jpeg"
return response