def get_data_url(self, max_width = None):
data_url = b'data:{};base64,{}'
if self.is_image():
image_file = ImageBufferIO(self.file_data)
output = ImageBufferIO()
try:
image = Image.open(image_file)
s = image.size
if max_width and s[0] > max_width:
ratio = max_width / s[0]
width = s[0] * ratio
height = s[1] * ratio
self._generate_thumbnail(image, output, (width, height))
file_data = output.getvalue()
else:
file_data = image_file.getvalue()
except IOError:
file_data = self.file_data
logger.exception('Error when trying to resize image for data: url')
else:
file_data = self.file_data
data = bytes(url_quote(file_data.encode('base64')))
return data_url.format(self.content_type, data)
def get_data_url(self, max_width = None):
data_url = b'data:{};base64,{}'
if self.is_image():
image_file = ImageBufferIO(self.file_data)
output = ImageBufferIO()
try:
image = Image.open(image_file)
s = image.size
if max_width and s[0] > max_width:
ratio = max_width / s[0]
width = s[0] * ratio
height = s[1] * ratio
self._generate_thumbnail(image, output, (width, height))
file_data = output.getvalue()
else:
file_data = image_file.getvalue()
except IOError:
file_data = self.file_data
logger.exception('Error when trying to resize image for data: url')
else:
file_data = self.file_data
data = bytes(url_quote(file_data.encode('base64')))
return data_url.format(self.content_type, data)
def dispatch(self, request, *args, **kwargs):
try:
self.request = request
logger.debug('BEGIN REQUEST *********** {}'.format(request.path))
if not self._login_requirement_ok(request):
logger.debug('Login requirement is not ok, redirecting')
self.error('You were not logged in properly. Please try again')
return redirect('{}?{}={}'.format(
reverse(getattr(settings, 'ASYM_FAILED_LOGIN_URL', settings.LOGIN_REDIRECT_URL)),
REDIRECT_FIELD_NAME,
request.path,
))
if hasattr(request, 'user'):
logger.debug('User is: {}'.format(request.user))
else:
logger.debug('No user in request')
permissions_required = self._merge_attr('permissions_required')
logger.debug('The required permissions are {}'.format(permissions_required))
logger.debug('AsymBaseView: Getting form data')
self.get_form_data()
# Do any preprocessing, which should also fill out the arguments
# for the forms
logger.debug('AsymBaseView: Preprocess')
self.preprocess(request, *args, **kwargs)
# Create the form instances, and place into context
logger.debug('AsymBaseView: LoadForms')
self.load_forms(request)
logger.debug("AsymBaseView: Predispatch")
self.predispatch(request, *args, **kwargs)
logger.debug("AsymBaseView: Has Access")
if not self._has_access(request, *args, **kwargs):
self.error("You do not have permission to view that page")
return redirect(reverse(getattr(settings, 'ASYM_FAILED_LOGIN_URL')))
try:
logger.debug('AsymBaseView: dispatch')
response = super(AsymBaseView, self).dispatch(request, *args, **kwargs)
except ForceRollback:
# Ignore these because they're not real exceptions
response = self.render_to_response()
except ContentNotRenderedError as e:
logger.exception('Content not rendered for template {}.'.format(self.template_name))
self.template_name = '500.djhtml'
return self.render_to_response()
logger.debug('END REQUEST*********')
return response
except DeveloperTODO as e:
logger.error('{}'.format(e))
self.template_name = 'todo_error.djhtml'
return self.render_to_response()
def _generate_thumbnail(self, image_file, output, size = None):
try:
if Image.isImageType(image_file):
image = image_file
else:
image = Image.open(image_file)
if image.mode != 'RGB':
image = image.convert('RGB')
if size is None:
size = [self.Constants.PREVIEW_IMAGE_WIDTH, self.Constants.PREVIEW_IMAGE_HEIGHT]
image.thumbnail(
size,
Image.ANTIALIAS
)
image.save(output, 'JPEG')
except IOError:
logger.exception('Could not generate thumbnail')
raise PreviewImageGenerationFailed()
def _generate_thumbnail(self, image_file, output, size = None):
try:
if Image.isImageType(image_file):
image = image_file
else:
image = Image.open(image_file)
if image.mode != 'RGB':
image = image.convert('RGB')
if size is None:
size = [self.Constants.PREVIEW_IMAGE_WIDTH, self.Constants.PREVIEW_IMAGE_HEIGHT]
image.thumbnail(
size,
Image.ANTIALIAS
)
image.save(output, 'JPEG')
except IOError:
logger.exception('Could not generate thumbnail')
raise PreviewImageGenerationFailed()