def generate_image_url(image, filter_spec):
signature = generate_signature(image.id, filter_spec)
url = reverse('wagtailimages_serve', args=(signature, image.id, filter_spec))
image_filename = image.file.name[len('original_images/'):1]
return settings.WAGTAILAPI_BASE_URL + url + image_filename
def generate_url(request, image_id, filter_spec):
# Get the image
Image = get_image_model()
try:
image = Image.objects.get(id=image_id)
except Image.DoesNotExist:
return json_response({"error": "Cannot find image."}, status=404)
# Check if this user has edit permission on this image
if not image.is_editable_by_user(request.user):
return json_response({"error": "You do not have permission to generate a URL for this image."}, status=403)
# Parse the filter spec to make sure its valid
try:
Filter(spec=filter_spec).operations
except InvalidFilterSpecError:
return json_response({"error": "Invalid filter spec."}, status=400)
# Generate url
signature = generate_signature(image_id, filter_spec)
url = reverse("wagtailimages_serve", args=(signature, image_id, filter_spec))
# Get site root url
try:
site_root_url = Site.objects.get(is_default_site=True).root_url
except Site.DoesNotExist:
site_root_url = Site.objects.first().root_url
# Generate preview url
preview_url = reverse("wagtailimages:preview", args=(image_id, filter_spec))
return json_response({"url": site_root_url + url, "preview_url": preview_url}, status=200)
def test_get(self):
"""
This tests that the view responds correctly for a user with edit permissions on this image
"""
# Get
response = self.client.get(
reverse('wagtailimages:generate_url',
args=(self.image.id, 'fill-800x600')))
# Check response
self.assertEqual(response.status_code, 200)
self.assertEqual(response['Content-Type'], 'application/json')
# Check JSON
content_json = json.loads(response.content.decode())
self.assertEqual(set(content_json.keys()), set(['url', 'preview_url']))
expected_url = 'http://localhost/images/%(signature)s/%(image_id)d/fill-800x600/' % {
'signature':
urlquote(generate_signature(self.image.id,
'fill-800x600').decode(),
safe=urlquote_safechars),
'image_id':
self.image.id,
}
self.assertEqual(content_json['url'], expected_url)
expected_preview_url = reverse('wagtailimages:preview',
args=(self.image.id, 'fill-800x600'))
self.assertEqual(content_json['preview_url'], expected_preview_url)
def generate_image_url(image, filter_spec):
signature = generate_signature(image.id, filter_spec)
url = reverse('wagtailimages_serve',
args=(signature, image.id, filter_spec))
# Append image's original filename to the URL (optional)
url += image.file.name[len('original_images/'):]
return url
def test_get_invalid_signature(self):
"""
Test that an invalid signature returns a 403 response
"""
# Generate a signature for the incorrect image id
signature = generate_signature(self.image.id + 1, 'fill-800x600')
# Get the image
response = self.client.get(reverse('wagtailimages_serve', args=(signature, self.image.id, 'fill-800x600')))
# Check response
self.assertEqual(response.status_code, 403)
def generate_image_url(image, filter_spec):
signature = generate_signature(image.id, filter_spec)
url = reverse('wagtailimages_serve', args=(signature, image.id, filter_spec))
try:
site_root_url = Site.objects.get(is_default_site=True).root_url
except Site.DoesNotExist:
site_root_url = Site.objects.first().root_url
image_filename = image.file.name[len('original_images/'):]
return url + image_filename
def generate_image_url(image, filter_spec):
signature = generate_signature(image.id, filter_spec)
url = reverse('wagtailimages_serve', args=(signature, image.id, filter_spec))
try:
site_root_url = Site.objects.get(is_default_site=True).root_url
except Site.DoesNotExist:
site_root_url = Site.objects.first().root_url
image_filename = image.file.name[len('original_images/'):]
return site_root_url + url + image_filename
def test_get(self):
"""
Test a valid GET request to the view
"""
# Generate signature
signature = generate_signature(self.image.id, 'fill-800x600')
# Get the image
response = self.client.get(reverse('wagtailimages_serve', args=(signature, self.image.id, 'fill-800x600')))
# Check response
self.assertEqual(response.status_code, 200)
self.assertEqual(response['Content-Type'], 'image/jpeg')
def test_get(self):
"""
Test a valid GET request to the view
"""
# Generate signature
signature = generate_signature(self.image.id, "fill-800x600")
# Get the image
response = self.client.get(reverse("wagtailimages_serve", args=(signature, self.image.id, "fill-800x600")))
# Check response
self.assertEqual(response.status_code, 200)
self.assertEqual(response["Content-Type"], "image/png")
def test_get_invalid_signature(self):
"""
Test that an invalid signature returns a 403 response
"""
# Generate a signature for the incorrect image id
signature = generate_signature(self.image.id + 1, 'fill-800x600')
# Get the image
response = self.client.get(
reverse('wagtailimages_serve',
args=(signature, self.image.id, 'fill-800x600')))
# Check response
self.assertEqual(response.status_code, 403)
def test_get(self):
"""
Test a valid GET request to the view
"""
# Generate signature
signature = generate_signature(self.image.id, 'fill-800x600')
# Get the image
response = self.client.get(
reverse('wagtailimages_serve',
args=(signature, self.image.id, 'fill-800x600')))
# Check response
self.assertEqual(response.status_code, 200)
self.assertEqual(response['Content-Type'], 'image/jpeg')
def test_get_invalid_filter_spec(self):
"""
Test that an invalid filter spec returns a 400 response
This is very unlikely to happen in reality. A user would have
to create signature for the invalid filter spec which can't be
done with Wagtails built in URL generator. We should test it
anyway though.
"""
# Generate a signature with the invalid filterspec
signature = generate_signature(self.image.id, 'bad-filter-spec')
# Get the image
response = self.client.get(reverse('wagtailimages_serve', args=(signature, self.image.id, 'bad-filter-spec')))
# Check response
self.assertEqual(response.status_code, 400)
def generate_url(request, image_id, filter_spec):
# Get the image
Image = get_image_model()
try:
image = Image.objects.get(id=image_id)
except Image.DoesNotExist:
return JsonResponse({'error': "Cannot find image."}, status=404)
# Check if this user has edit permission on this image
if not permission_policy.user_has_permission_for_instance(
request.user, 'change', image):
return JsonResponse(
{
'error':
"You do not have permission to generate a URL for this image."
},
status=403)
# Parse the filter spec to make sure its valid
try:
Filter(spec=filter_spec).operations
except InvalidFilterSpecError:
return JsonResponse({'error': "Invalid filter spec."}, status=400)
# Generate url
signature = generate_signature(image_id, filter_spec)
url = reverse('wagtailimages_serve',
args=(signature, image_id, filter_spec))
# Get site root url
try:
site_root_url = Site.objects.get(is_default_site=True).root_url
except Site.DoesNotExist:
site_root_url = Site.objects.first().root_url
# Generate preview url
preview_url = reverse('wagtailimages:preview',
args=(image_id, filter_spec))
return JsonResponse(
{
'url': site_root_url + url,
'preview_url': preview_url
}, status=200)
def test_get_invalid_filter_spec(self):
"""
Test that an invalid filter spec returns a 400 response
This is very unlikely to happen in reality. A user would have
to create signature for the invalid filter spec which can't be
done with Wagtails built in URL generator. We should test it
anyway though.
"""
# Generate a signature with the invalid filterspec
signature = generate_signature(self.image.id, 'bad-filter-spec')
# Get the image
response = self.client.get(
reverse('wagtailimages_serve',
args=(signature, self.image.id, 'bad-filter-spec')))
# Check response
self.assertEqual(response.status_code, 400)
def generate_url(request, image_id, filter_spec):
# Get the image
Image = get_image_model()
try:
image = Image.objects.get(id=image_id)
except Image.DoesNotExist:
return JsonResponse({
'error': "Cannot find image."
}, status=404)
# Check if this user has edit permission on this image
if not permission_policy.user_has_permission_for_instance(request.user, 'change', image):
return JsonResponse({
'error': "You do not have permission to generate a URL for this image."
}, status=403)
# Parse the filter spec to make sure its valid
try:
Filter(spec=filter_spec).operations
except InvalidFilterSpecError:
return JsonResponse({
'error': "Invalid filter spec."
}, status=400)
# Generate url
signature = generate_signature(image_id, filter_spec)
url = reverse('wagtailimages_serve', args=(signature, image_id, filter_spec))
# Get site root url
try:
site_root_url = Site.objects.get(is_default_site=True).root_url
except Site.DoesNotExist:
site_root_url = Site.objects.first().root_url
# Generate preview url
preview_url = reverse('wagtailimages:preview', args=(image_id, filter_spec))
return JsonResponse({'url': site_root_url + url, 'preview_url': preview_url}, status=200)
def test_get(self):
"""
This tests that the view responds correctly for a user with edit permissions on this image
"""
# Get
response = self.client.get(reverse("wagtailimages:generate_url", args=(self.image.id, "fill-800x600")))
# Check response
self.assertEqual(response.status_code, 200)
self.assertEqual(response["Content-Type"], "application/json")
# Check JSON
content_json = json.loads(response.content.decode())
self.assertEqual(set(content_json.keys()), set(["url", "preview_url"]))
expected_url = "http://localhost/images/%(signature)s/%(image_id)d/fill-800x600/" % {
"signature": urlquote(generate_signature(self.image.id, "fill-800x600").decode(), safe=urlquote_safechars),
"image_id": self.image.id,
}
self.assertEqual(content_json["url"], expected_url)
expected_preview_url = reverse("wagtailimages:preview", args=(self.image.id, "fill-800x600"))
self.assertEqual(content_json["preview_url"], expected_preview_url)
def test_get(self):
"""
This tests that the view responds correctly for a user with edit permissions on this image
"""
# Get
response = self.client.get(reverse('wagtailimages:generate_url', args=(self.image.id, 'fill-800x600')))
# Check response
self.assertEqual(response.status_code, 200)
self.assertEqual(response['Content-Type'], 'application/json')
# Check JSON
content_json = json.loads(response.content.decode())
self.assertEqual(set(content_json.keys()), set(['url', 'preview_url']))
expected_url = 'http://localhost/images/%(signature)s/%(image_id)d/fill-800x600/' % {
'signature': urlquote(generate_signature(self.image.id, 'fill-800x600').decode(), safe=urlquote_safechars),
'image_id': self.image.id,
}
self.assertEqual(content_json['url'], expected_url)
expected_preview_url = reverse('wagtailimages:preview', args=(self.image.id, 'fill-800x600'))
self.assertEqual(content_json['preview_url'], expected_preview_url)
def test_signature_generation(self):
self.assertEqual(generate_signature(100, 'fill-800x600'),
b'xnZOzQyUg6pkfciqcfRJRosOrGg=')
def test_signature_generation(self):
self.assertEqual(generate_signature(100, 'fill-800x600'), b'xnZOzQyUg6pkfciqcfRJRosOrGg=')
