Fix case where Gfycat fails after redirect

bulkredditdownloader/site_downloaders/gfycat.py

@@ -28,7 +28,12 @@ class Gfycat(GifDeliveryNetwork):
         gfycat_id = re.match(r'.*/(.*?)/?$', url).group(1)
         url = 'https://gfycat.com/' + gfycat_id
 
-        page_source = requests.get(url).text
+        response = requests.get(url)
+        page_source = response.text
+
+        if 'gifdeliverynetwork' in response.url:
+            return GifDeliveryNetwork._get_link(url)
+
         soup = BeautifulSoup(page_source, 'html.parser')
         content = soup.find('script', attrs={'data-react-helmet': 'true', 'type': 'application/ld+json'})
 

bulkredditdownloader/tests/downloaders/test_gfycat.py

@@ -13,6 +13,7 @@ from bulkredditdownloader.site_downloaders.gfycat import Gfycat
 @pytest.mark.parametrize(('test_url', 'expected_url'), (
     ('https://gfycat.com/definitivecaninecrayfish', 'https://giant.gfycat.com/DefinitiveCanineCrayfish.mp4'),
     ('https://gfycat.com/dazzlingsilkyiguana', 'https://giant.gfycat.com/DazzlingSilkyIguana.mp4'),
+    ('https://gfycat.com/webbedimpurebutterfly', 'https://thumbs2.redgifs.com/WebbedImpureButterfly.mp4'),
 ))
 def test_get_link(test_url: str, expected_url: str):
     result = Gfycat._get_link(test_url)