[furaffinity] remove end of system messages

gallery_dl/extractor/furaffinity.py

@@ -78,14 +78,12 @@ class FuraffinityExtractor(Extractor):
 
         path = extr('href="//d', '"')
         if not path:
-            self.log.warning(
-                "Unable to download post %s (\"%s\")",
-                post_id, text.remove_html(
-                    extr('System Message', '</section>') or
-                    extr('System Message', '</table>')
-                )
-            )
-            return None
+            msg = text.remove_html(
+                extr('System Message', '</section>') or
+                extr('System Message', '</table>')
+            ).partition(" . Continue ")[0]
+            return self.log.warning(
+                "Unable to download post %s (\"%s\")", post_id, msg)
 
         pi = text.parse_int
         rh = text.remove_html

test/results/furaffinity.py

@@ -159,6 +159,14 @@ __tests__ = (
     "width"       : 488,
 },
 
+{
+    "#url"     : "https://www.furaffinity.net/view/57587562",
+    "#comment" : "login required",
+    "#category": ("", "furaffinity", "post"),
+    "#class"   : furaffinity.FuraffinityPostExtractor,
+    "#count"   : 0,
+},
+
 {
     "#url"     : "https://furaffinity.net/view/21835115/",
     "#category": ("", "furaffinity", "post"),