add '_extractor' information to redirect results

gallery_dl/extractor/imgur.py

@@ -153,7 +153,7 @@ class ImgurAlbumExtractor(ImgurExtractor):
                     "is_album"    : True,
                     "layout"      : "blog",
                     "link"        : "https://imgur.com/a/TcBmP",
-                    "nsfw"        : False,
+                    "nsfw"        : True,
                     "privacy"     : "hidden",
                     "section"     : None,
                     "title"       : "138",

gallery_dl/extractor/pinterest.py

@@ -175,7 +175,7 @@ class PinterestPinitExtractor(PinterestExtractor):
                                         "https://pin.it/None",
                                         "https://www.pinterest.com"):
             raise exception.NotFoundError("pin")
-        yield Message.Queue, location, {}
+        yield Message.Queue, location, {"_extractor": PinterestPinExtractor}
 
 
 class PinterestAPI():

gallery_dl/extractor/pixiv.py

@@ -142,10 +142,11 @@ class PixivMeExtractor(PixivExtractor):
 
     def items(self):
         url = "https://pixiv.me/" + self.account
+        data = {"_extractor": PixivUserExtractor}
         response = self.request(
             url, method="HEAD", allow_redirects=False, notfound="user")
         yield Message.Version, 1
-        yield Message.Queue, response.headers["Location"], {}
+        yield Message.Queue, response.headers["Location"], data
 
 
 class PixivWorkExtractor(PixivExtractor):

gallery_dl/extractor/wikiart.py

@@ -69,8 +69,8 @@ class WikiartArtistExtractor(WikiartExtractor):
     directory_fmt = ("{category}", "{artist[artistName]}")
     pattern = BASE_PATTERN + r"/(?!\w+-by-)([\w-]+)"
     test = ("https://www.wikiart.org/en/thomas-cole", {
-        "url": "f1eee8158f5b8b7380382ab730a8f53884715c8b",
-        "keyword": "c61f5a4774b977106000e9554d19cfb9438a7032",
+        "url": "9049e52e897b9ae6586df4c2c4f827d0a19dafa3",
+        "keyword": "c3168b21a993707c41efb7674e8c90d53a79d483",
     })
 
     def __init__(self, match):