[mangadex:covers] fix '400 Bad Request' when using 'lang' option

Author: mikf

gallery_dl/extractor/mangadex.py

@@ -410,7 +410,7 @@ def _pagination_covers(self, endpoint, params=None, auth=False):
         lang = self.extractor.config("lang")
         if isinstance(lang, str) and "," in lang:
             lang = lang.split(",")
-        params["locales"] = lang
+        params["locales[]"] = lang
         params["contentRating"] = None
         params["order[volume]"] = \
             "desc" if self.extractor.config("chapter-reverse") else "asc"

test/results/mangadex.py

@@ -298,8 +298,9 @@
 {
     "#url"     : "https://mangadex.org/title/192aa767-2479-42c1-9780-8d65a2efd36a/gachiakuta?tab=art",
     "#class"   : mangadex.MangadexCoversExtractor,
+    "#options" : {"lang": ["ja", "en", "fa", "zh"]},
     "#pattern" : r"https://mangadex\.org/covers/192aa767-2479-42c1-9780-8d65a2efd36a/[\w-]+\.jpg",
-    "#count"   : 20,
+    "#count"   : 21,
 
     "artist"      : ["Urana Kei"],
     "author"      : ["Urana Kei"],
@@ -309,7 +310,7 @@
     "extension"   : {"jpg", "png"},
     "filename"    : str,
     "lang"        : {"ja", "fa"},
-    "manga"       : "GACHIAKUTA",
+    "manga"       : "Gachiakuta",
     "manga_id"    : "192aa767-2479-42c1-9780-8d65a2efd36a",
     "status"      : "ongoing",
     "volume"      : range(1, 20),