[mangadex] add 'data-saver' option (#8573)

gallery_dl/extractor/mangadex.py

@@ -136,13 +136,19 @@ class MangadexChapterExtractor(MangadexExtractor):
 
         yield Message.Directory, data
 
+        if self.config("data-saver", False):
+            path = "data-saver"
+            key = "dataSaver"
+        else:
+            path = key = "data"
+
         server = self.api.athome_server(self.uuid)
         chapter = server["chapter"]
-        base = f"{server['baseUrl']}/data/{chapter['hash']}/"
+        base = f"{server['baseUrl']}/{path}/{chapter['hash']}/"
 
         enum = util.enumerate_reversed if self.config(
             "page-reverse") else enumerate
-        for data["page"], page in enum(chapter["data"], 1):
+        for data["page"], page in enum(chapter[key], 1):
             text.nameext_from_url(page, data)
             yield Message.Url, f"{base}{page}", data