[azurelanewiki] prevent Anubis challenge

gallery_dl/extractor/wikimedia.py

@@ -33,9 +33,11 @@ class WikimediaExtractor(BaseExtractor):
 
         self.per_page = self.config("limit", 50)
 
+        if useragent := self.config_instance("useragent"):
+            self.useragent = useragent
+
     def _init(self):
-        api_path = self.config_instance("api-path")
-        if api_path:
+        if api_path := self.config_instance("api-path"):
             if api_path[0] == "/":
                 self.api_url = self.root + api_path
             else:
@@ -110,14 +112,12 @@ class WikimediaExtractor(BaseExtractor):
             data = self.request_json(url, params=params)
 
             # ref: https://www.mediawiki.org/wiki/API:Errors_and_warnings
-            error = data.get("error")
-            if error:
+            if error := data.get("error"):
                 self.log.error("%s: %s", error["code"], error["info"])
                 return
             # MediaWiki will emit warnings for non-fatal mistakes such as
             # invalid parameter instead of raising an error
-            warnings = data.get("warnings")
-            if warnings:
+            if warnings := data.get("warnings"):
                 self.log.debug("MediaWiki returned warnings: %s", warnings)
 
             try:
@@ -187,6 +187,7 @@ BASE_PATTERN = WikimediaExtractor.update({
         "root": "https://azurlane.koumakan.jp",
         "pattern": r"azurlane\.koumakan\.jp",
         "api-path": "/w/api.php",
+        "useragent": "Googlebot-Image/1.0",
     },
 })