[patreon] add 'format-images' option (#6569)

gallery_dl/extractor/patreon.py

@@ -35,6 +35,11 @@ class PatreonExtractor(Extractor):
                 self.session.headers["User-Agent"] = \
                     "Patreon/7.6.28 (Android; Android 11; Scale/2.10)"
 
+        format_images = self.config("format-images")
+        if format_images:
+            self._images_fmt = format_images
+            self._images_url = self._images_url_fmt
+
     def items(self):
         generators = self._build_file_generators(self.config("files"))
 
@@ -79,11 +84,20 @@ class PatreonExtractor(Extractor):
 
     def _images(self, post):
         for image in post.get("images") or ():
-            url = image.get("download_url")
+            url = self._images_url(image)
             if url:
                 name = image.get("file_name") or self._filename(url) or url
                 yield "image", url, name
 
+    def _images_url(self, image):
+        return image.get("download_url")
+
+    def _images_url_fmt(self, image):
+        try:
+            return image["image_urls"][self._images_fmt]
+        except Exception:
+            return image.get("download_url")
+
     def _image_large(self, post):
         image = post.get("image")
         if image: