[pornstarstube] add support (#8576)

* Add support for pornstars.tube
* update
    - adjust pattern/example/page_url
    - extract '' & '' metadata
    - prevent unnecessary request
    - fix result URLs
    - return list comprehension result
* update supportedsites
* update test results
* fix extractor name

---------

Co-authored-by: Mike Fährmann <mike_faehrmann@web.de>

gallery_dl/extractor/__init__.py

@@ -161,6 +161,7 @@ modules = [
     "poringa",
     "pornhub",
     "pornpics",
+    "pornstarstube",
     "postmill",
     "rawkuma",
     "reactor",

gallery_dl/extractor/pornstarstube.py

@@ -0,0 +1,43 @@
+# -*- coding: utf-8 -*-
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as
+# published by the Free Software Foundation.
+
+"""Extractors for https://pornstars.tube/"""
+
+from .common import GalleryExtractor
+from .. import text
+
+
+class PornstarstubeGalleryExtractor(GalleryExtractor):
+    """Extractor for image galleries from pornstars.tube"""
+    category = "pornstarstube"
+    root = "https://pornstars.tube"
+    pattern = (r"(?:https?://)?(?:www\.)?pornstars\.tube"
+               r"/albums/(\d+)(?:/([\w-]+))?")
+    example = "https://pornstars.tube/albums/12345/SLUG/"
+
+    def __init__(self, match):
+        url = f"{self.root}/albums/{match[1]}/{match[2] or 'a'}/"
+        GalleryExtractor.__init__(self, match, url)
+
+    def metadata(self, page):
+        gid, slug = self.groups
+        return {
+            "gallery_id": text.parse_int(gid),
+            "slug"      : slug or "",
+            "title"     : text.unescape(text.extr(
+                page, "<title>", " - PORNSTARS.TUBE</title>")),
+            "description": text.unescape(text.extr(
+                page, 'name="description" content="', '"')),
+            "tags": text.extr(
+                page, 'name="keywords" content="', '"').split(", "),
+        }
+
+    def images(self, page):
+        album = text.extr(page, 'class="block-album"', "\n</div>")
+        return [
+            (url, None)
+            for url in text.extract_iter(album, ' href="', '"')
+        ]