1 files changed, 143 insertions, 0 deletions
diff --git a/gallery_dl/extractor/rule34xyz.py b/gallery_dl/extractor/rule34xyz.py
new file mode 100644
index 0000000..f1e7518
--- /dev/null
+++ b/gallery_dl/extractor/rule34xyz.py
@@ -0,0 +1,143 @@
+# -*- coding: utf-8 -*-
+
+# Copyright 2024 Mike Fährmann
+#
+# 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://rule34.xyz/"""
+
+from .booru import BooruExtractor
+from .. import text
+import collections
+
+BASE_PATTERN = r"(?:https?://)?rule34\.xyz"
+
+
+class Rule34xyzExtractor(BooruExtractor):
+    category = "rule34xyz"
+    root = "https://rule34.xyz"
+    root_cdn = "https://rule34xyz.b-cdn.net"
+    filename_fmt = "{category}_{id}.{extension}"
+    per_page = 60
+
+    TAG_TYPES = {
+        0: "general",
+        1: "copyright",
+        2: "character",
+        3: "artist",
+    }
+
+    def _init(self):
+        formats = self.config("format")
+        if formats:
+            if isinstance(formats, str):
+                formats = formats.split(",")
+            self.formats = formats
+        else:
+            self.formats = ("10", "40", "41", "2")
+
+    def _file_url(self, post):
+        post["files"] = files = {
+            str(link["type"]): link["url"]
+            for link in post.pop("imageLinks")
+        }
+
+        for fmt in self.formats:
+            if fmt in files:
+                break
+        else:
+            fmt = "2"
+            self.log.warning("%s: Requested format not available", post["id"])
+
+        post["file_url"] = url = files[fmt]
+        post["format_id"] = fmt
+        post["format"] = url.rsplit(".", 2)[1]
+        return url
+
+    def _prepare(self, post):
+        post.pop("filesPreview", None)
+        post.pop("tagsWithType", None)
+        post["date"] = text.parse_datetime(
+            post["created"], "%Y-%m-%dT%H:%M:%S.%f")
+
+    def _tags(self, post, _):
+        if post.get("tagsWithType") is None:
+            post.update(self._fetch_post(post["id"]))
+
+        tags = collections.defaultdict(list)
+        for tag in post["tagsWithType"]:
+            tags[tag["type"]].append(tag["value"])
+        types = self.TAG_TYPES
+        for type, values in tags.items():
+            post["tags_" + types[type]] = values
+
+    def _fetch_post(self, post_id):
+        url = "{}/api/post/{}".format(self.root, post_id)
+        return self.request(url).json()
+
+    def _pagination(self, endpoint, params=None):
+        url = "{}/api{}".format(self.root, endpoint)
+
+        if params is None:
+            params = {}
+        params["IncludeLinks"] = "true"
+        params["IncludeTags"] = "true"
+        params["OrderBy"] = "0"
+        params["Skip"] = self.page_start * self.per_page
+        params["Take"] = self.per_page
+        params["DisableTotal"] = "true"
+        threshold = self.per_page
+
+        while True:
+            data = self.request(url, params=params).json()
+
+            yield from data["items"]
+
+            if len(data["items"]) < threshold:
+                return
+            params["Skip"] += params["Take"]
+
+
+class Rule34xyzPostExtractor(Rule34xyzExtractor):
+    subcategory = "post"
+    archive_fmt = "{id}"
+    pattern = BASE_PATTERN + r"/post/(\d+)"
+    example = "https://rule34.xyz/post/12345"
+
+    def posts(self):
+        return (self._fetch_post(self.groups[0]),)
+
+
+class Rule34xyzPlaylistExtractor(Rule34xyzExtractor):
+    subcategory = "playlist"
+    directory_fmt = ("{category}", "{playlist_id}")
+    archive_fmt = "p_{playlist_id}_{id}"
+    pattern = BASE_PATTERN + r"/playlists/view/(\d+)"
+    example = "https://rule34.xyz/playlists/view/12345"
+
+    def metadata(self):
+        return {"playlist_id": self.groups[0]}
+
+    def posts(self):
+        endpoint = "/playlist-item"
+        params = {"PlaylistId": self.groups[0]}
+        return self._pagination(endpoint, params)
+
+
+class Rule34xyzTagExtractor(Rule34xyzExtractor):
+    subcategory = "tag"
+    directory_fmt = ("{category}", "{search_tags}")
+    archive_fmt = "t_{search_tags}_{id}"
+    pattern = BASE_PATTERN + r"/([^/?#]+)$"
+    example = "https://rule34.xyz/TAG"
+
+    def metadata(self):
+        self.tags = text.unquote(self.groups[0]).replace("_", " ")
+        return {"search_tags": self.tags}
+
+    def posts(self):
+        endpoint = "/post/search"
+        params = {"Tag": self.tags}
+        return self._pagination(endpoint, params)