Add Kohlchan extractor (#2251)

gallery_dl/extractor/__init__.py

@@ -68,6 +68,7 @@
     "keenspot",
     "kemonoparty",
     "khinsider",
+    "kohlchan",
     "komikcast",
     "lineblog",
     "livedoor",

gallery_dl/extractor/kohlchan.py

@@ -0,0 +1,78 @@
+# -*- 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://kohlchan.net/"""
+
+from .common import Extractor, Message
+from .. import text
+import itertools
+
+
+class KohlchanThreadExtractor(Extractor):
+    """Extractor for Kohlchan threads"""
+    category = "kohlchan"
+    subcategory = "thread"
+    directory_fmt = ("{category}", "{boardUri}",
+                     "{threadId} {subject|message[:50]}")
+    filename_fmt = "{postId}{num:?-//} {filename}.{extension}"
+    archive_fmt = "{boardUri}_{postId}_{num}"
+    pattern = r"(?:https?://)?kohlchan\.net/([^/?#]+)/res/(\d+)"
+    test = ("https://kohlchan.net/a/res/4594.html", {
+        "pattern": r"https://kohlchan\.net/\.media/[0-9a-f]{64}(\.\w+)?$",
+        "count": ">= 80",
+    })
+
+    def __init__(self, match):
+        Extractor.__init__(self, match)
+        self.board, self.thread = match.groups()
+
+    def items(self):
+        url = "https://kohlchan.net/{}/res/{}.json".format(
+            self.board, self.thread)
+        thread = self.request(url).json()
+        thread["postId"] = thread["threadId"]
+        posts = thread.pop("posts")
+
+        yield Message.Directory, thread
+
+        for post in itertools.chain((thread,), posts):
+            files = post.pop("files", ())
+            if files:
+                thread.update(post)
+                for num, file in enumerate(files):
+                    file.update(thread)
+                    file["num"] = num
+                    url = "https://kohlchan.net" + file["path"]
+                    text.nameext_from_url(file["originalName"], file)
+                    yield Message.Url, url, file
+
+
+class KohlchanBoardExtractor(Extractor):
+    """Extractor for Kohlchan boards"""
+    category = "kohlchan"
+    subcategory = "board"
+    pattern = (r"(?:https?://)?kohlchan\.net"
+               r"/([^/?#]+)/(?:(?:catalog|\d+)\.html)?$")
+    test = (
+        ("https://kohlchan.net/a/", {
+            "pattern": KohlchanThreadExtractor.pattern,
+            "count": ">= 100",
+        }),
+        ("https://kohlchan.net/a/2.html"),
+        ("https://kohlchan.net/a/catalog.html"),
+    )
+
+    def __init__(self, match):
+        Extractor.__init__(self, match)
+        self.board = match.group(1)
+
+    def items(self):
+        url = "https://kohlchan.net/{}/catalog.json".format(self.board)
+        for thread in self.request(url).json():
+            url = "https://kohlchan.net/{}/res/{}.html".format(
+                self.board, thread["threadId"])
+            thread["_extractor"] = KohlchanThreadExtractor
+            yield Message.Queue, url, thread