1 files changed, 95 insertions, 0 deletions
diff --git a/gallery_dl/extractor/2chan.py b/gallery_dl/extractor/2chan.py
new file mode 100644
index 0000000..8df8645
--- /dev/null
+++ b/gallery_dl/extractor/2chan.py
@@ -0,0 +1,95 @@
+# -*- coding: utf-8 -*-
+
+# Copyright 2017-2019 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.
+
+"""Extract images from https://www.2chan.net/"""
+
+from .common import Extractor, Message
+from .. import text
+
+
+class FutabaThreadExtractor(Extractor):
+    """Extractor for images from threads on www.2chan.net"""
+    category = "2chan"
+    subcategory = "thread"
+    directory_fmt = ("{category}", "{board_name}", "{thread}")
+    filename_fmt = "{tim}.{extension}"
+    archive_fmt = "{board}_{thread}_{tim}"
+    url_fmt = "https://{server}.2chan.net/{board}/src/{filename}"
+    pattern = r"(?:https?://)?([^.]+)\.2chan\.net/([^/]+)/res/(\d+)"
+    test = ("http://dec.2chan.net/70/res/947.htm", {
+        "url": "c5c12b80b290e224b6758507b3bb952044f4595b",
+        "keyword": "4bd22e7a9c3636faecd6ea7082509e8655e10dd0",
+    })
+
+    def __init__(self, match):
+        Extractor.__init__(self, match)
+        self.server, self.board, self.thread = match.groups()
+
+    def items(self):
+        url = "https://{}.2chan.net/{}/res/{}.htm".format(
+            self.server, self.board, self.thread)
+        page = self.request(url).text
+        data = self.metadata(page)
+        yield Message.Version, 1
+        yield Message.Directory, data
+        for post in self.posts(page):
+            if "filename" not in post:
+                continue
+            post.update(data)
+            url = self.url_fmt.format_map(post)
+            yield Message.Url, url, post
+
+    def metadata(self, page):
+        """Collect metadata for extractor-job"""
+        title = text.extract(page, "<title>", "</title>")[0]
+        title, _, boardname = title.rpartition(" - ")
+        return {
+            "server": self.server,
+            "title": title,
+            "board": self.board,
+            "board_name": boardname[:-4],
+            "thread": self.thread,
+        }
+
+    def posts(self, page):
+        """Build a list of all post-objects"""
+        page = text.extract(
+            page, '<div class="thre"', '<div style="clear:left"></div>')[0]
+        return [
+            self.parse(post)
+            for post in page.split('<table border=0>')
+        ]
+
+    def parse(self, post):
+        """Build post-object by extracting data from an HTML post"""
+        data = self._extract_post(post)
+        if '<a href="/' in post:
+            self._extract_image(post, data)
+            data["tim"], _, data["extension"] = data["filename"].partition(".")
+            data["time"] = data["tim"][:-3]
+            data["ext"] = "." + data["extension"]
+        return data
+
+    @staticmethod
+    def _extract_post(post):
+        return text.extract_all(post, (
+            ("no"  , 'name="', '"'),
+            ("post", '<b>', '</b>'),
+            ("name", '<b>', ' </b>'),
+            ("now" , '</font> ', ' '),
+            (None  , '<blockquote', ''),
+            ("com" , '>', '</blockquote>'),
+        ))[0]
+
+    @staticmethod
+    def _extract_image(post, data):
+        text.extract_all(post, (
+            (None      , '_blank', ''),
+            ("filename", '>', '<'),
+            ("fsize"   , '(', ' '),
+        ), 0, data)