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126 lines
4.3 KiB
126 lines
4.3 KiB
# -*- coding: utf-8 -*-
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# Copyright 2022-2023 Mike Fährmann
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License version 2 as
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# published by the Free Software Foundation.
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"""Extractors for https://8chan.moe/"""
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from .common import Extractor, Message
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from .. import text
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from ..cache import memcache
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from datetime import datetime, timedelta
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import itertools
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BASE_PATTERN = r"(?:https?://)?8chan\.(moe|se|cc)"
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class _8chanExtractor(Extractor):
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"""Base class for 8chan extractors"""
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category = "8chan"
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root = "https://8chan.moe"
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def __init__(self, match):
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self.root = "https://8chan." + match.group(1)
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Extractor.__init__(self, match)
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def _init(self):
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self.cookies.set("TOS", "1", domain=self.root.rpartition("/")[2])
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@memcache()
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def cookies_prepare(self):
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# fetch captcha cookies
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# (necessary to download without getting interrupted)
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now = datetime.utcnow()
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url = self.root + "/captcha.js"
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params = {"d": now.strftime("%a %b %d %Y %H:%M:%S GMT+0000 (UTC)")}
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self.request(url, params=params).content
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# adjust cookies
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# - remove 'expires' timestamp
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# - move 'captchaexpiration' value forward by 1 month)
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domain = self.root.rpartition("/")[2]
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for cookie in self.cookies:
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if cookie.domain.endswith(domain):
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cookie.expires = None
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if cookie.name == "captchaexpiration":
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cookie.value = (now + timedelta(30, 300)).strftime(
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"%a, %d %b %Y %H:%M:%S GMT")
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return self.cookies
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class _8chanThreadExtractor(_8chanExtractor):
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"""Extractor for 8chan threads"""
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subcategory = "thread"
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directory_fmt = ("{category}", "{boardUri}",
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"{threadId} {subject[:50]}")
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filename_fmt = "{postId}{num:?-//} {filename[:200]}.{extension}"
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archive_fmt = "{boardUri}_{postId}_{num}"
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pattern = BASE_PATTERN + r"/([^/?#]+)/res/(\d+)"
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example = "https://8chan.moe/a/res/12345.html"
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def __init__(self, match):
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_8chanExtractor.__init__(self, match)
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_, self.board, self.thread = match.groups()
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def items(self):
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# fetch thread data
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url = "{}/{}/res/{}.".format(self.root, self.board, self.thread)
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self.session.headers["Referer"] = url + "html"
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thread = self.request(url + "json").json()
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thread["postId"] = thread["threadId"]
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thread["_http_headers"] = {"Referer": url + "html"}
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try:
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self.cookies = self.cookies_prepare()
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except Exception as exc:
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self.log.debug("Failed to fetch captcha cookies: %s: %s",
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exc.__class__.__name__, exc, exc_info=True)
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# download files
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posts = thread.pop("posts", ())
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yield Message.Directory, thread
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for post in itertools.chain((thread,), posts):
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files = post.pop("files", ())
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if not files:
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continue
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thread.update(post)
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for num, file in enumerate(files):
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file.update(thread)
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file["num"] = num
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text.nameext_from_url(file["originalName"], file)
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yield Message.Url, self.root + file["path"], file
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class _8chanBoardExtractor(_8chanExtractor):
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"""Extractor for 8chan boards"""
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subcategory = "board"
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pattern = BASE_PATTERN + r"/([^/?#]+)/(?:(\d+)\.html)?$"
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example = "https://8chan.moe/a/"
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def __init__(self, match):
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_8chanExtractor.__init__(self, match)
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_, self.board, self.page = match.groups()
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def items(self):
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page = text.parse_int(self.page, 1)
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url = "{}/{}/{}.json".format(self.root, self.board, page)
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board = self.request(url).json()
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threads = board["threads"]
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while True:
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for thread in threads:
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thread["_extractor"] = _8chanThreadExtractor
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url = "{}/{}/res/{}.html".format(
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self.root, self.board, thread["threadId"])
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yield Message.Queue, url, thread
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page += 1
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if page > board["pageCount"]:
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return
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url = "{}/{}/{}.json".format(self.root, self.board, page)
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threads = self.request(url).json()["threads"]
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