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451 lines
17 KiB
451 lines
17 KiB
# -*- coding: utf-8 -*-
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# Copyright 2017-2020 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://www.reddit.com/"""
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from .common import Extractor, Message
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from .. import text, util, exception
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from ..cache import cache
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class RedditExtractor(Extractor):
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"""Base class for reddit extractors"""
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category = "reddit"
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directory_fmt = ("{category}", "{subreddit}")
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filename_fmt = "{id}{num:? //>02} {title[:220]}.{extension}"
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archive_fmt = "{filename}"
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cookiedomain = None
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def __init__(self, match):
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Extractor.__init__(self, match)
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self.api = RedditAPI(self)
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self.max_depth = self.config("recursion", 0)
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def items(self):
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match_submission = RedditSubmissionExtractor.pattern.match
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match_subreddit = RedditSubredditExtractor.pattern.match
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match_user = RedditUserExtractor.pattern.match
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parentdir = self.config("parent-directory")
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videos = self.config("videos", True)
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submissions = self.submissions()
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visited = set()
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depth = 0
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yield Message.Version, 1
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while True:
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extra = []
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for submission, comments in submissions:
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urls = []
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if submission:
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submission["date"] = text.parse_timestamp(
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submission["created_utc"])
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yield Message.Directory, submission
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visited.add(submission["id"])
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url = submission["url"]
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submission["num"] = 0
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if url.startswith("https://i.redd.it/"):
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text.nameext_from_url(url, submission)
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yield Message.Url, url, submission
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elif "gallery_data" in submission:
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for submission["num"], url in enumerate(
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self._extract_gallery(submission), 1):
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text.nameext_from_url(url, submission)
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yield Message.Url, url, submission
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elif submission["is_video"]:
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if videos:
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text.nameext_from_url(url, submission)
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if videos == "ytdl":
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url = "https://www.reddit.com" + \
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submission["permalink"]
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else:
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submission["_ytdl_extra"] = {
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"title": submission["title"],
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}
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yield Message.Url, "ytdl:" + url, submission
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elif not submission["is_self"]:
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urls.append((url, submission))
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elif parentdir:
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yield Message.Directory, comments[0]
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if self.api.comments:
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if submission:
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for url in text.extract_iter(
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submission["selftext_html"] or "",
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' href="', '"'):
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urls.append((url, submission))
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for comment in comments:
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for url in text.extract_iter(
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comment["body_html"] or "", ' href="', '"'):
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urls.append((url, comment))
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for url, data in urls:
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if not url or url[0] == "#":
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continue
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if url[0] == "/":
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url = "https://www.reddit.com" + url
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match = match_submission(url)
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if match:
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extra.append(match.group(1))
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elif not match_user(url) and not match_subreddit(url):
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yield Message.Queue, text.unescape(url), data
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if not extra or depth == self.max_depth:
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return
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depth += 1
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submissions = (
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self.api.submission(sid) for sid in extra
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if sid not in visited
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)
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def submissions(self):
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"""Return an iterable containing all (submission, comments) tuples"""
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def _extract_gallery(self, submission):
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if submission["gallery_data"] is None:
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self.log.warning("gallery %s: deleted", submission["id"])
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return
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meta = submission["media_metadata"]
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for item in submission["gallery_data"]["items"]:
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data = meta[item["media_id"]]
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if data["status"] != "valid" or "s" not in data:
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self.log.warning(
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"gallery %s: skipping item %s ('status: %s')",
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submission["id"], item["media_id"], data.get("status"))
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continue
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src = data["s"]
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url = src.get("u") or src.get("gif") or src.get("mp4")
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if url:
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yield url.partition("?")[0].replace("/preview.", "/i.", 1)
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else:
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self.log.error(
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"gallery %s: unable to fetch download URL for item %s",
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submission["id"], item["media_id"])
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self.log.debug(src)
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class RedditSubredditExtractor(RedditExtractor):
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"""Extractor for URLs from subreddits on reddit.com"""
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subcategory = "subreddit"
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pattern = (r"(?:https?://)?(?:\w+\.)?reddit\.com/r/"
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r"([^/?#]+(?:/[a-z]+)?)/?(?:\?([^#]*))?(?:$|#)")
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test = (
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("https://www.reddit.com/r/lavaporn/", {
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"range": "1-20",
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"count": ">= 20",
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}),
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("https://www.reddit.com/r/lavaporn/top/?sort=top&t=month"),
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("https://old.reddit.com/r/lavaporn/"),
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("https://np.reddit.com/r/lavaporn/"),
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("https://m.reddit.com/r/lavaporn/"),
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)
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def __init__(self, match):
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RedditExtractor.__init__(self, match)
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self.subreddit = match.group(1)
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self.params = text.parse_query(match.group(2))
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def submissions(self):
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return self.api.submissions_subreddit(self.subreddit, self.params)
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class RedditUserExtractor(RedditExtractor):
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"""Extractor for URLs from posts by a reddit user"""
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subcategory = "user"
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pattern = (r"(?:https?://)?(?:\w+\.)?reddit\.com/u(?:ser)?/"
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r"([^/?#]+(?:/[a-z]+)?)/?(?:\?([^#]*))?")
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test = (
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("https://www.reddit.com/user/username/", {
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"count": ">= 2",
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}),
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("https://www.reddit.com/user/username/gilded/?sort=top&t=month"),
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("https://old.reddit.com/user/username/"),
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("https://www.reddit.com/u/username/"),
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)
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def __init__(self, match):
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RedditExtractor.__init__(self, match)
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self.user = match.group(1)
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self.params = text.parse_query(match.group(2))
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def submissions(self):
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return self.api.submissions_user(self.user, self.params)
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class RedditSubmissionExtractor(RedditExtractor):
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"""Extractor for URLs from a submission on reddit.com"""
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subcategory = "submission"
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pattern = (r"(?:https?://)?(?:"
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r"(?:\w+\.)?reddit\.com/(?:r/[^/?#]+/comments|gallery)"
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r"|redd\.it)/([a-z0-9]+)")
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test = (
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("https://www.reddit.com/r/lavaporn/comments/8cqhub/", {
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"pattern": r"https://c2.staticflickr.com/8/7272/\w+_k.jpg",
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"count": 1,
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}),
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("https://www.reddit.com/r/lavaporn/comments/8cqhub/", {
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"options": (("comments", 500),),
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"pattern": r"https://",
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"count": 3,
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}),
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("https://www.reddit.com/gallery/hrrh23", {
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"url": "25b91ede15459470274dd17291424b037ed8b0ae",
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"content": "1e7dde4ee7d5f4c4b45749abfd15b2dbfa27df3f",
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"count": 3,
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}),
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# deleted gallery (#953)
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("https://www.reddit.com/gallery/icfgzv", {
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"count": 0,
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}),
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# animated gallery items (#955)
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("https://www.reddit.com/r/araragi/comments/ib32hm", {
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"pattern": r"https://i\.redd\.it/\w+\.gif",
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"count": 2,
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}),
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# "failed" gallery item (#1127)
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("https://www.reddit.com/r/cosplay/comments/jvwaqr", {
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"count": 1,
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}),
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("https://old.reddit.com/r/lavaporn/comments/2a00np/"),
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("https://np.reddit.com/r/lavaporn/comments/2a00np/"),
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("https://m.reddit.com/r/lavaporn/comments/2a00np/"),
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("https://redd.it/2a00np/"),
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)
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def __init__(self, match):
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RedditExtractor.__init__(self, match)
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self.submission_id = match.group(1)
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def submissions(self):
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return (self.api.submission(self.submission_id),)
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class RedditImageExtractor(Extractor):
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"""Extractor for reddit-hosted images"""
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category = "reddit"
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subcategory = "image"
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archive_fmt = "{filename}"
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pattern = (r"(?:https?://)?i\.redd(?:\.it|ituploads\.com)"
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r"/[^/?#]+(?:\?[^#]*)?")
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test = (
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("https://i.redd.it/upjtjcx2npzz.jpg", {
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"url": "0de614900feef103e580b632190458c0b62b641a",
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"content": "cc9a68cf286708d5ce23c68e79cd9cf7826db6a3",
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}),
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(("https://i.reddituploads.com/0f44f1b1fca2461f957c713d9592617d"
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"?fit=max&h=1536&w=1536&s=e96ce7846b3c8e1f921d2ce2671fb5e2"), {
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"url": "f24f25efcedaddeec802e46c60d77ef975dc52a5",
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"content": "541dbcc3ad77aa01ee21ca49843c5e382371fae7",
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}),
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)
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def items(self):
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data = text.nameext_from_url(self.url)
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yield Message.Version, 1
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yield Message.Directory, data
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yield Message.Url, self.url, data
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class RedditAPI():
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"""Minimal interface for the reddit API"""
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CLIENT_ID = "6N9uN0krSDE-ig"
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USER_AGENT = "Python:gallery-dl:0.8.4 (by /u/mikf1)"
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def __init__(self, extractor):
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self.extractor = extractor
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self.comments = text.parse_int(extractor.config("comments", 0))
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self.morecomments = extractor.config("morecomments", False)
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self.log = extractor.log
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client_id = extractor.config("client-id", self.CLIENT_ID)
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user_agent = extractor.config("user-agent", self.USER_AGENT)
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if (client_id == self.CLIENT_ID) ^ (user_agent == self.USER_AGENT):
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raise exception.StopExtraction(
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"Conflicting values for 'client-id' and 'user-agent': "
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"overwrite either both or none of them.")
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self.client_id = client_id
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self.headers = {"User-Agent": user_agent}
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token = extractor.config("refresh-token")
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if token is None or token == "cache":
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key = "#" + self.client_id
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self.refresh_token = _refresh_token_cache(key)
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else:
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self.refresh_token = token
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def submission(self, submission_id):
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"""Fetch the (submission, comments)=-tuple for a submission id"""
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endpoint = "/comments/" + submission_id + "/.json"
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link_id = "t3_" + submission_id if self.morecomments else None
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submission, comments = self._call(endpoint, {"limit": self.comments})
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return (submission["data"]["children"][0]["data"],
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self._flatten(comments, link_id) if self.comments else ())
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def submissions_subreddit(self, subreddit, params):
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"""Collect all (submission, comments)-tuples of a subreddit"""
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endpoint = "/r/" + subreddit + "/.json"
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params["limit"] = 100
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return self._pagination(endpoint, params)
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def submissions_user(self, user, params):
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"""Collect all (submission, comments)-tuples posted by a user"""
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endpoint = "/user/" + user + "/.json"
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params["limit"] = 100
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return self._pagination(endpoint, params)
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def morechildren(self, link_id, children):
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"""Load additional comments from a submission"""
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endpoint = "/api/morechildren"
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params = {"link_id": link_id, "api_type": "json"}
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index, done = 0, False
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while not done:
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if len(children) - index < 100:
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done = True
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params["children"] = ",".join(children[index:index + 100])
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index += 100
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data = self._call(endpoint, params)["json"]
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for thing in data["data"]["things"]:
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if thing["kind"] == "more":
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children.extend(thing["data"]["children"])
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else:
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yield thing["data"]
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def authenticate(self):
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"""Authenticate the application by requesting an access token"""
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self.headers["Authorization"] = \
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self._authenticate_impl(self.refresh_token)
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@cache(maxage=3600, keyarg=1)
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def _authenticate_impl(self, refresh_token=None):
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"""Actual authenticate implementation"""
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url = "https://www.reddit.com/api/v1/access_token"
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self.headers["Authorization"] = None
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if refresh_token:
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self.log.info("Refreshing private access token")
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data = {"grant_type": "refresh_token",
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"refresh_token": refresh_token}
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else:
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self.log.info("Requesting public access token")
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data = {"grant_type": ("https://oauth.reddit.com/"
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"grants/installed_client"),
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"device_id": "DO_NOT_TRACK_THIS_DEVICE"}
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response = self.extractor.request(
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url, method="POST", headers=self.headers,
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data=data, auth=(self.client_id, ""), fatal=False)
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data = response.json()
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if response.status_code != 200:
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self.log.debug("Server response: %s", data)
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raise exception.AuthenticationError('"{}: {}"'.format(
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data.get("error"), data.get("message")))
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return "Bearer " + data["access_token"]
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def _call(self, endpoint, params):
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url = "https://oauth.reddit.com" + endpoint
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params["raw_json"] = "1"
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self.authenticate()
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response = self.extractor.request(
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url, params=params, headers=self.headers, fatal=None)
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remaining = response.headers.get("x-ratelimit-remaining")
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if remaining and float(remaining) < 2:
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self.extractor.wait(seconds=response.headers["x-ratelimit-reset"])
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return self._call(endpoint, params)
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try:
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data = response.json()
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except ValueError:
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raise exception.StopExtraction(text.remove_html(response.text))
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if "error" in data:
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if data["error"] == 403:
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raise exception.AuthorizationError()
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if data["error"] == 404:
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raise exception.NotFoundError()
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self.log.debug(data)
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raise exception.StopExtraction(data.get("message"))
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return data
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def _pagination(self, endpoint, params):
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id_min = self._parse_id("id-min", 0)
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id_max = self._parse_id("id-max", 2147483647)
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date_min, date_max = self.extractor._get_date_min_max(0, 253402210800)
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while True:
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data = self._call(endpoint, params)["data"]
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for child in data["children"]:
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kind = child["kind"]
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post = child["data"]
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if (date_min <= post["created_utc"] <= date_max and
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id_min <= self._decode(post["id"]) <= id_max):
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if kind == "t3":
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if post["num_comments"] and self.comments:
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try:
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yield self.submission(post["id"])
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except exception.AuthorizationError:
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pass
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else:
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yield post, ()
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elif kind == "t1" and self.comments:
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yield None, (post,)
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if not data["after"]:
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return
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params["after"] = data["after"]
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def _flatten(self, comments, link_id=None):
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extra = []
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queue = comments["data"]["children"]
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while queue:
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comment = queue.pop(0)
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if comment["kind"] == "more":
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if link_id:
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extra.extend(comment["data"]["children"])
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continue
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comment = comment["data"]
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yield comment
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if comment["replies"]:
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queue += comment["replies"]["data"]["children"]
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if link_id and extra:
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yield from self.morechildren(link_id, extra)
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def _parse_id(self, key, default):
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sid = self.extractor.config(key)
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return self._decode(sid.rpartition("_")[2].lower()) if sid else default
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@staticmethod
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def _decode(sid):
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return util.bdecode(sid, "0123456789abcdefghijklmnopqrstuvwxyz")
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@cache(maxage=100*365*24*3600, keyarg=0)
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def _refresh_token_cache(token):
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if token and token[0] == "#":
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return None
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return token
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