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mirror of https://github.com/mikf/gallery-dl.git synced 2024-11-24 03:32:33 +01:00
gallery-dl/gallery_dl/extractor/common.py
Mike Fährmann cf5fa75d4c
add 'browser' option (#1117)
- change default user agent to Firefox ESR 78 on Windows 10
- remove 'ciphers' option
2021-02-26 13:41:27 +01:00

677 lines
23 KiB
Python

# -*- coding: utf-8 -*-
# Copyright 2014-2021 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.
"""Common classes and constants used by extractor modules."""
import re
import ssl
import time
import netrc
import queue
import logging
import datetime
import requests
import threading
from requests.adapters import HTTPAdapter
from .message import Message
from .. import config, text, util, exception
class Extractor():
category = ""
subcategory = ""
basecategory = ""
categorytransfer = False
directory_fmt = ("{category}",)
filename_fmt = "{filename}.{extension}"
archive_fmt = ""
cookiedomain = ""
root = ""
test = None
request_interval = 0.0
request_interval_min = 0.0
request_timestamp = 0.0
def __init__(self, match):
self.session = requests.Session()
self.session.headers.clear()
self.log = logging.getLogger(self.category)
self.url = match.string
self._cookiefile = None
self._cookiejar = self.session.cookies
self._parentdir = ""
self._cfgpath = ("extractor", self.category, self.subcategory)
self._write_pages = self.config("write-pages", False)
self._retries = self.config("retries", 4)
self._timeout = self.config("timeout", 30)
self._verify = self.config("verify", True)
self.request_interval = self.config(
"sleep-request", self.request_interval)
if self._retries < 0:
self._retries = float("inf")
if self.request_interval < self.request_interval_min:
self.request_interval = self.request_interval_min
if self.basecategory:
self.config = self._config_shared
self.config_accumulate = self._config_shared_accumulate
browser = self.config("browser")
if browser:
self._emulate_browser(browser)
else:
self._init_headers()
self._init_cookies()
self._init_proxies()
@classmethod
def from_url(cls, url):
if isinstance(cls.pattern, str):
cls.pattern = re.compile(cls.pattern)
match = cls.pattern.match(url)
return cls(match) if match else None
def __iter__(self):
return self.items()
def items(self):
yield Message.Version, 1
def skip(self, num):
return 0
def config(self, key, default=None):
return config.interpolate(self._cfgpath, key, default)
def config_accumulate(self, key):
return config.accumulate(self._cfgpath, key)
def _config_shared(self, key, default=None):
return config.interpolate_common(("extractor",), (
(self.category, self.subcategory),
(self.basecategory, self.subcategory),
), key, default)
def _config_shared_accumulate(self, key):
values = config.accumulate(self._cfgpath, key)
conf = config.get(("extractor",), self.basecategory)
if conf:
values[:0] = config.accumulate((self.subcategory,), key, conf=conf)
return values
def request(self, url, *, method="GET", session=None, retries=None,
encoding=None, fatal=True, notfound=None, **kwargs):
tries = 1
retries = self._retries if retries is None else retries
session = self.session if session is None else session
kwargs.setdefault("timeout", self._timeout)
kwargs.setdefault("verify", self._verify)
response = None
if self.request_interval:
seconds = (self.request_interval -
(time.time() - Extractor.request_timestamp))
if seconds > 0.0:
self.log.debug("Sleeping for %.5s seconds", seconds)
time.sleep(seconds)
while True:
try:
response = session.request(method, url, **kwargs)
except (requests.exceptions.ConnectionError,
requests.exceptions.Timeout,
requests.exceptions.ChunkedEncodingError,
requests.exceptions.ContentDecodingError) as exc:
msg = exc
except (requests.exceptions.RequestException) as exc:
raise exception.HttpError(exc)
else:
code = response.status_code
if self._write_pages:
self._dump_response(response)
if 200 <= code < 400 or fatal is None and \
(400 <= code < 500) or not fatal and \
(400 <= code < 429 or 431 <= code < 500):
if encoding:
response.encoding = encoding
return response
if notfound and code == 404:
raise exception.NotFoundError(notfound)
msg = "'{} {}' for '{}'".format(code, response.reason, url)
server = response.headers.get("Server")
if server and server.startswith("cloudflare"):
if code == 503 and \
b"jschl-answer" in response.content:
self.log.warning("Cloudflare IUAM challenge")
break
if code == 403 and \
b'name="captcha-bypass"' in response.content:
self.log.warning("Cloudflare CAPTCHA")
break
if code < 500 and code != 429 and code != 430:
break
finally:
Extractor.request_timestamp = time.time()
self.log.debug("%s (%s/%s)", msg, tries, retries+1)
if tries > retries:
break
time.sleep(max(tries, self.request_interval))
tries += 1
raise exception.HttpError(msg, response)
def wait(self, *, seconds=None, until=None, adjust=1.0,
reason="rate limit reset"):
now = time.time()
if seconds:
seconds = float(seconds)
until = now + seconds
elif until:
if isinstance(until, datetime.datetime):
# convert to UTC timestamp
epoch = datetime.datetime(1970, 1, 1)
until = (until - epoch) / datetime.timedelta(0, 1)
else:
until = float(until)
seconds = until - now
else:
raise ValueError("Either 'seconds' or 'until' is required")
seconds += adjust
if seconds <= 0.0:
return
if reason:
t = datetime.datetime.fromtimestamp(until).time()
isotime = "{:02}:{:02}:{:02}".format(t.hour, t.minute, t.second)
self.log.info("Waiting until %s for %s.", isotime, reason)
time.sleep(seconds)
def _get_auth_info(self):
"""Return authentication information as (username, password) tuple"""
username = self.config("username")
password = None
if username:
password = self.config("password")
elif self.config("netrc", False):
try:
info = netrc.netrc().authenticators(self.category)
username, _, password = info
except (OSError, netrc.NetrcParseError) as exc:
self.log.error("netrc: %s", exc)
except TypeError:
self.log.warning("netrc: No authentication info")
return username, password
def _emulate_browser(self, browser):
browser, _, platform = browser.lower().partition(":")
if not platform or platform == "auto":
platform = "windows" if util.WINDOWS else "linux"
if platform == "windows":
platform = "Windows NT 10.0; Win64; x64"
elif platform == "linux":
platform = "X11; Linux x86_64"
elif platform == "macos":
platform = "Macintosh; Intel Mac OS X 11.2"
if browser == "chrome":
_emulate_browser_chrome(self.session, platform)
else:
_emulate_browser_firefox(self.session, platform)
def _init_headers(self):
"""Initialize HTTP headers for 'session'"""
headers = self.session.headers
headers["User-Agent"] = self.config(
"user-agent", ("Mozilla/5.0 (Windows NT 10.0; Win64; x64; "
"rv:78.0) Gecko/20100101 Firefox/78.0"))
headers["Accept"] = "*/*"
headers["Accept-Language"] = "en-US,en;q=0.5"
headers["Accept-Encoding"] = "gzip, deflate"
def _init_proxies(self):
"""Update the session's proxy map"""
proxies = self.config("proxy")
if proxies:
if isinstance(proxies, str):
proxies = {"http": proxies, "https": proxies}
if isinstance(proxies, dict):
for scheme, proxy in proxies.items():
if "://" not in proxy:
proxies[scheme] = "http://" + proxy.lstrip("/")
self.session.proxies = proxies
else:
self.log.warning("invalid proxy specifier: %s", proxies)
def _init_cookies(self):
"""Populate the session's cookiejar"""
if self.cookiedomain is None:
return
cookies = self.config("cookies")
if cookies:
if isinstance(cookies, dict):
self._update_cookies_dict(cookies, self.cookiedomain)
elif isinstance(cookies, str):
cookiefile = util.expand_path(cookies)
try:
with open(cookiefile) as fp:
cookies = util.load_cookiestxt(fp)
except Exception as exc:
self.log.warning("cookies: %s", exc)
else:
self._update_cookies(cookies)
self._cookiefile = cookiefile
else:
self.log.warning(
"expected 'dict' or 'str' value for 'cookies' option, "
"got '%s' (%s)", cookies.__class__.__name__, cookies)
def _store_cookies(self):
"""Store the session's cookiejar in a cookies.txt file"""
if self._cookiefile and self.config("cookies-update", True):
try:
with open(self._cookiefile, "w") as fp:
util.save_cookiestxt(fp, self._cookiejar)
except OSError as exc:
self.log.warning("cookies: %s", exc)
def _update_cookies(self, cookies, *, domain=""):
"""Update the session's cookiejar with 'cookies'"""
if isinstance(cookies, dict):
self._update_cookies_dict(cookies, domain or self.cookiedomain)
else:
setcookie = self._cookiejar.set_cookie
try:
cookies = iter(cookies)
except TypeError:
setcookie(cookies)
else:
for cookie in cookies:
setcookie(cookie)
def _update_cookies_dict(self, cookiedict, domain):
"""Update cookiejar with name-value pairs from a dict"""
setcookie = self._cookiejar.set
for name, value in cookiedict.items():
setcookie(name, value, domain=domain)
def _check_cookies(self, cookienames, *, domain=None):
"""Check if all 'cookienames' are in the session's cookiejar"""
if not self._cookiejar:
return False
if domain is None:
domain = self.cookiedomain
names = set(cookienames)
now = time.time()
for cookie in self._cookiejar:
if cookie.name in names and cookie.domain == domain:
if cookie.expires and cookie.expires < now:
self.log.warning("Cookie '%s' has expired", cookie.name)
else:
names.discard(cookie.name)
if not names:
return True
return False
def _get_date_min_max(self, dmin=None, dmax=None):
"""Retrieve and parse 'date-min' and 'date-max' config values"""
def get(key, default):
ts = self.config(key, default)
if isinstance(ts, str):
try:
ts = int(datetime.datetime.strptime(ts, fmt).timestamp())
except ValueError as exc:
self.log.warning("Unable to parse '%s': %s", key, exc)
ts = default
return ts
fmt = self.config("date-format", "%Y-%m-%dT%H:%M:%S")
return get("date-min", dmin), get("date-max", dmax)
def _dispatch_extractors(self, extractor_data, default=()):
""" """
extractors = {
data[0].subcategory: data
for data in extractor_data
}
include = self.config("include", default) or ()
if include == "all":
include = extractors
elif isinstance(include, str):
include = include.split(",")
result = [(Message.Version, 1)]
for category in include:
if category in extractors:
extr, url = extractors[category]
result.append((Message.Queue, url, {"_extractor": extr}))
return iter(result)
@classmethod
def _get_tests(cls):
"""Yield an extractor's test cases as (URL, RESULTS) tuples"""
tests = cls.test
if not tests:
return
if len(tests) == 2 and (not tests[1] or isinstance(tests[1], dict)):
tests = (tests,)
for test in tests:
if isinstance(test, str):
test = (test, None)
yield test
def _dump_response(self, response, history=True):
"""Write the response content to a .dump file in the current directory.
The file name is derived from the response url,
replacing special characters with "_"
"""
if history:
for resp in response.history:
self._dump_response(resp, False)
if hasattr(Extractor, "_dump_index"):
Extractor._dump_index += 1
else:
Extractor._dump_index = 1
Extractor._dump_sanitize = re.compile(r"[\\\\|/<>:\"?*&=#]+").sub
fname = "{:>02}_{}".format(
Extractor._dump_index,
Extractor._dump_sanitize('_', response.url)
)[:250]
try:
with open(fname + ".dump", 'wb') as fp:
util.dump_response(
response, fp, headers=(self._write_pages == "all"))
except Exception as e:
self.log.warning("Failed to dump HTTP request (%s: %s)",
e.__class__.__name__, e)
class GalleryExtractor(Extractor):
subcategory = "gallery"
filename_fmt = "{category}_{gallery_id}_{num:>03}.{extension}"
directory_fmt = ("{category}", "{gallery_id} {title}")
archive_fmt = "{gallery_id}_{num}"
enum = "num"
def __init__(self, match, url=None):
Extractor.__init__(self, match)
self.gallery_url = self.root + match.group(1) if url is None else url
def items(self):
self.login()
page = self.request(self.gallery_url, notfound=self.subcategory).text
data = self.metadata(page)
imgs = self.images(page)
if "count" in data:
images = zip(
range(1, data["count"]+1),
imgs,
)
else:
try:
data["count"] = len(imgs)
except TypeError:
pass
images = enumerate(imgs, 1)
yield Message.Version, 1
yield Message.Directory, data
for data[self.enum], (url, imgdata) in images:
if imgdata:
data.update(imgdata)
if "extension" not in imgdata:
text.nameext_from_url(url, data)
else:
text.nameext_from_url(url, data)
yield Message.Url, url, data
def login(self):
"""Login and set necessary cookies"""
def metadata(self, page):
"""Return a dict with general metadata"""
def images(self, page):
"""Return a list of all (image-url, metadata)-tuples"""
class ChapterExtractor(GalleryExtractor):
subcategory = "chapter"
directory_fmt = (
"{category}", "{manga}",
"{volume:?v/ />02}c{chapter:>03}{chapter_minor:?//}{title:?: //}")
filename_fmt = (
"{manga}_c{chapter:>03}{chapter_minor:?//}_{page:>03}.{extension}")
archive_fmt = (
"{manga}_{chapter}{chapter_minor}_{page}")
enum = "page"
class MangaExtractor(Extractor):
subcategory = "manga"
categorytransfer = True
chapterclass = None
reverse = True
def __init__(self, match, url=None):
Extractor.__init__(self, match)
self.manga_url = url or self.root + match.group(1)
if self.config("chapter-reverse", False):
self.reverse = not self.reverse
def items(self):
self.login()
page = self.request(self.manga_url).text
chapters = self.chapters(page)
if self.reverse:
chapters.reverse()
yield Message.Version, 1
for chapter, data in chapters:
data["_extractor"] = self.chapterclass
yield Message.Queue, chapter, data
def login(self):
"""Login and set necessary cookies"""
def chapters(self, page):
"""Return a list of all (chapter-url, metadata)-tuples"""
class AsynchronousMixin():
"""Run info extraction in a separate thread"""
def __iter__(self):
messages = queue.Queue(5)
thread = threading.Thread(
target=self.async_items,
args=(messages,),
daemon=True,
)
thread.start()
while True:
msg = messages.get()
if msg is None:
thread.join()
return
if isinstance(msg, Exception):
thread.join()
raise msg
yield msg
messages.task_done()
def async_items(self, messages):
try:
for msg in self.items():
messages.put(msg)
except Exception as exc:
messages.put(exc)
messages.put(None)
class BaseExtractor(Extractor):
instances = ()
def __init__(self, match):
if not self.category:
for index, group in enumerate(match.groups()):
if group is not None:
self.category, self.root = self.instances[index]
break
Extractor.__init__(self, match)
@classmethod
def update(cls, instances):
extra_instances = config.get(("extractor",), cls.basecategory)
if extra_instances:
for category, info in extra_instances.items():
if isinstance(info, dict) and "root" in info:
instances[category] = info
pattern_list = []
instance_list = cls.instances = []
for category, info in instances.items():
root = info["root"].rstrip("/")
instance_list.append((category, root))
pattern = info.get("pattern")
if not pattern:
pattern = re.escape(root[root.index(":") + 3:])
pattern_list.append(pattern + "()")
return r"(?:https?://)?(?:" + "|".join(pattern_list) + r")"
class HTTPSAdapter(HTTPAdapter):
def __init__(self, ciphers):
context = self.ssl_context = ssl.create_default_context()
context.options |= (ssl.OP_NO_SSLv2 | ssl.OP_NO_SSLv3 |
ssl.OP_NO_TLSv1 | ssl.OP_NO_TLSv1_1)
context.set_ecdh_curve("prime256v1")
context.set_ciphers(ciphers)
HTTPAdapter.__init__(self)
def init_poolmanager(self, *args, **kwargs):
kwargs["ssl_context"] = self.ssl_context
return HTTPAdapter.init_poolmanager(self, *args, **kwargs)
def proxy_manager_for(self, *args, **kwargs):
kwargs["ssl_context"] = self.ssl_context
return HTTPAdapter.proxy_manager_for(self, *args, **kwargs)
def _emulate_browser_firefox(session, platform):
headers = session.headers
headers["User-Agent"] = ("Mozilla/5.0 (" + platform + "; rv:78.0) "
"Gecko/20100101 Firefox/78.0")
headers["Accept"] = ("text/html,application/xhtml+xml,"
"application/xml;q=0.9,image/webp,*/*;q=0.8")
headers["Accept-Language"] = "en-US,en;q=0.5"
headers["Accept-Encoding"] = "gzip, deflate"
headers["Referer"] = None
headers["Upgrade-Insecure-Requests"] = "1"
headers["Cookie"] = None
session.mount("https://", HTTPSAdapter(
"TLS_AES_128_GCM_SHA256:"
"TLS_CHACHA20_POLY1305_SHA256:"
"TLS_AES_256_GCM_SHA384:"
"ECDHE-ECDSA-AES128-GCM-SHA256:"
"ECDHE-RSA-AES128-GCM-SHA256:"
"ECDHE-ECDSA-CHACHA20-POLY1305:"
"ECDHE-RSA-CHACHA20-POLY1305:"
"ECDHE-ECDSA-AES256-GCM-SHA384:"
"ECDHE-RSA-AES256-GCM-SHA384:"
"ECDHE-ECDSA-AES256-SHA:"
"ECDHE-ECDSA-AES128-SHA:"
"ECDHE-RSA-AES128-SHA:"
"ECDHE-RSA-AES256-SHA:"
"DHE-RSA-AES128-SHA:"
"DHE-RSA-AES256-SHA:"
"AES128-SHA:"
"AES256-SHA:"
"DES-CBC3-SHA"
))
def _emulate_browser_chrome(session, platform):
headers = session.headers
if platform.startswith("Macintosh"):
platform = platform.replace(".", "_") + "_0"
headers["Upgrade-Insecure-Requests"] = "1"
headers["User-Agent"] = (
"Mozilla/5.0 (" + platform + ") AppleWebKit/537.36 "
"(KHTML, like Gecko) Chrome/88.0.4324.190 Safari/537.36")
headers["Accept"] = ("text/html,application/xhtml+xml,application/xml;"
"q=0.9,image/webp,image/apng,*/*;q=0.8")
headers["Referer"] = None
headers["Accept-Encoding"] = "gzip, deflate"
headers["Accept-Language"] = "en-US,en;q=0.9"
headers["Cookie"] = None
session.mount("https://", HTTPSAdapter(
"TLS_AES_128_GCM_SHA256:"
"TLS_AES_256_GCM_SHA384:"
"TLS_CHACHA20_POLY1305_SHA256:"
"ECDHE-ECDSA-AES128-GCM-SHA256:"
"ECDHE-RSA-AES128-GCM-SHA256:"
"ECDHE-ECDSA-AES256-GCM-SHA384:"
"ECDHE-RSA-AES256-GCM-SHA384:"
"ECDHE-ECDSA-CHACHA20-POLY1305:"
"ECDHE-RSA-CHACHA20-POLY1305:"
"ECDHE-RSA-AES128-SHA:"
"ECDHE-RSA-AES256-SHA:"
"AES128-GCM-SHA256:"
"AES256-GCM-SHA384:"
"AES128-SHA:"
"AES256-SHA:"
"DES-CBC3-SHA"
))
# Undo automatic pyOpenSSL injection by requests
pyopenssl = config.get((), "pyopenssl", False)
if not pyopenssl:
try:
from requests.packages.urllib3.contrib import pyopenssl # noqa
pyopenssl.extract_from_urllib3()
except ImportError:
pass
del pyopenssl