mirror of
https://github.com/mikf/gallery-dl.git
synced 2024-11-22 18:53:21 +01:00
522 lines
17 KiB
Python
522 lines
17 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2015-2019 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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import sys
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import time
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import logging
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from . import extractor, downloader, postprocessor
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from . import config, text, util, output, exception
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from .extractor.message import Message
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class Job():
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"""Base class for Job-types"""
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ulog = None
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def __init__(self, extr, parent=None):
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if isinstance(extr, str):
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extr = extractor.find(extr)
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if not extr:
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raise exception.NoExtractorError()
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self.extractor = extr
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extr.log.extractor = extr
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extr.log.job = self
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extr.log.debug("Using %s for '%s'", extr.__class__.__name__, extr.url)
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self.pred_url = self._prepare_predicates("image", True)
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self.pred_queue = self._prepare_predicates("chapter", False)
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if parent and parent.extractor.config(
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"category-transfer", parent.extractor.categorytransfer):
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self.extractor.category = parent.extractor.category
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self.extractor.subcategory = parent.extractor.subcategory
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# user-supplied metadata
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self.userkwds = self.extractor.config("keywords")
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def run(self):
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"""Execute or run the job"""
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try:
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log = self.extractor.log
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for msg in self.extractor:
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self.dispatch(msg)
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except exception.AuthenticationError as exc:
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msg = str(exc) or "Please provide a valid username/password pair."
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log.error("Authentication failed: %s", msg)
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except exception.AuthorizationError:
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log.error("You do not have permission to access the resource "
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"at '%s'", self.extractor.url)
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except exception.NotFoundError as exc:
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res = str(exc) or "resource (gallery/image/user)"
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log.error("The %s at '%s' does not exist", res, self.extractor.url)
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except exception.HttpError as exc:
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err = exc.args[0]
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if isinstance(err, Exception):
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err = "{}: {}".format(err.__class__.__name__, err)
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log.error("HTTP request failed: %s", err)
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except exception.FormatError as exc:
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err, obj = exc.args
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log.error("Applying %s format string failed: %s: %s",
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obj, err.__class__.__name__, err)
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except exception.FilterError as exc:
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err = exc.args[0]
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log.error("Evaluating filter expression failed: %s: %s",
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err.__class__.__name__, err)
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except exception.StopExtraction:
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pass
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except OSError as exc:
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log.error("Unable to download data: %s: %s",
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exc.__class__.__name__, exc)
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log.debug("", exc_info=True)
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except Exception as exc:
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log.error(("An unexpected error occurred: %s - %s. "
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"Please run gallery-dl again with the --verbose flag, "
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"copy its output and report this issue on "
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"https://github.com/mikf/gallery-dl/issues ."),
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exc.__class__.__name__, exc)
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log.debug("", exc_info=True)
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finally:
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self.handle_finalize()
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def dispatch(self, msg):
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"""Call the appropriate message handler"""
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if msg[0] == Message.Url:
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_, url, kwds = msg
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if self.pred_url(url, kwds):
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self.update_kwdict(kwds)
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self.handle_url(url, kwds)
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elif msg[0] == Message.Directory:
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self.update_kwdict(msg[1])
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self.handle_directory(msg[1])
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elif msg[0] == Message.Queue:
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_, url, kwds = msg
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if self.pred_queue(url, kwds):
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self.handle_queue(url, kwds)
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elif msg[0] == Message.Urllist:
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_, urls, kwds = msg
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if self.pred_url(urls[0], kwds):
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self.update_kwdict(kwds)
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self.handle_urllist(urls, kwds)
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elif msg[0] == Message.Version:
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if msg[1] != 1:
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raise "unsupported message-version ({}, {})".format(
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self.extractor.category, msg[1]
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)
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# TODO: support for multiple message versions
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def handle_url(self, url, keywords):
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"""Handle Message.Url"""
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def handle_urllist(self, urls, keywords):
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"""Handle Message.Urllist"""
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self.handle_url(urls[0], keywords)
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def handle_directory(self, keywords):
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"""Handle Message.Directory"""
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def handle_queue(self, url, keywords):
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"""Handle Message.Queue"""
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def handle_finalize(self):
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"""Handle job finalization"""
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def update_kwdict(self, kwdict):
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"""Update 'kwdict' with additional metadata"""
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kwdict["category"] = self.extractor.category
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kwdict["subcategory"] = self.extractor.subcategory
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if self.userkwds:
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kwdict.update(self.userkwds)
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def _prepare_predicates(self, target, skip=True):
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predicates = []
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if self.extractor.config(target + "-unique"):
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predicates.append(util.UniquePredicate())
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pfilter = self.extractor.config(target + "-filter")
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if pfilter:
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try:
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pred = util.FilterPredicate(pfilter, target)
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except (SyntaxError, ValueError, TypeError) as exc:
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self.extractor.log.warning(exc)
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else:
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predicates.append(pred)
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prange = self.extractor.config(target + "-range")
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if prange:
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try:
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pred = util.RangePredicate(prange)
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except ValueError as exc:
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self.extractor.log.warning(
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"invalid %s range: %s", target, exc)
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else:
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if skip and pred.lower > 1 and not pfilter:
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pred.index += self.extractor.skip(pred.lower - 1)
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predicates.append(pred)
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return util.build_predicate(predicates)
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def _write_unsupported(self, url):
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if self.ulog:
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self.ulog.info(url)
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@staticmethod
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def _filter(kwdict):
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"""Return a copy of 'kwdict' without "private" entries"""
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return {k: v for k, v in kwdict.items() if k[0] != "_"}
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class DownloadJob(Job):
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"""Download images into appropriate directory/filename locations"""
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def __init__(self, url, parent=None):
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Job.__init__(self, url, parent)
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self.log = logging.getLogger("download")
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self.pathfmt = None
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self.archive = None
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self.sleep = None
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self.downloaders = {}
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self.postprocessors = None
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self.out = output.select()
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def handle_url(self, url, keywords, fallback=None):
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"""Download the resource specified in 'url'"""
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postprocessors = self.postprocessors
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pathfmt = self.pathfmt
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archive = self.archive
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# prepare download
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pathfmt.set_filename(keywords)
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if postprocessors:
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for pp in postprocessors:
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pp.prepare(pathfmt)
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if pathfmt.exists(archive):
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self.handle_skip()
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return
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if self.sleep:
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time.sleep(self.sleep)
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# download from URL
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if not self.download(url):
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# use fallback URLs if available
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for num, url in enumerate(fallback or (), 1):
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self.log.info("Trying fallback URL #%d", num)
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if self.download(url):
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break
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else:
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# download failed
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self.log.error("Failed to download %s",
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pathfmt.filename or url)
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return
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if not pathfmt.temppath:
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self.handle_skip()
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return
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# run post processors
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if postprocessors:
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for pp in postprocessors:
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pp.run(pathfmt)
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# download succeeded
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pathfmt.finalize()
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self.out.success(pathfmt.path, 0)
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if archive:
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archive.add(keywords)
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if postprocessors:
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for pp in postprocessors:
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pp.run_after(pathfmt)
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self._skipcnt = 0
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def handle_urllist(self, urls, keywords):
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"""Download the resource specified in 'url'"""
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fallback = iter(urls)
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url = next(fallback)
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self.handle_url(url, keywords, fallback)
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def handle_directory(self, keywords):
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"""Set and create the target directory for downloads"""
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if not self.pathfmt:
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self.initialize(keywords)
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else:
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self.pathfmt.set_directory(keywords)
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def handle_queue(self, url, keywords):
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if "_extractor" in keywords:
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extr = keywords["_extractor"].from_url(url)
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else:
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extr = extractor.find(url)
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if extr:
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self.__class__(extr, self).run()
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else:
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self._write_unsupported(url)
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def handle_finalize(self):
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if self.postprocessors:
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for pp in self.postprocessors:
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pp.finalize()
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if self.archive:
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self.archive.close()
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if self.pathfmt:
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self.extractor._store_cookies()
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def handle_skip(self):
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self.out.skip(self.pathfmt.path)
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if self._skipexc:
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self._skipcnt += 1
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if self._skipcnt >= self._skipmax:
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raise self._skipexc()
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def download(self, url):
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"""Download 'url'"""
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scheme = url.partition(":")[0]
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downloader = self.get_downloader(scheme)
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if downloader:
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return downloader.download(url, self.pathfmt)
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self._write_unsupported(url)
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return False
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def get_downloader(self, scheme):
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"""Return a downloader suitable for 'scheme'"""
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try:
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return self.downloaders[scheme]
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except KeyError:
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pass
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klass = downloader.find(scheme)
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if klass and config.get(("downloader", klass.scheme, "enabled"), True):
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instance = klass(self.extractor, self.out)
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else:
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instance = None
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self.log.error("'%s:' URLs are not supported/enabled", scheme)
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if klass and klass.scheme == "http":
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self.downloaders["http"] = self.downloaders["https"] = instance
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else:
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self.downloaders[scheme] = instance
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return instance
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def initialize(self, keywords=None):
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"""Delayed initialization of PathFormat, etc."""
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self.pathfmt = util.PathFormat(self.extractor)
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if keywords:
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self.pathfmt.set_directory(keywords)
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self.sleep = self.extractor.config("sleep")
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if not self.extractor.config("download", True):
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self.download = self.pathfmt.fix_extension
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skip = self.extractor.config("skip", True)
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if skip:
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self._skipexc = None
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if skip == "enumerate":
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self.pathfmt.check_file = self.pathfmt._enum_file
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elif isinstance(skip, str):
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skip, _, smax = skip.partition(":")
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if skip == "abort":
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self._skipexc = exception.StopExtraction
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elif skip == "exit":
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self._skipexc = sys.exit
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self._skipcnt = 0
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self._skipmax = text.parse_int(smax)
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else:
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self.pathfmt.exists = lambda x=None: False
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archive = self.extractor.config("archive")
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if archive:
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path = util.expand_path(archive)
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try:
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self.archive = util.DownloadArchive(path, self.extractor)
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except Exception as exc:
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self.extractor.log.warning(
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"Failed to open download archive at '%s' ('%s: %s')",
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path, exc.__class__.__name__, exc)
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else:
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self.extractor.log.debug("Using download archive '%s'", path)
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postprocessors = self.extractor.config("postprocessors")
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if postprocessors:
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pp_list = []
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for pp_dict in postprocessors:
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whitelist = pp_dict.get("whitelist")
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blacklist = pp_dict.get("blacklist")
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if (whitelist and self.extractor.category not in whitelist or
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blacklist and self.extractor.category in blacklist):
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continue
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name = pp_dict.get("name")
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pp_cls = postprocessor.find(name)
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if not pp_cls:
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postprocessor.log.warning("module '%s' not found", name)
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continue
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try:
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pp_obj = pp_cls(self.pathfmt, pp_dict)
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except Exception as exc:
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postprocessor.log.error(
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"'%s' initialization failed: %s: %s",
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name, exc.__class__.__name__, exc)
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else:
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pp_list.append(pp_obj)
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if pp_list:
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self.postprocessors = pp_list
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self.extractor.log.debug(
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"Active postprocessor modules: %s", pp_list)
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class SimulationJob(DownloadJob):
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"""Simulate the extraction process without downloading anything"""
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def handle_url(self, url, keywords, fallback=None):
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self.pathfmt.set_filename(keywords)
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self.out.skip(self.pathfmt.path)
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if self.sleep:
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time.sleep(self.sleep)
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if self.archive:
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self.archive.add(keywords)
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def handle_directory(self, keywords):
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if not self.pathfmt:
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self.initialize()
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class KeywordJob(Job):
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"""Print available keywords"""
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def handle_url(self, url, keywords):
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print("\nKeywords for filenames and --filter:")
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print("------------------------------------")
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self.print_keywords(keywords)
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raise exception.StopExtraction()
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def handle_directory(self, keywords):
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print("Keywords for directory names:")
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print("-----------------------------")
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self.print_keywords(keywords)
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def handle_queue(self, url, keywords):
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if not keywords:
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self.extractor.log.info(
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"This extractor delegates work to other extractors "
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"and does not provide any keywords on its own. Try "
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"'gallery-dl -K \"%s\"' instead.", url)
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else:
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print("Keywords for --chapter-filter:")
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print("------------------------------")
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self.print_keywords(keywords)
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if self.extractor.categorytransfer:
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print()
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KeywordJob(url, self).run()
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raise exception.StopExtraction()
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@staticmethod
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def print_keywords(keywords, prefix=""):
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"""Print key-value pairs with formatting"""
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suffix = "]" if prefix else ""
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for key, value in sorted(keywords.items()):
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if key[0] == "_":
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continue
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key = prefix + key + suffix
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if isinstance(value, dict):
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KeywordJob.print_keywords(value, key + "[")
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elif isinstance(value, list):
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if value and isinstance(value[0], dict):
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KeywordJob.print_keywords(value[0], key + "[][")
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else:
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print(key, "[]", sep="")
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for val in value:
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print(" -", val)
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else:
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# string or number
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print(key, "\n ", value, sep="")
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class UrlJob(Job):
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"""Print download urls"""
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maxdepth = 1
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def __init__(self, url, parent=None, depth=1):
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Job.__init__(self, url, parent)
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self.depth = depth
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if depth >= self.maxdepth:
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self.handle_queue = self.handle_url
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@staticmethod
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def handle_url(url, _):
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print(url)
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@staticmethod
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def handle_urllist(urls, _):
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prefix = ""
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for url in urls:
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print(prefix, url, sep="")
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prefix = "| "
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def handle_queue(self, url, _):
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try:
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UrlJob(url, self, self.depth + 1).run()
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except exception.NoExtractorError:
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self._write_unsupported(url)
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class DataJob(Job):
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"""Collect extractor results and dump them"""
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def __init__(self, url, parent=None, file=sys.stdout, ensure_ascii=True):
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Job.__init__(self, url, parent)
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self.file = file
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self.data = []
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self.ascii = config.get(("output", "ascii"), ensure_ascii)
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def run(self):
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# collect data
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try:
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for msg in self.extractor:
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self.dispatch(msg)
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except exception.StopExtraction:
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pass
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except Exception as exc:
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self.data.append((exc.__class__.__name__, str(exc)))
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except BaseException:
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pass
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# convert numbers to string
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if config.get(("output", "num-to-str"), False):
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for msg in self.data:
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util.transform_dict(msg[-1], util.number_to_string)
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# dump to 'file'
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util.dump_json(self.data, self.file, self.ascii, 2)
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def handle_url(self, url, kwdict):
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self.data.append((Message.Url, url, self._filter(kwdict)))
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def handle_urllist(self, urls, kwdict):
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self.data.append((Message.Urllist, list(urls), self._filter(kwdict)))
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def handle_directory(self, kwdict):
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self.data.append((Message.Directory, self._filter(kwdict)))
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def handle_queue(self, url, kwdict):
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self.data.append((Message.Queue, url, self._filter(kwdict)))
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def handle_finalize(self):
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self.file.close()
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