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#!/usr/bin/env python# -*- coding: utf-8 -*-
from __future__ import absolute_import
import ioimport osimport reimport shutilimport socketimport sysimport timeimport traceback
from .utils import *from .extractor import get_info_extractor, gen_extractorsfrom .FileDownloader import FileDownloader
class YoutubeDL(object): """YoutubeDL class.
YoutubeDL objects are the ones responsible of downloading the actual video file and writing it to disk if the user has requested it, among some other tasks. In most cases there should be one per program. As, given a video URL, the downloader doesn't know how to extract all the needed information, task that InfoExtractors do, it has to pass the URL to one of them.
For this, YoutubeDL objects have a method that allows InfoExtractors to be registered in a given order. When it is passed a URL, the YoutubeDL object handles it to the first InfoExtractor it finds that reports being able to handle it. The InfoExtractor extracts all the information about the video or videos the URL refers to, and YoutubeDL process the extracted information, possibly using a File Downloader to download the video.
YoutubeDL objects accept a lot of parameters. In order not to saturate the object constructor with arguments, it receives a dictionary of options instead. These options are available through the params attribute for the InfoExtractors to use. The YoutubeDL also registers itself as the downloader in charge for the InfoExtractors that are added to it, so this is a "mutual registration".
Available options:
username: Username for authentication purposes. password: Password for authentication purposes. videopassword: Password for acces a video. usenetrc: Use netrc for authentication instead. verbose: Print additional info to stdout. quiet: Do not print messages to stdout. forceurl: Force printing final URL. forcetitle: Force printing title. forceid: Force printing ID. forcethumbnail: Force printing thumbnail URL. forcedescription: Force printing description. forcefilename: Force printing final filename. simulate: Do not download the video files. format: Video format code. format_limit: Highest quality format to try. outtmpl: Template for output names. restrictfilenames: Do not allow "&" and spaces in file names ignoreerrors: Do not stop on download errors. nooverwrites: Prevent overwriting files. playliststart: Playlist item to start at. playlistend: Playlist item to end at. matchtitle: Download only matching titles. rejecttitle: Reject downloads for matching titles. logtostderr: Log messages to stderr instead of stdout. writedescription: Write the video description to a .description file writeinfojson: Write the video description to a .info.json file writethumbnail: Write the thumbnail image to a file writesubtitles: Write the video subtitles to a file writeautomaticsub: Write the automatic subtitles to a file allsubtitles: Downloads all the subtitles of the video (requires writesubtitles or writeautomaticsub) listsubtitles: Lists all available subtitles for the video subtitlesformat: Subtitle format [srt/sbv/vtt] (default=srt) subtitleslangs: List of languages of the subtitles to download keepvideo: Keep the video file after post-processing daterange: A DateRange object, download only if the upload_date is in the range. skip_download: Skip the actual download of the video file cachedir: Location of the cache files in the filesystem. None to disable filesystem cache. noplaylist: Download single video instead of a playlist if in doubt. The following parameters are not used by YoutubeDL itself, they are used by the FileDownloader: nopart, updatetime, buffersize, ratelimit, min_filesize, max_filesize, test, noresizebuffer, retries, continuedl, noprogress, consoletitle """
params = None _ies = [] _pps = [] _download_retcode = None _num_downloads = None _screen_file = None
def __init__(self, params): """Create a FileDownloader object with the given options.""" self._ies = [] self._ies_instances = {} self._pps = [] self._progress_hooks = [] self._download_retcode = 0 self._num_downloads = 0 self._screen_file = [sys.stdout, sys.stderr][params.get('logtostderr', False)]
if (sys.version_info >= (3,) and sys.platform != 'win32' and sys.getfilesystemencoding() in ['ascii', 'ANSI_X3.4-1968'] and not params['restrictfilenames']): # On Python 3, the Unicode filesystem API will throw errors (#1474) self.report_warning( u'Assuming --restrict-filenames isnce file system encoding ' u'cannot encode all charactes. ' u'Set the LC_ALL environment variable to fix this.') params['restrictfilenames'] = True
self.params = params self.fd = FileDownloader(self, self.params)
if '%(stitle)s' in self.params['outtmpl']: self.report_warning(u'%(stitle)s is deprecated. Use the %(title)s and the --restrict-filenames flag(which also secures %(uploader)s et al) instead.')
def add_info_extractor(self, ie): """Add an InfoExtractor object to the end of the list.""" self._ies.append(ie) self._ies_instances[ie.ie_key()] = ie ie.set_downloader(self)
def get_info_extractor(self, ie_key): """
Get an instance of an IE with name ie_key, it will try to get one from the _ies list, if there's no instance it will create a new one and add it to the extractor list. """
ie = self._ies_instances.get(ie_key) if ie is None: ie = get_info_extractor(ie_key)() self.add_info_extractor(ie) return ie
def add_default_info_extractors(self): """
Add the InfoExtractors returned by gen_extractors to the end of the list """
for ie in gen_extractors(): self.add_info_extractor(ie)
def add_post_processor(self, pp): """Add a PostProcessor object to the end of the chain.""" self._pps.append(pp) pp.set_downloader(self)
def to_screen(self, message, skip_eol=False): """Print message to stdout if not in quiet mode.""" if not self.params.get('quiet', False): terminator = [u'\n', u''][skip_eol] output = message + terminator write_string(output, self._screen_file)
def to_stderr(self, message): """Print message to stderr.""" assert type(message) == type(u'') output = message + u'\n' if 'b' in getattr(self._screen_file, 'mode', '') or sys.version_info[0] < 3: # Python 2 lies about the mode of sys.stdout/sys.stderr output = output.encode(preferredencoding()) sys.stderr.write(output)
def fixed_template(self): """Checks if the output template is fixed.""" return (re.search(u'(?u)%\\(.+?\\)s', self.params['outtmpl']) is None)
def trouble(self, message=None, tb=None): """Determine action to take when a download problem appears.
Depending on if the downloader has been configured to ignore download errors or not, this method may throw an exception or not when errors are found, after printing the message.
tb, if given, is additional traceback information. """
if message is not None: self.to_stderr(message) if self.params.get('verbose'): if tb is None: if sys.exc_info()[0]: # if .trouble has been called from an except block tb = u'' if hasattr(sys.exc_info()[1], 'exc_info') and sys.exc_info()[1].exc_info[0]: tb += u''.join(traceback.format_exception(*sys.exc_info()[1].exc_info)) tb += compat_str(traceback.format_exc()) else: tb_data = traceback.format_list(traceback.extract_stack()) tb = u''.join(tb_data) self.to_stderr(tb) if not self.params.get('ignoreerrors', False): if sys.exc_info()[0] and hasattr(sys.exc_info()[1], 'exc_info') and sys.exc_info()[1].exc_info[0]: exc_info = sys.exc_info()[1].exc_info else: exc_info = sys.exc_info() raise DownloadError(message, exc_info) self._download_retcode = 1
def report_warning(self, message): '''
Print the message to stderr, it will be prefixed with 'WARNING:' If stderr is a tty file the 'WARNING:' will be colored '''
if sys.stderr.isatty() and os.name != 'nt': _msg_header=u'\033[0;33mWARNING:\033[0m' else: _msg_header=u'WARNING:' warning_message=u'%s %s' % (_msg_header,message) self.to_stderr(warning_message)
def report_error(self, message, tb=None): '''
Do the same as trouble, but prefixes the message with 'ERROR:', colored in red if stderr is a tty file. '''
if sys.stderr.isatty() and os.name != 'nt': _msg_header = u'\033[0;31mERROR:\033[0m' else: _msg_header = u'ERROR:' error_message = u'%s %s' % (_msg_header, message) self.trouble(error_message, tb)
def slow_down(self, start_time, byte_counter): """Sleep if the download speed is over the rate limit.""" rate_limit = self.params.get('ratelimit', None) if rate_limit is None or byte_counter == 0: return now = time.time() elapsed = now - start_time if elapsed <= 0.0: return speed = float(byte_counter) / elapsed if speed > rate_limit: time.sleep((byte_counter - rate_limit * (now - start_time)) / rate_limit)
def report_writedescription(self, descfn): """ Report that the description file is being written """ self.to_screen(u'[info] Writing video description to: ' + descfn)
def report_writesubtitles(self, sub_filename): """ Report that the subtitles file is being written """ self.to_screen(u'[info] Writing video subtitles to: ' + sub_filename)
def report_writeinfojson(self, infofn): """ Report that the metadata file has been written """ self.to_screen(u'[info] Video description metadata as JSON to: ' + infofn)
def report_file_already_downloaded(self, file_name): """Report file has already been fully downloaded.""" try: self.to_screen(u'[download] %s has already been downloaded' % file_name) except (UnicodeEncodeError) as err: self.to_screen(u'[download] The file has already been downloaded')
def increment_downloads(self): """Increment the ordinal that assigns a number to each file.""" self._num_downloads += 1
def prepare_filename(self, info_dict): """Generate the output filename.""" try: template_dict = dict(info_dict)
template_dict['epoch'] = int(time.time()) autonumber_size = self.params.get('autonumber_size') if autonumber_size is None: autonumber_size = 5 autonumber_templ = u'%0' + str(autonumber_size) + u'd' template_dict['autonumber'] = autonumber_templ % self._num_downloads if template_dict['playlist_index'] is not None: template_dict['playlist_index'] = u'%05d' % template_dict['playlist_index']
sanitize = lambda k,v: sanitize_filename( u'NA' if v is None else compat_str(v), restricted=self.params.get('restrictfilenames'), is_id=(k==u'id')) template_dict = dict((k, sanitize(k, v)) for k,v in template_dict.items())
filename = self.params['outtmpl'] % template_dict return filename except KeyError as err: self.report_error(u'Erroneous output template') return None except ValueError as err: self.report_error(u'Error in output template: ' + str(err) + u' (encoding: ' + repr(preferredencoding()) + ')') return None
def _match_entry(self, info_dict): """ Returns None iff the file should be downloaded """
title = info_dict['title'] matchtitle = self.params.get('matchtitle', False) if matchtitle: if not re.search(matchtitle, title, re.IGNORECASE): return u'[download] "' + title + '" title did not match pattern "' + matchtitle + '"' rejecttitle = self.params.get('rejecttitle', False) if rejecttitle: if re.search(rejecttitle, title, re.IGNORECASE): return u'"' + title + '" title matched reject pattern "' + rejecttitle + '"' date = info_dict.get('upload_date', None) if date is not None: dateRange = self.params.get('daterange', DateRange()) if date not in dateRange: return u'[download] %s upload date is not in range %s' % (date_from_str(date).isoformat(), dateRange) return None def extract_info(self, url, download=True, ie_key=None, extra_info={}): '''
Returns a list with a dictionary for each video we find. If 'download', also downloads the videos. extra_info is a dict containing the extra values to add to each result '''
if ie_key: ies = [self.get_info_extractor(ie_key)] else: ies = self._ies
for ie in ies: if not ie.suitable(url): continue
if not ie.working(): self.report_warning(u'The program functionality for this site has been marked as broken, ' u'and will probably not work.')
try: ie_result = ie.extract(url) if ie_result is None: # Finished already (backwards compatibility; listformats and friends should be moved here) break if isinstance(ie_result, list): # Backwards compatibility: old IE result format for result in ie_result: result.update(extra_info) ie_result = { '_type': 'compat_list', 'entries': ie_result, } else: ie_result.update(extra_info) if 'extractor' not in ie_result: ie_result['extractor'] = ie.IE_NAME return self.process_ie_result(ie_result, download=download) except ExtractorError as de: # An error we somewhat expected self.report_error(compat_str(de), de.format_traceback()) break except Exception as e: if self.params.get('ignoreerrors', False): self.report_error(compat_str(e), tb=compat_str(traceback.format_exc())) break else: raise else: self.report_error(u'no suitable InfoExtractor: %s' % url) def process_ie_result(self, ie_result, download=True, extra_info={}): """
Take the result of the ie(may be modified) and resolve all unresolved references (URLs, playlist items).
It will also download the videos if 'download'. Returns the resolved ie_result. """
result_type = ie_result.get('_type', 'video') # If not given we suppose it's a video, support the default old system if result_type == 'video': ie_result.update(extra_info) if 'playlist' not in ie_result: # It isn't part of a playlist ie_result['playlist'] = None ie_result['playlist_index'] = None if download: self.process_info(ie_result) return ie_result elif result_type == 'url': # We have to add extra_info to the results because it may be # contained in a playlist return self.extract_info(ie_result['url'], download, ie_key=ie_result.get('ie_key'), extra_info=extra_info) elif result_type == 'playlist': # We process each entry in the playlist playlist = ie_result.get('title', None) or ie_result.get('id', None) self.to_screen(u'[download] Downloading playlist: %s' % playlist)
playlist_results = []
n_all_entries = len(ie_result['entries']) playliststart = self.params.get('playliststart', 1) - 1 playlistend = self.params.get('playlistend', -1)
if playlistend == -1: entries = ie_result['entries'][playliststart:] else: entries = ie_result['entries'][playliststart:playlistend]
n_entries = len(entries)
self.to_screen(u"[%s] playlist '%s': Collected %d video ids (downloading %d of them)" % (ie_result['extractor'], playlist, n_all_entries, n_entries))
for i,entry in enumerate(entries,1): self.to_screen(u'[download] Downloading video #%s of %s' %(i, n_entries)) extra = { 'playlist': playlist, 'playlist_index': i + playliststart, } if not 'extractor' in entry: # We set the extractor, if it's an url it will be set then to # the new extractor, but if it's already a video we must make # sure it's present: see issue #877 entry['extractor'] = ie_result['extractor'] entry_result = self.process_ie_result(entry, download=download, extra_info=extra) playlist_results.append(entry_result) ie_result['entries'] = playlist_results return ie_result elif result_type == 'compat_list': def _fixup(r): r.setdefault('extractor', ie_result['extractor']) return r ie_result['entries'] = [ self.process_ie_result(_fixup(r), download=download) for r in ie_result['entries'] ] return ie_result else: raise Exception('Invalid result type: %s' % result_type)
def process_info(self, info_dict): """Process a single resolved IE result."""
assert info_dict.get('_type', 'video') == 'video' #We increment the download the download count here to match the previous behaviour. self.increment_downloads()
info_dict['fulltitle'] = info_dict['title'] if len(info_dict['title']) > 200: info_dict['title'] = info_dict['title'][:197] + u'...'
# Keep for backwards compatibility info_dict['stitle'] = info_dict['title']
if not 'format' in info_dict: info_dict['format'] = info_dict['ext']
reason = self._match_entry(info_dict) if reason is not None: self.to_screen(u'[download] ' + reason) return
max_downloads = self.params.get('max_downloads') if max_downloads is not None: if self._num_downloads > int(max_downloads): raise MaxDownloadsReached()
filename = self.prepare_filename(info_dict)
# Forced printings if self.params.get('forcetitle', False): compat_print(info_dict['title']) if self.params.get('forceid', False): compat_print(info_dict['id']) if self.params.get('forceurl', False): # For RTMP URLs, also include the playpath compat_print(info_dict['url'] + info_dict.get('play_path', u'')) if self.params.get('forcethumbnail', False) and 'thumbnail' in info_dict: compat_print(info_dict['thumbnail']) if self.params.get('forcedescription', False) and 'description' in info_dict: compat_print(info_dict['description']) if self.params.get('forcefilename', False) and filename is not None: compat_print(filename) if self.params.get('forceformat', False): compat_print(info_dict['format'])
# Do nothing else if in simulate mode if self.params.get('simulate', False): return
if filename is None: return
try: dn = os.path.dirname(encodeFilename(filename)) if dn != '' and not os.path.exists(dn): os.makedirs(dn) except (OSError, IOError) as err: self.report_error(u'unable to create directory ' + compat_str(err)) return
if self.params.get('writedescription', False): try: descfn = filename + u'.description' self.report_writedescription(descfn) with io.open(encodeFilename(descfn), 'w', encoding='utf-8') as descfile: descfile.write(info_dict['description']) except (KeyError, TypeError): self.report_warning(u'There\'s no description to write.') except (OSError, IOError): self.report_error(u'Cannot write description file ' + descfn) return
subtitles_are_requested = any([self.params.get('writesubtitles', False), self.params.get('writeautomaticsub')])
if subtitles_are_requested and 'subtitles' in info_dict and info_dict['subtitles']: # subtitles download errors are already managed as troubles in relevant IE # that way it will silently go on when used with unsupporting IE subtitles = info_dict['subtitles'] sub_format = self.params.get('subtitlesformat') for sub_lang in subtitles.keys(): sub = subtitles[sub_lang] if sub is None: continue try: sub_filename = subtitles_filename(filename, sub_lang, sub_format) self.report_writesubtitles(sub_filename) with io.open(encodeFilename(sub_filename), 'w', encoding='utf-8') as subfile: subfile.write(sub) except (OSError, IOError): self.report_error(u'Cannot write subtitles file ' + descfn) return
if self.params.get('writeinfojson', False): infofn = filename + u'.info.json' self.report_writeinfojson(infofn) try: json_info_dict = dict((k, v) for k,v in info_dict.items() if not k in ['urlhandle']) write_json_file(json_info_dict, encodeFilename(infofn)) except (OSError, IOError): self.report_error(u'Cannot write metadata to JSON file ' + infofn) return
if self.params.get('writethumbnail', False): if info_dict.get('thumbnail') is not None: thumb_format = determine_ext(info_dict['thumbnail'], u'jpg') thumb_filename = filename.rpartition('.')[0] + u'.' + thumb_format self.to_screen(u'[%s] %s: Downloading thumbnail ...' % (info_dict['extractor'], info_dict['id'])) try: uf = compat_urllib_request.urlopen(info_dict['thumbnail']) with open(thumb_filename, 'wb') as thumbf: shutil.copyfileobj(uf, thumbf) self.to_screen(u'[%s] %s: Writing thumbnail to: %s' % (info_dict['extractor'], info_dict['id'], thumb_filename)) except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err: self.report_warning(u'Unable to download thumbnail "%s": %s' % (info_dict['thumbnail'], compat_str(err)))
if not self.params.get('skip_download', False): if self.params.get('nooverwrites', False) and os.path.exists(encodeFilename(filename)): success = True else: try: success = self.fd._do_download(filename, info_dict) except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err: self.report_error(u'unable to download video data: %s' % str(err)) return except (OSError, IOError) as err: raise UnavailableVideoError(err) except (ContentTooShortError, ) as err: self.report_error(u'content too short (expected %s bytes and served %s)' % (err.expected, err.downloaded)) return
if success: try: self.post_process(filename, info_dict) except (PostProcessingError) as err: self.report_error(u'postprocessing: %s' % str(err)) return
def download(self, url_list): """Download a given list of URLs.""" if len(url_list) > 1 and self.fixed_template(): raise SameFileError(self.params['outtmpl'])
for url in url_list: try: #It also downloads the videos videos = self.extract_info(url) except UnavailableVideoError: self.report_error(u'unable to download video') except MaxDownloadsReached: self.to_screen(u'[info] Maximum number of downloaded files reached.') raise
return self._download_retcode
def post_process(self, filename, ie_info): """Run all the postprocessors on the given file.""" info = dict(ie_info) info['filepath'] = filename keep_video = None for pp in self._pps: try: keep_video_wish,new_info = pp.run(info) if keep_video_wish is not None: if keep_video_wish: keep_video = keep_video_wish elif keep_video is None: # No clear decision yet, let IE decide keep_video = keep_video_wish except PostProcessingError as e: self.report_error(e.msg) if keep_video is False and not self.params.get('keepvideo', False): try: self.to_screen(u'Deleting original file %s (pass -k to keep)' % filename) os.remove(encodeFilename(filename)) except (IOError, OSError): self.report_warning(u'Unable to remove downloaded video file')
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