2 # -*- coding: utf-8 -*-
20 class FileDownloader(object):
21 """File Downloader class.
23 File downloader objects are the ones responsible of downloading the
24 actual video file and writing it to disk if the user has requested
25 it, among some other tasks. In most cases there should be one per
26 program. As, given a video URL, the downloader doesn't know how to
27 extract all the needed information, task that InfoExtractors do, it
28 has to pass the URL to one of them.
30 For this, file downloader objects have a method that allows
31 InfoExtractors to be registered in a given order. When it is passed
32 a URL, the file downloader handles it to the first InfoExtractor it
33 finds that reports being able to handle it. The InfoExtractor extracts
34 all the information about the video or videos the URL refers to, and
35 asks the FileDownloader to process the video information, possibly
36 downloading the video.
38 File downloaders accept a lot of parameters. In order not to saturate
39 the object constructor with arguments, it receives a dictionary of
40 options instead. These options are available through the params
41 attribute for the InfoExtractors to use. The FileDownloader also
42 registers itself as the downloader in charge for the InfoExtractors
43 that are added to it, so this is a "mutual registration".
47 username: Username for authentication purposes.
48 password: Password for authentication purposes.
49 usenetrc: Use netrc for authentication instead.
50 quiet: Do not print messages to stdout.
51 forceurl: Force printing final URL.
52 forcetitle: Force printing title.
53 forcethumbnail: Force printing thumbnail URL.
54 forcedescription: Force printing description.
55 forcefilename: Force printing final filename.
56 simulate: Do not download the video files.
57 format: Video format code.
58 format_limit: Highest quality format to try.
59 outtmpl: Template for output names.
60 restrictfilenames: Do not allow "&" and spaces in file names
61 ignoreerrors: Do not stop on download errors.
62 ratelimit: Download speed limit, in bytes/sec.
63 nooverwrites: Prevent overwriting files.
64 retries: Number of times to retry for HTTP error 5xx
65 continuedl: Try to continue downloads if possible.
66 noprogress: Do not print the progress bar.
67 playliststart: Playlist item to start at.
68 playlistend: Playlist item to end at.
69 matchtitle: Download only matching titles.
70 rejecttitle: Reject downloads for matching titles.
71 logtostderr: Log messages to stderr instead of stdout.
72 consoletitle: Display progress in console window's titlebar.
73 nopart: Do not use temporary .part files.
74 updatetime: Use the Last-modified header to set output file timestamps.
75 writedescription: Write the video description to a .description file
76 writeinfojson: Write the video description to a .info.json file
77 writesubtitles: Write the video subtitles to a .srt file
78 subtitleslang: Language of the subtitles to download
84 _download_retcode = None
88 def __init__(self, params):
89 """Create a FileDownloader object with the given options."""
92 self._download_retcode = 0
93 self._num_downloads = 0
94 self._screen_file = [sys.stdout, sys.stderr][params.get('logtostderr', False)]
97 if '%(stitle)s' in self.params['outtmpl']:
98 self.to_stderr(u'WARNING: %(stitle)s is deprecated. Use the %(title)s and the --restrict-filenames flag(which also secures %(uploader)s et al) instead.')
101 def format_bytes(bytes):
104 if type(bytes) is str:
109 exponent = long(math.log(bytes, 1024.0))
110 suffix = 'bkMGTPEZY'[exponent]
111 converted = float(bytes) / float(1024 ** exponent)
112 return '%.2f%s' % (converted, suffix)
115 def calc_percent(byte_counter, data_len):
118 return '%6s' % ('%3.1f%%' % (float(byte_counter) / float(data_len) * 100.0))
121 def calc_eta(start, now, total, current):
125 if current == 0 or dif < 0.001: # One millisecond
127 rate = float(current) / dif
128 eta = long((float(total) - float(current)) / rate)
129 (eta_mins, eta_secs) = divmod(eta, 60)
132 return '%02d:%02d' % (eta_mins, eta_secs)
135 def calc_speed(start, now, bytes):
137 if bytes == 0 or dif < 0.001: # One millisecond
138 return '%10s' % '---b/s'
139 return '%10s' % ('%s/s' % FileDownloader.format_bytes(float(bytes) / dif))
142 def best_block_size(elapsed_time, bytes):
143 new_min = max(bytes / 2.0, 1.0)
144 new_max = min(max(bytes * 2.0, 1.0), 4194304) # Do not surpass 4 MB
145 if elapsed_time < 0.001:
147 rate = bytes / elapsed_time
155 def parse_bytes(bytestr):
156 """Parse a string indicating a byte quantity into an integer."""
157 matchobj = re.match(r'(?i)^(\d+(?:\.\d+)?)([kMGTPEZY]?)$', bytestr)
160 number = float(matchobj.group(1))
161 multiplier = 1024.0 ** 'bkmgtpezy'.index(matchobj.group(2).lower())
162 return int(round(number * multiplier))
164 def add_info_extractor(self, ie):
165 """Add an InfoExtractor object to the end of the list."""
167 ie.set_downloader(self)
169 def add_post_processor(self, pp):
170 """Add a PostProcessor object to the end of the chain."""
172 pp.set_downloader(self)
174 def to_screen(self, message, skip_eol=False):
175 """Print message to stdout if not in quiet mode."""
176 assert type(message) == type(u'')
177 if not self.params.get('quiet', False):
178 terminator = [u'\n', u''][skip_eol]
179 output = message + terminator
180 if 'b' not in self._screen_file.mode or sys.version_info[0] < 3: # Python 2 lies about the mode of sys.stdout/sys.stderr
181 output = output.encode(preferredencoding(), 'ignore')
182 self._screen_file.write(output)
183 self._screen_file.flush()
185 def to_stderr(self, message):
186 """Print message to stderr."""
187 assert type(message) == type(u'')
188 sys.stderr.write((message + u'\n').encode(preferredencoding()))
190 def to_cons_title(self, message):
191 """Set console/terminal window title to message."""
192 if not self.params.get('consoletitle', False):
194 if os.name == 'nt' and ctypes.windll.kernel32.GetConsoleWindow():
195 # c_wchar_p() might not be necessary if `message` is
196 # already of type unicode()
197 ctypes.windll.kernel32.SetConsoleTitleW(ctypes.c_wchar_p(message))
198 elif 'TERM' in os.environ:
199 sys.stderr.write('\033]0;%s\007' % message.encode(preferredencoding()))
201 def fixed_template(self):
202 """Checks if the output template is fixed."""
203 return (re.search(ur'(?u)%\(.+?\)s', self.params['outtmpl']) is None)
205 def trouble(self, message=None):
206 """Determine action to take when a download problem appears.
208 Depending on if the downloader has been configured to ignore
209 download errors or not, this method may throw an exception or
210 not when errors are found, after printing the message.
212 if message is not None:
213 self.to_stderr(message)
214 if not self.params.get('ignoreerrors', False):
215 raise DownloadError(message)
216 self._download_retcode = 1
218 def slow_down(self, start_time, byte_counter):
219 """Sleep if the download speed is over the rate limit."""
220 rate_limit = self.params.get('ratelimit', None)
221 if rate_limit is None or byte_counter == 0:
224 elapsed = now - start_time
227 speed = float(byte_counter) / elapsed
228 if speed > rate_limit:
229 time.sleep((byte_counter - rate_limit * (now - start_time)) / rate_limit)
231 def temp_name(self, filename):
232 """Returns a temporary filename for the given filename."""
233 if self.params.get('nopart', False) or filename == u'-' or \
234 (os.path.exists(encodeFilename(filename)) and not os.path.isfile(encodeFilename(filename))):
236 return filename + u'.part'
238 def undo_temp_name(self, filename):
239 if filename.endswith(u'.part'):
240 return filename[:-len(u'.part')]
243 def try_rename(self, old_filename, new_filename):
245 if old_filename == new_filename:
247 os.rename(encodeFilename(old_filename), encodeFilename(new_filename))
248 except (IOError, OSError), err:
249 self.trouble(u'ERROR: unable to rename file')
251 def try_utime(self, filename, last_modified_hdr):
252 """Try to set the last-modified time of the given file."""
253 if last_modified_hdr is None:
255 if not os.path.isfile(encodeFilename(filename)):
257 timestr = last_modified_hdr
260 filetime = timeconvert(timestr)
264 os.utime(filename, (time.time(), filetime))
269 def report_writedescription(self, descfn):
270 """ Report that the description file is being written """
271 self.to_screen(u'[info] Writing video description to: ' + descfn)
273 def report_writesubtitles(self, srtfn):
274 """ Report that the subtitles file is being written """
275 self.to_screen(u'[info] Writing video subtitles to: ' + srtfn)
277 def report_writeinfojson(self, infofn):
278 """ Report that the metadata file has been written """
279 self.to_screen(u'[info] Video description metadata as JSON to: ' + infofn)
281 def report_destination(self, filename):
282 """Report destination filename."""
283 self.to_screen(u'[download] Destination: ' + filename)
285 def report_progress(self, percent_str, data_len_str, speed_str, eta_str):
286 """Report download progress."""
287 if self.params.get('noprogress', False):
289 self.to_screen(u'\r[download] %s of %s at %s ETA %s' %
290 (percent_str, data_len_str, speed_str, eta_str), skip_eol=True)
291 self.to_cons_title(u'youtube-dl - %s of %s at %s ETA %s' %
292 (percent_str.strip(), data_len_str.strip(), speed_str.strip(), eta_str.strip()))
294 def report_resuming_byte(self, resume_len):
295 """Report attempt to resume at given byte."""
296 self.to_screen(u'[download] Resuming download at byte %s' % resume_len)
298 def report_retry(self, count, retries):
299 """Report retry in case of HTTP error 5xx"""
300 self.to_screen(u'[download] Got server HTTP error. Retrying (attempt %d of %d)...' % (count, retries))
302 def report_file_already_downloaded(self, file_name):
303 """Report file has already been fully downloaded."""
305 self.to_screen(u'[download] %s has already been downloaded' % file_name)
306 except (UnicodeEncodeError), err:
307 self.to_screen(u'[download] The file has already been downloaded')
309 def report_unable_to_resume(self):
310 """Report it was impossible to resume download."""
311 self.to_screen(u'[download] Unable to resume')
313 def report_finish(self):
314 """Report download finished."""
315 if self.params.get('noprogress', False):
316 self.to_screen(u'[download] Download completed')
320 def increment_downloads(self):
321 """Increment the ordinal that assigns a number to each file."""
322 self._num_downloads += 1
324 def prepare_filename(self, info_dict):
325 """Generate the output filename."""
327 template_dict = dict(info_dict)
328 template_dict['epoch'] = unicode(int(time.time()))
329 template_dict['autonumber'] = unicode('%05d' % self._num_downloads)
330 filename = self.params['outtmpl'] % template_dict
332 except (ValueError, KeyError), err:
333 self.trouble(u'ERROR: invalid system charset or erroneous output template')
336 def _match_entry(self, info_dict):
337 """ Returns None iff the file should be downloaded """
339 title = info_dict['title']
340 matchtitle = self.params.get('matchtitle', False)
342 matchtitle = matchtitle.decode('utf8')
343 if not re.search(matchtitle, title, re.IGNORECASE):
344 return u'[download] "' + title + '" title did not match pattern "' + matchtitle + '"'
345 rejecttitle = self.params.get('rejecttitle', False)
347 rejecttitle = rejecttitle.decode('utf8')
348 if re.search(rejecttitle, title, re.IGNORECASE):
349 return u'"' + title + '" title matched reject pattern "' + rejecttitle + '"'
352 def process_info(self, info_dict):
353 """Process a single dictionary returned by an InfoExtractor."""
355 # Keep for backwards compatibility
356 info_dict['stitle'] = info_dict['title']
358 if not 'format' in info_dict:
359 info_dict['format'] = info_dict['ext']
361 reason = self._match_entry(info_dict)
362 if reason is not None:
363 self.to_screen(u'[download] ' + reason)
366 max_downloads = self.params.get('max_downloads')
367 if max_downloads is not None:
368 if self._num_downloads > int(max_downloads):
369 raise MaxDownloadsReached()
371 filename = self.prepare_filename(info_dict)
372 filename = sanitize_filename(filename, self.params.get('restrictfilenames'))
375 if self.params.get('forcetitle', False):
376 print(info_dict['title'].encode(preferredencoding(), 'xmlcharrefreplace'))
377 if self.params.get('forceurl', False):
378 print(info_dict['url'].encode(preferredencoding(), 'xmlcharrefreplace'))
379 if self.params.get('forcethumbnail', False) and 'thumbnail' in info_dict:
380 print(info_dict['thumbnail'].encode(preferredencoding(), 'xmlcharrefreplace'))
381 if self.params.get('forcedescription', False) and 'description' in info_dict:
382 print(info_dict['description'].encode(preferredencoding(), 'xmlcharrefreplace'))
383 if self.params.get('forcefilename', False) and filename is not None:
384 print(filename.encode(preferredencoding(), 'xmlcharrefreplace'))
385 if self.params.get('forceformat', False):
386 print(info_dict['format'].encode(preferredencoding(), 'xmlcharrefreplace'))
388 # Do nothing else if in simulate mode
389 if self.params.get('simulate', False):
396 dn = os.path.dirname(encodeFilename(filename))
397 if dn != '' and not os.path.exists(dn): # dn is already encoded
399 except (OSError, IOError), err:
400 self.trouble(u'ERROR: unable to create directory ' + unicode(err))
403 if self.params.get('writedescription', False):
405 descfn = filename + u'.description'
406 self.report_writedescription(descfn)
407 descfile = open(encodeFilename(descfn), 'wb')
409 descfile.write(info_dict['description'].encode('utf-8'))
412 except (OSError, IOError):
413 self.trouble(u'ERROR: Cannot write description file ' + descfn)
416 if self.params.get('writesubtitles', False) and 'subtitles' in info_dict and info_dict['subtitles']:
417 # subtitles download errors are already managed as troubles in relevant IE
418 # that way it will silently go on when used with unsupporting IE
420 srtfn = filename.rsplit('.', 1)[0] + u'.srt'
421 self.report_writesubtitles(srtfn)
422 srtfile = open(encodeFilename(srtfn), 'wb')
424 srtfile.write(info_dict['subtitles'].encode('utf-8'))
427 except (OSError, IOError):
428 self.trouble(u'ERROR: Cannot write subtitles file ' + descfn)
431 if self.params.get('writeinfojson', False):
432 infofn = filename + u'.info.json'
433 self.report_writeinfojson(infofn)
436 except (NameError,AttributeError):
437 self.trouble(u'ERROR: No JSON encoder found. Update to Python 2.6+, setup a json module, or leave out --write-info-json.')
440 infof = open(encodeFilename(infofn), 'wb')
442 json_info_dict = dict((k,v) for k,v in info_dict.iteritems() if not k in ('urlhandle',))
443 json.dump(json_info_dict, infof)
446 except (OSError, IOError):
447 self.trouble(u'ERROR: Cannot write metadata to JSON file ' + infofn)
450 if not self.params.get('skip_download', False):
451 if self.params.get('nooverwrites', False) and os.path.exists(encodeFilename(filename)):
455 success = self._do_download(filename, info_dict)
456 except (OSError, IOError), err:
457 raise UnavailableVideoError
458 except (urllib2.URLError, httplib.HTTPException, socket.error), err:
459 self.trouble(u'ERROR: unable to download video data: %s' % str(err))
461 except (ContentTooShortError, ), err:
462 self.trouble(u'ERROR: content too short (expected %s bytes and served %s)' % (err.expected, err.downloaded))
467 self.post_process(filename, info_dict)
468 except (PostProcessingError), err:
469 self.trouble(u'ERROR: postprocessing: %s' % str(err))
472 def download(self, url_list):
473 """Download a given list of URLs."""
474 if len(url_list) > 1 and self.fixed_template():
475 raise SameFileError(self.params['outtmpl'])
478 suitable_found = False
480 # Go to next InfoExtractor if not suitable
481 if not ie.suitable(url):
484 # Suitable InfoExtractor found
485 suitable_found = True
487 # Extract information from URL and process it
488 videos = ie.extract(url)
489 for video in videos or []:
490 video['extractor'] = ie.IE_NAME
492 self.increment_downloads()
493 self.process_info(video)
494 except UnavailableVideoError:
495 self.trouble(u'\nERROR: unable to download video')
497 # Suitable InfoExtractor had been found; go to next URL
500 if not suitable_found:
501 self.trouble(u'ERROR: no suitable InfoExtractor: %s' % url)
503 return self._download_retcode
505 def post_process(self, filename, ie_info):
506 """Run the postprocessing chain on the given file."""
508 info['filepath'] = filename
514 def _download_with_rtmpdump(self, filename, url, player_url):
515 self.report_destination(filename)
516 tmpfilename = self.temp_name(filename)
518 # Check for rtmpdump first
520 subprocess.call(['rtmpdump', '-h'], stdout=(file(os.path.devnull, 'w')), stderr=subprocess.STDOUT)
521 except (OSError, IOError):
522 self.trouble(u'ERROR: RTMP download detected but "rtmpdump" could not be run')
525 # Download using rtmpdump. rtmpdump returns exit code 2 when
526 # the connection was interrumpted and resuming appears to be
527 # possible. This is part of rtmpdump's normal usage, AFAIK.
528 basic_args = ['rtmpdump', '-q'] + [[], ['-W', player_url]][player_url is not None] + ['-r', url, '-o', tmpfilename]
529 args = basic_args + [[], ['-e', '-k', '1']][self.params.get('continuedl', False)]
530 if self.params.get('verbose', False):
533 shell_quote = lambda args: ' '.join(map(pipes.quote, args))
536 self.to_screen(u'[debug] rtmpdump command line: ' + shell_quote(args))
537 retval = subprocess.call(args)
538 while retval == 2 or retval == 1:
539 prevsize = os.path.getsize(encodeFilename(tmpfilename))
540 self.to_screen(u'\r[rtmpdump] %s bytes' % prevsize, skip_eol=True)
541 time.sleep(5.0) # This seems to be needed
542 retval = subprocess.call(basic_args + ['-e'] + [[], ['-k', '1']][retval == 1])
543 cursize = os.path.getsize(encodeFilename(tmpfilename))
544 if prevsize == cursize and retval == 1:
546 # Some rtmp streams seem abort after ~ 99.8%. Don't complain for those
547 if prevsize == cursize and retval == 2 and cursize > 1024:
548 self.to_screen(u'\r[rtmpdump] Could not download the whole video. This can happen for some advertisements.')
552 self.to_screen(u'\r[rtmpdump] %s bytes' % os.path.getsize(encodeFilename(tmpfilename)))
553 self.try_rename(tmpfilename, filename)
556 self.trouble(u'\nERROR: rtmpdump exited with code %d' % retval)
559 def _do_download(self, filename, info_dict):
560 url = info_dict['url']
561 player_url = info_dict.get('player_url', None)
563 # Check file already present
564 if self.params.get('continuedl', False) and os.path.isfile(encodeFilename(filename)) and not self.params.get('nopart', False):
565 self.report_file_already_downloaded(filename)
568 # Attempt to download using rtmpdump
569 if url.startswith('rtmp'):
570 return self._download_with_rtmpdump(filename, url, player_url)
572 tmpfilename = self.temp_name(filename)
575 # Do not include the Accept-Encoding header
576 headers = {'Youtubedl-no-compression': 'True'}
577 basic_request = urllib2.Request(url, None, headers)
578 request = urllib2.Request(url, None, headers)
580 # Establish possible resume length
581 if os.path.isfile(encodeFilename(tmpfilename)):
582 resume_len = os.path.getsize(encodeFilename(tmpfilename))
588 if self.params.get('continuedl', False):
589 self.report_resuming_byte(resume_len)
590 request.add_header('Range','bytes=%d-' % resume_len)
596 retries = self.params.get('retries', 0)
597 while count <= retries:
598 # Establish connection
600 if count == 0 and 'urlhandle' in info_dict:
601 data = info_dict['urlhandle']
602 data = urllib2.urlopen(request)
604 except (urllib2.HTTPError, ), err:
605 if (err.code < 500 or err.code >= 600) and err.code != 416:
606 # Unexpected HTTP error
608 elif err.code == 416:
609 # Unable to resume (requested range not satisfiable)
611 # Open the connection again without the range header
612 data = urllib2.urlopen(basic_request)
613 content_length = data.info()['Content-Length']
614 except (urllib2.HTTPError, ), err:
615 if err.code < 500 or err.code >= 600:
618 # Examine the reported length
619 if (content_length is not None and
620 (resume_len - 100 < long(content_length) < resume_len + 100)):
621 # The file had already been fully downloaded.
622 # Explanation to the above condition: in issue #175 it was revealed that
623 # YouTube sometimes adds or removes a few bytes from the end of the file,
624 # changing the file size slightly and causing problems for some users. So
625 # I decided to implement a suggested change and consider the file
626 # completely downloaded if the file size differs less than 100 bytes from
627 # the one in the hard drive.
628 self.report_file_already_downloaded(filename)
629 self.try_rename(tmpfilename, filename)
632 # The length does not match, we start the download over
633 self.report_unable_to_resume()
639 self.report_retry(count, retries)
642 self.trouble(u'ERROR: giving up after %s retries' % retries)
645 data_len = data.info().get('Content-length', None)
646 if data_len is not None:
647 data_len = long(data_len) + resume_len
648 data_len_str = self.format_bytes(data_len)
649 byte_counter = 0 + resume_len
655 data_block = data.read(block_size)
657 if len(data_block) == 0:
659 byte_counter += len(data_block)
661 # Open file just in time
664 (stream, tmpfilename) = sanitize_open(tmpfilename, open_mode)
665 assert stream is not None
666 filename = self.undo_temp_name(tmpfilename)
667 self.report_destination(filename)
668 except (OSError, IOError), err:
669 self.trouble(u'ERROR: unable to open for writing: %s' % str(err))
672 stream.write(data_block)
673 except (IOError, OSError), err:
674 self.trouble(u'\nERROR: unable to write data: %s' % str(err))
676 block_size = self.best_block_size(after - before, len(data_block))
679 speed_str = self.calc_speed(start, time.time(), byte_counter - resume_len)
681 self.report_progress('Unknown %', data_len_str, speed_str, 'Unknown ETA')
683 percent_str = self.calc_percent(byte_counter, data_len)
684 eta_str = self.calc_eta(start, time.time(), data_len - resume_len, byte_counter - resume_len)
685 self.report_progress(percent_str, data_len_str, speed_str, eta_str)
688 self.slow_down(start, byte_counter - resume_len)
691 self.trouble(u'\nERROR: Did not get any data blocks')
695 if data_len is not None and byte_counter != data_len:
696 raise ContentTooShortError(byte_counter, long(data_len))
697 self.try_rename(tmpfilename, filename)
699 # Update file modification time
700 if self.params.get('updatetime', True):
701 info_dict['filetime'] = self.try_utime(filename, data.info().get('last-modified', None))