2 # -*- coding: utf-8 -*-
4 from __future__ import absolute_import
22 class FileDownloader(object):
23 """File Downloader class.
25 File downloader objects are the ones responsible of downloading the
26 actual video file and writing it to disk if the user has requested
27 it, among some other tasks. In most cases there should be one per
28 program. As, given a video URL, the downloader doesn't know how to
29 extract all the needed information, task that InfoExtractors do, it
30 has to pass the URL to one of them.
32 For this, file downloader objects have a method that allows
33 InfoExtractors to be registered in a given order. When it is passed
34 a URL, the file downloader handles it to the first InfoExtractor it
35 finds that reports being able to handle it. The InfoExtractor extracts
36 all the information about the video or videos the URL refers to, and
37 asks the FileDownloader to process the video information, possibly
38 downloading the video.
40 File downloaders accept a lot of parameters. In order not to saturate
41 the object constructor with arguments, it receives a dictionary of
42 options instead. These options are available through the params
43 attribute for the InfoExtractors to use. The FileDownloader also
44 registers itself as the downloader in charge for the InfoExtractors
45 that are added to it, so this is a "mutual registration".
49 username: Username for authentication purposes.
50 password: Password for authentication purposes.
51 usenetrc: Use netrc for authentication instead.
52 quiet: Do not print messages to stdout.
53 forceurl: Force printing final URL.
54 forcetitle: Force printing title.
55 forcethumbnail: Force printing thumbnail URL.
56 forcedescription: Force printing description.
57 forcefilename: Force printing final filename.
58 simulate: Do not download the video files.
59 format: Video format code.
60 format_limit: Highest quality format to try.
61 outtmpl: Template for output names.
62 restrictfilenames: Do not allow "&" and spaces in file names
63 ignoreerrors: Do not stop on download errors.
64 ratelimit: Download speed limit, in bytes/sec.
65 nooverwrites: Prevent overwriting files.
66 retries: Number of times to retry for HTTP error 5xx
67 buffersize: Size of download buffer in bytes.
68 noresizebuffer: Do not automatically resize the download buffer.
69 continuedl: Try to continue downloads if possible.
70 noprogress: Do not print the progress bar.
71 playliststart: Playlist item to start at.
72 playlistend: Playlist item to end at.
73 matchtitle: Download only matching titles.
74 rejecttitle: Reject downloads for matching titles.
75 logtostderr: Log messages to stderr instead of stdout.
76 consoletitle: Display progress in console window's titlebar.
77 nopart: Do not use temporary .part files.
78 updatetime: Use the Last-modified header to set output file timestamps.
79 writedescription: Write the video description to a .description file
80 writeinfojson: Write the video description to a .info.json file
81 writesubtitles: Write the video subtitles to a file
82 onlysubtitles: Downloads only the subtitles of the video
83 allsubtitles: Downloads all the subtitles of the video
84 listsubtitles: Lists all available subtitles for the video
85 subtitlesformat: Subtitle format [sbv/srt] (default=srt)
86 subtitleslang: Language of the subtitles to download
87 test: Download only first bytes to test the downloader.
88 keepvideo: Keep the video file after post-processing
89 min_filesize: Skip files smaller than this size
90 max_filesize: Skip files larger than this size
96 _download_retcode = None
100 def __init__(self, params):
101 """Create a FileDownloader object with the given options."""
104 self._progress_hooks = []
105 self._download_retcode = 0
106 self._num_downloads = 0
107 self._screen_file = [sys.stdout, sys.stderr][params.get('logtostderr', False)]
110 if '%(stitle)s' in self.params['outtmpl']:
111 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.')
114 def format_bytes(bytes):
117 if type(bytes) is str:
122 exponent = int(math.log(bytes, 1024.0))
123 suffix = 'bkMGTPEZY'[exponent]
124 converted = float(bytes) / float(1024 ** exponent)
125 return '%.2f%s' % (converted, suffix)
128 def calc_percent(byte_counter, data_len):
131 return '%6s' % ('%3.1f%%' % (float(byte_counter) / float(data_len) * 100.0))
134 def calc_eta(start, now, total, current):
138 if current == 0 or dif < 0.001: # One millisecond
140 rate = float(current) / dif
141 eta = int((float(total) - float(current)) / rate)
142 (eta_mins, eta_secs) = divmod(eta, 60)
145 return '%02d:%02d' % (eta_mins, eta_secs)
148 def calc_speed(start, now, bytes):
150 if bytes == 0 or dif < 0.001: # One millisecond
151 return '%10s' % '---b/s'
152 return '%10s' % ('%s/s' % FileDownloader.format_bytes(float(bytes) / dif))
155 def best_block_size(elapsed_time, bytes):
156 new_min = max(bytes / 2.0, 1.0)
157 new_max = min(max(bytes * 2.0, 1.0), 4194304) # Do not surpass 4 MB
158 if elapsed_time < 0.001:
160 rate = bytes / elapsed_time
168 def parse_bytes(bytestr):
169 """Parse a string indicating a byte quantity into an integer."""
170 matchobj = re.match(r'(?i)^(\d+(?:\.\d+)?)([kMGTPEZY]?)$', bytestr)
173 number = float(matchobj.group(1))
174 multiplier = 1024.0 ** 'bkmgtpezy'.index(matchobj.group(2).lower())
175 return int(round(number * multiplier))
177 def add_info_extractor(self, ie):
178 """Add an InfoExtractor object to the end of the list."""
180 ie.set_downloader(self)
182 def add_post_processor(self, pp):
183 """Add a PostProcessor object to the end of the chain."""
185 pp.set_downloader(self)
187 def to_screen(self, message, skip_eol=False):
188 """Print message to stdout if not in quiet mode."""
189 assert type(message) == type(u'')
190 if not self.params.get('quiet', False):
191 terminator = [u'\n', u''][skip_eol]
192 output = message + terminator
193 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
194 output = output.encode(preferredencoding(), 'ignore')
195 self._screen_file.write(output)
196 self._screen_file.flush()
198 def to_stderr(self, message):
199 """Print message to stderr."""
200 assert type(message) == type(u'')
201 output = message + u'\n'
202 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
203 output = output.encode(preferredencoding())
204 sys.stderr.write(output)
206 def to_cons_title(self, message):
207 """Set console/terminal window title to message."""
208 if not self.params.get('consoletitle', False):
210 if os.name == 'nt' and ctypes.windll.kernel32.GetConsoleWindow():
211 # c_wchar_p() might not be necessary if `message` is
212 # already of type unicode()
213 ctypes.windll.kernel32.SetConsoleTitleW(ctypes.c_wchar_p(message))
214 elif 'TERM' in os.environ:
215 self.to_screen('\033]0;%s\007' % message, skip_eol=True)
217 def fixed_template(self):
218 """Checks if the output template is fixed."""
219 return (re.search(u'(?u)%\\(.+?\\)s', self.params['outtmpl']) is None)
221 def trouble(self, message=None, tb=None):
222 """Determine action to take when a download problem appears.
224 Depending on if the downloader has been configured to ignore
225 download errors or not, this method may throw an exception or
226 not when errors are found, after printing the message.
228 tb, if given, is additional traceback information.
230 if message is not None:
231 self.to_stderr(message)
232 if self.params.get('verbose'):
234 if sys.exc_info()[0]: # if .trouble has been called from an except block
236 if hasattr(sys.exc_info()[1], 'exc_info') and sys.exc_info()[1].exc_info[0]:
237 tb += u''.join(traceback.format_exception(*sys.exc_info()[1].exc_info))
238 tb += compat_str(traceback.format_exc())
240 tb_data = traceback.format_list(traceback.extract_stack())
241 tb = u''.join(tb_data)
243 if not self.params.get('ignoreerrors', False):
244 if sys.exc_info()[0] and hasattr(sys.exc_info()[1], 'exc_info') and sys.exc_info()[1].exc_info[0]:
245 exc_info = sys.exc_info()[1].exc_info
247 exc_info = sys.exc_info()
248 raise DownloadError(message, exc_info)
249 self._download_retcode = 1
251 def report_warning(self, message):
253 Print the message to stderr, it will be prefixed with 'WARNING:'
254 If stderr is a tty file the 'WARNING:' will be colored
256 if sys.stderr.isatty():
257 _msg_header=u'\033[0;33mWARNING:\033[0m'
259 _msg_header=u'WARNING:'
260 warning_message=u'%s %s' % (_msg_header,message)
261 self.to_stderr(warning_message)
263 def report_error(self, message, tb=None):
265 Do the same as trouble, but prefixes the message with 'ERROR:', colored
266 in red if stderr is a tty file.
268 if sys.stderr.isatty():
269 _msg_header = u'\033[0;31mERROR:\033[0m'
271 _msg_header = u'ERROR:'
272 error_message = u'%s %s' % (_msg_header, message)
273 self.trouble(error_message, tb)
275 def slow_down(self, start_time, byte_counter):
276 """Sleep if the download speed is over the rate limit."""
277 rate_limit = self.params.get('ratelimit', None)
278 if rate_limit is None or byte_counter == 0:
281 elapsed = now - start_time
284 speed = float(byte_counter) / elapsed
285 if speed > rate_limit:
286 time.sleep((byte_counter - rate_limit * (now - start_time)) / rate_limit)
288 def temp_name(self, filename):
289 """Returns a temporary filename for the given filename."""
290 if self.params.get('nopart', False) or filename == u'-' or \
291 (os.path.exists(encodeFilename(filename)) and not os.path.isfile(encodeFilename(filename))):
293 return filename + u'.part'
295 def undo_temp_name(self, filename):
296 if filename.endswith(u'.part'):
297 return filename[:-len(u'.part')]
300 def try_rename(self, old_filename, new_filename):
302 if old_filename == new_filename:
304 os.rename(encodeFilename(old_filename), encodeFilename(new_filename))
305 except (IOError, OSError) as err:
306 self.report_error(u'unable to rename file')
308 def try_utime(self, filename, last_modified_hdr):
309 """Try to set the last-modified time of the given file."""
310 if last_modified_hdr is None:
312 if not os.path.isfile(encodeFilename(filename)):
314 timestr = last_modified_hdr
317 filetime = timeconvert(timestr)
321 os.utime(filename, (time.time(), filetime))
326 def report_writedescription(self, descfn):
327 """ Report that the description file is being written """
328 self.to_screen(u'[info] Writing video description to: ' + descfn)
330 def report_writesubtitles(self, sub_filename):
331 """ Report that the subtitles file is being written """
332 self.to_screen(u'[info] Writing video subtitles to: ' + sub_filename)
334 def report_writeinfojson(self, infofn):
335 """ Report that the metadata file has been written """
336 self.to_screen(u'[info] Video description metadata as JSON to: ' + infofn)
338 def report_destination(self, filename):
339 """Report destination filename."""
340 self.to_screen(u'[download] Destination: ' + filename)
342 def report_progress(self, percent_str, data_len_str, speed_str, eta_str):
343 """Report download progress."""
344 if self.params.get('noprogress', False):
346 if self.params.get('progress_with_newline', False):
347 self.to_screen(u'[download] %s of %s at %s ETA %s' %
348 (percent_str, data_len_str, speed_str, eta_str))
350 self.to_screen(u'\r[download] %s of %s at %s ETA %s' %
351 (percent_str, data_len_str, speed_str, eta_str), skip_eol=True)
352 self.to_cons_title(u'youtube-dl - %s of %s at %s ETA %s' %
353 (percent_str.strip(), data_len_str.strip(), speed_str.strip(), eta_str.strip()))
355 def report_resuming_byte(self, resume_len):
356 """Report attempt to resume at given byte."""
357 self.to_screen(u'[download] Resuming download at byte %s' % resume_len)
359 def report_retry(self, count, retries):
360 """Report retry in case of HTTP error 5xx"""
361 self.to_screen(u'[download] Got server HTTP error. Retrying (attempt %d of %d)...' % (count, retries))
363 def report_file_already_downloaded(self, file_name):
364 """Report file has already been fully downloaded."""
366 self.to_screen(u'[download] %s has already been downloaded' % file_name)
367 except (UnicodeEncodeError) as err:
368 self.to_screen(u'[download] The file has already been downloaded')
370 def report_unable_to_resume(self):
371 """Report it was impossible to resume download."""
372 self.to_screen(u'[download] Unable to resume')
374 def report_finish(self):
375 """Report download finished."""
376 if self.params.get('noprogress', False):
377 self.to_screen(u'[download] Download completed')
381 def increment_downloads(self):
382 """Increment the ordinal that assigns a number to each file."""
383 self._num_downloads += 1
385 def prepare_filename(self, info_dict):
386 """Generate the output filename."""
388 template_dict = dict(info_dict)
390 template_dict['epoch'] = int(time.time())
391 autonumber_size = self.params.get('autonumber_size')
392 if autonumber_size is None:
394 autonumber_templ = u'%0' + str(autonumber_size) + u'd'
395 template_dict['autonumber'] = autonumber_templ % self._num_downloads
397 sanitize = lambda k,v: sanitize_filename(
398 u'NA' if v is None else compat_str(v),
399 restricted=self.params.get('restrictfilenames'),
401 template_dict = dict((k, sanitize(k, v)) for k,v in template_dict.items())
403 filename = self.params['outtmpl'] % template_dict
405 except KeyError as err:
406 self.trouble(u'ERROR: Erroneous output template')
408 except ValueError as err:
409 self.trouble(u'ERROR: Insufficient system charset ' + repr(preferredencoding()))
412 def _match_entry(self, info_dict):
413 """ Returns None iff the file should be downloaded """
415 title = info_dict['title']
416 matchtitle = self.params.get('matchtitle', False)
418 if not re.search(matchtitle, title, re.IGNORECASE):
419 return u'[download] "' + title + '" title did not match pattern "' + matchtitle + '"'
420 rejecttitle = self.params.get('rejecttitle', False)
422 if re.search(rejecttitle, title, re.IGNORECASE):
423 return u'"' + title + '" title matched reject pattern "' + rejecttitle + '"'
426 def process_info(self, info_dict):
427 """Process a single dictionary returned by an InfoExtractor."""
429 # Keep for backwards compatibility
430 info_dict['stitle'] = info_dict['title']
432 if not 'format' in info_dict:
433 info_dict['format'] = info_dict['ext']
435 reason = self._match_entry(info_dict)
436 if reason is not None:
437 self.to_screen(u'[download] ' + reason)
440 max_downloads = self.params.get('max_downloads')
441 if max_downloads is not None:
442 if self._num_downloads > int(max_downloads):
443 raise MaxDownloadsReached()
445 filename = self.prepare_filename(info_dict)
448 if self.params.get('forcetitle', False):
449 compat_print(info_dict['title'])
450 if self.params.get('forceurl', False):
451 compat_print(info_dict['url'])
452 if self.params.get('forcethumbnail', False) and 'thumbnail' in info_dict:
453 compat_print(info_dict['thumbnail'])
454 if self.params.get('forcedescription', False) and 'description' in info_dict:
455 compat_print(info_dict['description'])
456 if self.params.get('forcefilename', False) and filename is not None:
457 compat_print(filename)
458 if self.params.get('forceformat', False):
459 compat_print(info_dict['format'])
461 # Do nothing else if in simulate mode
462 if self.params.get('simulate', False):
469 dn = os.path.dirname(encodeFilename(filename))
470 if dn != '' and not os.path.exists(dn): # dn is already encoded
472 except (OSError, IOError) as err:
473 self.report_error(u'unable to create directory ' + compat_str(err))
476 if self.params.get('writedescription', False):
478 descfn = filename + u'.description'
479 self.report_writedescription(descfn)
480 with io.open(encodeFilename(descfn), 'w', encoding='utf-8') as descfile:
481 descfile.write(info_dict['description'])
482 except (OSError, IOError):
483 self.report_error(u'Cannot write description file ' + descfn)
486 if self.params.get('writesubtitles', False) and 'subtitles' in info_dict and info_dict['subtitles']:
487 # subtitles download errors are already managed as troubles in relevant IE
488 # that way it will silently go on when used with unsupporting IE
489 subtitle = info_dict['subtitles'][0]
490 (sub_error, sub_lang, sub) = subtitle
491 sub_format = self.params.get('subtitlesformat')
493 self.report_warning("Some error while getting the subtitles")
496 sub_filename = filename.rsplit('.', 1)[0] + u'.' + sub_lang + u'.' + sub_format
497 self.report_writesubtitles(sub_filename)
498 with io.open(encodeFilename(sub_filename), 'w', encoding='utf-8') as subfile:
500 except (OSError, IOError):
501 self.report_error(u'Cannot write subtitles file ' + descfn)
503 if self.params.get('onlysubtitles', False):
506 if self.params.get('allsubtitles', False) and 'subtitles' in info_dict and info_dict['subtitles']:
507 subtitles = info_dict['subtitles']
508 sub_format = self.params.get('subtitlesformat')
509 for subtitle in subtitles:
510 (sub_error, sub_lang, sub) = subtitle
512 self.report_warning("Some error while getting the subtitles")
515 sub_filename = filename.rsplit('.', 1)[0] + u'.' + sub_lang + u'.' + sub_format
516 self.report_writesubtitles(sub_filename)
517 with io.open(encodeFilename(sub_filename), 'w', encoding='utf-8') as subfile:
519 except (OSError, IOError):
520 self.trouble(u'ERROR: Cannot write subtitles file ' + descfn)
522 if self.params.get('onlysubtitles', False):
525 if self.params.get('writeinfojson', False):
526 infofn = filename + u'.info.json'
527 self.report_writeinfojson(infofn)
529 json_info_dict = dict((k, v) for k,v in info_dict.items() if not k in ['urlhandle'])
530 write_json_file(json_info_dict, encodeFilename(infofn))
531 except (OSError, IOError):
532 self.report_error(u'Cannot write metadata to JSON file ' + infofn)
535 if not self.params.get('skip_download', False):
536 if self.params.get('nooverwrites', False) and os.path.exists(encodeFilename(filename)):
540 success = self._do_download(filename, info_dict)
541 except (OSError, IOError) as err:
542 raise UnavailableVideoError()
543 except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
544 self.report_error(u'unable to download video data: %s' % str(err))
546 except (ContentTooShortError, ) as err:
547 self.report_error(u'content too short (expected %s bytes and served %s)' % (err.expected, err.downloaded))
552 self.post_process(filename, info_dict)
553 except (PostProcessingError) as err:
554 self.report_error(u'postprocessing: %s' % str(err))
557 def download(self, url_list):
558 """Download a given list of URLs."""
559 if len(url_list) > 1 and self.fixed_template():
560 raise SameFileError(self.params['outtmpl'])
563 suitable_found = False
565 # Go to next InfoExtractor if not suitable
566 if not ie.suitable(url):
569 # Warn if the _WORKING attribute is False
571 self.report_warning(u'the program functionality for this site has been marked as broken, '
572 u'and will probably not work. If you want to go on, use the -i option.')
574 # Suitable InfoExtractor found
575 suitable_found = True
577 # Extract information from URL and process it
579 videos = ie.extract(url)
580 except ExtractorError as de: # An error we somewhat expected
581 self.trouble(u'ERROR: ' + compat_str(de), de.format_traceback())
583 except MaxDownloadsReached:
584 self.to_screen(u'[info] Maximum number of downloaded files reached.')
586 except Exception as e:
587 if self.params.get('ignoreerrors', False):
588 self.report_error(u'' + compat_str(e), tb=compat_str(traceback.format_exc()))
593 if len(videos or []) > 1 and self.fixed_template():
594 raise SameFileError(self.params['outtmpl'])
596 for video in videos or []:
597 video['extractor'] = ie.IE_NAME
599 self.increment_downloads()
600 self.process_info(video)
601 except UnavailableVideoError:
602 self.to_stderr(u"\n")
603 self.report_error(u'unable to download video')
605 # Suitable InfoExtractor had been found; go to next URL
608 if not suitable_found:
609 self.report_error(u'no suitable InfoExtractor: %s' % url)
611 return self._download_retcode
613 def post_process(self, filename, ie_info):
614 """Run all the postprocessors on the given file."""
616 info['filepath'] = filename
620 keep_video_wish,new_info = pp.run(info)
621 if keep_video_wish is not None:
623 keep_video = keep_video_wish
624 elif keep_video is None:
625 # No clear decision yet, let IE decide
626 keep_video = keep_video_wish
627 except PostProcessingError as e:
628 self.to_stderr(u'ERROR: ' + e.msg)
629 if keep_video is False and not self.params.get('keepvideo', False):
631 self.to_screen(u'Deleting original file %s (pass -k to keep)' % filename)
632 os.remove(encodeFilename(filename))
633 except (IOError, OSError):
634 self.report_warning(u'Unable to remove downloaded video file')
636 def _download_with_rtmpdump(self, filename, url, player_url, page_url, play_path):
637 self.report_destination(filename)
638 tmpfilename = self.temp_name(filename)
640 # Check for rtmpdump first
642 subprocess.call(['rtmpdump', '-h'], stdout=(open(os.path.devnull, 'w')), stderr=subprocess.STDOUT)
643 except (OSError, IOError):
644 self.report_error(u'RTMP download detected but "rtmpdump" could not be run')
647 # Download using rtmpdump. rtmpdump returns exit code 2 when
648 # the connection was interrumpted and resuming appears to be
649 # possible. This is part of rtmpdump's normal usage, AFAIK.
650 basic_args = ['rtmpdump', '-q', '-r', url, '-o', tmpfilename]
651 if player_url is not None:
652 basic_args += ['-W', player_url]
653 if page_url is not None:
654 basic_args += ['--pageUrl', page_url]
655 if play_path is not None:
656 basic_args += ['-y', play_path]
657 args = basic_args + [[], ['-e', '-k', '1']][self.params.get('continuedl', False)]
658 if self.params.get('verbose', False):
661 shell_quote = lambda args: ' '.join(map(pipes.quote, args))
664 self.to_screen(u'[debug] rtmpdump command line: ' + shell_quote(args))
665 retval = subprocess.call(args)
666 while retval == 2 or retval == 1:
667 prevsize = os.path.getsize(encodeFilename(tmpfilename))
668 self.to_screen(u'\r[rtmpdump] %s bytes' % prevsize, skip_eol=True)
669 time.sleep(5.0) # This seems to be needed
670 retval = subprocess.call(basic_args + ['-e'] + [[], ['-k', '1']][retval == 1])
671 cursize = os.path.getsize(encodeFilename(tmpfilename))
672 if prevsize == cursize and retval == 1:
674 # Some rtmp streams seem abort after ~ 99.8%. Don't complain for those
675 if prevsize == cursize and retval == 2 and cursize > 1024:
676 self.to_screen(u'\r[rtmpdump] Could not download the whole video. This can happen for some advertisements.')
680 fsize = os.path.getsize(encodeFilename(tmpfilename))
681 self.to_screen(u'\r[rtmpdump] %s bytes' % fsize)
682 self.try_rename(tmpfilename, filename)
683 self._hook_progress({
684 'downloaded_bytes': fsize,
685 'total_bytes': fsize,
686 'filename': filename,
687 'status': 'finished',
691 self.to_stderr(u"\n")
692 self.report_error(u'rtmpdump exited with code %d' % retval)
695 def _do_download(self, filename, info_dict):
696 url = info_dict['url']
698 # Check file already present
699 if self.params.get('continuedl', False) and os.path.isfile(encodeFilename(filename)) and not self.params.get('nopart', False):
700 self.report_file_already_downloaded(filename)
701 self._hook_progress({
702 'filename': filename,
703 'status': 'finished',
707 # Attempt to download using rtmpdump
708 if url.startswith('rtmp'):
709 return self._download_with_rtmpdump(filename, url,
710 info_dict.get('player_url', None),
711 info_dict.get('page_url', None),
712 info_dict.get('play_path', None))
714 tmpfilename = self.temp_name(filename)
717 # Do not include the Accept-Encoding header
718 headers = {'Youtubedl-no-compression': 'True'}
719 if 'user_agent' in info_dict:
720 headers['Youtubedl-user-agent'] = info_dict['user_agent']
721 basic_request = compat_urllib_request.Request(url, None, headers)
722 request = compat_urllib_request.Request(url, None, headers)
724 if self.params.get('test', False):
725 request.add_header('Range','bytes=0-10240')
727 # Establish possible resume length
728 if os.path.isfile(encodeFilename(tmpfilename)):
729 resume_len = os.path.getsize(encodeFilename(tmpfilename))
735 if self.params.get('continuedl', False):
736 self.report_resuming_byte(resume_len)
737 request.add_header('Range','bytes=%d-' % resume_len)
743 retries = self.params.get('retries', 0)
744 while count <= retries:
745 # Establish connection
747 if count == 0 and 'urlhandle' in info_dict:
748 data = info_dict['urlhandle']
749 data = compat_urllib_request.urlopen(request)
751 except (compat_urllib_error.HTTPError, ) as err:
752 if (err.code < 500 or err.code >= 600) and err.code != 416:
753 # Unexpected HTTP error
755 elif err.code == 416:
756 # Unable to resume (requested range not satisfiable)
758 # Open the connection again without the range header
759 data = compat_urllib_request.urlopen(basic_request)
760 content_length = data.info()['Content-Length']
761 except (compat_urllib_error.HTTPError, ) as err:
762 if err.code < 500 or err.code >= 600:
765 # Examine the reported length
766 if (content_length is not None and
767 (resume_len - 100 < int(content_length) < resume_len + 100)):
768 # The file had already been fully downloaded.
769 # Explanation to the above condition: in issue #175 it was revealed that
770 # YouTube sometimes adds or removes a few bytes from the end of the file,
771 # changing the file size slightly and causing problems for some users. So
772 # I decided to implement a suggested change and consider the file
773 # completely downloaded if the file size differs less than 100 bytes from
774 # the one in the hard drive.
775 self.report_file_already_downloaded(filename)
776 self.try_rename(tmpfilename, filename)
777 self._hook_progress({
778 'filename': filename,
779 'status': 'finished',
783 # The length does not match, we start the download over
784 self.report_unable_to_resume()
790 self.report_retry(count, retries)
793 self.report_error(u'giving up after %s retries' % retries)
796 data_len = data.info().get('Content-length', None)
797 if data_len is not None:
798 data_len = int(data_len) + resume_len
799 min_data_len = self.params.get("min_filesize", None)
800 max_data_len = self.params.get("max_filesize", None)
801 if min_data_len is not None and data_len < min_data_len:
802 self.to_screen(u'\r[download] File is smaller than min-filesize (%s bytes < %s bytes). Aborting.' % (data_len, min_data_len))
804 if max_data_len is not None and data_len > max_data_len:
805 self.to_screen(u'\r[download] File is larger than max-filesize (%s bytes > %s bytes). Aborting.' % (data_len, max_data_len))
808 data_len_str = self.format_bytes(data_len)
809 byte_counter = 0 + resume_len
810 block_size = self.params.get('buffersize', 1024)
815 data_block = data.read(block_size)
817 if len(data_block) == 0:
819 byte_counter += len(data_block)
821 # Open file just in time
824 (stream, tmpfilename) = sanitize_open(tmpfilename, open_mode)
825 assert stream is not None
826 filename = self.undo_temp_name(tmpfilename)
827 self.report_destination(filename)
828 except (OSError, IOError) as err:
829 self.report_error(u'unable to open for writing: %s' % str(err))
832 stream.write(data_block)
833 except (IOError, OSError) as err:
834 self.to_stderr(u"\n")
835 self.report_error(u'unable to write data: %s' % str(err))
837 if not self.params.get('noresizebuffer', False):
838 block_size = self.best_block_size(after - before, len(data_block))
841 speed_str = self.calc_speed(start, time.time(), byte_counter - resume_len)
843 self.report_progress('Unknown %', data_len_str, speed_str, 'Unknown ETA')
845 percent_str = self.calc_percent(byte_counter, data_len)
846 eta_str = self.calc_eta(start, time.time(), data_len - resume_len, byte_counter - resume_len)
847 self.report_progress(percent_str, data_len_str, speed_str, eta_str)
849 self._hook_progress({
850 'downloaded_bytes': byte_counter,
851 'total_bytes': data_len,
852 'tmpfilename': tmpfilename,
853 'filename': filename,
854 'status': 'downloading',
858 self.slow_down(start, byte_counter - resume_len)
861 self.to_stderr(u"\n")
862 self.report_error(u'Did not get any data blocks')
866 if data_len is not None and byte_counter != data_len:
867 raise ContentTooShortError(byte_counter, int(data_len))
868 self.try_rename(tmpfilename, filename)
870 # Update file modification time
871 if self.params.get('updatetime', True):
872 info_dict['filetime'] = self.try_utime(filename, data.info().get('last-modified', None))
874 self._hook_progress({
875 'downloaded_bytes': byte_counter,
876 'total_bytes': byte_counter,
877 'filename': filename,
878 'status': 'finished',
883 def _hook_progress(self, status):
884 for ph in self._progress_hooks:
887 def add_progress_hook(self, ph):
888 """ ph gets called on download progress, with a dictionary with the entries
889 * filename: The final filename
890 * status: One of "downloading" and "finished"
892 It can also have some of the following entries:
894 * downloaded_bytes: Bytes on disks
895 * total_bytes: Total bytes, None if unknown
896 * tmpfilename: The filename we're currently writing to
898 Hooks are guaranteed to be called at least once (with status "finished")
899 if the download is successful.
901 self._progress_hooks.append(ph)