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 ignoreerrors: Do not stop on download errors.
61 ratelimit: Download speed limit, in bytes/sec.
62 nooverwrites: Prevent overwriting files.
63 retries: Number of times to retry for HTTP error 5xx
64 continuedl: Try to continue downloads if possible.
65 noprogress: Do not print the progress bar.
66 playliststart: Playlist item to start at.
67 playlistend: Playlist item to end at.
68 matchtitle: Download only matching titles.
69 rejecttitle: Reject downloads for matching titles.
70 logtostderr: Log messages to stderr instead of stdout.
71 consoletitle: Display progress in console window's titlebar.
72 nopart: Do not use temporary .part files.
73 updatetime: Use the Last-modified header to set output file timestamps.
74 writedescription: Write the video description to a .description file
75 writeinfojson: Write the video description to a .info.json file
76 writesubtitles: Write the video subtitles to a .srt file
77 subtitleslang: Language of the subtitles to download
83 _download_retcode = None
87 def __init__(self, params):
88 """Create a FileDownloader object with the given options."""
91 self._download_retcode = 0
92 self._num_downloads = 0
93 self._screen_file = [sys.stdout, sys.stderr][params.get('logtostderr', False)]
97 def format_bytes(bytes):
100 if type(bytes) is str:
105 exponent = long(math.log(bytes, 1024.0))
106 suffix = 'bkMGTPEZY'[exponent]
107 converted = float(bytes) / float(1024 ** exponent)
108 return '%.2f%s' % (converted, suffix)
111 def calc_percent(byte_counter, data_len):
114 return '%6s' % ('%3.1f%%' % (float(byte_counter) / float(data_len) * 100.0))
117 def calc_eta(start, now, total, current):
121 if current == 0 or dif < 0.001: # One millisecond
123 rate = float(current) / dif
124 eta = long((float(total) - float(current)) / rate)
125 (eta_mins, eta_secs) = divmod(eta, 60)
128 return '%02d:%02d' % (eta_mins, eta_secs)
131 def calc_speed(start, now, bytes):
133 if bytes == 0 or dif < 0.001: # One millisecond
134 return '%10s' % '---b/s'
135 return '%10s' % ('%s/s' % FileDownloader.format_bytes(float(bytes) / dif))
138 def best_block_size(elapsed_time, bytes):
139 new_min = max(bytes / 2.0, 1.0)
140 new_max = min(max(bytes * 2.0, 1.0), 4194304) # Do not surpass 4 MB
141 if elapsed_time < 0.001:
143 rate = bytes / elapsed_time
151 def parse_bytes(bytestr):
152 """Parse a string indicating a byte quantity into a long integer."""
153 matchobj = re.match(r'(?i)^(\d+(?:\.\d+)?)([kMGTPEZY]?)$', bytestr)
156 number = float(matchobj.group(1))
157 multiplier = 1024.0 ** 'bkmgtpezy'.index(matchobj.group(2).lower())
158 return long(round(number * multiplier))
160 def add_info_extractor(self, ie):
161 """Add an InfoExtractor object to the end of the list."""
163 ie.set_downloader(self)
165 def add_post_processor(self, pp):
166 """Add a PostProcessor object to the end of the chain."""
168 pp.set_downloader(self)
170 def to_screen(self, message, skip_eol=False):
171 """Print message to stdout if not in quiet mode."""
172 assert type(message) == type(u'')
173 if not self.params.get('quiet', False):
174 terminator = [u'\n', u''][skip_eol]
175 output = message + terminator
176 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
177 output = output.encode(preferredencoding(), 'ignore')
178 self._screen_file.write(output)
179 self._screen_file.flush()
181 def to_stderr(self, message):
182 """Print message to stderr."""
183 print >>sys.stderr, message.encode(preferredencoding())
185 def to_cons_title(self, message):
186 """Set console/terminal window title to message."""
187 if not self.params.get('consoletitle', False):
189 if os.name == 'nt' and ctypes.windll.kernel32.GetConsoleWindow():
190 # c_wchar_p() might not be necessary if `message` is
191 # already of type unicode()
192 ctypes.windll.kernel32.SetConsoleTitleW(ctypes.c_wchar_p(message))
193 elif 'TERM' in os.environ:
194 sys.stderr.write('\033]0;%s\007' % message.encode(preferredencoding()))
196 def fixed_template(self):
197 """Checks if the output template is fixed."""
198 return (re.search(ur'(?u)%\(.+?\)s', self.params['outtmpl']) is None)
200 def trouble(self, message=None):
201 """Determine action to take when a download problem appears.
203 Depending on if the downloader has been configured to ignore
204 download errors or not, this method may throw an exception or
205 not when errors are found, after printing the message.
207 if message is not None:
208 self.to_stderr(message)
209 if not self.params.get('ignoreerrors', False):
210 raise DownloadError(message)
211 self._download_retcode = 1
213 def slow_down(self, start_time, byte_counter):
214 """Sleep if the download speed is over the rate limit."""
215 rate_limit = self.params.get('ratelimit', None)
216 if rate_limit is None or byte_counter == 0:
219 elapsed = now - start_time
222 speed = float(byte_counter) / elapsed
223 if speed > rate_limit:
224 time.sleep((byte_counter - rate_limit * (now - start_time)) / rate_limit)
226 def temp_name(self, filename):
227 """Returns a temporary filename for the given filename."""
228 if self.params.get('nopart', False) or filename == u'-' or \
229 (os.path.exists(encodeFilename(filename)) and not os.path.isfile(encodeFilename(filename))):
231 return filename + u'.part'
233 def undo_temp_name(self, filename):
234 if filename.endswith(u'.part'):
235 return filename[:-len(u'.part')]
238 def try_rename(self, old_filename, new_filename):
240 if old_filename == new_filename:
242 os.rename(encodeFilename(old_filename), encodeFilename(new_filename))
243 except (IOError, OSError), err:
244 self.trouble(u'ERROR: unable to rename file')
246 def try_utime(self, filename, last_modified_hdr):
247 """Try to set the last-modified time of the given file."""
248 if last_modified_hdr is None:
250 if not os.path.isfile(encodeFilename(filename)):
252 timestr = last_modified_hdr
255 filetime = timeconvert(timestr)
259 os.utime(filename, (time.time(), filetime))
264 def report_writedescription(self, descfn):
265 """ Report that the description file is being written """
266 self.to_screen(u'[info] Writing video description to: ' + descfn)
268 def report_writesubtitles(self, srtfn):
269 """ Report that the subtitles file is being written """
270 self.to_screen(u'[info] Writing video subtitles to: ' + srtfn)
272 def report_writeinfojson(self, infofn):
273 """ Report that the metadata file has been written """
274 self.to_screen(u'[info] Video description metadata as JSON to: ' + infofn)
276 def report_destination(self, filename):
277 """Report destination filename."""
278 self.to_screen(u'[download] Destination: ' + filename)
280 def report_progress(self, percent_str, data_len_str, speed_str, eta_str):
281 """Report download progress."""
282 if self.params.get('noprogress', False):
284 self.to_screen(u'\r[download] %s of %s at %s ETA %s' %
285 (percent_str, data_len_str, speed_str, eta_str), skip_eol=True)
286 self.to_cons_title(u'youtube-dl - %s of %s at %s ETA %s' %
287 (percent_str.strip(), data_len_str.strip(), speed_str.strip(), eta_str.strip()))
289 def report_resuming_byte(self, resume_len):
290 """Report attempt to resume at given byte."""
291 self.to_screen(u'[download] Resuming download at byte %s' % resume_len)
293 def report_retry(self, count, retries):
294 """Report retry in case of HTTP error 5xx"""
295 self.to_screen(u'[download] Got server HTTP error. Retrying (attempt %d of %d)...' % (count, retries))
297 def report_file_already_downloaded(self, file_name):
298 """Report file has already been fully downloaded."""
300 self.to_screen(u'[download] %s has already been downloaded' % file_name)
301 except (UnicodeEncodeError), err:
302 self.to_screen(u'[download] The file has already been downloaded')
304 def report_unable_to_resume(self):
305 """Report it was impossible to resume download."""
306 self.to_screen(u'[download] Unable to resume')
308 def report_finish(self):
309 """Report download finished."""
310 if self.params.get('noprogress', False):
311 self.to_screen(u'[download] Download completed')
315 def increment_downloads(self):
316 """Increment the ordinal that assigns a number to each file."""
317 self._num_downloads += 1
319 def prepare_filename(self, info_dict):
320 """Generate the output filename."""
322 template_dict = dict(info_dict)
323 template_dict['epoch'] = unicode(long(time.time()))
324 template_dict['autonumber'] = unicode('%05d' % self._num_downloads)
325 filename = self.params['outtmpl'] % template_dict
327 except (ValueError, KeyError), err:
328 self.trouble(u'ERROR: invalid system charset or erroneous output template')
331 def _match_entry(self, info_dict):
332 """ Returns None iff the file should be downloaded """
334 title = info_dict['title']
335 matchtitle = self.params.get('matchtitle', False)
336 if matchtitle and not re.search(matchtitle, title, re.IGNORECASE):
337 return u'[download] "' + title + '" title did not match pattern "' + matchtitle + '"'
338 rejecttitle = self.params.get('rejecttitle', False)
339 if rejecttitle and re.search(rejecttitle, title, re.IGNORECASE):
340 return u'"' + title + '" title matched reject pattern "' + rejecttitle + '"'
343 def process_info(self, info_dict):
344 """Process a single dictionary returned by an InfoExtractor."""
346 info_dict['stitle'] = sanitize_filename(info_dict['title'])
348 reason = self._match_entry(info_dict)
349 if reason is not None:
350 self.to_screen(u'[download] ' + reason)
353 max_downloads = self.params.get('max_downloads')
354 if max_downloads is not None:
355 if self._num_downloads > int(max_downloads):
356 raise MaxDownloadsReached()
358 filename = self.prepare_filename(info_dict)
361 if self.params.get('forcetitle', False):
362 print info_dict['title'].encode(preferredencoding(), 'xmlcharrefreplace')
363 if self.params.get('forceurl', False):
364 print info_dict['url'].encode(preferredencoding(), 'xmlcharrefreplace')
365 if self.params.get('forcethumbnail', False) and 'thumbnail' in info_dict:
366 print info_dict['thumbnail'].encode(preferredencoding(), 'xmlcharrefreplace')
367 if self.params.get('forcedescription', False) and 'description' in info_dict:
368 print info_dict['description'].encode(preferredencoding(), 'xmlcharrefreplace')
369 if self.params.get('forcefilename', False) and filename is not None:
370 print filename.encode(preferredencoding(), 'xmlcharrefreplace')
371 if self.params.get('forceformat', False):
372 print info_dict['format'].encode(preferredencoding(), 'xmlcharrefreplace')
374 # Do nothing else if in simulate mode
375 if self.params.get('simulate', False):
382 dn = os.path.dirname(encodeFilename(filename))
383 if dn != '' and not os.path.exists(dn): # dn is already encoded
385 except (OSError, IOError), err:
386 self.trouble(u'ERROR: unable to create directory ' + unicode(err))
389 if self.params.get('writedescription', False):
391 descfn = filename + u'.description'
392 self.report_writedescription(descfn)
393 descfile = open(encodeFilename(descfn), 'wb')
395 descfile.write(info_dict['description'].encode('utf-8'))
398 except (OSError, IOError):
399 self.trouble(u'ERROR: Cannot write description file ' + descfn)
402 if self.params.get('writesubtitles', False) and 'subtitles' in info_dict and info_dict['subtitles']:
403 # subtitles download errors are already managed as troubles in relevant IE
404 # that way it will silently go on when used with unsupporting IE
406 srtfn = filename.rsplit('.', 1)[0] + u'.srt'
407 self.report_writesubtitles(srtfn)
408 srtfile = open(encodeFilename(srtfn), 'wb')
410 srtfile.write(info_dict['subtitles'].encode('utf-8'))
413 except (OSError, IOError):
414 self.trouble(u'ERROR: Cannot write subtitles file ' + descfn)
417 if self.params.get('writeinfojson', False):
418 infofn = filename + u'.info.json'
419 self.report_writeinfojson(infofn)
422 except (NameError,AttributeError):
423 self.trouble(u'ERROR: No JSON encoder found. Update to Python 2.6+, setup a json module, or leave out --write-info-json.')
426 infof = open(encodeFilename(infofn), 'wb')
428 json_info_dict = dict((k,v) for k,v in info_dict.iteritems() if not k in ('urlhandle',))
429 json.dump(json_info_dict, infof)
432 except (OSError, IOError):
433 self.trouble(u'ERROR: Cannot write metadata to JSON file ' + infofn)
436 if not self.params.get('skip_download', False):
437 if self.params.get('nooverwrites', False) and os.path.exists(encodeFilename(filename)):
441 success = self._do_download(filename, info_dict)
442 except (OSError, IOError), err:
443 raise UnavailableVideoError
444 except (urllib2.URLError, httplib.HTTPException, socket.error), err:
445 self.trouble(u'ERROR: unable to download video data: %s' % str(err))
447 except (ContentTooShortError, ), err:
448 self.trouble(u'ERROR: content too short (expected %s bytes and served %s)' % (err.expected, err.downloaded))
453 self.post_process(filename, info_dict)
454 except (PostProcessingError), err:
455 self.trouble(u'ERROR: postprocessing: %s' % str(err))
458 def download(self, url_list):
459 """Download a given list of URLs."""
460 if len(url_list) > 1 and self.fixed_template():
461 raise SameFileError(self.params['outtmpl'])
464 suitable_found = False
466 # Go to next InfoExtractor if not suitable
467 if not ie.suitable(url):
470 # Suitable InfoExtractor found
471 suitable_found = True
473 # Extract information from URL and process it
474 videos = ie.extract(url)
475 for video in videos or []:
476 video['extractor'] = ie.IE_NAME
478 self.increment_downloads()
479 self.process_info(video)
480 except UnavailableVideoError:
481 self.trouble(u'\nERROR: unable to download video')
483 # Suitable InfoExtractor had been found; go to next URL
486 if not suitable_found:
487 self.trouble(u'ERROR: no suitable InfoExtractor: %s' % url)
489 return self._download_retcode
491 def post_process(self, filename, ie_info):
492 """Run the postprocessing chain on the given file."""
494 info['filepath'] = filename
500 def _download_with_rtmpdump(self, filename, url, player_url):
501 self.report_destination(filename)
502 tmpfilename = self.temp_name(filename)
504 # Check for rtmpdump first
506 subprocess.call(['rtmpdump', '-h'], stdout=(file(os.path.devnull, 'w')), stderr=subprocess.STDOUT)
507 except (OSError, IOError):
508 self.trouble(u'ERROR: RTMP download detected but "rtmpdump" could not be run')
511 # Download using rtmpdump. rtmpdump returns exit code 2 when
512 # the connection was interrumpted and resuming appears to be
513 # possible. This is part of rtmpdump's normal usage, AFAIK.
514 basic_args = ['rtmpdump', '-q'] + [[], ['-W', player_url]][player_url is not None] + ['-r', url, '-o', tmpfilename]
515 args = basic_args + [[], ['-e', '-k', '1']][self.params.get('continuedl', False)]
516 if self.params.get('verbose', False):
519 shell_quote = lambda args: ' '.join(map(pipes.quote, args))
522 self.to_screen(u'[debug] rtmpdump command line: ' + shell_quote(args))
523 retval = subprocess.call(args)
524 while retval == 2 or retval == 1:
525 prevsize = os.path.getsize(encodeFilename(tmpfilename))
526 self.to_screen(u'\r[rtmpdump] %s bytes' % prevsize, skip_eol=True)
527 time.sleep(5.0) # This seems to be needed
528 retval = subprocess.call(basic_args + ['-e'] + [[], ['-k', '1']][retval == 1])
529 cursize = os.path.getsize(encodeFilename(tmpfilename))
530 if prevsize == cursize and retval == 1:
532 # Some rtmp streams seem abort after ~ 99.8%. Don't complain for those
533 if prevsize == cursize and retval == 2 and cursize > 1024:
534 self.to_screen(u'\r[rtmpdump] Could not download the whole video. This can happen for some advertisements.')
538 self.to_screen(u'\r[rtmpdump] %s bytes' % os.path.getsize(encodeFilename(tmpfilename)))
539 self.try_rename(tmpfilename, filename)
542 self.trouble(u'\nERROR: rtmpdump exited with code %d' % retval)
545 def _do_download(self, filename, info_dict):
546 url = info_dict['url']
547 player_url = info_dict.get('player_url', None)
549 # Check file already present
550 if self.params.get('continuedl', False) and os.path.isfile(encodeFilename(filename)) and not self.params.get('nopart', False):
551 self.report_file_already_downloaded(filename)
554 # Attempt to download using rtmpdump
555 if url.startswith('rtmp'):
556 return self._download_with_rtmpdump(filename, url, player_url)
558 tmpfilename = self.temp_name(filename)
561 # Do not include the Accept-Encoding header
562 headers = {'Youtubedl-no-compression': 'True'}
563 basic_request = urllib2.Request(url, None, headers)
564 request = urllib2.Request(url, None, headers)
566 # Establish possible resume length
567 if os.path.isfile(encodeFilename(tmpfilename)):
568 resume_len = os.path.getsize(encodeFilename(tmpfilename))
574 if self.params.get('continuedl', False):
575 self.report_resuming_byte(resume_len)
576 request.add_header('Range','bytes=%d-' % resume_len)
582 retries = self.params.get('retries', 0)
583 while count <= retries:
584 # Establish connection
586 if count == 0 and 'urlhandle' in info_dict:
587 data = info_dict['urlhandle']
588 data = urllib2.urlopen(request)
590 except (urllib2.HTTPError, ), err:
591 if (err.code < 500 or err.code >= 600) and err.code != 416:
592 # Unexpected HTTP error
594 elif err.code == 416:
595 # Unable to resume (requested range not satisfiable)
597 # Open the connection again without the range header
598 data = urllib2.urlopen(basic_request)
599 content_length = data.info()['Content-Length']
600 except (urllib2.HTTPError, ), err:
601 if err.code < 500 or err.code >= 600:
604 # Examine the reported length
605 if (content_length is not None and
606 (resume_len - 100 < long(content_length) < resume_len + 100)):
607 # The file had already been fully downloaded.
608 # Explanation to the above condition: in issue #175 it was revealed that
609 # YouTube sometimes adds or removes a few bytes from the end of the file,
610 # changing the file size slightly and causing problems for some users. So
611 # I decided to implement a suggested change and consider the file
612 # completely downloaded if the file size differs less than 100 bytes from
613 # the one in the hard drive.
614 self.report_file_already_downloaded(filename)
615 self.try_rename(tmpfilename, filename)
618 # The length does not match, we start the download over
619 self.report_unable_to_resume()
625 self.report_retry(count, retries)
628 self.trouble(u'ERROR: giving up after %s retries' % retries)
631 data_len = data.info().get('Content-length', None)
632 if data_len is not None:
633 data_len = long(data_len) + resume_len
634 data_len_str = self.format_bytes(data_len)
635 byte_counter = 0 + resume_len
641 data_block = data.read(block_size)
643 if len(data_block) == 0:
645 byte_counter += len(data_block)
647 # Open file just in time
650 (stream, tmpfilename) = sanitize_open(tmpfilename, open_mode)
651 assert stream is not None
652 filename = self.undo_temp_name(tmpfilename)
653 self.report_destination(filename)
654 except (OSError, IOError), err:
655 self.trouble(u'ERROR: unable to open for writing: %s' % str(err))
658 stream.write(data_block)
659 except (IOError, OSError), err:
660 self.trouble(u'\nERROR: unable to write data: %s' % str(err))
662 block_size = self.best_block_size(after - before, len(data_block))
665 speed_str = self.calc_speed(start, time.time(), byte_counter - resume_len)
667 self.report_progress('Unknown %', data_len_str, speed_str, 'Unknown ETA')
669 percent_str = self.calc_percent(byte_counter, data_len)
670 eta_str = self.calc_eta(start, time.time(), data_len - resume_len, byte_counter - resume_len)
671 self.report_progress(percent_str, data_len_str, speed_str, eta_str)
674 self.slow_down(start, byte_counter - resume_len)
677 self.trouble(u'\nERROR: Did not get any data blocks')
681 if data_len is not None and byte_counter != data_len:
682 raise ContentTooShortError(byte_counter, long(data_len))
683 self.try_rename(tmpfilename, filename)
685 # Update file modification time
686 if self.params.get('updatetime', True):
687 info_dict['filetime'] = self.try_utime(filename, data.info().get('last-modified', None))