13 class FileDownloader(object):
14 """File Downloader class.
16 File downloader objects are the ones responsible of downloading the
17 actual video file and writing it to disk.
19 File downloaders accept a lot of parameters. In order not to saturate
20 the object constructor with arguments, it receives a dictionary of
25 verbose: Print additional info to stdout.
26 quiet: Do not print messages to stdout.
27 ratelimit: Download speed limit, in bytes/sec.
28 retries: Number of times to retry for HTTP error 5xx
29 buffersize: Size of download buffer in bytes.
30 noresizebuffer: Do not automatically resize the download buffer.
31 continuedl: Try to continue downloads if possible.
32 noprogress: Do not print the progress bar.
33 logtostderr: Log messages to stderr instead of stdout.
34 consoletitle: Display progress in console window's titlebar.
35 nopart: Do not use temporary .part files.
36 updatetime: Use the Last-modified header to set output file timestamps.
37 test: Download only first bytes to test the downloader.
38 min_filesize: Skip files smaller than this size
39 max_filesize: Skip files larger than this size
41 Subclasses of this one must re-define the real_download method.
46 def __init__(self, ydl, params):
47 """Create a FileDownloader object with the given options."""
49 self._progress_hooks = []
53 def format_seconds(seconds):
54 (mins, secs) = divmod(seconds, 60)
55 (hours, mins) = divmod(mins, 60)
59 return '%02d:%02d' % (mins, secs)
61 return '%02d:%02d:%02d' % (hours, mins, secs)
64 def calc_percent(byte_counter, data_len):
67 return float(byte_counter) / float(data_len) * 100.0
70 def format_percent(percent):
73 return '%6s' % ('%3.1f%%' % percent)
76 def calc_eta(start, now, total, current):
80 if current == 0 or dif < 0.001: # One millisecond
82 rate = float(current) / dif
83 return int((float(total) - float(current)) / rate)
89 return FileDownloader.format_seconds(eta)
92 def calc_speed(start, now, bytes):
94 if bytes == 0 or dif < 0.001: # One millisecond
96 return float(bytes) / dif
99 def format_speed(speed):
101 return '%10s' % '---b/s'
102 return '%10s' % ('%s/s' % format_bytes(speed))
105 def best_block_size(elapsed_time, bytes):
106 new_min = max(bytes / 2.0, 1.0)
107 new_max = min(max(bytes * 2.0, 1.0), 4194304) # Do not surpass 4 MB
108 if elapsed_time < 0.001:
110 rate = bytes / elapsed_time
118 def parse_bytes(bytestr):
119 """Parse a string indicating a byte quantity into an integer."""
120 matchobj = re.match(r'(?i)^(\d+(?:\.\d+)?)([kMGTPEZY]?)$', bytestr)
123 number = float(matchobj.group(1))
124 multiplier = 1024.0 ** 'bkmgtpezy'.index(matchobj.group(2).lower())
125 return int(round(number * multiplier))
127 def to_screen(self, *args, **kargs):
128 self.ydl.to_screen(*args, **kargs)
130 def to_stderr(self, message):
131 self.ydl.to_screen(message)
133 def to_console_title(self, message):
134 self.ydl.to_console_title(message)
136 def trouble(self, *args, **kargs):
137 self.ydl.trouble(*args, **kargs)
139 def report_warning(self, *args, **kargs):
140 self.ydl.report_warning(*args, **kargs)
142 def report_error(self, *args, **kargs):
143 self.ydl.report_error(*args, **kargs)
145 def slow_down(self, start_time, byte_counter):
146 """Sleep if the download speed is over the rate limit."""
147 rate_limit = self.params.get('ratelimit', None)
148 if rate_limit is None or byte_counter == 0:
151 elapsed = now - start_time
154 speed = float(byte_counter) / elapsed
155 if speed > rate_limit:
156 time.sleep((byte_counter - rate_limit * (now - start_time)) / rate_limit)
158 def temp_name(self, filename):
159 """Returns a temporary filename for the given filename."""
160 if self.params.get('nopart', False) or filename == u'-' or \
161 (os.path.exists(encodeFilename(filename)) and not os.path.isfile(encodeFilename(filename))):
163 return filename + u'.part'
165 def undo_temp_name(self, filename):
166 if filename.endswith(u'.part'):
167 return filename[:-len(u'.part')]
170 def try_rename(self, old_filename, new_filename):
172 if old_filename == new_filename:
174 os.rename(encodeFilename(old_filename), encodeFilename(new_filename))
175 except (IOError, OSError) as err:
176 self.report_error(u'unable to rename file: %s' % str(err))
178 def try_utime(self, filename, last_modified_hdr):
179 """Try to set the last-modified time of the given file."""
180 if last_modified_hdr is None:
182 if not os.path.isfile(encodeFilename(filename)):
184 timestr = last_modified_hdr
187 filetime = timeconvert(timestr)
190 # Ignore obviously invalid dates
194 os.utime(filename, (time.time(), filetime))
199 def report_destination(self, filename):
200 """Report destination filename."""
201 self.to_screen(u'[download] Destination: ' + filename)
203 def _report_progress_status(self, msg, is_last_line=False):
204 fullmsg = u'[download] ' + msg
205 if self.params.get('progress_with_newline', False):
206 self.to_screen(fullmsg)
209 prev_len = getattr(self, '_report_progress_prev_line_length',
211 if prev_len > len(fullmsg):
212 fullmsg += u' ' * (prev_len - len(fullmsg))
213 self._report_progress_prev_line_length = len(fullmsg)
216 clear_line = (u'\r\x1b[K' if sys.stderr.isatty() else u'\r')
217 self.to_screen(clear_line + fullmsg, skip_eol=not is_last_line)
218 self.to_console_title(u'youtube-dl ' + msg)
220 def report_progress(self, percent, data_len_str, speed, eta):
221 """Report download progress."""
222 if self.params.get('noprogress', False):
225 eta_str = self.format_eta(eta)
227 eta_str = 'Unknown ETA'
228 if percent is not None:
229 percent_str = self.format_percent(percent)
231 percent_str = 'Unknown %'
232 speed_str = self.format_speed(speed)
234 msg = (u'%s of %s at %s ETA %s' %
235 (percent_str, data_len_str, speed_str, eta_str))
236 self._report_progress_status(msg)
238 def report_progress_live_stream(self, downloaded_data_len, speed, elapsed):
239 if self.params.get('noprogress', False):
241 downloaded_str = format_bytes(downloaded_data_len)
242 speed_str = self.format_speed(speed)
243 elapsed_str = FileDownloader.format_seconds(elapsed)
244 msg = u'%s at %s (%s)' % (downloaded_str, speed_str, elapsed_str)
245 self._report_progress_status(msg)
247 def report_finish(self, data_len_str, tot_time):
248 """Report download finished."""
249 if self.params.get('noprogress', False):
250 self.to_screen(u'[download] Download completed')
252 self._report_progress_status(
253 (u'100%% of %s in %s' %
254 (data_len_str, self.format_seconds(tot_time))),
257 def report_resuming_byte(self, resume_len):
258 """Report attempt to resume at given byte."""
259 self.to_screen(u'[download] Resuming download at byte %s' % resume_len)
261 def report_retry(self, count, retries):
262 """Report retry in case of HTTP error 5xx"""
263 self.to_screen(u'[download] Got server HTTP error. Retrying (attempt %d of %d)...' % (count, retries))
265 def report_file_already_downloaded(self, file_name):
266 """Report file has already been fully downloaded."""
268 self.to_screen(u'[download] %s has already been downloaded' % file_name)
269 except UnicodeEncodeError:
270 self.to_screen(u'[download] The file has already been downloaded')
272 def report_unable_to_resume(self):
273 """Report it was impossible to resume download."""
274 self.to_screen(u'[download] Unable to resume')
276 def download(self, filename, info_dict):
277 """Download to a filename using the info from info_dict
278 Return True on success and False otherwise
280 # Check file already present
281 if self.params.get('continuedl', False) and os.path.isfile(encodeFilename(filename)) and not self.params.get('nopart', False):
282 self.report_file_already_downloaded(filename)
283 self._hook_progress({
284 'filename': filename,
285 'status': 'finished',
286 'total_bytes': os.path.getsize(encodeFilename(filename)),
290 return self.real_download(filename, info_dict)
292 def real_download(self, filename, info_dict):
293 """Real download process. Redefine in subclasses."""
294 raise NotImplementedError(u'This method must be implemented by sublcasses')
296 def _hook_progress(self, status):
297 for ph in self._progress_hooks:
300 def add_progress_hook(self, ph):
301 """ ph gets called on download progress, with a dictionary with the entries
302 * filename: The final filename
303 * status: One of "downloading" and "finished"
305 It can also have some of the following entries:
307 * downloaded_bytes: Bytes on disks
308 * total_bytes: Total bytes, None if unknown
309 * tmpfilename: The filename we're currently writing to
310 * eta: The estimated time in seconds, None if unknown
311 * speed: The download speed in bytes/second, None if unknown
313 Hooks are guaranteed to be called at least once (with status "finished")
314 if the download is successful.
316 self._progress_hooks.append(ph)