mirror of
https://github.com/ytdl-org/youtube-dl.git
synced 2024-11-17 20:37:21 +01:00
588 lines
24 KiB
Python
588 lines
24 KiB
Python
import math
|
|
import os
|
|
import re
|
|
import subprocess
|
|
import sys
|
|
import time
|
|
import traceback
|
|
|
|
if os.name == 'nt':
|
|
import ctypes
|
|
|
|
from .utils import *
|
|
|
|
|
|
class FileDownloader(object):
|
|
"""File Downloader class.
|
|
|
|
File downloader objects are the ones responsible of downloading the
|
|
actual video file and writing it to disk.
|
|
|
|
File downloaders accept a lot of parameters. In order not to saturate
|
|
the object constructor with arguments, it receives a dictionary of
|
|
options instead.
|
|
|
|
Available options:
|
|
|
|
verbose: Print additional info to stdout.
|
|
quiet: Do not print messages to stdout.
|
|
ratelimit: Download speed limit, in bytes/sec.
|
|
retries: Number of times to retry for HTTP error 5xx
|
|
buffersize: Size of download buffer in bytes.
|
|
noresizebuffer: Do not automatically resize the download buffer.
|
|
continuedl: Try to continue downloads if possible.
|
|
noprogress: Do not print the progress bar.
|
|
logtostderr: Log messages to stderr instead of stdout.
|
|
consoletitle: Display progress in console window's titlebar.
|
|
nopart: Do not use temporary .part files.
|
|
updatetime: Use the Last-modified header to set output file timestamps.
|
|
test: Download only first bytes to test the downloader.
|
|
min_filesize: Skip files smaller than this size
|
|
max_filesize: Skip files larger than this size
|
|
"""
|
|
|
|
params = None
|
|
|
|
def __init__(self, ydl, params):
|
|
"""Create a FileDownloader object with the given options."""
|
|
self.ydl = ydl
|
|
self._progress_hooks = []
|
|
self.params = params
|
|
|
|
@staticmethod
|
|
def format_bytes(bytes):
|
|
if bytes is None:
|
|
return 'N/A'
|
|
if type(bytes) is str:
|
|
bytes = float(bytes)
|
|
if bytes == 0.0:
|
|
exponent = 0
|
|
else:
|
|
exponent = int(math.log(bytes, 1024.0))
|
|
suffix = ['B','KiB','MiB','GiB','TiB','PiB','EiB','ZiB','YiB'][exponent]
|
|
converted = float(bytes) / float(1024 ** exponent)
|
|
return '%.2f%s' % (converted, suffix)
|
|
|
|
@staticmethod
|
|
def format_seconds(seconds):
|
|
(mins, secs) = divmod(seconds, 60)
|
|
(hours, mins) = divmod(mins, 60)
|
|
if hours > 99:
|
|
return '--:--:--'
|
|
if hours == 0:
|
|
return '%02d:%02d' % (mins, secs)
|
|
else:
|
|
return '%02d:%02d:%02d' % (hours, mins, secs)
|
|
|
|
@staticmethod
|
|
def calc_percent(byte_counter, data_len):
|
|
if data_len is None:
|
|
return '---.-%'
|
|
return '%6s' % ('%3.1f%%' % (float(byte_counter) / float(data_len) * 100.0))
|
|
|
|
@staticmethod
|
|
def calc_eta(start, now, total, current):
|
|
if total is None:
|
|
return '--:--'
|
|
dif = now - start
|
|
if current == 0 or dif < 0.001: # One millisecond
|
|
return '--:--'
|
|
rate = float(current) / dif
|
|
eta = int((float(total) - float(current)) / rate)
|
|
return FileDownloader.format_seconds(eta)
|
|
|
|
@staticmethod
|
|
def calc_speed(start, now, bytes):
|
|
dif = now - start
|
|
if bytes == 0 or dif < 0.001: # One millisecond
|
|
return '%10s' % '---b/s'
|
|
return '%10s' % ('%s/s' % FileDownloader.format_bytes(float(bytes) / dif))
|
|
|
|
@staticmethod
|
|
def best_block_size(elapsed_time, bytes):
|
|
new_min = max(bytes / 2.0, 1.0)
|
|
new_max = min(max(bytes * 2.0, 1.0), 4194304) # Do not surpass 4 MB
|
|
if elapsed_time < 0.001:
|
|
return int(new_max)
|
|
rate = bytes / elapsed_time
|
|
if rate > new_max:
|
|
return int(new_max)
|
|
if rate < new_min:
|
|
return int(new_min)
|
|
return int(rate)
|
|
|
|
@staticmethod
|
|
def parse_bytes(bytestr):
|
|
"""Parse a string indicating a byte quantity into an integer."""
|
|
matchobj = re.match(r'(?i)^(\d+(?:\.\d+)?)([kMGTPEZY]?)$', bytestr)
|
|
if matchobj is None:
|
|
return None
|
|
number = float(matchobj.group(1))
|
|
multiplier = 1024.0 ** 'bkmgtpezy'.index(matchobj.group(2).lower())
|
|
return int(round(number * multiplier))
|
|
|
|
def to_screen(self, *args, **kargs):
|
|
self.ydl.to_screen(*args, **kargs)
|
|
|
|
def to_stderr(self, message):
|
|
self.ydl.to_screen(message)
|
|
|
|
def to_cons_title(self, message):
|
|
"""Set console/terminal window title to message."""
|
|
if not self.params.get('consoletitle', False):
|
|
return
|
|
if os.name == 'nt' and ctypes.windll.kernel32.GetConsoleWindow():
|
|
# c_wchar_p() might not be necessary if `message` is
|
|
# already of type unicode()
|
|
ctypes.windll.kernel32.SetConsoleTitleW(ctypes.c_wchar_p(message))
|
|
elif 'TERM' in os.environ:
|
|
self.to_screen('\033]0;%s\007' % message, skip_eol=True)
|
|
|
|
def trouble(self, *args, **kargs):
|
|
self.ydl.trouble(*args, **kargs)
|
|
|
|
def report_warning(self, *args, **kargs):
|
|
self.ydl.report_warning(*args, **kargs)
|
|
|
|
def report_error(self, *args, **kargs):
|
|
self.ydl.report_error(*args, **kargs)
|
|
|
|
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 temp_name(self, filename):
|
|
"""Returns a temporary filename for the given filename."""
|
|
if self.params.get('nopart', False) or filename == u'-' or \
|
|
(os.path.exists(encodeFilename(filename)) and not os.path.isfile(encodeFilename(filename))):
|
|
return filename
|
|
return filename + u'.part'
|
|
|
|
def undo_temp_name(self, filename):
|
|
if filename.endswith(u'.part'):
|
|
return filename[:-len(u'.part')]
|
|
return filename
|
|
|
|
def try_rename(self, old_filename, new_filename):
|
|
try:
|
|
if old_filename == new_filename:
|
|
return
|
|
os.rename(encodeFilename(old_filename), encodeFilename(new_filename))
|
|
except (IOError, OSError) as err:
|
|
self.report_error(u'unable to rename file')
|
|
|
|
def try_utime(self, filename, last_modified_hdr):
|
|
"""Try to set the last-modified time of the given file."""
|
|
if last_modified_hdr is None:
|
|
return
|
|
if not os.path.isfile(encodeFilename(filename)):
|
|
return
|
|
timestr = last_modified_hdr
|
|
if timestr is None:
|
|
return
|
|
filetime = timeconvert(timestr)
|
|
if filetime is None:
|
|
return filetime
|
|
# Ignore obviously invalid dates
|
|
if filetime == 0:
|
|
return
|
|
try:
|
|
os.utime(filename, (time.time(), filetime))
|
|
except:
|
|
pass
|
|
return filetime
|
|
|
|
def report_destination(self, filename):
|
|
"""Report destination filename."""
|
|
self.to_screen(u'[download] Destination: ' + filename)
|
|
|
|
def report_progress(self, percent_str, data_len_str, speed_str, eta_str):
|
|
"""Report download progress."""
|
|
if self.params.get('noprogress', False):
|
|
return
|
|
clear_line = (u'\x1b[K' if sys.stderr.isatty() and os.name != 'nt' else u'')
|
|
if self.params.get('progress_with_newline', False):
|
|
self.to_screen(u'[download] %s of %s at %s ETA %s' %
|
|
(percent_str, data_len_str, speed_str, eta_str))
|
|
else:
|
|
self.to_screen(u'\r%s[download] %s of %s at %s ETA %s' %
|
|
(clear_line, percent_str, data_len_str, speed_str, eta_str), skip_eol=True)
|
|
self.to_cons_title(u'youtube-dl - %s of %s at %s ETA %s' %
|
|
(percent_str.strip(), data_len_str.strip(), speed_str.strip(), eta_str.strip()))
|
|
|
|
def report_resuming_byte(self, resume_len):
|
|
"""Report attempt to resume at given byte."""
|
|
self.to_screen(u'[download] Resuming download at byte %s' % resume_len)
|
|
|
|
def report_retry(self, count, retries):
|
|
"""Report retry in case of HTTP error 5xx"""
|
|
self.to_screen(u'[download] Got server HTTP error. Retrying (attempt %d of %d)...' % (count, retries))
|
|
|
|
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 report_unable_to_resume(self):
|
|
"""Report it was impossible to resume download."""
|
|
self.to_screen(u'[download] Unable to resume')
|
|
|
|
def report_finish(self, data_len_str, tot_time):
|
|
"""Report download finished."""
|
|
if self.params.get('noprogress', False):
|
|
self.to_screen(u'[download] Download completed')
|
|
else:
|
|
clear_line = (u'\x1b[K' if sys.stderr.isatty() and os.name != 'nt' else u'')
|
|
self.to_screen(u'\r%s[download] 100%% of %s in %s' %
|
|
(clear_line, data_len_str, self.format_seconds(tot_time)))
|
|
|
|
def _download_with_rtmpdump(self, filename, url, player_url, page_url, play_path, tc_url):
|
|
self.report_destination(filename)
|
|
tmpfilename = self.temp_name(filename)
|
|
|
|
# Check for rtmpdump first
|
|
try:
|
|
subprocess.call(['rtmpdump', '-h'], stdout=(open(os.path.devnull, 'w')), stderr=subprocess.STDOUT)
|
|
except (OSError, IOError):
|
|
self.report_error(u'RTMP download detected but "rtmpdump" could not be run')
|
|
return False
|
|
verbosity_option = '--verbose' if self.params.get('verbose', False) else '--quiet'
|
|
|
|
# Download using rtmpdump. rtmpdump returns exit code 2 when
|
|
# the connection was interrumpted and resuming appears to be
|
|
# possible. This is part of rtmpdump's normal usage, AFAIK.
|
|
basic_args = ['rtmpdump', verbosity_option, '-r', url, '-o', tmpfilename]
|
|
if player_url is not None:
|
|
basic_args += ['--swfVfy', player_url]
|
|
if page_url is not None:
|
|
basic_args += ['--pageUrl', page_url]
|
|
if play_path is not None:
|
|
basic_args += ['--playpath', play_path]
|
|
if tc_url is not None:
|
|
basic_args += ['--tcUrl', url]
|
|
args = basic_args + [[], ['--resume', '--skip', '1']][self.params.get('continuedl', False)]
|
|
if self.params.get('verbose', False):
|
|
try:
|
|
import pipes
|
|
shell_quote = lambda args: ' '.join(map(pipes.quote, args))
|
|
except ImportError:
|
|
shell_quote = repr
|
|
self.to_screen(u'[debug] rtmpdump command line: ' + shell_quote(args))
|
|
retval = subprocess.call(args)
|
|
while retval == 2 or retval == 1:
|
|
prevsize = os.path.getsize(encodeFilename(tmpfilename))
|
|
self.to_screen(u'\r[rtmpdump] %s bytes' % prevsize, skip_eol=True)
|
|
time.sleep(5.0) # This seems to be needed
|
|
retval = subprocess.call(basic_args + ['-e'] + [[], ['-k', '1']][retval == 1])
|
|
cursize = os.path.getsize(encodeFilename(tmpfilename))
|
|
if prevsize == cursize and retval == 1:
|
|
break
|
|
# Some rtmp streams seem abort after ~ 99.8%. Don't complain for those
|
|
if prevsize == cursize and retval == 2 and cursize > 1024:
|
|
self.to_screen(u'\r[rtmpdump] Could not download the whole video. This can happen for some advertisements.')
|
|
retval = 0
|
|
break
|
|
if retval == 0:
|
|
fsize = os.path.getsize(encodeFilename(tmpfilename))
|
|
self.to_screen(u'\r[rtmpdump] %s bytes' % fsize)
|
|
self.try_rename(tmpfilename, filename)
|
|
self._hook_progress({
|
|
'downloaded_bytes': fsize,
|
|
'total_bytes': fsize,
|
|
'filename': filename,
|
|
'status': 'finished',
|
|
})
|
|
return True
|
|
else:
|
|
self.to_stderr(u"\n")
|
|
self.report_error(u'rtmpdump exited with code %d' % retval)
|
|
return False
|
|
|
|
def _download_with_mplayer(self, filename, url):
|
|
self.report_destination(filename)
|
|
tmpfilename = self.temp_name(filename)
|
|
|
|
args = ['mplayer', '-really-quiet', '-vo', 'null', '-vc', 'dummy', '-dumpstream', '-dumpfile', tmpfilename, url]
|
|
# Check for mplayer first
|
|
try:
|
|
subprocess.call(['mplayer', '-h'], stdout=(open(os.path.devnull, 'w')), stderr=subprocess.STDOUT)
|
|
except (OSError, IOError):
|
|
self.report_error(u'MMS or RTSP download detected but "%s" could not be run' % args[0] )
|
|
return False
|
|
|
|
# Download using mplayer.
|
|
retval = subprocess.call(args)
|
|
if retval == 0:
|
|
fsize = os.path.getsize(encodeFilename(tmpfilename))
|
|
self.to_screen(u'\r[%s] %s bytes' % (args[0], fsize))
|
|
self.try_rename(tmpfilename, filename)
|
|
self._hook_progress({
|
|
'downloaded_bytes': fsize,
|
|
'total_bytes': fsize,
|
|
'filename': filename,
|
|
'status': 'finished',
|
|
})
|
|
return True
|
|
else:
|
|
self.to_stderr(u"\n")
|
|
self.report_error(u'mplayer exited with code %d' % retval)
|
|
return False
|
|
|
|
def _download_m3u8_with_ffmpeg(self, filename, url):
|
|
self.report_destination(filename)
|
|
tmpfilename = self.temp_name(filename)
|
|
|
|
args = ['ffmpeg', '-y', '-i', url, '-f', 'mp4', tmpfilename]
|
|
# Check for ffmpeg first
|
|
try:
|
|
subprocess.call(['ffmpeg', '-h'], stdout=(open(os.path.devnull, 'w')), stderr=subprocess.STDOUT)
|
|
except (OSError, IOError):
|
|
self.report_error(u'm3u8 download detected but "%s" could not be run' % args[0] )
|
|
return False
|
|
|
|
retval = subprocess.call(args)
|
|
if retval == 0:
|
|
fsize = os.path.getsize(encodeFilename(tmpfilename))
|
|
self.to_screen(u'\r[%s] %s bytes' % (args[0], fsize))
|
|
self.try_rename(tmpfilename, filename)
|
|
self._hook_progress({
|
|
'downloaded_bytes': fsize,
|
|
'total_bytes': fsize,
|
|
'filename': filename,
|
|
'status': 'finished',
|
|
})
|
|
return True
|
|
else:
|
|
self.to_stderr(u"\n")
|
|
self.report_error(u'ffmpeg exited with code %d' % retval)
|
|
return False
|
|
|
|
|
|
def _do_download(self, filename, info_dict):
|
|
url = info_dict['url']
|
|
|
|
# Check file already present
|
|
if self.params.get('continuedl', False) and os.path.isfile(encodeFilename(filename)) and not self.params.get('nopart', False):
|
|
self.report_file_already_downloaded(filename)
|
|
self._hook_progress({
|
|
'filename': filename,
|
|
'status': 'finished',
|
|
})
|
|
return True
|
|
|
|
# Attempt to download using rtmpdump
|
|
if url.startswith('rtmp'):
|
|
return self._download_with_rtmpdump(filename, url,
|
|
info_dict.get('player_url', None),
|
|
info_dict.get('page_url', None),
|
|
info_dict.get('play_path', None),
|
|
info_dict.get('tc_url', None))
|
|
|
|
# Attempt to download using mplayer
|
|
if url.startswith('mms') or url.startswith('rtsp'):
|
|
return self._download_with_mplayer(filename, url)
|
|
|
|
# m3u8 manifest are downloaded with ffmpeg
|
|
if determine_ext(url) == u'm3u8':
|
|
return self._download_m3u8_with_ffmpeg(filename, url)
|
|
|
|
tmpfilename = self.temp_name(filename)
|
|
stream = None
|
|
|
|
# Do not include the Accept-Encoding header
|
|
headers = {'Youtubedl-no-compression': 'True'}
|
|
if 'user_agent' in info_dict:
|
|
headers['Youtubedl-user-agent'] = info_dict['user_agent']
|
|
basic_request = compat_urllib_request.Request(url, None, headers)
|
|
request = compat_urllib_request.Request(url, None, headers)
|
|
|
|
if self.params.get('test', False):
|
|
request.add_header('Range','bytes=0-10240')
|
|
|
|
# Establish possible resume length
|
|
if os.path.isfile(encodeFilename(tmpfilename)):
|
|
resume_len = os.path.getsize(encodeFilename(tmpfilename))
|
|
else:
|
|
resume_len = 0
|
|
|
|
open_mode = 'wb'
|
|
if resume_len != 0:
|
|
if self.params.get('continuedl', False):
|
|
self.report_resuming_byte(resume_len)
|
|
request.add_header('Range','bytes=%d-' % resume_len)
|
|
open_mode = 'ab'
|
|
else:
|
|
resume_len = 0
|
|
|
|
count = 0
|
|
retries = self.params.get('retries', 0)
|
|
while count <= retries:
|
|
# Establish connection
|
|
try:
|
|
if count == 0 and 'urlhandle' in info_dict:
|
|
data = info_dict['urlhandle']
|
|
data = compat_urllib_request.urlopen(request)
|
|
break
|
|
except (compat_urllib_error.HTTPError, ) as err:
|
|
if (err.code < 500 or err.code >= 600) and err.code != 416:
|
|
# Unexpected HTTP error
|
|
raise
|
|
elif err.code == 416:
|
|
# Unable to resume (requested range not satisfiable)
|
|
try:
|
|
# Open the connection again without the range header
|
|
data = compat_urllib_request.urlopen(basic_request)
|
|
content_length = data.info()['Content-Length']
|
|
except (compat_urllib_error.HTTPError, ) as err:
|
|
if err.code < 500 or err.code >= 600:
|
|
raise
|
|
else:
|
|
# Examine the reported length
|
|
if (content_length is not None and
|
|
(resume_len - 100 < int(content_length) < resume_len + 100)):
|
|
# The file had already been fully downloaded.
|
|
# Explanation to the above condition: in issue #175 it was revealed that
|
|
# YouTube sometimes adds or removes a few bytes from the end of the file,
|
|
# changing the file size slightly and causing problems for some users. So
|
|
# I decided to implement a suggested change and consider the file
|
|
# completely downloaded if the file size differs less than 100 bytes from
|
|
# the one in the hard drive.
|
|
self.report_file_already_downloaded(filename)
|
|
self.try_rename(tmpfilename, filename)
|
|
self._hook_progress({
|
|
'filename': filename,
|
|
'status': 'finished',
|
|
})
|
|
return True
|
|
else:
|
|
# The length does not match, we start the download over
|
|
self.report_unable_to_resume()
|
|
open_mode = 'wb'
|
|
break
|
|
# Retry
|
|
count += 1
|
|
if count <= retries:
|
|
self.report_retry(count, retries)
|
|
|
|
if count > retries:
|
|
self.report_error(u'giving up after %s retries' % retries)
|
|
return False
|
|
|
|
data_len = data.info().get('Content-length', None)
|
|
if data_len is not None:
|
|
data_len = int(data_len) + resume_len
|
|
min_data_len = self.params.get("min_filesize", None)
|
|
max_data_len = self.params.get("max_filesize", None)
|
|
if min_data_len is not None and data_len < min_data_len:
|
|
self.to_screen(u'\r[download] File is smaller than min-filesize (%s bytes < %s bytes). Aborting.' % (data_len, min_data_len))
|
|
return False
|
|
if max_data_len is not None and data_len > max_data_len:
|
|
self.to_screen(u'\r[download] File is larger than max-filesize (%s bytes > %s bytes). Aborting.' % (data_len, max_data_len))
|
|
return False
|
|
|
|
data_len_str = self.format_bytes(data_len)
|
|
byte_counter = 0 + resume_len
|
|
block_size = self.params.get('buffersize', 1024)
|
|
start = time.time()
|
|
while True:
|
|
# Download and write
|
|
before = time.time()
|
|
data_block = data.read(block_size)
|
|
after = time.time()
|
|
if len(data_block) == 0:
|
|
break
|
|
byte_counter += len(data_block)
|
|
|
|
# Open file just in time
|
|
if stream is None:
|
|
try:
|
|
(stream, tmpfilename) = sanitize_open(tmpfilename, open_mode)
|
|
assert stream is not None
|
|
filename = self.undo_temp_name(tmpfilename)
|
|
self.report_destination(filename)
|
|
except (OSError, IOError) as err:
|
|
self.report_error(u'unable to open for writing: %s' % str(err))
|
|
return False
|
|
try:
|
|
stream.write(data_block)
|
|
except (IOError, OSError) as err:
|
|
self.to_stderr(u"\n")
|
|
self.report_error(u'unable to write data: %s' % str(err))
|
|
return False
|
|
if not self.params.get('noresizebuffer', False):
|
|
block_size = self.best_block_size(after - before, len(data_block))
|
|
|
|
# Progress message
|
|
speed_str = self.calc_speed(start, time.time(), byte_counter - resume_len)
|
|
if data_len is None:
|
|
self.report_progress('Unknown %', data_len_str, speed_str, 'Unknown ETA')
|
|
else:
|
|
percent_str = self.calc_percent(byte_counter, data_len)
|
|
eta_str = self.calc_eta(start, time.time(), data_len - resume_len, byte_counter - resume_len)
|
|
self.report_progress(percent_str, data_len_str, speed_str, eta_str)
|
|
|
|
self._hook_progress({
|
|
'downloaded_bytes': byte_counter,
|
|
'total_bytes': data_len,
|
|
'tmpfilename': tmpfilename,
|
|
'filename': filename,
|
|
'status': 'downloading',
|
|
})
|
|
|
|
# Apply rate limit
|
|
self.slow_down(start, byte_counter - resume_len)
|
|
|
|
if stream is None:
|
|
self.to_stderr(u"\n")
|
|
self.report_error(u'Did not get any data blocks')
|
|
return False
|
|
stream.close()
|
|
self.report_finish(data_len_str, (time.time() - start))
|
|
if data_len is not None and byte_counter != data_len:
|
|
raise ContentTooShortError(byte_counter, int(data_len))
|
|
self.try_rename(tmpfilename, filename)
|
|
|
|
# Update file modification time
|
|
if self.params.get('updatetime', True):
|
|
info_dict['filetime'] = self.try_utime(filename, data.info().get('last-modified', None))
|
|
|
|
self._hook_progress({
|
|
'downloaded_bytes': byte_counter,
|
|
'total_bytes': byte_counter,
|
|
'filename': filename,
|
|
'status': 'finished',
|
|
})
|
|
|
|
return True
|
|
|
|
def _hook_progress(self, status):
|
|
for ph in self._progress_hooks:
|
|
ph(status)
|
|
|
|
def add_progress_hook(self, ph):
|
|
""" ph gets called on download progress, with a dictionary with the entries
|
|
* filename: The final filename
|
|
* status: One of "downloading" and "finished"
|
|
|
|
It can also have some of the following entries:
|
|
|
|
* downloaded_bytes: Bytes on disks
|
|
* total_bytes: Total bytes, None if unknown
|
|
* tmpfilename: The filename we're currently writing to
|
|
|
|
Hooks are guaranteed to be called at least once (with status "finished")
|
|
if the download is successful.
|
|
"""
|
|
self._progress_hooks.append(ph)
|