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Move FileDownloader to its own module and create a new class for each download process

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A suitable downloader can be found using the 'get_suitable_downloader' function.

Each subclass implements 'real_download', for downloading an info dict you call the 'download' method, which first checks if the video has already been downloaded
This commit is contained in:
Jaime Marquínez Ferrándiz 2013-09-23 17:59:27 +02:00
parent 8ab470f1b2
commit 3bc2ddccc8
9 changed files with 808 additions and 724 deletions
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2
setup.py
View File

@ -71,7 +71,7 @@
author_email='ytdl@yt-dl.org',
maintainer='Philipp Hagemeister',
maintainer_email='phihag@phihag.de',
packages=['youtube_dl', 'youtube_dl.extractor'],
packages=['youtube_dl', 'youtube_dl.extractor', 'youtube_dl.downloader'],
# Provokes warning on most systems (why?!)
# test_suite = 'nose.collector',

728
youtube_dl/FileDownloader.py
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@ -1,724 +1,12 @@
import os
import re
import subprocess
import sys
import time
from .utils import (
compat_urllib_error,
compat_urllib_request,
ContentTooShortError,
determine_ext,
encodeFilename,
format_bytes,
sanitize_open,
timeconvert,
)
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_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 None
return float(byte_counter) / float(data_len) * 100.0
@staticmethod
def format_percent(percent):
if percent is None:
return '---.-%'
return '%6s' % ('%3.1f%%' % percent)
@staticmethod
def calc_eta(start, now, total, current):
if total is None:
return None
dif = now - start
if current == 0 or dif < 0.001: # One millisecond
return None
rate = float(current) / dif
return int((float(total) - float(current)) / rate)
@staticmethod
def format_eta(eta):
if eta is None:
return '--:--'
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 None
return float(bytes) / dif
@staticmethod
def format_speed(speed):
if speed is None:
return '%10s' % '---b/s'
return '%10s' % ('%s/s' % format_bytes(speed))
@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_console_title(self, message):
self.ydl.to_console_title(message)
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):
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_status(self, msg, is_last_line=False):
fullmsg = u'[download] ' + msg
if self.params.get('progress_with_newline', False):
self.to_screen(fullmsg)
else:
if os.name == 'nt':
prev_len = getattr(self, '_report_progress_prev_line_length',
0)
if prev_len > len(fullmsg):
fullmsg += u' ' * (prev_len - len(fullmsg))
self._report_progress_prev_line_length = len(fullmsg)
clear_line = u'\r'
else:
clear_line = (u'\r\x1b[K' if sys.stderr.isatty() else u'\r')
self.to_screen(clear_line + fullmsg, skip_eol=not is_last_line)
self.to_console_title(u'youtube-dl ' + msg)
def report_progress(self, percent, data_len_str, speed, eta):
"""Report download progress."""
if self.params.get('noprogress', False):
return
if eta is not None:
eta_str = self.format_eta(eta)
else:
eta_str = 'Unknown ETA'
if percent is not None:
percent_str = self.format_percent(percent)
else:
percent_str = 'Unknown %'
speed_str = self.format_speed(speed)
msg = (u'%s of %s at %s ETA %s' %
(percent_str, data_len_str, speed_str, eta_str))
self._report_progress_status(msg)
def report_progress_live_stream(self, downloaded_data_len, speed, elapsed):
if self.params.get('noprogress', False):
return
downloaded_str = format_bytes(downloaded_data_len)
speed_str = self.format_speed(speed)
elapsed_str = FileDownloader.format_seconds(elapsed)
msg = u'%s at %s (%s)' % (downloaded_str, speed_str, elapsed_str)
self._report_progress_status(msg)
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:
self._report_progress_status(
(u'100%% of %s in %s' %
(data_len_str, self.format_seconds(tot_time))),
is_last_line=True)
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:
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 _download_with_rtmpdump(self, filename, url, player_url, page_url, play_path, tc_url, live, conn):
def run_rtmpdump(args):
start = time.time()
resume_percent = None
resume_downloaded_data_len = None
proc = subprocess.Popen(args, stderr=subprocess.PIPE)
cursor_in_new_line = True
proc_stderr_closed = False
while not proc_stderr_closed:
# read line from stderr
line = u''
while True:
char = proc.stderr.read(1)
if not char:
proc_stderr_closed = True
break
if char in [b'\r', b'\n']:
break
line += char.decode('ascii', 'replace')
if not line:
# proc_stderr_closed is True
continue
mobj = re.search(r'([0-9]+\.[0-9]{3}) kB / [0-9]+\.[0-9]{2} sec \(([0-9]{1,2}\.[0-9])%\)', line)
if mobj:
downloaded_data_len = int(float(mobj.group(1))*1024)
percent = float(mobj.group(2))
if not resume_percent:
resume_percent = percent
resume_downloaded_data_len = downloaded_data_len
eta = self.calc_eta(start, time.time(), 100-resume_percent, percent-resume_percent)
speed = self.calc_speed(start, time.time(), downloaded_data_len-resume_downloaded_data_len)
data_len = None
if percent > 0:
data_len = int(downloaded_data_len * 100 / percent)
data_len_str = u'~' + format_bytes(data_len)
self.report_progress(percent, data_len_str, speed, eta)
cursor_in_new_line = False
self._hook_progress({
'downloaded_bytes': downloaded_data_len,
'total_bytes': data_len,
'tmpfilename': tmpfilename,
'filename': filename,
'status': 'downloading',
'eta': eta,
'speed': speed,
})
else:
# no percent for live streams
mobj = re.search(r'([0-9]+\.[0-9]{3}) kB / [0-9]+\.[0-9]{2} sec', line)
if mobj:
downloaded_data_len = int(float(mobj.group(1))*1024)
time_now = time.time()
speed = self.calc_speed(start, time_now, downloaded_data_len)
self.report_progress_live_stream(downloaded_data_len, speed, time_now - start)
cursor_in_new_line = False
self._hook_progress({
'downloaded_bytes': downloaded_data_len,
'tmpfilename': tmpfilename,
'filename': filename,
'status': 'downloading',
'speed': speed,
})
elif self.params.get('verbose', False):
if not cursor_in_new_line:
self.to_screen(u'')
cursor_in_new_line = True
self.to_screen(u'[rtmpdump] '+line)
proc.wait()
if not cursor_in_new_line:
self.to_screen(u'')
return proc.returncode
self.report_destination(filename)
tmpfilename = self.temp_name(filename)
test = self.params.get('test', False)
# 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
# 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', '--verbose', '-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]
if test:
basic_args += ['--stop', '1']
if live:
basic_args += ['--live']
if conn:
basic_args += ['--conn', conn]
args = basic_args + [[], ['--resume', '--skip', '1']][self.params.get('continuedl', False)]
if sys.platform == 'win32' and sys.version_info < (3, 0):
# Windows subprocess module does not actually support Unicode
# on Python 2.x
# See http://stackoverflow.com/a/9951851/35070
subprocess_encoding = sys.getfilesystemencoding()
args = [a.encode(subprocess_encoding, 'ignore') for a in args]
else:
subprocess_encoding = None
if self.params.get('verbose', False):
if subprocess_encoding:
str_args = [
a.decode(subprocess_encoding) if isinstance(a, bytes) else a
for a in args]
else:
str_args = args
try:
import pipes
shell_quote = lambda args: ' '.join(map(pipes.quote, str_args))
except ImportError:
shell_quote = repr
self.to_screen(u'[debug] rtmpdump command line: ' + shell_quote(str_args))
retval = run_rtmpdump(args)
while (retval == 2 or retval == 1) and not test:
prevsize = os.path.getsize(encodeFilename(tmpfilename))
self.to_screen(u'[rtmpdump] %s bytes' % prevsize)
time.sleep(5.0) # This seems to be needed
retval = run_rtmpdump(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'[rtmpdump] Could not download the whole video. This can happen for some advertisements.')
retval = 0
break
if retval == 0 or (test and retval == 2):
fsize = os.path.getsize(encodeFilename(tmpfilename))
self.to_screen(u'[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 = ['-y', '-i', url, '-f', 'mp4', '-c', 'copy',
'-bsf:a', 'aac_adtstoasc', tmpfilename]
for program in ['avconv', 'ffmpeg']:
try:
subprocess.call([program, '-version'], stdout=(open(os.path.devnull, 'w')), stderr=subprocess.STDOUT)
break
except (OSError, IOError):
pass
else:
self.report_error(u'm3u8 download detected but ffmpeg or avconv could not be found')
cmd = [program] + args
retval = subprocess.call(cmd)
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
# Legacy file for backwards compatibility, use youtube_dl.downloader instead!
from .downloader import FileDownloader as RealFileDownloader
from .downloader import get_suitable_downloader
# This class reproduces the old behaviour of FileDownloader
class FileDownloader(RealFileDownloader):
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',
'total_bytes': os.path.getsize(encodeFilename(filename)),
})
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),
info_dict.get('rtmp_live', False),
info_dict.get('rtmp_conn', 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 = 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 = self.calc_speed(start, time.time(), byte_counter - resume_len)
if data_len is None:
eta = percent = None
else:
percent = self.calc_percent(byte_counter, data_len)
eta = self.calc_eta(start, time.time(), data_len - resume_len, byte_counter - resume_len)
self.report_progress(percent, data_len_str, speed, eta)
self._hook_progress({
'downloaded_bytes': byte_counter,
'total_bytes': data_len,
'tmpfilename': tmpfilename,
'filename': filename,
'status': 'downloading',
'eta': eta,
'speed': speed,
})
# 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):
real_fd = get_suitable_downloader(info_dict)(self.ydl, self.params)
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
* eta: The estimated time in seconds, None if unknown
* speed: The download speed in bytes/second, None if unknown
Hooks are guaranteed to be called at least once (with status "finished")
if the download is successful.
"""
self._progress_hooks.append(ph)
real_fd.add_progress_hook(ph)
return real_fd.download(filename, info_dict)

6
youtube_dl/YoutubeDL.py
View File

@ -51,7 +51,7 @@
YoutubeDLHandler,
)
from .extractor import get_info_extractor, gen_extractors
from .FileDownloader import FileDownloader
from .downloader import get_suitable_downloader
from .version import __version__
@ -847,10 +847,10 @@ def process_info(self, info_dict):
success = True
else:
try:
fd = FileDownloader(self, self.params)
fd = get_suitable_downloader(info_dict)(self, self.params)
for ph in self._fd_progress_hooks:
fd.add_progress_hook(ph)
success = fd._do_download(filename, info_dict)
success = fd.download(filename, info_dict)
except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
self.report_error(u'unable to download video data: %s' % str(err))
return

23
youtube_dl/downloader/__init__.py Normal file
View File

@ -0,0 +1,23 @@
from .common import FileDownloader
from .hls import HlsFD
from .http import HttpFD
from .mplayer import MplayerFD
from .rtmp import RtmpFD
from ..utils import (
determine_ext,
)
def get_suitable_downloader(info_dict):
"""Get the downloader class that can handle the info dict."""
url = info_dict['url']
if url.startswith('rtmp'):
return RtmpFD
if determine_ext(url) == u'm3u8':
return HlsFD
if url.startswith('mms') or url.startswith('rtsp'):
return MplayerFD
else:
return HttpFD

321
youtube_dl/downloader/common.py Normal file
View File

@ -0,0 +1,321 @@
import math
import os
import re
import subprocess
import sys
import time
from ..utils import (
encodeFilename,
timeconvert,
format_bytes,
)
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
Subclasses of this one must re-define the real_download method.
"""
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_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 None
return float(byte_counter) / float(data_len) * 100.0
@staticmethod
def format_percent(percent):
if percent is None:
return '---.-%'
return '%6s' % ('%3.1f%%' % percent)
@staticmethod
def calc_eta(start, now, total, current):
if total is None:
return None
dif = now - start
if current == 0 or dif < 0.001: # One millisecond
return None
rate = float(current) / dif
return int((float(total) - float(current)) / rate)
@staticmethod
def format_eta(eta):
if eta is None:
return '--:--'
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 None
return float(bytes) / dif
@staticmethod
def format_speed(speed):
if speed is None:
return '%10s' % '---b/s'
return '%10s' % ('%s/s' % format_bytes(speed))
@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_console_title(self, message):
self.ydl.to_console_title(message)
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_status(self, msg, is_last_line=False):
fullmsg = u'[download] ' + msg
if self.params.get('progress_with_newline', False):
self.to_screen(fullmsg)
else:
if os.name == 'nt':
prev_len = getattr(self, '_report_progress_prev_line_length',
0)
if prev_len > len(fullmsg):
fullmsg += u' ' * (prev_len - len(fullmsg))
self._report_progress_prev_line_length = len(fullmsg)
clear_line = u'\r'
else:
clear_line = (u'\r\x1b[K' if sys.stderr.isatty() else u'\r')
self.to_screen(clear_line + fullmsg, skip_eol=not is_last_line)
self.to_console_title(u'youtube-dl ' + msg)
def report_progress(self, percent, data_len_str, speed, eta):
"""Report download progress."""
if self.params.get('noprogress', False):
return
if eta is not None:
eta_str = self.format_eta(eta)
else:
eta_str = 'Unknown ETA'
if percent is not None:
percent_str = self.format_percent(percent)
else:
percent_str = 'Unknown %'
speed_str = self.format_speed(speed)
msg = (u'%s of %s at %s ETA %s' %
(percent_str, data_len_str, speed_str, eta_str))
self._report_progress_status(msg)
def report_progress_live_stream(self, downloaded_data_len, speed, elapsed):
if self.params.get('noprogress', False):
return
downloaded_str = format_bytes(downloaded_data_len)
speed_str = self.format_speed(speed)
elapsed_str = FileDownloader.format_seconds(elapsed)
msg = u'%s at %s (%s)' % (downloaded_str, speed_str, elapsed_str)
self._report_progress_status(msg)
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:
self._report_progress_status(
(u'100%% of %s in %s' %
(data_len_str, self.format_seconds(tot_time))),
is_last_line=True)
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:
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 download(self, filename, info_dict):
"""Download to a filename using the info from info_dict
Return True on success and False otherwise
"""
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',
'total_bytes': os.path.getsize(encodeFilename(filename)),
})
return True
else:
return self.real_download(filename, info_dict)
def real_download(self, filename, info_dict):
"""Real download process. Redefine in subclasses."""
raise NotImplementedError(u'This method must be implemented by sublcasses')
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
* eta: The estimated time in seconds, None if unknown
* speed: The download speed in bytes/second, None if unknown
Hooks are guaranteed to be called at least once (with status "finished")
if the download is successful.
"""
self._progress_hooks.append(ph)

44
youtube_dl/downloader/hls.py Normal file
View File

@ -0,0 +1,44 @@
import os
import subprocess
from .common import FileDownloader
from ..utils import (
encodeFilename,
)
class HlsFD(FileDownloader):
def real_download(self, filename, info_dict):
url = info_dict['url']
self.report_destination(filename)
tmpfilename = self.temp_name(filename)
args = ['-y', '-i', url, '-f', 'mp4', '-c', 'copy',
'-bsf:a', 'aac_adtstoasc', tmpfilename]
for program in ['avconv', 'ffmpeg']:
try:
subprocess.call([program, '-version'], stdout=(open(os.path.devnull, 'w')), stderr=subprocess.STDOUT)
break
except (OSError, IOError):
pass
else:
self.report_error(u'm3u8 download detected but ffmpeg or avconv could not be found')
cmd = [program] + args
retval = subprocess.call(cmd)
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

191
youtube_dl/downloader/http.py Normal file
View File

@ -0,0 +1,191 @@
import os
import re
import subprocess
import sys
import time
from .common import FileDownloader
from ..utils import (
compat_urllib_request,
compat_urllib_error,
ContentTooShortError,
encodeFilename,
sanitize_open,
format_bytes,
)
class HttpFD(FileDownloader):
def real_download(self, filename, info_dict):
url = info_dict['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 = 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):
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 = self.calc_speed(start, time.time(), byte_counter - resume_len)
if data_len is None:
eta = percent = None
else:
percent = self.calc_percent(byte_counter, data_len)
eta = self.calc_eta(start, time.time(), data_len - resume_len, byte_counter - resume_len)
self.report_progress(percent, data_len_str, speed, eta)
self._hook_progress({
'downloaded_bytes': byte_counter,
'total_bytes': data_len,
'tmpfilename': tmpfilename,
'filename': filename,
'status': 'downloading',
'eta': eta,
'speed': speed,
})
# 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

39
youtube_dl/downloader/mplayer.py Normal file
View File

@ -0,0 +1,39 @@
import os
import subprocess
from .common import FileDownloader
from ..utils import (
encodeFilename,
)
class MplayerFD(FileDownloader):
def real_download(self, filename, info_dict):
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

178
youtube_dl/downloader/rtmp.py Normal file
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@ -0,0 +1,178 @@
import os
import re
import subprocess
import sys
import time
from .common import FileDownloader
from ..utils import (
encodeFilename,
format_bytes,
)
class RtmpFD(FileDownloader):
def real_download(self, filename, info_dict):
def run_rtmpdump(args):
start = time.time()
resume_percent = None
resume_downloaded_data_len = None
proc = subprocess.Popen(args, stderr=subprocess.PIPE)
cursor_in_new_line = True
proc_stderr_closed = False
while not proc_stderr_closed:
# read line from stderr
line = u''
while True:
char = proc.stderr.read(1)
if not char:
proc_stderr_closed = True
break
if char in [b'\r', b'\n']:
break
line += char.decode('ascii', 'replace')
if not line:
# proc_stderr_closed is True
continue
mobj = re.search(r'([0-9]+\.[0-9]{3}) kB / [0-9]+\.[0-9]{2} sec \(([0-9]{1,2}\.[0-9])%\)', line)
if mobj:
downloaded_data_len = int(float(mobj.group(1))*1024)
percent = float(mobj.group(2))
if not resume_percent:
resume_percent = percent
resume_downloaded_data_len = downloaded_data_len
eta = self.calc_eta(start, time.time(), 100-resume_percent, percent-resume_percent)
speed = self.calc_speed(start, time.time(), downloaded_data_len-resume_downloaded_data_len)
data_len = None
if percent > 0:
data_len = int(downloaded_data_len * 100 / percent)
data_len_str = u'~' + format_bytes(data_len)
self.report_progress(percent, data_len_str, speed, eta)
cursor_in_new_line = False
self._hook_progress({
'downloaded_bytes': downloaded_data_len,
'total_bytes': data_len,
'tmpfilename': tmpfilename,
'filename': filename,
'status': 'downloading',
'eta': eta,
'speed': speed,
})
else:
# no percent for live streams
mobj = re.search(r'([0-9]+\.[0-9]{3}) kB / [0-9]+\.[0-9]{2} sec', line)
if mobj:
downloaded_data_len = int(float(mobj.group(1))*1024)
time_now = time.time()
speed = self.calc_speed(start, time_now, downloaded_data_len)
self.report_progress_live_stream(downloaded_data_len, speed, time_now - start)
cursor_in_new_line = False
self._hook_progress({
'downloaded_bytes': downloaded_data_len,
'tmpfilename': tmpfilename,
'filename': filename,
'status': 'downloading',
'speed': speed,
})
elif self.params.get('verbose', False):
if not cursor_in_new_line:
self.to_screen(u'')
cursor_in_new_line = True
self.to_screen(u'[rtmpdump] '+line)
proc.wait()
if not cursor_in_new_line:
self.to_screen(u'')
return proc.returncode
url = info_dict['url']
player_url = info_dict.get('player_url', None)
page_url = info_dict.get('page_url', None)
play_path = info_dict.get('play_path', None)
tc_url = info_dict.get('tc_url', None)
live = info_dict.get('rtmp_live', False)
conn = info_dict.get('rtmp_conn', None)
self.report_destination(filename)
tmpfilename = self.temp_name(filename)
test = self.params.get('test', False)
# 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
# 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', '--verbose', '-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]
if test:
basic_args += ['--stop', '1']
if live:
basic_args += ['--live']
if conn:
basic_args += ['--conn', conn]
args = basic_args + [[], ['--resume', '--skip', '1']][self.params.get('continuedl', False)]
if sys.platform == 'win32' and sys.version_info < (3, 0):
# Windows subprocess module does not actually support Unicode
# on Python 2.x
# See http://stackoverflow.com/a/9951851/35070
subprocess_encoding = sys.getfilesystemencoding()
args = [a.encode(subprocess_encoding, 'ignore') for a in args]
else:
subprocess_encoding = None
if self.params.get('verbose', False):
if subprocess_encoding:
str_args = [
a.decode(subprocess_encoding) if isinstance(a, bytes) else a
for a in args]
else:
str_args = args
try:
import pipes
shell_quote = lambda args: ' '.join(map(pipes.quote, str_args))
except ImportError:
shell_quote = repr
self.to_screen(u'[debug] rtmpdump command line: ' + shell_quote(str_args))
retval = run_rtmpdump(args)
while (retval == 2 or retval == 1) and not test:
prevsize = os.path.getsize(encodeFilename(tmpfilename))
self.to_screen(u'[rtmpdump] %s bytes' % prevsize)
time.sleep(5.0) # This seems to be needed
retval = run_rtmpdump(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'[rtmpdump] Could not download the whole video. This can happen for some advertisements.')
retval = 0
break
if retval == 0 or (test and retval == 2):
fsize = os.path.getsize(encodeFilename(tmpfilename))
self.to_screen(u'[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