mirror of
https://github.com/l1ving/youtube-dl
synced 2024-12-31 01:52:52 +08:00
688 lines
24 KiB
Python
688 lines
24 KiB
Python
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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import httplib
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import math
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import os
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import re
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import socket
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import subprocess
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import sys
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import time
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import urllib2
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if os.name == 'nt':
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import ctypes
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from Utils import *
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class FileDownloader(object):
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"""File Downloader class.
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File downloader objects are the ones responsible of downloading the
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actual video file and writing it to disk if the user has requested
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it, among some other tasks. In most cases there should be one per
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program. As, given a video URL, the downloader doesn't know how to
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extract all the needed information, task that InfoExtractors do, it
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has to pass the URL to one of them.
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For this, file downloader objects have a method that allows
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InfoExtractors to be registered in a given order. When it is passed
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a URL, the file downloader handles it to the first InfoExtractor it
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finds that reports being able to handle it. The InfoExtractor extracts
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all the information about the video or videos the URL refers to, and
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asks the FileDownloader to process the video information, possibly
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downloading the video.
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File downloaders accept a lot of parameters. In order not to saturate
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the object constructor with arguments, it receives a dictionary of
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options instead. These options are available through the params
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attribute for the InfoExtractors to use. The FileDownloader also
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registers itself as the downloader in charge for the InfoExtractors
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that are added to it, so this is a "mutual registration".
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Available options:
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username: Username for authentication purposes.
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password: Password for authentication purposes.
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usenetrc: Use netrc for authentication instead.
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quiet: Do not print messages to stdout.
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forceurl: Force printing final URL.
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forcetitle: Force printing title.
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forcethumbnail: Force printing thumbnail URL.
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forcedescription: Force printing description.
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forcefilename: Force printing final filename.
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simulate: Do not download the video files.
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format: Video format code.
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format_limit: Highest quality format to try.
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outtmpl: Template for output names.
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ignoreerrors: Do not stop on download errors.
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ratelimit: Download speed limit, in bytes/sec.
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nooverwrites: Prevent overwriting files.
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retries: Number of times to retry for HTTP error 5xx
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continuedl: Try to continue downloads if possible.
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noprogress: Do not print the progress bar.
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playliststart: Playlist item to start at.
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playlistend: Playlist item to end at.
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matchtitle: Download only matching titles.
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rejecttitle: Reject downloads for matching titles.
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logtostderr: Log messages to stderr instead of stdout.
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consoletitle: Display progress in console window's titlebar.
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nopart: Do not use temporary .part files.
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updatetime: Use the Last-modified header to set output file timestamps.
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writedescription: Write the video description to a .description file
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writeinfojson: Write the video description to a .info.json file
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writesubtitles: Write the video subtitles to a .srt file
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subtitleslang: Language of the subtitles to download
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"""
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params = None
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_ies = []
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_pps = []
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_download_retcode = None
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_num_downloads = None
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_screen_file = None
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def __init__(self, params):
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"""Create a FileDownloader object with the given options."""
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self._ies = []
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self._pps = []
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self._download_retcode = 0
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self._num_downloads = 0
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self._screen_file = [sys.stdout, sys.stderr][params.get('logtostderr', False)]
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self.params = params
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@staticmethod
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def format_bytes(bytes):
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if bytes is None:
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return 'N/A'
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if type(bytes) is str:
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bytes = float(bytes)
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if bytes == 0.0:
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exponent = 0
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else:
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exponent = long(math.log(bytes, 1024.0))
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suffix = 'bkMGTPEZY'[exponent]
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converted = float(bytes) / float(1024 ** exponent)
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return '%.2f%s' % (converted, suffix)
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@staticmethod
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def calc_percent(byte_counter, data_len):
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if data_len is None:
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return '---.-%'
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return '%6s' % ('%3.1f%%' % (float(byte_counter) / float(data_len) * 100.0))
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@staticmethod
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def calc_eta(start, now, total, current):
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if total is None:
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return '--:--'
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dif = now - start
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if current == 0 or dif < 0.001: # One millisecond
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return '--:--'
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rate = float(current) / dif
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eta = long((float(total) - float(current)) / rate)
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(eta_mins, eta_secs) = divmod(eta, 60)
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if eta_mins > 99:
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return '--:--'
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return '%02d:%02d' % (eta_mins, eta_secs)
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@staticmethod
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def calc_speed(start, now, bytes):
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dif = now - start
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if bytes == 0 or dif < 0.001: # One millisecond
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return '%10s' % '---b/s'
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return '%10s' % ('%s/s' % FileDownloader.format_bytes(float(bytes) / dif))
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@staticmethod
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def best_block_size(elapsed_time, bytes):
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new_min = max(bytes / 2.0, 1.0)
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new_max = min(max(bytes * 2.0, 1.0), 4194304) # Do not surpass 4 MB
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if elapsed_time < 0.001:
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return long(new_max)
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rate = bytes / elapsed_time
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if rate > new_max:
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return long(new_max)
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if rate < new_min:
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return long(new_min)
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return long(rate)
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@staticmethod
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def parse_bytes(bytestr):
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"""Parse a string indicating a byte quantity into a long integer."""
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matchobj = re.match(r'(?i)^(\d+(?:\.\d+)?)([kMGTPEZY]?)$', bytestr)
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if matchobj is None:
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return None
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number = float(matchobj.group(1))
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multiplier = 1024.0 ** 'bkmgtpezy'.index(matchobj.group(2).lower())
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return long(round(number * multiplier))
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def add_info_extractor(self, ie):
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"""Add an InfoExtractor object to the end of the list."""
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self._ies.append(ie)
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ie.set_downloader(self)
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def add_post_processor(self, pp):
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"""Add a PostProcessor object to the end of the chain."""
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self._pps.append(pp)
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pp.set_downloader(self)
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def to_screen(self, message, skip_eol=False):
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"""Print message to stdout if not in quiet mode."""
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assert type(message) == type(u'')
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if not self.params.get('quiet', False):
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terminator = [u'\n', u''][skip_eol]
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output = message + terminator
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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
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output = output.encode(preferredencoding(), 'ignore')
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self._screen_file.write(output)
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self._screen_file.flush()
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def to_stderr(self, message):
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"""Print message to stderr."""
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print >>sys.stderr, message.encode(preferredencoding())
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def to_cons_title(self, message):
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"""Set console/terminal window title to message."""
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if not self.params.get('consoletitle', False):
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return
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if os.name == 'nt' and ctypes.windll.kernel32.GetConsoleWindow():
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# c_wchar_p() might not be necessary if `message` is
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# already of type unicode()
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ctypes.windll.kernel32.SetConsoleTitleW(ctypes.c_wchar_p(message))
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elif 'TERM' in os.environ:
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sys.stderr.write('\033]0;%s\007' % message.encode(preferredencoding()))
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def fixed_template(self):
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"""Checks if the output template is fixed."""
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return (re.search(ur'(?u)%\(.+?\)s', self.params['outtmpl']) is None)
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def trouble(self, message=None):
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"""Determine action to take when a download problem appears.
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Depending on if the downloader has been configured to ignore
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download errors or not, this method may throw an exception or
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not when errors are found, after printing the message.
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"""
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if message is not None:
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self.to_stderr(message)
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if not self.params.get('ignoreerrors', False):
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raise DownloadError(message)
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self._download_retcode = 1
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def slow_down(self, start_time, byte_counter):
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"""Sleep if the download speed is over the rate limit."""
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rate_limit = self.params.get('ratelimit', None)
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if rate_limit is None or byte_counter == 0:
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return
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now = time.time()
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elapsed = now - start_time
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if elapsed <= 0.0:
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return
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speed = float(byte_counter) / elapsed
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if speed > rate_limit:
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time.sleep((byte_counter - rate_limit * (now - start_time)) / rate_limit)
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def temp_name(self, filename):
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"""Returns a temporary filename for the given filename."""
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if self.params.get('nopart', False) or filename == u'-' or \
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(os.path.exists(encodeFilename(filename)) and not os.path.isfile(encodeFilename(filename))):
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return filename
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return filename + u'.part'
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def undo_temp_name(self, filename):
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if filename.endswith(u'.part'):
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return filename[:-len(u'.part')]
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return filename
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def try_rename(self, old_filename, new_filename):
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try:
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if old_filename == new_filename:
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return
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os.rename(encodeFilename(old_filename), encodeFilename(new_filename))
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except (IOError, OSError), err:
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self.trouble(u'ERROR: unable to rename file')
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def try_utime(self, filename, last_modified_hdr):
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"""Try to set the last-modified time of the given file."""
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if last_modified_hdr is None:
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return
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if not os.path.isfile(encodeFilename(filename)):
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return
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timestr = last_modified_hdr
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if timestr is None:
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return
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filetime = timeconvert(timestr)
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if filetime is None:
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return filetime
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try:
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os.utime(filename, (time.time(), filetime))
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except:
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pass
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return filetime
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def report_writedescription(self, descfn):
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""" Report that the description file is being written """
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self.to_screen(u'[info] Writing video description to: ' + descfn)
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def report_writesubtitles(self, srtfn):
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""" Report that the subtitles file is being written """
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self.to_screen(u'[info] Writing video subtitles to: ' + srtfn)
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def report_writeinfojson(self, infofn):
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""" Report that the metadata file has been written """
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self.to_screen(u'[info] Video description metadata as JSON to: ' + infofn)
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def report_destination(self, filename):
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"""Report destination filename."""
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self.to_screen(u'[download] Destination: ' + filename)
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def report_progress(self, percent_str, data_len_str, speed_str, eta_str):
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"""Report download progress."""
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if self.params.get('noprogress', False):
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return
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self.to_screen(u'\r[download] %s of %s at %s ETA %s' %
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(percent_str, data_len_str, speed_str, eta_str), skip_eol=True)
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self.to_cons_title(u'youtube-dl - %s of %s at %s ETA %s' %
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(percent_str.strip(), data_len_str.strip(), speed_str.strip(), eta_str.strip()))
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def report_resuming_byte(self, resume_len):
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"""Report attempt to resume at given byte."""
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self.to_screen(u'[download] Resuming download at byte %s' % resume_len)
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def report_retry(self, count, retries):
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"""Report retry in case of HTTP error 5xx"""
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self.to_screen(u'[download] Got server HTTP error. Retrying (attempt %d of %d)...' % (count, retries))
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def report_file_already_downloaded(self, file_name):
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"""Report file has already been fully downloaded."""
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try:
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self.to_screen(u'[download] %s has already been downloaded' % file_name)
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except (UnicodeEncodeError), err:
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self.to_screen(u'[download] The file has already been downloaded')
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def report_unable_to_resume(self):
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"""Report it was impossible to resume download."""
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self.to_screen(u'[download] Unable to resume')
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def report_finish(self):
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"""Report download finished."""
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if self.params.get('noprogress', False):
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self.to_screen(u'[download] Download completed')
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else:
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self.to_screen(u'')
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def increment_downloads(self):
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"""Increment the ordinal that assigns a number to each file."""
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self._num_downloads += 1
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def prepare_filename(self, info_dict):
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"""Generate the output filename."""
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try:
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template_dict = dict(info_dict)
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template_dict['epoch'] = unicode(long(time.time()))
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template_dict['autonumber'] = unicode('%05d' % self._num_downloads)
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filename = self.params['outtmpl'] % template_dict
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return filename
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except (ValueError, KeyError), err:
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self.trouble(u'ERROR: invalid system charset or erroneous output template')
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return None
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def _match_entry(self, info_dict):
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""" Returns None iff the file should be downloaded """
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title = info_dict['title']
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matchtitle = self.params.get('matchtitle', False)
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if matchtitle and not re.search(matchtitle, title, re.IGNORECASE):
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return u'[download] "' + title + '" title did not match pattern "' + matchtitle + '"'
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rejecttitle = self.params.get('rejecttitle', False)
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if rejecttitle and re.search(rejecttitle, title, re.IGNORECASE):
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return u'"' + title + '" title matched reject pattern "' + rejecttitle + '"'
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return None
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def process_info(self, info_dict):
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"""Process a single dictionary returned by an InfoExtractor."""
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reason = self._match_entry(info_dict)
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if reason is not None:
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self.to_screen(u'[download] ' + reason)
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return
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max_downloads = self.params.get('max_downloads')
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if max_downloads is not None:
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if self._num_downloads > int(max_downloads):
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raise MaxDownloadsReached()
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filename = self.prepare_filename(info_dict)
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# Forced printings
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if self.params.get('forcetitle', False):
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print info_dict['title'].encode(preferredencoding(), 'xmlcharrefreplace')
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if self.params.get('forceurl', False):
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print info_dict['url'].encode(preferredencoding(), 'xmlcharrefreplace')
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if self.params.get('forcethumbnail', False) and 'thumbnail' in info_dict:
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print info_dict['thumbnail'].encode(preferredencoding(), 'xmlcharrefreplace')
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if self.params.get('forcedescription', False) and 'description' in info_dict:
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print info_dict['description'].encode(preferredencoding(), 'xmlcharrefreplace')
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if self.params.get('forcefilename', False) and filename is not None:
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print filename.encode(preferredencoding(), 'xmlcharrefreplace')
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if self.params.get('forceformat', False):
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print info_dict['format'].encode(preferredencoding(), 'xmlcharrefreplace')
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# Do nothing else if in simulate mode
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if self.params.get('simulate', False):
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return
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if filename is None:
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return
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try:
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dn = os.path.dirname(encodeFilename(filename))
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if dn != '' and not os.path.exists(dn): # dn is already encoded
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os.makedirs(dn)
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except (OSError, IOError), err:
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self.trouble(u'ERROR: unable to create directory ' + unicode(err))
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return
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if self.params.get('writedescription', False):
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try:
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descfn = filename + u'.description'
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self.report_writedescription(descfn)
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descfile = open(encodeFilename(descfn), 'wb')
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try:
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descfile.write(info_dict['description'].encode('utf-8'))
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finally:
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descfile.close()
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except (OSError, IOError):
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self.trouble(u'ERROR: Cannot write description file ' + descfn)
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return
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if self.params.get('writesubtitles', False) and 'subtitles' in info_dict and info_dict['subtitles']:
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# subtitles download errors are already managed as troubles in relevant IE
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# that way it will silently go on when used with unsupporting IE
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try:
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srtfn = filename.rsplit('.', 1)[0] + u'.srt'
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self.report_writesubtitles(srtfn)
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srtfile = open(encodeFilename(srtfn), 'wb')
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try:
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srtfile.write(info_dict['subtitles'].encode('utf-8'))
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finally:
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srtfile.close()
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except (OSError, IOError):
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self.trouble(u'ERROR: Cannot write subtitles file ' + descfn)
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return
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if self.params.get('writeinfojson', False):
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infofn = filename + u'.info.json'
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self.report_writeinfojson(infofn)
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try:
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json.dump
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except (NameError,AttributeError):
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self.trouble(u'ERROR: No JSON encoder found. Update to Python 2.6+, setup a json module, or leave out --write-info-json.')
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return
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try:
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infof = open(encodeFilename(infofn), 'wb')
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try:
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json_info_dict = dict((k,v) for k,v in info_dict.iteritems() if not k in ('urlhandle',))
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json.dump(json_info_dict, infof)
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finally:
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infof.close()
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except (OSError, IOError):
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self.trouble(u'ERROR: Cannot write metadata to JSON file ' + infofn)
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return
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if not self.params.get('skip_download', False):
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if self.params.get('nooverwrites', False) and os.path.exists(encodeFilename(filename)):
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success = True
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else:
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try:
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success = self._do_download(filename, info_dict)
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except (OSError, IOError), err:
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raise UnavailableVideoError
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except (urllib2.URLError, httplib.HTTPException, socket.error), err:
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self.trouble(u'ERROR: unable to download video data: %s' % str(err))
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return
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except (ContentTooShortError, ), err:
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self.trouble(u'ERROR: content too short (expected %s bytes and served %s)' % (err.expected, err.downloaded))
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return
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if success:
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try:
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self.post_process(filename, info_dict)
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except (PostProcessingError), err:
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self.trouble(u'ERROR: postprocessing: %s' % str(err))
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return
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def download(self, url_list):
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"""Download a given list of URLs."""
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if len(url_list) > 1 and self.fixed_template():
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raise SameFileError(self.params['outtmpl'])
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for url in url_list:
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suitable_found = False
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for ie in self._ies:
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# Go to next InfoExtractor if not suitable
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if not ie.suitable(url):
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continue
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# Suitable InfoExtractor found
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suitable_found = True
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# Extract information from URL and process it
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videos = ie.extract(url)
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for video in videos or []:
|
|
try:
|
|
self.increment_downloads()
|
|
self.process_info(video)
|
|
except UnavailableVideoError:
|
|
self.trouble(u'\nERROR: unable to download video')
|
|
|
|
# Suitable InfoExtractor had been found; go to next URL
|
|
break
|
|
|
|
if not suitable_found:
|
|
self.trouble(u'ERROR: no suitable InfoExtractor: %s' % url)
|
|
|
|
return self._download_retcode
|
|
|
|
def post_process(self, filename, ie_info):
|
|
"""Run the postprocessing chain on the given file."""
|
|
info = dict(ie_info)
|
|
info['filepath'] = filename
|
|
for pp in self._pps:
|
|
info = pp.run(info)
|
|
if info is None:
|
|
break
|
|
|
|
def _download_with_rtmpdump(self, filename, url, player_url):
|
|
self.report_destination(filename)
|
|
tmpfilename = self.temp_name(filename)
|
|
|
|
# Check for rtmpdump first
|
|
try:
|
|
subprocess.call(['rtmpdump', '-h'], stdout=(file(os.path.devnull, 'w')), stderr=subprocess.STDOUT)
|
|
except (OSError, IOError):
|
|
self.trouble(u'ERROR: 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', '-q'] + [[], ['-W', player_url]][player_url is not None] + ['-r', url, '-o', tmpfilename]
|
|
args = basic_args + [[], ['-e', '-k', '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:
|
|
self.to_screen(u'\r[rtmpdump] %s bytes' % os.path.getsize(encodeFilename(tmpfilename)))
|
|
self.try_rename(tmpfilename, filename)
|
|
return True
|
|
else:
|
|
self.trouble(u'\nERROR: rtmpdump exited with code %d' % retval)
|
|
return False
|
|
|
|
def _do_download(self, filename, info_dict):
|
|
url = info_dict['url']
|
|
player_url = info_dict.get('player_url', None)
|
|
|
|
# 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)
|
|
return True
|
|
|
|
# Attempt to download using rtmpdump
|
|
if url.startswith('rtmp'):
|
|
return self._download_with_rtmpdump(filename, url, player_url)
|
|
|
|
tmpfilename = self.temp_name(filename)
|
|
stream = None
|
|
|
|
# Do not include the Accept-Encoding header
|
|
headers = {'Youtubedl-no-compression': 'True'}
|
|
basic_request = urllib2.Request(url, None, headers)
|
|
request = urllib2.Request(url, None, headers)
|
|
|
|
# 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 = urllib2.urlopen(request)
|
|
break
|
|
except (urllib2.HTTPError, ), 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 = urllib2.urlopen(basic_request)
|
|
content_length = data.info()['Content-Length']
|
|
except (urllib2.HTTPError, ), 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 < long(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)
|
|
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.trouble(u'ERROR: giving up after %s retries' % retries)
|
|
return False
|
|
|
|
data_len = data.info().get('Content-length', None)
|
|
if data_len is not None:
|
|
data_len = long(data_len) + resume_len
|
|
data_len_str = self.format_bytes(data_len)
|
|
byte_counter = 0 + resume_len
|
|
block_size = 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), err:
|
|
self.trouble(u'ERROR: unable to open for writing: %s' % str(err))
|
|
return False
|
|
try:
|
|
stream.write(data_block)
|
|
except (IOError, OSError), err:
|
|
self.trouble(u'\nERROR: unable to write data: %s' % str(err))
|
|
return 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)
|
|
|
|
# Apply rate limit
|
|
self.slow_down(start, byte_counter - resume_len)
|
|
|
|
if stream is None:
|
|
self.trouble(u'\nERROR: Did not get any data blocks')
|
|
return False
|
|
stream.close()
|
|
self.report_finish()
|
|
if data_len is not None and byte_counter != data_len:
|
|
raise ContentTooShortError(byte_counter, long(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))
|
|
|
|
return True
|