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from __future__ import division, unicode_literals

import os
import re
import sys
import time
import random

from ..compat import compat_os_name
from ..utils import (
    decodeArgument,
    encodeFilename,
    error_to_compat_str,
    format_bytes,
    shell_quote,
    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
    xattr_set_filesize: Set ytdl.filesize user xattribute with expected size.
    external_downloader_args:  A list of additional command-line arguments for the
                        external downloader.
    hls_use_mpegts:     Use the mpegts container for HLS videos.
    http_chunk_size:    Size of a chunk for chunk-based HTTP downloading. May be
                        useful for bypassing bandwidth throttling imposed by
                        a webserver (experimental)

    Subclasses of this one must re-define the real_download method.
    """

    _TEST_FILE_SIZE = 10241
    params = None

    def __init__(self, ydl, params):
        """Create a FileDownloader object with the given options."""
        self.ydl = ydl
        self._progress_hooks = []
        self.params = params
        self.add_progress_hook(self.report_progress)

    @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
        if now is None:
            now = time.time()
        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 format_retries(retries):
        return 'inf' if retries == float('inf') else '%.0f' % retries

    @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, now, byte_counter):
        """Sleep if the download speed is over the rate limit."""
        rate_limit = self.params.get('ratelimit')
        if rate_limit is None or byte_counter == 0:
            return
        if now is None:
            now = time.time()
        elapsed = now - start_time
        if elapsed <= 0.0:
            return
        speed = float(byte_counter) / elapsed
        if speed > rate_limit:
            sleep_time = float(byte_counter) / rate_limit - elapsed
            if sleep_time > 0:
                time.sleep(sleep_time)

    def temp_name(self, filename):
        """Returns a temporary filename for the given filename."""
        if self.params.get('nopart', False) or filename == '-' or \
                (os.path.exists(encodeFilename(filename)) and not os.path.isfile(encodeFilename(filename))):
            return filename
        return filename + '.part'

    def undo_temp_name(self, filename):
        if filename.endswith('.part'):
            return filename[:-len('.part')]
        return filename

    def ytdl_filename(self, filename):
        return filename + '.ytdl'

    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('unable to rename file: %s' % error_to_compat_str(err))

    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 Exception:
            pass
        return filetime

    def report_destination(self, filename):
        """Report destination filename."""
        self.to_screen('[download] Destination: ' + filename)

    def _report_progress_status(self, msg, is_last_line=False):
        fullmsg = '[download] ' + msg
        if self.params.get('progress_with_newline', False):
            self.to_screen(fullmsg)
        else:
            if compat_os_name == 'nt':
                prev_len = getattr(self, '_report_progress_prev_line_length',
                                   0)
                if prev_len > len(fullmsg):
                    fullmsg += ' ' * (prev_len - len(fullmsg))
                self._report_progress_prev_line_length = len(fullmsg)
                clear_line = '\r'
            else:
                clear_line = ('\r\x1b[K' if sys.stderr.isatty() else '\r')
            self.to_screen(clear_line + fullmsg, skip_eol=not is_last_line)
        self.to_console_title('youtube-dl ' + msg)

    def report_progress(self, s):
        if s['status'] == 'finished':
            if self.params.get('noprogress', False):
                self.to_screen('[download] Download completed')
            else:
                msg_template = '100%%'
                if s.get('total_bytes') is not None:
                    s['_total_bytes_str'] = format_bytes(s['total_bytes'])
                    msg_template += ' of %(_total_bytes_str)s'
                if s.get('elapsed') is not None:
                    s['_elapsed_str'] = self.format_seconds(s['elapsed'])
                    msg_template += ' in %(_elapsed_str)s'
                self._report_progress_status(
                    msg_template % s, is_last_line=True)

        if self.params.get('noprogress'):
            return

        if s['status'] != 'downloading':
            return

        if s.get('eta') is not None:
            s['_eta_str'] = self.format_eta(s['eta'])
        else:
            s['_eta_str'] = 'Unknown ETA'

        if s.get('total_bytes') and s.get('downloaded_bytes') is not None:
            s['_percent_str'] = self.format_percent(100 * s['downloaded_bytes'] / s['total_bytes'])
        elif s.get('total_bytes_estimate') and s.get('downloaded_bytes') is not None:
            s['_percent_str'] = self.format_percent(100 * s['downloaded_bytes'] / s['total_bytes_estimate'])
        else:
            if s.get('downloaded_bytes') == 0:
                s['_percent_str'] = self.format_percent(0)
            else:
                s['_percent_str'] = 'Unknown %'

        if s.get('speed') is not None:
            s['_speed_str'] = self.format_speed(s['speed'])
        else:
            s['_speed_str'] = 'Unknown speed'

        if s.get('total_bytes') is not None:
            s['_total_bytes_str'] = format_bytes(s['total_bytes'])
            msg_template = '%(_percent_str)s of %(_total_bytes_str)s at %(_speed_str)s ETA %(_eta_str)s'
        elif s.get('total_bytes_estimate') is not None:
            s['_total_bytes_estimate_str'] = format_bytes(s['total_bytes_estimate'])
            msg_template = '%(_percent_str)s of ~%(_total_bytes_estimate_str)s at %(_speed_str)s ETA %(_eta_str)s'
        else:
            if s.get('downloaded_bytes') is not None:
                s['_downloaded_bytes_str'] = format_bytes(s['downloaded_bytes'])
                if s.get('elapsed'):
                    s['_elapsed_str'] = self.format_seconds(s['elapsed'])
                    msg_template = '%(_downloaded_bytes_str)s at %(_speed_str)s (%(_elapsed_str)s)'
                else:
                    msg_template = '%(_downloaded_bytes_str)s at %(_speed_str)s'
            else:
                msg_template = '%(_percent_str)s % at %(_speed_str)s ETA %(_eta_str)s'

        self._report_progress_status(msg_template % s)

    def report_resuming_byte(self, resume_len):
        """Report attempt to resume at given byte."""
        self.to_screen('[download] Resuming download at byte %s' % resume_len)

    def report_retry(self, err, count, retries):
        """Report retry in case of HTTP error 5xx"""
        self.to_screen(
            '[download] Got server HTTP error: %s. Retrying (attempt %d of %s)...'
            % (error_to_compat_str(err), count, self.format_retries(retries)))

    def report_file_already_downloaded(self, file_name):
        """Report file has already been fully downloaded."""
        try:
            self.to_screen('[download] %s has already been downloaded' % file_name)
        except UnicodeEncodeError:
            self.to_screen('[download] The file has already been downloaded')

    def report_unable_to_resume(self):
        """Report it was impossible to resume download."""
        self.to_screen('[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
        """

        nooverwrites_and_exists = (
            self.params.get('nooverwrites', False)
            and os.path.exists(encodeFilename(filename))
        )

        if not hasattr(filename, 'write'):
            continuedl_and_exists = (
                self.params.get('continuedl', True)
                and os.path.isfile(encodeFilename(filename))
                and not self.params.get('nopart', False)
            )

            # Check file already present
            if filename != '-' and (nooverwrites_and_exists or continuedl_and_exists):
                self.report_file_already_downloaded(filename)
                self._hook_progress({
                    'filename': filename,
                    'status': 'finished',
                    'total_bytes': os.path.getsize(encodeFilename(filename)),
                })
                return True

        min_sleep_interval = self.params.get('sleep_interval')
        if min_sleep_interval:
            max_sleep_interval = self.params.get('max_sleep_interval', min_sleep_interval)
            sleep_interval = random.uniform(min_sleep_interval, max_sleep_interval)
            self.to_screen(
                '[download] Sleeping %s seconds...' % (
                    int(sleep_interval) if sleep_interval.is_integer()
                    else '%.2f' % sleep_interval))
            time.sleep(sleep_interval)

        return self.real_download(filename, info_dict)

    def real_download(self, filename, info_dict):
        """Real download process. Redefine in subclasses."""
        raise NotImplementedError('This method must be implemented by subclasses')

    def _hook_progress(self, status):
        for ph in self._progress_hooks:
            ph(status)

    def add_progress_hook(self, ph):
        # See YoutubeDl.py (search for progress_hooks) for a description of
        # this interface
        self._progress_hooks.append(ph)

    def _debug_cmd(self, args, exe=None):
        if not self.params.get('verbose', False):
            return

        str_args = [decodeArgument(a) for a in args]

        if exe is None:
            exe = os.path.basename(str_args[0])

        self.to_screen('[debug] %s command line: %s' % (
            exe, shell_quote(str_args)))

Filemanager

Name Type Size Permission Actions
__pycache__ Folder 2755
__init__.py File 1.54 KB 0644
common.py File 14.43 KB 0644
dash.py File 3.13 KB 0644
external.py File 13.57 KB 0644
f4m.py File 15.07 KB 0644
fragment.py File 10.7 KB 0644
hls.py File 9.94 KB 0644
http.py File 15.78 KB 0644
ism.py File 10.32 KB 0644
rtmp.py File 8.68 KB 0644
rtsp.py File 1.52 KB 0644