def test_bandwidth_meter(self):
meter = BandwidthMeter()
self.assertEqual(0, meter.speed())
meter.feed(1000, feed_time=time.time() + 0.2)
self.assertTrue(meter.speed())
def test_bandwidth_meter(self):
meter = BandwidthMeter()
self.assertEqual(0, meter.speed())
time.sleep(0.2)
meter.feed(1000)
self.assertTrue(meter.speed())
class BarProgressRecorderSession(BaseProgressRecorderSession):
'''Bar Progress Recorder Session.
This session is responsible for displaying the ASCII bar
and stats.
'''
def __init__(self, update_interval=0.5, bar_width=25, **kwargs):
super().__init__(**kwargs)
self._last_flush_time = 0
self._update_interval = update_interval
self._bytes_continued = 0
self._total_size = None
self._bar_width = bar_width
self._throbber_index = 0
self._throbber_iter = itertools.cycle(
itertools.chain(
range(bar_width), reversed(range(1, bar_width - 1))
))
self._bandwidth_meter = BandwidthMeter()
self._start_time = time.time()
def pre_response(self, response):
super().pre_response(response)
if response.status_code == http.client.PARTIAL_CONTENT:
match = re.search(
r'bytes +([0-9]+)-([0-9]+)/([0-9]+)',
response.fields.get('Content-Range', '')
)
if match:
self._bytes_continued = int(match.group(1))
self._total_size = int(match.group(3))
else:
self._total_size = self._content_length
def response_data(self, data):
super().response_data(data)
if not self._response:
return
self._bandwidth_meter.feed(len(data))
time_now = time.time()
if time_now - self._last_flush_time > self._update_interval:
self._print_status()
self._stream.flush()
self._last_flush_time = time_now
def response(self, response):
self._print_status()
self._stream.flush()
super().response(response)
def _print_status(self):
self._clear_line()
if self._total_size:
self._print_percent()
self._print(' ')
self._print_bar()
else:
self._print_throbber()
self._print(' ')
self._print_size_downloaded()
self._print(' ')
self._print_duration()
self._print(' ')
self._print_speed()
self._flush()
def _clear_line(self):
self._print('\x1b[1G')
self._print('\x1b[2K')
def _print_throbber(self):
self._print('[')
for position in range(self._bar_width):
self._print('O' if position == self._throbber_index else ' ')
self._print(']')
self._throbber_index = next(self._throbber_iter)
def _print_bar(self):
self._print('[')
for position in range(self._bar_width):
position_fraction = position / (self._bar_width - 1)
position_bytes = position_fraction * self._total_size
if position_bytes < self._bytes_continued:
self._print('+')
elif (position_bytes <=
self._bytes_continued + self._bytes_received):
self._print('=')
else:
self._print(' ')
self._print(']')
def _print_size_downloaded(self):
self._print(wpull.string.format_size(self._bytes_received))
def _print_duration(self):
duration = int(time.time() - self._start_time)
self._print(datetime.timedelta(seconds=duration))
def _print_speed(self):
if self._bandwidth_meter.num_samples:
speed = self._bandwidth_meter.speed()
speed_str = _('{preformatted_file_size}/s').format(
preformatted_file_size=wpull.string.format_size(speed)
)
else:
speed_str = _('-- B/s')
self._print(speed_str)
def _print_percent(self):
fraction_done = ((self._bytes_continued + self._bytes_received) /
self._total_size)
self._print('{fraction_done:.1%}'.format(fraction_done=fraction_done))
class BarProgressRecorderSession(BaseProgressRecorderSession):
'''Bar Progress Recorder Session.
This session is responsible for displaying the ASCII bar
and stats.
'''
def __init__(self, update_interval=0.5, bar_width=25, **kwargs):
super().__init__(**kwargs)
self._last_flush_time = 0
self._update_interval = update_interval
self._bytes_continued = 0
self._total_size = None
self._bar_width = bar_width
self._throbber_index = 0
self._throbber_iter = itertools.cycle(
itertools.chain(range(bar_width), reversed(range(1,
bar_width - 1))))
self._bandwidth_meter = BandwidthMeter()
self._start_time = time.time()
def pre_response(self, response):
super().pre_response(response)
if response.protocol == 'http' and \
response.status_code == http.client.PARTIAL_CONTENT:
match = re.search(r'bytes +([0-9]+)-([0-9]+)/([0-9]+)',
response.fields.get('Content-Range', ''))
if match:
self._bytes_continued = int(match.group(1))
self._total_size = int(match.group(3))
elif response.protocol == 'ftp' and response.restart_value:
self._bytes_continued = response.restart_value
self._total_size = self._content_length
else:
self._total_size = self._content_length
def response_data(self, data):
super().response_data(data)
if not self._response:
return
self._bandwidth_meter.feed(len(data))
time_now = time.time()
if time_now - self._last_flush_time > self._update_interval:
self._print_status()
self._stream.flush()
self._last_flush_time = time_now
def response(self, response):
self._print_status()
self._stream.flush()
super().response(response)
def _print_status(self):
'''Print an entire status line including bar and stats.'''
self._clear_line()
self._print(' ')
if self._total_size:
self._print_percent()
self._print(' ')
self._print_bar()
else:
self._print_throbber()
self._print(' ')
self._print_size_downloaded()
self._print(' ')
self._print_duration()
self._print(' ')
self._print_speed()
self._flush()
def _clear_line(self):
'''Print ANSI code to clear the current line.'''
self._print('\x1b[1G')
self._print('\x1b[2K')
def _print_throbber(self):
'''Print an indefinite progress bar.'''
self._print('[')
for position in range(self._bar_width):
self._print('O' if position == self._throbber_index else ' ')
self._print(']')
self._throbber_index = next(self._throbber_iter)
def _print_bar(self):
'''Print a progress bar.'''
self._print('[')
for position in range(self._bar_width):
position_fraction = position / (self._bar_width - 1)
position_bytes = position_fraction * self._total_size
if position_bytes < self._bytes_continued:
self._print('+')
elif (position_bytes <=
self._bytes_continued + self._bytes_received):
self._print('=')
else:
self._print(' ')
self._print(']')
def _print_size_downloaded(self):
'''Print the bytes downloaded.'''
self._print(wpull.string.format_size(self._bytes_received))
def _print_duration(self):
'''Print the elapsed download time.'''
duration = int(time.time() - self._start_time)
self._print(datetime.timedelta(seconds=duration))
def _print_speed(self):
'''Print the current speed.'''
if self._bandwidth_meter.num_samples:
speed = self._bandwidth_meter.speed()
if self._human_format:
file_size_str = wpull.string.format_size(speed)
else:
file_size_str = '{:.1f} b'.format(speed * 8)
speed_str = _('{preformatted_file_size}/s').format(
preformatted_file_size=file_size_str)
else:
speed_str = _('-- B/s')
self._print(speed_str)
def _print_percent(self):
'''Print how much is done in percentage.'''
fraction_done = ((self._bytes_continued + self._bytes_received) /
self._total_size)
self._print('{fraction_done:.1%}'.format(fraction_done=fraction_done))
