Merge remote-tracking branch 'SyxbEaEQ2/rate-limit'

This commit is contained in:
Philipp Hagemeister 2014-12-12 17:16:13 +01:00
commit cf372f0778
2 changed files with 28 additions and 12 deletions

View file

@ -80,6 +80,8 @@ class FileDownloader(object):
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
@ -146,18 +148,19 @@ class FileDownloader(object):
def report_error(self, *args, **kargs):
self.ydl.report_error(*args, **kargs)
def slow_down(self, start_time, byte_counter):
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', None)
if rate_limit is None or byte_counter == 0:
return
now = time.time()
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:
time.sleep((byte_counter - rate_limit * (now - start_time)) / rate_limit)
time.sleep(max((byte_counter / rate_limit) - elapsed, 0))
def temp_name(self, filename):
"""Returns a temporary filename for the given filename."""

View file

@ -136,16 +136,21 @@ class HttpFD(FileDownloader):
byte_counter = 0 + resume_len
block_size = self.params.get('buffersize', 1024)
start = time.time()
# measure time over whole while-loop, so slow_down() and best_block_size() work together properly
now = None # needed for slow_down() in the first loop run
before = start # start measuring
while True:
# Download and write
before = time.time()
data_block = data.read(block_size if not is_test else min(block_size, data_len - byte_counter))
after = time.time()
if len(data_block) == 0:
break
byte_counter += len(data_block)
# Open file just in time
# exit loop when download is finished
if len(data_block) == 0:
break
# Open destination file just in time
if stream is None:
try:
(stream, tmpfilename) = sanitize_open(tmpfilename, open_mode)
@ -161,11 +166,22 @@ class HttpFD(FileDownloader):
self.to_stderr('\n')
self.report_error('unable to write data: %s' % str(err))
return False
# Apply rate limit
self.slow_down(start, now, byte_counter - resume_len)
# end measuring of one loop run
now = time.time()
after = now
# Adjust block size
if not self.params.get('noresizebuffer', False):
block_size = self.best_block_size(after - before, len(data_block))
before = after
# Progress message
speed = self.calc_speed(start, time.time(), byte_counter - resume_len)
speed = self.calc_speed(start, now, byte_counter - resume_len)
if data_len is None:
eta = percent = None
else:
@ -186,9 +202,6 @@ class HttpFD(FileDownloader):
if is_test and byte_counter == data_len:
break
# Apply rate limit
self.slow_down(start, byte_counter - resume_len)
if stream is None:
self.to_stderr('\n')
self.report_error('Did not get any data blocks')