mirror of
https://github.com/yt-dlp/yt-dlp.git
synced 2025-11-04 00:25:15 +00:00
be4685ab7b
* And fix filesize estimate for byterange downloads Closes #2001 Authored by: Lesmiscore, Jules-A, pukkandan
394 lines
17 KiB
Python
394 lines
17 KiB
Python
from __future__ import unicode_literals
|
|
|
|
import os
|
|
import ssl
|
|
import time
|
|
import random
|
|
|
|
from .common import FileDownloader
|
|
from ..compat import (
|
|
compat_str,
|
|
compat_urllib_error,
|
|
compat_http_client
|
|
)
|
|
from ..utils import (
|
|
ContentTooShortError,
|
|
encodeFilename,
|
|
int_or_none,
|
|
parse_http_range,
|
|
sanitized_Request,
|
|
ThrottledDownload,
|
|
try_get,
|
|
write_xattr,
|
|
XAttrMetadataError,
|
|
XAttrUnavailableError,
|
|
)
|
|
|
|
RESPONSE_READ_EXCEPTIONS = (TimeoutError, ConnectionError, ssl.SSLError, compat_http_client.HTTPException)
|
|
|
|
|
|
class HttpFD(FileDownloader):
|
|
def real_download(self, filename, info_dict):
|
|
url = info_dict['url']
|
|
request_data = info_dict.get('request_data', None)
|
|
|
|
class DownloadContext(dict):
|
|
__getattr__ = dict.get
|
|
__setattr__ = dict.__setitem__
|
|
__delattr__ = dict.__delitem__
|
|
|
|
ctx = DownloadContext()
|
|
ctx.filename = filename
|
|
ctx.tmpfilename = self.temp_name(filename)
|
|
ctx.stream = None
|
|
|
|
# Do not include the Accept-Encoding header
|
|
headers = {'Youtubedl-no-compression': 'True'}
|
|
add_headers = info_dict.get('http_headers')
|
|
if add_headers:
|
|
headers.update(add_headers)
|
|
|
|
is_test = self.params.get('test', False)
|
|
chunk_size = self._TEST_FILE_SIZE if is_test else (
|
|
self.params.get('http_chunk_size')
|
|
or info_dict.get('downloader_options', {}).get('http_chunk_size')
|
|
or 0)
|
|
|
|
ctx.open_mode = 'wb'
|
|
ctx.resume_len = 0
|
|
ctx.block_size = self.params.get('buffersize', 1024)
|
|
ctx.start_time = time.time()
|
|
ctx.chunk_size = None
|
|
throttle_start = None
|
|
|
|
# parse given Range
|
|
req_start, req_end, _ = parse_http_range(headers.get('Range'))
|
|
|
|
if self.params.get('continuedl', True):
|
|
# Establish possible resume length
|
|
if os.path.isfile(encodeFilename(ctx.tmpfilename)):
|
|
ctx.resume_len = os.path.getsize(
|
|
encodeFilename(ctx.tmpfilename))
|
|
|
|
ctx.is_resume = ctx.resume_len > 0
|
|
|
|
count = 0
|
|
retries = self.params.get('retries', 0)
|
|
|
|
class SucceedDownload(Exception):
|
|
pass
|
|
|
|
class RetryDownload(Exception):
|
|
def __init__(self, source_error):
|
|
self.source_error = source_error
|
|
|
|
class NextFragment(Exception):
|
|
pass
|
|
|
|
def set_range(req, start, end):
|
|
range_header = 'bytes=%d-' % start
|
|
if end:
|
|
range_header += compat_str(end)
|
|
req.add_header('Range', range_header)
|
|
|
|
def establish_connection():
|
|
ctx.chunk_size = (random.randint(int(chunk_size * 0.95), chunk_size)
|
|
if not is_test and chunk_size else chunk_size)
|
|
if ctx.resume_len > 0:
|
|
range_start = ctx.resume_len
|
|
if req_start is not None:
|
|
# offset the beginning of Range to be within request
|
|
range_start += req_start
|
|
if ctx.is_resume:
|
|
self.report_resuming_byte(ctx.resume_len)
|
|
ctx.open_mode = 'ab'
|
|
elif req_start is not None:
|
|
range_start = req_start
|
|
elif ctx.chunk_size > 0:
|
|
range_start = 0
|
|
else:
|
|
range_start = None
|
|
ctx.is_resume = False
|
|
|
|
if ctx.chunk_size:
|
|
chunk_aware_end = range_start + ctx.chunk_size - 1
|
|
# we're not allowed to download outside Range
|
|
range_end = chunk_aware_end if req_end is None else min(chunk_aware_end, req_end)
|
|
elif req_end is not None:
|
|
# there's no need for chunked downloads, so download until the end of Range
|
|
range_end = req_end
|
|
else:
|
|
range_end = None
|
|
|
|
if try_get(None, lambda _: range_start > range_end):
|
|
ctx.resume_len = 0
|
|
ctx.open_mode = 'wb'
|
|
raise RetryDownload(Exception(f'Conflicting range. (start={range_start} > end={range_end})'))
|
|
|
|
if try_get(None, lambda _: range_end >= ctx.content_len):
|
|
range_end = ctx.content_len - 1
|
|
|
|
request = sanitized_Request(url, request_data, headers)
|
|
has_range = range_start is not None
|
|
if has_range:
|
|
set_range(request, range_start, range_end)
|
|
# Establish connection
|
|
try:
|
|
ctx.data = self.ydl.urlopen(request)
|
|
# When trying to resume, Content-Range HTTP header of response has to be checked
|
|
# to match the value of requested Range HTTP header. This is due to a webservers
|
|
# that don't support resuming and serve a whole file with no Content-Range
|
|
# set in response despite of requested Range (see
|
|
# https://github.com/ytdl-org/youtube-dl/issues/6057#issuecomment-126129799)
|
|
if has_range:
|
|
content_range = ctx.data.headers.get('Content-Range')
|
|
content_range_start, content_range_end, content_len = parse_http_range(content_range)
|
|
if content_range_start is not None and range_start == content_range_start:
|
|
# Content-Range is present and matches requested Range, resume is possible
|
|
accept_content_len = (
|
|
# Non-chunked download
|
|
not ctx.chunk_size
|
|
# Chunked download and requested piece or
|
|
# its part is promised to be served
|
|
or content_range_end == range_end
|
|
or content_len < range_end)
|
|
if accept_content_len:
|
|
ctx.content_len = content_len
|
|
ctx.data_len = min(content_len, req_end or content_len) - (req_start or 0)
|
|
return
|
|
# Content-Range is either not present or invalid. Assuming remote webserver is
|
|
# trying to send the whole file, resume is not possible, so wiping the local file
|
|
# and performing entire redownload
|
|
self.report_unable_to_resume()
|
|
ctx.resume_len = 0
|
|
ctx.open_mode = 'wb'
|
|
ctx.data_len = ctx.content_len = int_or_none(ctx.data.info().get('Content-length', None))
|
|
except (compat_urllib_error.HTTPError, ) as err:
|
|
if err.code == 416:
|
|
# Unable to resume (requested range not satisfiable)
|
|
try:
|
|
# Open the connection again without the range header
|
|
ctx.data = self.ydl.urlopen(
|
|
sanitized_Request(url, request_data, headers))
|
|
content_length = ctx.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 (ctx.resume_len - 100 < int(content_length) < ctx.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(ctx.filename)
|
|
self.try_rename(ctx.tmpfilename, ctx.filename)
|
|
self._hook_progress({
|
|
'filename': ctx.filename,
|
|
'status': 'finished',
|
|
'downloaded_bytes': ctx.resume_len,
|
|
'total_bytes': ctx.resume_len,
|
|
}, info_dict)
|
|
raise SucceedDownload()
|
|
else:
|
|
# The length does not match, we start the download over
|
|
self.report_unable_to_resume()
|
|
ctx.resume_len = 0
|
|
ctx.open_mode = 'wb'
|
|
return
|
|
elif err.code < 500 or err.code >= 600:
|
|
# Unexpected HTTP error
|
|
raise
|
|
raise RetryDownload(err)
|
|
except compat_urllib_error.URLError as err:
|
|
if isinstance(err.reason, ssl.CertificateError):
|
|
raise
|
|
raise RetryDownload(err)
|
|
# In urllib.request.AbstractHTTPHandler, the response is partially read on request.
|
|
# Any errors that occur during this will not be wrapped by URLError
|
|
except RESPONSE_READ_EXCEPTIONS as err:
|
|
raise RetryDownload(err)
|
|
|
|
def download():
|
|
nonlocal throttle_start
|
|
data_len = ctx.data.info().get('Content-length', None)
|
|
|
|
# Range HTTP header may be ignored/unsupported by a webserver
|
|
# (e.g. extractor/scivee.py, extractor/bambuser.py).
|
|
# However, for a test we still would like to download just a piece of a file.
|
|
# To achieve this we limit data_len to _TEST_FILE_SIZE and manually control
|
|
# block size when downloading a file.
|
|
if is_test and (data_len is None or int(data_len) > self._TEST_FILE_SIZE):
|
|
data_len = self._TEST_FILE_SIZE
|
|
|
|
if data_len is not None:
|
|
data_len = int(data_len) + ctx.resume_len
|
|
min_data_len = self.params.get('min_filesize')
|
|
max_data_len = self.params.get('max_filesize')
|
|
if min_data_len is not None and data_len < min_data_len:
|
|
self.to_screen('\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('\r[download] File is larger than max-filesize (%s bytes > %s bytes). Aborting.' % (data_len, max_data_len))
|
|
return False
|
|
|
|
byte_counter = 0 + ctx.resume_len
|
|
block_size = ctx.block_size
|
|
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
|
|
|
|
def retry(e):
|
|
to_stdout = ctx.tmpfilename == '-'
|
|
if ctx.stream is not None:
|
|
if not to_stdout:
|
|
ctx.stream.close()
|
|
ctx.stream = None
|
|
ctx.resume_len = byte_counter if to_stdout else os.path.getsize(encodeFilename(ctx.tmpfilename))
|
|
raise RetryDownload(e)
|
|
|
|
while True:
|
|
try:
|
|
# Download and write
|
|
data_block = ctx.data.read(block_size if not is_test else min(block_size, data_len - byte_counter))
|
|
except RESPONSE_READ_EXCEPTIONS as err:
|
|
retry(err)
|
|
|
|
byte_counter += len(data_block)
|
|
|
|
# exit loop when download is finished
|
|
if len(data_block) == 0:
|
|
break
|
|
|
|
# Open destination file just in time
|
|
if ctx.stream is None:
|
|
try:
|
|
ctx.stream, ctx.tmpfilename = self.sanitize_open(
|
|
ctx.tmpfilename, ctx.open_mode)
|
|
assert ctx.stream is not None
|
|
ctx.filename = self.undo_temp_name(ctx.tmpfilename)
|
|
self.report_destination(ctx.filename)
|
|
except (OSError, IOError) as err:
|
|
self.report_error('unable to open for writing: %s' % str(err))
|
|
return False
|
|
|
|
if self.params.get('xattr_set_filesize', False) and data_len is not None:
|
|
try:
|
|
write_xattr(ctx.tmpfilename, 'user.ytdl.filesize', str(data_len).encode('utf-8'))
|
|
except (XAttrUnavailableError, XAttrMetadataError) as err:
|
|
self.report_error('unable to set filesize xattr: %s' % str(err))
|
|
|
|
try:
|
|
ctx.stream.write(data_block)
|
|
except (IOError, OSError) as err:
|
|
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 - ctx.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, now, byte_counter - ctx.resume_len)
|
|
if ctx.data_len is None:
|
|
eta = None
|
|
else:
|
|
eta = self.calc_eta(start, time.time(), ctx.data_len - ctx.resume_len, byte_counter - ctx.resume_len)
|
|
|
|
self._hook_progress({
|
|
'status': 'downloading',
|
|
'downloaded_bytes': byte_counter,
|
|
'total_bytes': ctx.data_len,
|
|
'tmpfilename': ctx.tmpfilename,
|
|
'filename': ctx.filename,
|
|
'eta': eta,
|
|
'speed': speed,
|
|
'elapsed': now - ctx.start_time,
|
|
'ctx_id': info_dict.get('ctx_id'),
|
|
}, info_dict)
|
|
|
|
if data_len is not None and byte_counter == data_len:
|
|
break
|
|
|
|
if speed and speed < (self.params.get('throttledratelimit') or 0):
|
|
# The speed must stay below the limit for 3 seconds
|
|
# This prevents raising error when the speed temporarily goes down
|
|
if throttle_start is None:
|
|
throttle_start = now
|
|
elif now - throttle_start > 3:
|
|
if ctx.stream is not None and ctx.tmpfilename != '-':
|
|
ctx.stream.close()
|
|
raise ThrottledDownload()
|
|
elif speed:
|
|
throttle_start = None
|
|
|
|
if not is_test and ctx.chunk_size and ctx.content_len is not None and byte_counter < ctx.content_len:
|
|
ctx.resume_len = byte_counter
|
|
# ctx.block_size = block_size
|
|
raise NextFragment()
|
|
|
|
if ctx.stream is None:
|
|
self.to_stderr('\n')
|
|
self.report_error('Did not get any data blocks')
|
|
return False
|
|
if ctx.tmpfilename != '-':
|
|
ctx.stream.close()
|
|
|
|
if data_len is not None and byte_counter != data_len:
|
|
err = ContentTooShortError(byte_counter, int(data_len))
|
|
if count <= retries:
|
|
retry(err)
|
|
raise err
|
|
|
|
self.try_rename(ctx.tmpfilename, ctx.filename)
|
|
|
|
# Update file modification time
|
|
if self.params.get('updatetime', True):
|
|
info_dict['filetime'] = self.try_utime(ctx.filename, ctx.data.info().get('last-modified', None))
|
|
|
|
self._hook_progress({
|
|
'downloaded_bytes': byte_counter,
|
|
'total_bytes': byte_counter,
|
|
'filename': ctx.filename,
|
|
'status': 'finished',
|
|
'elapsed': time.time() - ctx.start_time,
|
|
'ctx_id': info_dict.get('ctx_id'),
|
|
}, info_dict)
|
|
|
|
return True
|
|
|
|
while count <= retries:
|
|
try:
|
|
establish_connection()
|
|
return download()
|
|
except RetryDownload as e:
|
|
count += 1
|
|
if count <= retries:
|
|
self.report_retry(e.source_error, count, retries)
|
|
else:
|
|
self.to_screen(f'[download] Got server HTTP error: {e.source_error}')
|
|
continue
|
|
except NextFragment:
|
|
continue
|
|
except SucceedDownload:
|
|
return True
|
|
|
|
self.report_error('giving up after %s retries' % retries)
|
|
return False
|