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Introduce --http-chunk-size

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Sergey M․ 2018-01-28 13:21:45 +07:00
parent e2e18694db
commit ba515388b8
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4 changed files with 213 additions and 22 deletions
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101
youtube_dl/downloader/http.py
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@ -7,10 +7,14 @@ import time
import re
from .common import FileDownloader
from ..compat import compat_urllib_error
from ..compat import (
compat_str,
compat_urllib_error,
)
from ..utils import (
ContentTooShortError,
encodeFilename,
int_or_none,
sanitize_open,
sanitized_Request,
write_xattr,
@ -42,17 +46,22 @@ class HttpFD(FileDownloader):
request = sanitized_Request(url, None, headers)
is_test = self.params.get('test', False)
if is_test:
request.add_header('Range', 'bytes=0-%s' % str(self._TEST_FILE_SIZE - 1))
chunk_size = self._TEST_FILE_SIZE if is_test else (
self.params.get('http_chunk_size') or 0)
ctx.open_mode = 'wb'
ctx.resume_len = 0
ctx.data_len = None
ctx.block_size = self.params.get('buffersize', 1024)
ctx.start_time = time.time()
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.resume_len = os.path.getsize(
encodeFilename(ctx.tmpfilename))
ctx.is_resume = ctx.resume_len > 0
count = 0
retries = self.params.get('retries', 0)
@ -64,11 +73,33 @@ class HttpFD(FileDownloader):
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():
if ctx.resume_len != 0:
self.report_resuming_byte(ctx.resume_len)
request.add_header('Range', 'bytes=%d-' % ctx.resume_len)
if ctx.resume_len > 0:
range_start = ctx.resume_len
if ctx.is_resume:
self.report_resuming_byte(ctx.resume_len)
ctx.open_mode = 'ab'
elif chunk_size > 0:
range_start = 0
else:
range_start = None
ctx.is_resume = False
range_end = range_start + chunk_size - 1 if chunk_size else None
if range_end and ctx.data_len is not None and range_end >= ctx.data_len:
range_end = ctx.data_len - 1
has_range = range_start is not None
ctx.has_range = has_range
if has_range:
set_range(request, range_start, range_end)
# Establish connection
try:
ctx.data = self.ydl.urlopen(request)
@ -77,25 +108,35 @@ class HttpFD(FileDownloader):
# 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/rg3/youtube-dl/issues/6057#issuecomment-126129799)
if ctx.resume_len > 0:
if has_range:
content_range = ctx.data.headers.get('Content-Range')
if content_range:
content_range_m = re.search(r'bytes (\d+)-', content_range)
content_range_m = re.search(r'bytes (\d+)-(\d+)?(?:/(\d+))?', content_range)
# Content-Range is present and matches requested Range, resume is possible
if content_range_m and ctx.resume_len == int(content_range_m.group(1)):
return
if content_range_m:
if range_start == int(content_range_m.group(1)):
content_range_end = int_or_none(content_range_m.group(2))
content_len = int_or_none(content_range_m.group(3))
accept_content_len = (
# Non-chunked download
not chunk_size or
# Chunked download and requested piece or
# its part is promised to be served
content_range_end == range_end or
content_len < range_end)
if accept_content_len:
ctx.data_len = content_len
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 = int_or_none(ctx.data.info().get('Content-length', None))
return
except (compat_urllib_error.HTTPError, ) as err:
if (err.code < 500 or err.code >= 600) and err.code != 416:
# Unexpected HTTP error
raise
elif err.code == 416:
if err.code == 416:
# Unable to resume (requested range not satisfiable)
try:
# Open the connection again without the range header
@ -130,6 +171,15 @@ class HttpFD(FileDownloader):
ctx.resume_len = 0
ctx.open_mode = 'wb'
return
elif err.code == 302:
if not chunk_size:
raise
# HTTP Error 302: The HTTP server returned a redirect error that would lead to an infinite loop.
# may happen during chunk downloading. This is usually fixed
# with a retry.
elif err.code < 500 or err.code >= 600:
# Unexpected HTTP error
raise
raise RetryDownload(err)
except socket.error as err:
if err.errno != errno.ECONNRESET:
@ -160,7 +210,7 @@ class HttpFD(FileDownloader):
return False
byte_counter = 0 + ctx.resume_len
block_size = self.params.get('buffersize', 1024)
block_size = ctx.block_size
start = time.time()
# measure time over whole while-loop, so slow_down() and best_block_size() work together properly
@ -233,25 +283,30 @@ class HttpFD(FileDownloader):
# Progress message
speed = self.calc_speed(start, now, byte_counter - ctx.resume_len)
if data_len is None:
if ctx.data_len is None:
eta = None
else:
eta = self.calc_eta(start, time.time(), data_len - ctx.resume_len, byte_counter - ctx.resume_len)
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': data_len,
'total_bytes': ctx.data_len,
'tmpfilename': ctx.tmpfilename,
'filename': ctx.filename,
'eta': eta,
'speed': speed,
'elapsed': now - start,
'elapsed': now - ctx.start_time,
})
if is_test and byte_counter == data_len:
break
if not is_test and chunk_size and ctx.data_len is not None and byte_counter < ctx.data_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')
@ -276,7 +331,7 @@ class HttpFD(FileDownloader):
'total_bytes': byte_counter,
'filename': ctx.filename,
'status': 'finished',
'elapsed': time.time() - start,
'elapsed': time.time() - ctx.start_time,
})
return True
@ -290,6 +345,8 @@ class HttpFD(FileDownloader):
if count <= retries:
self.report_retry(e.source_error, count, retries)
continue
except NextFragment:
continue
except SucceedDownload:
return True