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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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123
test/test_downloader_http.py Normal file
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@ -0,0 +1,123 @@
#!/usr/bin/env python
# coding: utf-8
from __future__ import unicode_literals
# Allow direct execution
import os
import re
import sys
import unittest
sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
from youtube_dl import YoutubeDL
from youtube_dl.compat import compat_http_server
from youtube_dl.downloader.http import HttpFD
from youtube_dl.utils import encodeFilename
import ssl
import threading
TEST_DIR = os.path.dirname(os.path.abspath(__file__))
def http_server_port(httpd):
if os.name == 'java' and isinstance(httpd.socket, ssl.SSLSocket):
# In Jython SSLSocket is not a subclass of socket.socket
sock = httpd.socket.sock
else:
sock = httpd.socket
return sock.getsockname()[1]
TEST_SIZE = 10 * 1024
class HTTPTestRequestHandler(compat_http_server.BaseHTTPRequestHandler):
def log_message(self, format, *args):
pass
def send_content_range(self, total=None):
range_header = self.headers.get('Range')
start = end = None
if range_header:
mobj = re.search(r'^bytes=(\d+)-(\d+)', range_header)
if mobj:
start = int(mobj.group(1))
end = int(mobj.group(2))
valid_range = start is not None and end is not None
if valid_range:
content_range = 'bytes %d-%d' % (start, end)
if total:
content_range += '/%d' % total
self.send_header('Content-Range', content_range)
return (end - start + 1) if valid_range else total
def serve(self, range=True, content_length=True):
self.send_response(200)
self.send_header('Content-Type', 'video/mp4')
size = TEST_SIZE
if range:
size = self.send_content_range(TEST_SIZE)
if content_length:
self.send_header('Content-Length', size)
self.end_headers()
self.wfile.write(b'#' * size)
def do_GET(self):
if self.path == '/regular':
self.serve()
elif self.path == '/no-content-length':
self.serve(content_length=False)
elif self.path == '/no-range':
self.serve(range=False)
elif self.path == '/no-range-no-content-length':
self.serve(range=False, content_length=False)
else:
assert False
class FakeLogger(object):
def debug(self, msg):
pass
def warning(self, msg):
pass
def error(self, msg):
pass
class TestHttpFD(unittest.TestCase):
def setUp(self):
self.httpd = compat_http_server.HTTPServer(
('127.0.0.1', 0), HTTPTestRequestHandler)
self.port = http_server_port(self.httpd)
self.server_thread = threading.Thread(target=self.httpd.serve_forever)
self.server_thread.daemon = True
self.server_thread.start()
def download(self, params, ep):
params['logger'] = FakeLogger()
ydl = YoutubeDL(params)
downloader = HttpFD(ydl, params)
filename = 'testfile.mp4'
self.assertTrue(downloader.real_download(filename, {
'url': 'http://127.0.0.1:%d/%s' % (self.port, ep),
}))
self.assertEqual(os.path.getsize(encodeFilename(filename)), TEST_SIZE)
os.remove(encodeFilename(filename))
def download_all(self, params):
for ep in ('regular', 'no-content-length', 'no-range', 'no-range-no-content-length'):
self.download(params, ep)
def test_regular(self):
self.download_all({})
def test_chunked(self):
self.download_all({
'http_chunk_size': 1000,
})
if __name__ == '__main__':
unittest.main()

6
youtube_dl/__init__.py
View File

@ -191,6 +191,11 @@ def _real_main(argv=None):
if numeric_buffersize is None:
parser.error('invalid buffer size specified')
opts.buffersize = numeric_buffersize
if opts.http_chunk_size is not None:
numeric_chunksize = FileDownloader.parse_bytes(opts.http_chunk_size)
if not numeric_chunksize:
parser.error('invalid http chunk size specified')
opts.http_chunk_size = numeric_chunksize
if opts.playliststart <= 0:
raise ValueError('Playlist start must be positive')
if opts.playlistend not in (-1, None) and opts.playlistend < opts.playliststart:
@ -346,6 +351,7 @@ def _real_main(argv=None):
'keep_fragments': opts.keep_fragments,
'buffersize': opts.buffersize,
'noresizebuffer': opts.noresizebuffer,
'http_chunk_size': opts.http_chunk_size,
'continuedl': opts.continue_dl,
'noprogress': opts.noprogress,
'progress_with_newline': opts.progress_with_newline,

97
youtube_dl/downloader/http.py
View File

@ -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:
if ctx.resume_len > 0:
range_start = ctx.resume_len
if ctx.is_resume:
self.report_resuming_byte(ctx.resume_len)
request.add_header('Range', 'bytes=%d-' % 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)
@ -77,12 +108,24 @@ 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)):
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
@ -90,12 +133,10 @@ class HttpFD(FileDownloader):
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

5
youtube_dl/options.py
View File

@ -478,6 +478,11 @@ def parseOpts(overrideArguments=None):
'--no-resize-buffer',
action='store_true', dest='noresizebuffer', default=False,
help='Do not automatically adjust the buffer size. By default, the buffer size is automatically resized from an initial value of SIZE.')
downloader.add_option(
'--http-chunk-size',
dest='http_chunk_size', metavar='SIZE', default=None,
help='Size of a chunk for chunk-based HTTP downloading (e.g. 10485760 or 10M) (default is disabled). '
'May be useful for bypassing bandwidth throttling imposed by a webserver (experimental)')
downloader.add_option(
'--test',
action='store_true', dest='test', default=False,