+from __future__ import unicode_literals
+
+import errno
import os
+import socket
import time
+import random
+import re
from .common import FileDownloader
-from ..utils import (
- compat_urllib_request,
+from ..compat import (
+ compat_str,
compat_urllib_error,
+)
+from ..utils import (
ContentTooShortError,
-
encodeFilename,
+ int_or_none,
sanitize_open,
- format_bytes,
+ sanitized_Request,
+ write_xattr,
+ XAttrMetadataError,
+ XAttrUnavailableError,
)
class HttpFD(FileDownloader):
def real_download(self, filename, info_dict):
url = info_dict['url']
- tmpfilename = self.temp_name(filename)
- stream = 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'}
- if 'user_agent' in info_dict:
- headers['Youtubedl-user-agent'] = info_dict['user_agent']
- basic_request = compat_urllib_request.Request(url, None, headers)
- request = compat_urllib_request.Request(url, None, headers)
-
- if self.params.get('test', False):
- request.add_header('Range', 'bytes=0-10240')
-
- # Establish possible resume length
- if os.path.isfile(encodeFilename(tmpfilename)):
- resume_len = os.path.getsize(encodeFilename(tmpfilename))
- else:
- resume_len = 0
-
- open_mode = 'wb'
- if resume_len != 0:
- if self.params.get('continuedl', False):
- self.report_resuming_byte(resume_len)
- request.add_header('Range', 'bytes=%d-' % resume_len)
- open_mode = 'ab'
- else:
- resume_len = 0
+ 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 (
+ info_dict.get('downloader_options', {}).get('http_chunk_size')
+ or 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()
+ ctx.chunk_size = None
+
+ 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)
- while count <= retries:
+
+ 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 ctx.is_resume:
+ self.report_resuming_byte(ctx.resume_len)
+ ctx.open_mode = 'ab'
+ elif ctx.chunk_size > 0:
+ range_start = 0
+ else:
+ range_start = None
+ ctx.is_resume = False
+ range_end = range_start + ctx.chunk_size - 1 if ctx.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
+ request = sanitized_Request(url, None, headers)
+ if has_range:
+ set_range(request, range_start, range_end)
# Establish connection
try:
- data = compat_urllib_request.urlopen(request)
- break
+ 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')
+ if 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:
+ 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 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.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
- data = compat_urllib_request.urlopen(basic_request)
- content_length = data.info()['Content-Length']
+ ctx.data = self.ydl.urlopen(
+ sanitized_Request(url, None, 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
- (resume_len - 100 < int(content_length) < resume_len + 100)):
+ 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,
# 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(filename)
- self.try_rename(tmpfilename, filename)
+ self.report_file_already_downloaded(ctx.filename)
+ self.try_rename(ctx.tmpfilename, ctx.filename)
self._hook_progress({
- 'filename': filename,
+ 'filename': ctx.filename,
'status': 'finished',
+ 'downloaded_bytes': ctx.resume_len,
+ 'total_bytes': ctx.resume_len,
})
- return True
+ raise SucceedDownload()
else:
# The length does not match, we start the download over
self.report_unable_to_resume()
- open_mode = 'wb'
- break
- # Retry
- count += 1
- if count <= retries:
- self.report_retry(count, retries)
-
- if count > retries:
- self.report_error(u'giving up after %s retries' % retries)
- return False
-
- data_len = data.info().get('Content-length', None)
- if data_len is not None:
- data_len = int(data_len) + resume_len
- min_data_len = self.params.get("min_filesize", None)
- max_data_len = self.params.get("max_filesize", None)
- if min_data_len is not None and data_len < min_data_len:
- self.to_screen(u'\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(u'\r[download] File is larger than max-filesize (%s bytes > %s bytes). Aborting.' % (data_len, max_data_len))
- return False
+ 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 socket.error as err:
+ if err.errno != errno.ECONNRESET:
+ # Connection reset is no problem, just retry
+ raise
+ raise RetryDownload(err)
+
+ def download():
+ 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
- data_len_str = format_bytes(data_len)
- byte_counter = 0 + resume_len
- block_size = self.params.get('buffersize', 1024)
- start = time.time()
- while True:
- # Download and write
- before = time.time()
- data_block = data.read(block_size)
- after = time.time()
- if len(data_block) == 0:
- break
- byte_counter += len(data_block)
-
- # Open file just in time
- if stream is None:
+ def retry(e):
+ to_stdout = ctx.tmpfilename == '-'
+ 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:
- (stream, tmpfilename) = sanitize_open(tmpfilename, open_mode)
- assert stream is not None
- filename = self.undo_temp_name(tmpfilename)
- self.report_destination(filename)
- except (OSError, IOError) as err:
- self.report_error(u'unable to open for writing: %s' % str(err))
+ # Download and write
+ data_block = ctx.data.read(block_size if not is_test else min(block_size, data_len - byte_counter))
+ # socket.timeout is a subclass of socket.error but may not have
+ # errno set
+ except socket.timeout as e:
+ retry(e)
+ except socket.error as e:
+ if e.errno not in (errno.ECONNRESET, errno.ETIMEDOUT):
+ raise
+ retry(e)
+
+ 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 = 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
- try:
- stream.write(data_block)
- except (IOError, OSError) as err:
- self.to_stderr(u"\n")
- self.report_error(u'unable to write data: %s' % str(err))
+
+ # 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,
+ })
+
+ if is_test and byte_counter == data_len:
+ break
+
+ if not is_test and ctx.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')
return False
- if not self.params.get('noresizebuffer', False):
- block_size = self.best_block_size(after - before, len(data_block))
+ if ctx.tmpfilename != '-':
+ ctx.stream.close()
- # Progress message
- speed = self.calc_speed(start, time.time(), byte_counter - resume_len)
- if data_len is None:
- eta = percent = None
- else:
- percent = self.calc_percent(byte_counter, data_len)
- eta = self.calc_eta(start, time.time(), data_len - resume_len, byte_counter - resume_len)
- self.report_progress(percent, data_len_str, speed, eta)
+ 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': data_len,
- 'tmpfilename': tmpfilename,
- 'filename': filename,
- 'status': 'downloading',
- 'eta': eta,
- 'speed': speed,
+ 'total_bytes': byte_counter,
+ 'filename': ctx.filename,
+ 'status': 'finished',
+ 'elapsed': time.time() - ctx.start_time,
})
- # Apply rate limit
- self.slow_down(start, byte_counter - resume_len)
-
- if stream is None:
- self.to_stderr(u"\n")
- self.report_error(u'Did not get any data blocks')
- return False
- stream.close()
- self.report_finish(data_len_str, (time.time() - start))
- if data_len is not None and byte_counter != data_len:
- raise ContentTooShortError(byte_counter, int(data_len))
- self.try_rename(tmpfilename, filename)
-
- # Update file modification time
- if self.params.get('updatetime', True):
- info_dict['filetime'] = self.try_utime(filename, data.info().get('last-modified', None))
-
- self._hook_progress({
- 'downloaded_bytes': byte_counter,
- 'total_bytes': byte_counter,
- 'filename': filename,
- 'status': 'finished',
- })
-
- return True
+ 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)
+ continue
+ except NextFragment:
+ continue
+ except SucceedDownload:
+ return True
+
+ self.report_error('giving up after %s retries' % retries)
+ return False
Rapsys Git / youtubedl / blobdiff