X-Git-Url: https://git.rapsys.eu/youtubedl/blobdiff_plain/86dd638c6d0307289d01aaff40a4f184e4e62191..fa9caede2ef0b8d916bf9c4c7be902d624afc1f0:/youtube_dl/FileDownloader.py

diff --git a/youtube_dl/FileDownloader.py b/youtube_dl/FileDownloader.py
new file mode 100644
index 0000000..14e872a
--- /dev/null
+++ b/youtube_dl/FileDownloader.py
@@ -0,0 +1,689 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+import httplib
+import math
+import os
+import re
+import socket
+import subprocess
+import sys
+import time
+import urllib2
+
+if os.name == 'nt':
+	import ctypes
+	
+from utils import *
+
+
+class FileDownloader(object):
+	"""File Downloader class.
+
+	File downloader objects are the ones responsible of downloading the
+	actual video file and writing it to disk if the user has requested
+	it, among some other tasks. In most cases there should be one per
+	program. As, given a video URL, the downloader doesn't know how to
+	extract all the needed information, task that InfoExtractors do, it
+	has to pass the URL to one of them.
+
+	For this, file downloader objects have a method that allows
+	InfoExtractors to be registered in a given order. When it is passed
+	a URL, the file downloader handles it to the first InfoExtractor it
+	finds that reports being able to handle it. The InfoExtractor extracts
+	all the information about the video or videos the URL refers to, and
+	asks the FileDownloader to process the video information, possibly
+	downloading the video.
+
+	File downloaders accept a lot of parameters. In order not to saturate
+	the object constructor with arguments, it receives a dictionary of
+	options instead. These options are available through the params
+	attribute for the InfoExtractors to use. The FileDownloader also
+	registers itself as the downloader in charge for the InfoExtractors
+	that are added to it, so this is a "mutual registration".
+
+	Available options:
+
+	username:         Username for authentication purposes.
+	password:         Password for authentication purposes.
+	usenetrc:         Use netrc for authentication instead.
+	quiet:            Do not print messages to stdout.
+	forceurl:         Force printing final URL.
+	forcetitle:       Force printing title.
+	forcethumbnail:   Force printing thumbnail URL.
+	forcedescription: Force printing description.
+	forcefilename:    Force printing final filename.
+	simulate:         Do not download the video files.
+	format:           Video format code.
+	format_limit:     Highest quality format to try.
+	outtmpl:          Template for output names.
+	ignoreerrors:     Do not stop on download errors.
+	ratelimit:        Download speed limit, in bytes/sec.
+	nooverwrites:     Prevent overwriting files.
+	retries:          Number of times to retry for HTTP error 5xx
+	continuedl:       Try to continue downloads if possible.
+	noprogress:       Do not print the progress bar.
+	playliststart:    Playlist item to start at.
+	playlistend:      Playlist item to end at.
+	matchtitle:       Download only matching titles.
+	rejecttitle:      Reject downloads for matching titles.
+	logtostderr:      Log messages to stderr instead of stdout.
+	consoletitle:     Display progress in console window's titlebar.
+	nopart:           Do not use temporary .part files.
+	updatetime:       Use the Last-modified header to set output file timestamps.
+	writedescription: Write the video description to a .description file
+	writeinfojson:    Write the video description to a .info.json file
+	writesubtitles:   Write the video subtitles to a .srt file
+	subtitleslang:    Language of the subtitles to download
+	"""
+
+	params = None
+	_ies = []
+	_pps = []
+	_download_retcode = None
+	_num_downloads = None
+	_screen_file = None
+
+	def __init__(self, params):
+		"""Create a FileDownloader object with the given options."""
+		self._ies = []
+		self._pps = []
+		self._download_retcode = 0
+		self._num_downloads = 0
+		self._screen_file = [sys.stdout, sys.stderr][params.get('logtostderr', False)]
+		self.params = params
+
+	@staticmethod
+	def format_bytes(bytes):
+		if bytes is None:
+			return 'N/A'
+		if type(bytes) is str:
+			bytes = float(bytes)
+		if bytes == 0.0:
+			exponent = 0
+		else:
+			exponent = long(math.log(bytes, 1024.0))
+		suffix = 'bkMGTPEZY'[exponent]
+		converted = float(bytes) / float(1024 ** exponent)
+		return '%.2f%s' % (converted, suffix)
+
+	@staticmethod
+	def calc_percent(byte_counter, data_len):
+		if data_len is None:
+			return '---.-%'
+		return '%6s' % ('%3.1f%%' % (float(byte_counter) / float(data_len) * 100.0))
+
+	@staticmethod
+	def calc_eta(start, now, total, current):
+		if total is None:
+			return '--:--'
+		dif = now - start
+		if current == 0 or dif < 0.001: # One millisecond
+			return '--:--'
+		rate = float(current) / dif
+		eta = long((float(total) - float(current)) / rate)
+		(eta_mins, eta_secs) = divmod(eta, 60)
+		if eta_mins > 99:
+			return '--:--'
+		return '%02d:%02d' % (eta_mins, eta_secs)
+
+	@staticmethod
+	def calc_speed(start, now, bytes):
+		dif = now - start
+		if bytes == 0 or dif < 0.001: # One millisecond
+			return '%10s' % '---b/s'
+		return '%10s' % ('%s/s' % FileDownloader.format_bytes(float(bytes) / dif))
+
+	@staticmethod
+	def best_block_size(elapsed_time, bytes):
+		new_min = max(bytes / 2.0, 1.0)
+		new_max = min(max(bytes * 2.0, 1.0), 4194304) # Do not surpass 4 MB
+		if elapsed_time < 0.001:
+			return long(new_max)
+		rate = bytes / elapsed_time
+		if rate > new_max:
+			return long(new_max)
+		if rate < new_min:
+			return long(new_min)
+		return long(rate)
+
+	@staticmethod
+	def parse_bytes(bytestr):
+		"""Parse a string indicating a byte quantity into a long integer."""
+		matchobj = re.match(r'(?i)^(\d+(?:\.\d+)?)([kMGTPEZY]?)$', bytestr)
+		if matchobj is None:
+			return None
+		number = float(matchobj.group(1))
+		multiplier = 1024.0 ** 'bkmgtpezy'.index(matchobj.group(2).lower())
+		return long(round(number * multiplier))
+
+	def add_info_extractor(self, ie):
+		"""Add an InfoExtractor object to the end of the list."""
+		self._ies.append(ie)
+		ie.set_downloader(self)
+
+	def add_post_processor(self, pp):
+		"""Add a PostProcessor object to the end of the chain."""
+		self._pps.append(pp)
+		pp.set_downloader(self)
+
+	def to_screen(self, message, skip_eol=False):
+		"""Print message to stdout if not in quiet mode."""
+		assert type(message) == type(u'')
+		if not self.params.get('quiet', False):
+			terminator = [u'\n', u''][skip_eol]
+			output = message + terminator
+
+			if 'b' not in self._screen_file.mode or sys.version_info[0] < 3: # Python 2 lies about the mode of sys.stdout/sys.stderr
+				output = output.encode(preferredencoding(), 'ignore')
+			self._screen_file.write(output)
+			self._screen_file.flush()
+
+	def to_stderr(self, message):
+		"""Print message to stderr."""
+		print >>sys.stderr, message.encode(preferredencoding())
+
+	def to_cons_title(self, message):
+		"""Set console/terminal window title to message."""
+		if not self.params.get('consoletitle', False):
+			return
+		if os.name == 'nt' and ctypes.windll.kernel32.GetConsoleWindow():
+			# c_wchar_p() might not be necessary if `message` is
+			# already of type unicode()
+			ctypes.windll.kernel32.SetConsoleTitleW(ctypes.c_wchar_p(message))
+		elif 'TERM' in os.environ:
+			sys.stderr.write('\033]0;%s\007' % message.encode(preferredencoding()))
+
+	def fixed_template(self):
+		"""Checks if the output template is fixed."""
+		return (re.search(ur'(?u)%\(.+?\)s', self.params['outtmpl']) is None)
+
+	def trouble(self, message=None):
+		"""Determine action to take when a download problem appears.
+
+		Depending on if the downloader has been configured to ignore
+		download errors or not, this method may throw an exception or
+		not when errors are found, after printing the message.
+		"""
+		if message is not None:
+			self.to_stderr(message)
+		if not self.params.get('ignoreerrors', False):
+			raise DownloadError(message)
+		self._download_retcode = 1
+
+	def slow_down(self, start_time, 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()
+		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)
+
+	def temp_name(self, filename):
+		"""Returns a temporary filename for the given filename."""
+		if self.params.get('nopart', False) or filename == u'-' or \
+				(os.path.exists(encodeFilename(filename)) and not os.path.isfile(encodeFilename(filename))):
+			return filename
+		return filename + u'.part'
+
+	def undo_temp_name(self, filename):
+		if filename.endswith(u'.part'):
+			return filename[:-len(u'.part')]
+		return filename
+
+	def try_rename(self, old_filename, new_filename):
+		try:
+			if old_filename == new_filename:
+				return
+			os.rename(encodeFilename(old_filename), encodeFilename(new_filename))
+		except (IOError, OSError), err:
+			self.trouble(u'ERROR: unable to rename file')
+
+	def try_utime(self, filename, last_modified_hdr):
+		"""Try to set the last-modified time of the given file."""
+		if last_modified_hdr is None:
+			return
+		if not os.path.isfile(encodeFilename(filename)):
+			return
+		timestr = last_modified_hdr
+		if timestr is None:
+			return
+		filetime = timeconvert(timestr)
+		if filetime is None:
+			return filetime
+		try:
+			os.utime(filename, (time.time(), filetime))
+		except:
+			pass
+		return filetime
+
+	def report_writedescription(self, descfn):
+		""" Report that the description file is being written """
+		self.to_screen(u'[info] Writing video description to: ' + descfn)
+
+	def report_writesubtitles(self, srtfn):
+		""" Report that the subtitles file is being written """
+		self.to_screen(u'[info] Writing video subtitles to: ' + srtfn)
+
+	def report_writeinfojson(self, infofn):
+		""" Report that the metadata file has been written """
+		self.to_screen(u'[info] Video description metadata as JSON to: ' + infofn)
+
+	def report_destination(self, filename):
+		"""Report destination filename."""
+		self.to_screen(u'[download] Destination: ' + filename)
+
+	def report_progress(self, percent_str, data_len_str, speed_str, eta_str):
+		"""Report download progress."""
+		if self.params.get('noprogress', False):
+			return
+		self.to_screen(u'\r[download] %s of %s at %s ETA %s' %
+				(percent_str, data_len_str, speed_str, eta_str), skip_eol=True)
+		self.to_cons_title(u'youtube-dl - %s of %s at %s ETA %s' %
+				(percent_str.strip(), data_len_str.strip(), speed_str.strip(), eta_str.strip()))
+
+	def report_resuming_byte(self, resume_len):
+		"""Report attempt to resume at given byte."""
+		self.to_screen(u'[download] Resuming download at byte %s' % resume_len)
+
+	def report_retry(self, count, retries):
+		"""Report retry in case of HTTP error 5xx"""
+		self.to_screen(u'[download] Got server HTTP error. Retrying (attempt %d of %d)...' % (count, retries))
+
+	def report_file_already_downloaded(self, file_name):
+		"""Report file has already been fully downloaded."""
+		try:
+			self.to_screen(u'[download] %s has already been downloaded' % file_name)
+		except (UnicodeEncodeError), err:
+			self.to_screen(u'[download] The file has already been downloaded')
+
+	def report_unable_to_resume(self):
+		"""Report it was impossible to resume download."""
+		self.to_screen(u'[download] Unable to resume')
+
+	def report_finish(self):
+		"""Report download finished."""
+		if self.params.get('noprogress', False):
+			self.to_screen(u'[download] Download completed')
+		else:
+			self.to_screen(u'')
+
+	def increment_downloads(self):
+		"""Increment the ordinal that assigns a number to each file."""
+		self._num_downloads += 1
+
+	def prepare_filename(self, info_dict):
+		"""Generate the output filename."""
+		try:
+			template_dict = dict(info_dict)
+			template_dict['epoch'] = unicode(long(time.time()))
+			template_dict['autonumber'] = unicode('%05d' % self._num_downloads)
+			filename = self.params['outtmpl'] % template_dict
+			return filename
+		except (ValueError, KeyError), err:
+			self.trouble(u'ERROR: invalid system charset or erroneous output template')
+			return None
+
+	def _match_entry(self, info_dict):
+		""" Returns None iff the file should be downloaded """
+
+		title = info_dict['title']
+		matchtitle = self.params.get('matchtitle', False)
+		if matchtitle and not re.search(matchtitle, title, re.IGNORECASE):
+			return u'[download] "' + title + '" title did not match pattern "' + matchtitle + '"'
+		rejecttitle = self.params.get('rejecttitle', False)
+		if rejecttitle and re.search(rejecttitle, title, re.IGNORECASE):
+			return u'"' + title + '" title matched reject pattern "' + rejecttitle + '"'
+		return None
+
+	def process_info(self, info_dict):
+		"""Process a single dictionary returned by an InfoExtractor."""
+
+		info_dict['stitle'] = sanitize_filename(info_dict['title'])
+
+		reason = self._match_entry(info_dict)
+		if reason is not None:
+			self.to_screen(u'[download] ' + reason)
+			return
+
+		max_downloads = self.params.get('max_downloads')
+		if max_downloads is not None:
+			if self._num_downloads > int(max_downloads):
+				raise MaxDownloadsReached()
+
+		filename = self.prepare_filename(info_dict)
+		
+		# Forced printings
+		if self.params.get('forcetitle', False):
+			print info_dict['title'].encode(preferredencoding(), 'xmlcharrefreplace')
+		if self.params.get('forceurl', False):
+			print info_dict['url'].encode(preferredencoding(), 'xmlcharrefreplace')
+		if self.params.get('forcethumbnail', False) and 'thumbnail' in info_dict:
+			print info_dict['thumbnail'].encode(preferredencoding(), 'xmlcharrefreplace')
+		if self.params.get('forcedescription', False) and 'description' in info_dict:
+			print info_dict['description'].encode(preferredencoding(), 'xmlcharrefreplace')
+		if self.params.get('forcefilename', False) and filename is not None:
+			print filename.encode(preferredencoding(), 'xmlcharrefreplace')
+		if self.params.get('forceformat', False):
+			print info_dict['format'].encode(preferredencoding(), 'xmlcharrefreplace')
+
+		# Do nothing else if in simulate mode
+		if self.params.get('simulate', False):
+			return
+
+		if filename is None:
+			return
+
+		try:
+			dn = os.path.dirname(encodeFilename(filename))
+			if dn != '' and not os.path.exists(dn): # dn is already encoded
+				os.makedirs(dn)
+		except (OSError, IOError), err:
+			self.trouble(u'ERROR: unable to create directory ' + unicode(err))
+			return
+
+		if self.params.get('writedescription', False):
+			try:
+				descfn = filename + u'.description'
+				self.report_writedescription(descfn)
+				descfile = open(encodeFilename(descfn), 'wb')
+				try:
+					descfile.write(info_dict['description'].encode('utf-8'))
+				finally:
+					descfile.close()
+			except (OSError, IOError):
+				self.trouble(u'ERROR: Cannot write description file ' + descfn)
+				return
+				
+		if self.params.get('writesubtitles', False) and 'subtitles' in info_dict and info_dict['subtitles']:
+			# subtitles download errors are already managed as troubles in relevant IE
+			# that way it will silently go on when used with unsupporting IE 
+			try:
+				srtfn = filename.rsplit('.', 1)[0] + u'.srt'
+				self.report_writesubtitles(srtfn)
+				srtfile = open(encodeFilename(srtfn), 'wb')
+				try:
+					srtfile.write(info_dict['subtitles'].encode('utf-8'))
+				finally:
+					srtfile.close()
+			except (OSError, IOError):
+				self.trouble(u'ERROR: Cannot write subtitles file ' + descfn)
+				return
+
+		if self.params.get('writeinfojson', False):
+			infofn = filename + u'.info.json'
+			self.report_writeinfojson(infofn)
+			try:
+				json.dump
+			except (NameError,AttributeError):
+				self.trouble(u'ERROR: No JSON encoder found. Update to Python 2.6+, setup a json module, or leave out --write-info-json.')
+				return
+			try:
+				infof = open(encodeFilename(infofn), 'wb')
+				try:
+					json_info_dict = dict((k,v) for k,v in info_dict.iteritems() if not k in ('urlhandle',))
+					json.dump(json_info_dict, infof)
+				finally:
+					infof.close()
+			except (OSError, IOError):
+				self.trouble(u'ERROR: Cannot write metadata to JSON file ' + infofn)
+				return
+
+		if not self.params.get('skip_download', False):
+			if self.params.get('nooverwrites', False) and os.path.exists(encodeFilename(filename)):
+				success = True
+			else:
+				try:
+					success = self._do_download(filename, info_dict)
+				except (OSError, IOError), err:
+					raise UnavailableVideoError
+				except (urllib2.URLError, httplib.HTTPException, socket.error), err:
+					self.trouble(u'ERROR: unable to download video data: %s' % str(err))
+					return
+				except (ContentTooShortError, ), err:
+					self.trouble(u'ERROR: content too short (expected %s bytes and served %s)' % (err.expected, err.downloaded))
+					return
+	
+			if success:
+				try:
+					self.post_process(filename, info_dict)
+				except (PostProcessingError), err:
+					self.trouble(u'ERROR: postprocessing: %s' % str(err))
+					return
+
+	def download(self, url_list):
+		"""Download a given list of URLs."""
+		if len(url_list) > 1 and self.fixed_template():
+			raise SameFileError(self.params['outtmpl'])
+
+		for url in url_list:
+			suitable_found = False
+			for ie in self._ies:
+				# Go to next InfoExtractor if not suitable
+				if not ie.suitable(url):
+					continue
+
+				# Suitable InfoExtractor found
+				suitable_found = True
+
+				# Extract information from URL and process it
+				videos = ie.extract(url)
+				for video in videos or []:
+					try:
+						self.increment_downloads()
+						self.process_info(video)
+					except UnavailableVideoError:
+						self.trouble(u'\nERROR: unable to download video')
+
+				# Suitable InfoExtractor had been found; go to next URL
+				break
+
+			if not suitable_found:
+				self.trouble(u'ERROR: no suitable InfoExtractor: %s' % url)
+
+		return self._download_retcode
+
+	def post_process(self, filename, ie_info):
+		"""Run the postprocessing chain on the given file."""
+		info = dict(ie_info)
+		info['filepath'] = filename
+		for pp in self._pps:
+			info = pp.run(info)
+			if info is None:
+				break
+
+	def _download_with_rtmpdump(self, filename, url, player_url):
+		self.report_destination(filename)
+		tmpfilename = self.temp_name(filename)
+
+		# Check for rtmpdump first
+		try:
+			subprocess.call(['rtmpdump', '-h'], stdout=(file(os.path.devnull, 'w')), stderr=subprocess.STDOUT)
+		except (OSError, IOError):
+			self.trouble(u'ERROR: RTMP download detected but "rtmpdump" could not be run')
+			return False
+
+		# Download using rtmpdump. rtmpdump returns exit code 2 when
+		# the connection was interrumpted and resuming appears to be
+		# possible. This is part of rtmpdump's normal usage, AFAIK.
+		basic_args = ['rtmpdump', '-q'] + [[], ['-W', player_url]][player_url is not None] + ['-r', url, '-o', tmpfilename]
+		args = basic_args + [[], ['-e', '-k', '1']][self.params.get('continuedl', False)]
+		if self.params.get('verbose', False):
+			try:
+				import pipes
+				shell_quote = lambda args: ' '.join(map(pipes.quote, args))
+			except ImportError:
+				shell_quote = repr
+			self.to_screen(u'[debug] rtmpdump command line: ' + shell_quote(args))
+		retval = subprocess.call(args)
+		while retval == 2 or retval == 1:
+			prevsize = os.path.getsize(encodeFilename(tmpfilename))
+			self.to_screen(u'\r[rtmpdump] %s bytes' % prevsize, skip_eol=True)
+			time.sleep(5.0) # This seems to be needed
+			retval = subprocess.call(basic_args + ['-e'] + [[], ['-k', '1']][retval == 1])
+			cursize = os.path.getsize(encodeFilename(tmpfilename))
+			if prevsize == cursize and retval == 1:
+				break
+			 # Some rtmp streams seem abort after ~ 99.8%. Don't complain for those
+			if prevsize == cursize and retval == 2 and cursize > 1024:
+				self.to_screen(u'\r[rtmpdump] Could not download the whole video. This can happen for some advertisements.')
+				retval = 0
+				break
+		if retval == 0:
+			self.to_screen(u'\r[rtmpdump] %s bytes' % os.path.getsize(encodeFilename(tmpfilename)))
+			self.try_rename(tmpfilename, filename)
+			return True
+		else:
+			self.trouble(u'\nERROR: rtmpdump exited with code %d' % retval)
+			return False
+
+	def _do_download(self, filename, info_dict):
+		url = info_dict['url']
+		player_url = info_dict.get('player_url', None)
+
+		# Check file already present
+		if self.params.get('continuedl', False) and os.path.isfile(encodeFilename(filename)) and not self.params.get('nopart', False):
+			self.report_file_already_downloaded(filename)
+			return True
+
+		# Attempt to download using rtmpdump
+		if url.startswith('rtmp'):
+			return self._download_with_rtmpdump(filename, url, player_url)
+
+		tmpfilename = self.temp_name(filename)
+		stream = None
+
+		# Do not include the Accept-Encoding header
+		headers = {'Youtubedl-no-compression': 'True'}
+		basic_request = urllib2.Request(url, None, headers)
+		request = urllib2.Request(url, None, headers)
+
+		# 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
+
+		count = 0
+		retries = self.params.get('retries', 0)
+		while count <= retries:
+			# Establish connection
+			try:
+				if count == 0 and 'urlhandle' in info_dict:
+					data = info_dict['urlhandle']
+				data = urllib2.urlopen(request)
+				break
+			except (urllib2.HTTPError, ), err:
+				if (err.code < 500 or err.code >= 600) and err.code != 416:
+					# Unexpected HTTP error
+					raise
+				elif err.code == 416:
+					# Unable to resume (requested range not satisfiable)
+					try:
+						# Open the connection again without the range header
+						data = urllib2.urlopen(basic_request)
+						content_length = data.info()['Content-Length']
+					except (urllib2.HTTPError, ), 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 < long(content_length) < 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(filename)
+							self.try_rename(tmpfilename, filename)
+							return True
+						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.trouble(u'ERROR: giving up after %s retries' % retries)
+			return False
+
+		data_len = data.info().get('Content-length', None)
+		if data_len is not None:
+			data_len = long(data_len) + resume_len
+		data_len_str = self.format_bytes(data_len)
+		byte_counter = 0 + resume_len
+		block_size = 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:
+				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), err:
+					self.trouble(u'ERROR: unable to open for writing: %s' % str(err))
+					return False
+			try:
+				stream.write(data_block)
+			except (IOError, OSError), err:
+				self.trouble(u'\nERROR: unable to write data: %s' % str(err))
+				return False
+			block_size = self.best_block_size(after - before, len(data_block))
+
+			# Progress message
+			speed_str = self.calc_speed(start, time.time(), byte_counter - resume_len)
+			if data_len is None:
+				self.report_progress('Unknown %', data_len_str, speed_str, 'Unknown ETA')
+			else:
+				percent_str = self.calc_percent(byte_counter, data_len)
+				eta_str = self.calc_eta(start, time.time(), data_len - resume_len, byte_counter - resume_len)
+				self.report_progress(percent_str, data_len_str, speed_str, eta_str)
+
+			# Apply rate limit
+			self.slow_down(start, byte_counter - resume_len)
+
+		if stream is None:
+			self.trouble(u'\nERROR: Did not get any data blocks')
+			return False
+		stream.close()
+		self.report_finish()
+		if data_len is not None and byte_counter != data_len:
+			raise ContentTooShortError(byte_counter, long(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))
+
+		return True