nicovideo-dl: comment downloading patch

0001-Added-comment-downloading-feature.patch

From 753bfe3a88e9e363990db303cd7a57074db3e4c0 Mon Sep 17 00:00:00 2001
From: snipsnipsnip <snipsnipsnip@users.sourceforge.jp>
Date: Mon, 6 Feb 2012 13:09:53 +0900
Subject: [PATCH] Added comment downloading feature.

 * added -c, --get-comments option
 * added -x, --comments-in-xml option
 * added --output-comments option
 * added download_comments() function to be called just before video retrieving
 * added some imports and constants for the feature
---
 nicovideo-dl.py |  106 ++++++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 105 insertions(+), 1 deletions(-)

diff --git a/nicovideo-dl.py b/nicovideo-dl.py
index ffd6893..c0960b5 100644
--- a/nicovideo-dl.py
+++ b/nicovideo-dl.py
@@ -42,6 +42,8 @@ import sys
 import time
 import urllib2
 import cgi
+import codecs
+import xml.parsers.expat
 
 # Global constants
 const_version = '2011.02.08'
@@ -61,6 +63,9 @@ const_video_url_info_str = 'http://www.nicovideo.jp/api/getflv?v=%s&as3=1'
 const_video_title_re = re.compile(r'<title>(.*)</title>', re.M | re.I)
 const_video_type_re = re.compile(r'^http://.*\.nicovideo\.jp/smile\?(.*?)=.*')
 
+const_comment_getthreadkey_url = 'http://flapi.nicovideo.jp/api/getthreadkey?thread=%s'
+const_comment_request_str = '<thread thread="%s" version="20061206" res_from="-1000" user_id="%s"%s/>'
+
 # Print error message, followed by standard advice information, and then exit
 def error_advice_exit(error_text):
 	sys.stderr.write('Error: %s.\n' % error_text)
@@ -215,6 +220,99 @@ def calc_speed(start, now, bytes):
 		return 'N/A b'
 	return format_bytes(float(bytes) / dif)
 
+# Download comments and save to the file
+def download_comments(cmdl_opts, video_url, video_filename, video_url_id, video_info_data):
+	def extract_param(param, key):
+		if param.has_key(key):
+			return param[key][0]
+		else:
+			error_advice_exit('cannot extract %s parameter' % key)
+	
+	def post(name, url, post_data=None):
+		data, res = download_step(True, 'Retrieving %s' % name, 'unable to get %s' % name, url, post_data=post_data)
+		return data
+	
+	def get_thread_info():
+		url = const_comment_getthreadkey_url % video_url_id
+		data = post('thread key', url)
+		info = cgi.parse_qs(data)
+		return extract_param(info, "threadkey"), extract_param(info, "force_184")
+	
+	def calc_request(thread_id, user_id):
+		options = ''
+		
+		if video_url_id.isdigit():
+			options = ' threadkey="%s" force_184="%s"' % get_thread_info()
+		
+		return const_comment_request_str % (thread_id, user_id, options)
+	
+	def parse_comments(comments_xml):
+		comments = []
+
+		def start(name, attrs):
+			if name == 'chat':
+				comments.append([int(attrs['vpos']), None])
+
+		def text(data):
+		    comments[-1][1] = data
+		
+		parser = xml.parsers.expat.ParserCreate()
+		parser.StartElementHandler = start
+		parser.CharacterDataHandler = text
+		parser.Parse(comments_xml)
+		
+		comments.sort()
+		
+		return comments
+	
+	def write_comments(comments, f):
+		f.write(u'comments for %s (%s) on %s\n' % (video_url, video_filename, time.asctime()))
+		
+		if all(vpos < 600000 for vpos, comment in comments):
+			timestamp = '%02d:%02d '
+		else:
+			timestamp = '%03d:%02d '
+		
+		for vpos, comment in comments:
+			f.write(timestamp % divmod(vpos / 100, 60))
+			f.write(comment)
+			f.write('\n')
+	
+	def save_comments(comments):
+		outfile = cmdl_opts.comments_outfile
+		if outfile is None:
+			if cmdl_opts.comments_in_xml:
+				outfile = '%s.xml' % video_filename
+			else:
+				outfile = '%s.txt' % video_filename
+
+		try:
+			f = codecs.open(outfile, 'w', 'utf-8')
+		except (IOError, OSError):
+			sys.exit('Error: unable to open "%s" for writing.' % outfile)
+		
+		if cmdl_opts.comments_in_xml:
+			f.write(comments)
+		else:
+			write_comments(parse_comments(comments), f)
+		
+		f.close()
+		
+		cond_print('Comments saved to %s\n' % outfile)
+
+	if not cmdl_opts.get_comments:
+		return
+	
+	info = cgi.parse_qs(video_info_data)
+	thread_id = extract_param(info, "thread_id")
+	user_id = extract_param(info, "user_id")
+	msg_url = extract_param(info, "ms")
+	
+	request_xml = calc_request(thread_id, user_id)
+	comments = post('comments', msg_url, post_data=request_xml)
+	
+	save_comments(comments)
+
 # Create the command line options parser and parse command line
 cmdl_usage = 'usage: %prog [options] video_url'
 cmdl_version = const_version
@@ -231,6 +329,9 @@ cmdl_parser.add_option('-l', '--literal', action='store_true', dest='use_literal
 cmdl_parser.add_option('-n', '--netrc', action='store_true', dest='use_netrc', help='use .netrc authentication data')
 cmdl_parser.add_option('-g', '--get-url', action='store_true', dest='get_url', help='print final video URL only')
 cmdl_parser.add_option('-2', '--title-too', action='store_true', dest='get_title', help='used with -g, print title too')
+cmdl_parser.add_option('-c', '--get-comments', action='store_true', dest='get_comments', help='download comments')
+cmdl_parser.add_option('-x', '--comments-in-xml', action='store_true', dest='comments_in_xml', help='save comments in xml format')
+cmdl_parser.add_option('--output-comments', dest='comments_outfile', metavar='FILE', help='output comments file name')
 (cmdl_opts, cmdl_args) = cmdl_parser.parse_args()
 
 # Set socket timeout
@@ -370,7 +471,10 @@ for video_url_cmdl in cmdl_args:
 	# Check name
 	if not video_filename.lower().endswith(video_extension):
 		sys.stderr.write('Warning: video file name does not end in %s\n' % video_extension)
-	
+
+	# Download comments
+	download_comments(cmdl_opts, video_url, video_filename, video_url_id, video_info_data)
+
 	# Retrieve video data
 	try:
 		cond_print('Requesting video file... ')
-- 
1.7.4.msysgit.0

nicovideo-dl.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# Copyright (c) 2009 Keiichiro Nagano
# Copyright (c) 2009 Kimura Youichi
# Copyright (c) 2006-2008 Ricardo Garcia Gonzalez
# Copyright (c) 2008 Ying-Chun Liu (PaulLiu)
#
# Permission is hereby granted, free of charge, to any person obtaining a
# copy of this software and associated documentation files (the "Software"),
# to deal in the Software without restriction, including without limitation
# the rights to use, copy, modify, merge, publish, distribute, sublicense,
# and/or sell copies of the Software, and to permit persons to whom the
# Software is furnished to do so, subject to the following conditions:
# 
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
# 
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
# OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
# ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
# OTHER DEALINGS IN THE SOFTWARE.
# 
# Except as contained in this notice, the name(s) of the above copyright
# holders shall not be used in advertising or otherwise to promote the
# sale, use or other dealings in this Software without prior written
# authorization.
#
import getpass
import httplib
import math
import netrc
import optparse
import os
import re
import socket
import string
import sys
import time
import urllib2
import cgi
import codecs
import xml.parsers.expat

# Global constants
const_version = '2011.02.08'
const_project_url = 'http://sourceforge.jp/projects/nicovideo-dl'

const_1k = 1024
const_initial_block_size = 10 * const_1k
const_epsilon = 0.0001
const_timeout = 120

const_video_url_str = 'http://www.nicovideo.jp/watch/%s'
const_video_url_re = re.compile(r'^((?:http://)?(?:\w+\.)?(?:nicovideo\.jp/(?:v/|(?:watch(?:\.php)?))?/)?(\w+))')
const_login_url_str = 'https://secure.nicovideo.jp/secure/login?site=niconico'
const_login_post_str = 'current_form=login&mail=%s&password=%s&login_submit=Log+In'
const_url_url_param_re = re.compile(r"url[=](http[^&]*)")
const_video_url_info_str = 'http://www.nicovideo.jp/api/getflv?v=%s&as3=1'
const_video_title_re = re.compile(r'<title>(.*)</title>', re.M | re.I)
const_video_type_re = re.compile(r'^http://.*\.nicovideo\.jp/smile\?(.*?)=.*')

const_comment_getthreadkey_url = 'http://flapi.nicovideo.jp/api/getthreadkey?thread=%s'
const_comment_request_str = '<thread thread="%s" version="20061206" res_from="-1000" user_id="%s"%s/>'

# Print error message, followed by standard advice information, and then exit
def error_advice_exit(error_text):
	sys.stderr.write('Error: %s.\n' % error_text)
	sys.stderr.write('Try again several times. It may be a temporary problem.\n')
	sys.stderr.write('Other typical problems:\n\n')
	sys.stderr.write('* Video no longer exists.\n')
	sys.stderr.write('* You provided the account data, but it is not valid.\n')
	sys.stderr.write('* The connection was cut suddenly for some reason.\n')
	sys.stderr.write('* Your account is free and perhaps only usable at 02:00 to 19:00 (+0900).\n')
	sys.stderr.write('* Niconico changed their system, and the program no longer works.\n')
	sys.stderr.write('\nTry to confirm you are able to view the video using a web browser.\n')
	sys.stderr.write('Use the same video URL and account information, if needed, with this program.\n')
	sys.stderr.write('When using a proxy, make sure http_proxy has http://host:port format.\n')
	sys.stderr.write('Try again several times and contact me if the problem persists.\n')
	sys.exit('\n')

# Wrapper to create custom requests with typical headers
def request_create(url, extra_headers, post_data=None):
	retval = urllib2.Request(url)
	if post_data is not None:
		retval.add_data(post_data)
	retval.add_header('User-Agent', 'nicovideo-dl/%s (%s)' % (const_version, const_project_url))
	retval.add_header('Accept-Charset', 'ISO-8859-1,utf-8;q=0.7,*;q=0.7')
	retval.add_header('Accept', 'text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5')
	retval.add_header('Accept-Language', 'en-us,en;q=0.5')
	if extra_headers is not None:
		for header in extra_headers:
			retval.add_header(header[0], header[1])
	return retval

# Perform a request, process headers and return response
def perform_request(url, headers=None, data=None):
	request = request_create(url, headers, data)
	response = urllib2.urlopen(request)
	return response

# Conditional print
def cond_print(str):
	global cmdl_opts
	if not (cmdl_opts.quiet or cmdl_opts.get_url):
		sys.stdout.write(str)
		sys.stdout.flush()

# Title string normalization
def title_string_norm(title):
	title_s = unicode(title.decode('utf-8', 'ignore'))
	for title_p in [u'‐ニコニコ動画(SP1)',
			u'‐ニコニコ動画(夏)',
			u'‐ニコニコ動画(秋)', # as of Oct 2008
			u'‐ニコニコ動画(冬)', # as of 5 Dec 2008
			u'‐ニコニコ動画(ββ)', # as of 12 Dec 2008
			u'‐ニコニコ動画(9)', # as of 29 Oct 2009
			u'‐ ニコニコ動画(原宿)', # as of 29 Oct 2010
			]:
		if (title_s.endswith(title_p)):
			title_s = title_s[:title_s.rfind(title_p)]
			break
	title_s = title_s.replace(os.sep, u'%')
	title_s = u'_'.join(title_s.split())
	title_s = title_s.encode('utf-8','ignore')
	return title_s

# Title string minimal transformation
def title_string_touch(title):
	return title.replace(os.sep, '%')

# Generic download step
def download_step(return_data_flag, step_title, step_error, url, post_data=None):
	try:
		cond_print('%s... ' % step_title)
		response = perform_request(url, data=post_data)
		data = response.read()
		cond_print('done.\n')
		if return_data_flag:
			return data, response
		return None

	except (urllib2.URLError, ValueError, httplib.HTTPException, TypeError, socket.error):
		cond_print('failed.\n')
		error_advice_exit(step_error)

	except KeyboardInterrupt:
		sys.exit('\n')

# Generic extract step
def extract_step(step_title, step_error, regexp, data):
	try:
		cond_print('%s... ' % step_title)
		match = regexp.search(data)
		
		if match is None:
			cond_print('failed.\n')
			error_advice_exit(step_error)
		
		extracted_data = match.group(1)
		cond_print('done.\n')
		return extracted_data
	
	except KeyboardInterrupt:
		sys.exit('\n')

# Calculate new block size based on previous block size
def new_block_size(before, after, bytes):
	new_min = max(bytes / 2.0, 1.0)
	new_max = max(bytes * 2.0, 1.0)
	dif = after - before
	if dif < const_epsilon:
		return int(new_max)
	rate = bytes / dif
	if rate > new_max:
		return int(new_max)
	if rate < new_min:
		return int(new_min)
	return int(rate)

# Get optimum 1k exponent to represent a number of bytes
def optimum_k_exp(num_bytes):
	global const_1k
	if num_bytes == 0:
		return 0
	return long(math.log(num_bytes, const_1k))

# Get optimum representation of number of bytes
def format_bytes(num_bytes):
	global const_1k
	try:
		exp = optimum_k_exp(num_bytes)
		suffix = 'bkMGTPEZY'[exp]
		if exp == 0:
			return '%s%s' % (num_bytes, suffix)
		converted = float(num_bytes) / float(const_1k**exp)
		return '%.2f%s' % (converted, suffix)
	except IndexError:
		sys.exit('Error: internal error formatting number of bytes.')

# Calculate ETA and return it in string format as MM:SS
def calc_eta(start, now, total, current):
	dif = now - start
	if current == 0 or dif < const_epsilon:
		return '--:--'
	rate = float(current) / dif
	eta = long((total - current) / rate)
	(eta_mins, eta_secs) = divmod(eta, 60)
	if eta_mins > 99:
		return '--:--'
	return '%02d:%02d' % (eta_mins, eta_secs)

# Calculate speed and return it in string format
def calc_speed(start, now, bytes):
	dif = now - start
	if bytes == 0 or dif < const_epsilon:
		return 'N/A b'
	return format_bytes(float(bytes) / dif)

# Download comments and save to the file
def download_comments(cmdl_opts, video_url, video_filename, video_url_id, video_info_data):
	def extract_param(param, key):
		if param.has_key(key):
			return param[key][0]
		else:
			error_advice_exit('cannot extract %s parameter' % key)
	
	def post(name, url, post_data=None):
		data, res = download_step(True, 'Retrieving %s' % name, 'unable to get %s' % name, url, post_data=post_data)
		return data
	
	def get_thread_info():
		url = const_comment_getthreadkey_url % video_url_id
		data = post('thread key', url)
		info = cgi.parse_qs(data)
		return extract_param(info, "threadkey"), extract_param(info, "force_184")
	
	def calc_request(thread_id, user_id):
		options = ''
		
		if video_url_id.isdigit():
			options = ' threadkey="%s" force_184="%s"' % get_thread_info()
		
		return const_comment_request_str % (thread_id, user_id, options)
	
	def parse_comments(comments_xml):
		comments = []

		def start(name, attrs):
			if name == 'chat':
				comments.append([int(attrs['vpos']), None])

		def text(data):
		    comments[-1][1] = data
		
		parser = xml.parsers.expat.ParserCreate()
		parser.StartElementHandler = start
		parser.CharacterDataHandler = text
		parser.Parse(comments_xml)
		
		comments.sort()
		
		return comments
	
	def write_comments(comments, f):
		f.write(u'comments for %s (%s) on %s\n' % (video_url, video_filename, time.asctime()))
		
		if all(vpos < 600000 for vpos, comment in comments):
			timestamp = '%02d:%02d '
		else:
			timestamp = '%03d:%02d '
		
		for vpos, comment in comments:
			f.write(timestamp % divmod(vpos / 100, 60))
			f.write(comment)
			f.write('\n')
	
	def save_comments(comments):
		outfile = cmdl_opts.comments_outfile
		if outfile is None:
			if cmdl_opts.comments_in_xml:
				outfile = '%s.xml' % video_filename
			else:
				outfile = '%s.txt' % video_filename

		try:
			f = codecs.open(outfile, 'w', 'utf-8')
		except (IOError, OSError):
			sys.exit('Error: unable to open "%s" for writing.' % outfile)
		
		if cmdl_opts.comments_in_xml:
			f.write(comments)
		else:
			write_comments(parse_comments(comments), f)
		
		f.close()
		
		cond_print('Comments saved to %s\n' % outfile)

	if not cmdl_opts.get_comments:
		return
	
	info = cgi.parse_qs(video_info_data)
	thread_id = extract_param(info, "thread_id")
	user_id = extract_param(info, "user_id")
	msg_url = extract_param(info, "ms")
	
	request_xml = calc_request(thread_id, user_id)
	comments = post('comments', msg_url, post_data=request_xml)
	
	save_comments(comments)

# Create the command line options parser and parse command line
cmdl_usage = 'usage: %prog [options] video_url'
cmdl_version = const_version
cmdl_parser = optparse.OptionParser(usage=cmdl_usage, version=cmdl_version, conflict_handler='resolve')
cmdl_parser.add_option('-h', '--help', action='help', help='print this help text and exit')
cmdl_parser.add_option('-v', '--version', action='version', help='print program version and exit')
cmdl_parser.add_option('-u', '--username', dest='username', metavar='USERNAME', help='account username')
cmdl_parser.add_option('-p', '--password', dest='password', metavar='PASSWORD', help='account password')
cmdl_parser.add_option('-o', '--output', dest='outfile', metavar='FILE', help='output video file name')
cmdl_parser.add_option('-q', '--quiet', action='store_true', dest='quiet', help='activates quiet mode')
cmdl_parser.add_option('-s', '--simulate', action='store_true', dest='simulate', help='do not download video')
cmdl_parser.add_option('-t', '--title', action='store_true', dest='use_title', help='use title in file name')
cmdl_parser.add_option('-l', '--literal', action='store_true', dest='use_literal', help='use literal title in file name')
cmdl_parser.add_option('-n', '--netrc', action='store_true', dest='use_netrc', help='use .netrc authentication data')
cmdl_parser.add_option('-g', '--get-url', action='store_true', dest='get_url', help='print final video URL only')
cmdl_parser.add_option('-2', '--title-too', action='store_true', dest='get_title', help='used with -g, print title too')
cmdl_parser.add_option('-c', '--get-comments', action='store_true', dest='get_comments', help='download comments')
cmdl_parser.add_option('-x', '--comments-in-xml', action='store_true', dest='comments_in_xml', help='save comments in xml format')
cmdl_parser.add_option('--output-comments', dest='comments_outfile', metavar='FILE', help='output comments file name')
(cmdl_opts, cmdl_args) = cmdl_parser.parse_args()

# Set socket timeout
socket.setdefaulttimeout(const_timeout)

# Get video URL
if len(cmdl_args) == 0:
	cmdl_parser.print_help()
	sys.exit('\n')

# Check conflicting options
if cmdl_opts.outfile is not None and (cmdl_opts.simulate or cmdl_opts.get_url):
	sys.stderr.write('Warning: video file name given but will not be used.\n')

if cmdl_opts.outfile is not None and (cmdl_opts.use_title or cmdl_opts.use_literal):
	sys.exit('Error: using the video title conflicts with using a given file name.')

if cmdl_opts.use_title and cmdl_opts.use_literal:
	sys.exit('Error: cannot use title and literal title at the same time.')

if cmdl_opts.quiet and cmdl_opts.get_url:
	sys.exit('Error: cannot be quiet and print final URL at the same time.')

# Incorrect option formatting
if cmdl_opts.username is None and cmdl_opts.password is not None:
	sys.exit('Error: password give but username is missing.')

if cmdl_opts.use_netrc and (cmdl_opts.username is not None or cmdl_opts.password is not None):
	sys.exit('Error: cannot use netrc and username/password at the same time.')

if cmdl_opts.get_url is None and cmdl_opts.get_title is not None:
	sys.exit('Error: getting title requires getting URL.')

# Get account information if any
account_username = None
account_password = None

if cmdl_opts.use_netrc:
	try:
		info = netrc.netrc().authenticators('nicovideo')
		if info is None:
			sys.exit('Error: no authenticators for machine nicovideo.')
		netrc_username = info[0]
		netrc_password = info[2]
	except IOError:
		sys.exit('Error: unable to read .netrc file.')
	except netrc.NetrcParseError:
		sys.exit('Error: unable to parse .netrc file.')

if cmdl_opts.password is not None:
	account_username = cmdl_opts.username
	account_password = cmdl_opts.password
else:
	if cmdl_opts.username is not None and cmdl_opts.use_netrc:
		if cmdl_opts.username != netrc_username:
			sys.exit('Error: conflicting username from .netrc and command line options.')
		account_username = cmdl_opts.username
		account_password = netrc_password
	elif cmdl_opts.username is not None:
		account_username = cmdl_opts.username
		account_password = getpass.getpass('Type Niconico password and press return: ')
	elif cmdl_opts.use_netrc:
		if len(netrc_username) == 0:
			sys.exit('Error: empty username in .netrc file.')
		account_username = netrc_username
		account_password = netrc_password
	elif account_username is None:
		account_username = raw_input("Type Niconico E-mail account: ")
		account_password = getpass.getpass('Type Niconico password and press return: ')

# Install cookie and proxy handlers
urllib2.install_opener(urllib2.build_opener(urllib2.ProxyHandler()))
urllib2.install_opener(urllib2.build_opener(urllib2.HTTPCookieProcessor()))

# Log in
if account_username is not None:
	url = const_login_url_str
	post = const_login_post_str % (account_username, account_password)
	download_step(False, 'Logging in', 'unable to log in', url, post)

for video_url_cmdl in cmdl_args:
	# Verify video URL format and convert to "standard" format
	video_url_mo = const_video_url_re.match(video_url_cmdl)
	if video_url_mo is None:
		sys.exit('Error: URL does not seem to be a niconico video URL. If it is, report a bug.')
	video_url_id = video_url_mo.group(2)
	video_url = const_video_url_str % video_url_id
	
	video_extension = '.flv'
	
	# Retrieve video webpage
	video_webpage, response = download_step(True, 'Retrieving video webpage', 'unable to retrieve video webpage', video_url)

	# Reconvert URL if redirected
	if response.geturl() != video_url:
		video_url_id = const_video_url_re.match(response.geturl()).group(2)
		video_url = const_video_url_str % video_url_id
	
	# Extract video title if needed
	if cmdl_opts.use_title or cmdl_opts.use_literal or cmdl_opts.get_title:
		video_title = extract_step('Extracting video title', 'unable to extract video title', const_video_title_re, video_webpage)
	
	# Extract needed video URL parameters
	video_url_info = const_video_url_info_str % video_url_id
	video_info_data, response = download_step(True, 'Retrieving info data', 'unable to retrieve video webpage', video_url_info)
	cond_print('Extracting URL "url" parameter... ')
	video_url_url_param = cgi.parse_qs(video_info_data)
	if (video_url_url_param.has_key("url")):
		video_url_url_param=video_url_url_param["url"][0]
	else:
		error_advice_exit('cannot extract url parameter')
	cond_print('done.\n')
	video_url_real = (video_url_url_param)
	
	# Extract video type and modify video_extension
	video_type_mo = const_video_type_re.match(video_url_real)
	if (video_type_mo):
		if video_type_mo.group(1) == "s":
			video_extension = ".swf"
		elif video_type_mo.group(1) == "m":
			video_extension = ".mp4"
	
	# Get output file name 
	if cmdl_opts.outfile is None:
		video_filename = '%s%s' % (video_url_id, video_extension)
	else:
		video_filename = cmdl_opts.outfile
	
	# Rebuild filename if needed
	if cmdl_opts.use_title or cmdl_opts.use_literal:
		if cmdl_opts.use_title:
			prefix = title_string_norm(video_title)
		else:
			prefix = title_string_touch(video_title)
		video_filename = '%s-%s%s' % (prefix, video_url_id, video_extension)
	
	# Check name
	if not video_filename.lower().endswith(video_extension):
		sys.stderr.write('Warning: video file name does not end in %s\n' % video_extension)

	# Download comments
	download_comments(cmdl_opts, video_url, video_filename, video_url_id, video_info_data)

	# Retrieve video data
	try:
		cond_print('Requesting video file... ')
		video_data = perform_request(video_url_real)
		cond_print('done.\n')
		cond_print('Video data found at %s\n' % video_data.geturl())
		
		if cmdl_opts.get_title:
			print video_title
		
		if cmdl_opts.get_url:
			print video_data.geturl()
		
		if cmdl_opts.simulate or cmdl_opts.get_url:
			continue
		
		try:
			video_file = open(video_filename, 'wb')
		except (IOError, OSError):
			sys.exit('Error: unable to open "%s" for writing.' % video_filename)
		try:
			video_len = long(video_data.info()['Content-length'])
			video_len_str = format_bytes(video_len)
		except KeyError:
			video_len = None
			video_len_str = 'N/A'
		
		byte_counter = 0
		block_size = const_initial_block_size
		start_time = time.time()
		while True:
			if video_len is not None:
				percent = float(byte_counter) / float(video_len) * 100.0
				percent_str = '%.1f' % percent
				eta_str = calc_eta(start_time, time.time(), video_len, byte_counter)
			else:
				percent_str = '---.-'
				eta_str = '--:--'
			counter = format_bytes(byte_counter)
			speed_str = calc_speed(start_time, time.time(), byte_counter)
			cond_print('\rRetrieving video data: %5s%% (%8s of %s) at %8s/s ETA %s ' % (percent_str, counter, video_len_str, speed_str, eta_str))
	
			before = time.time()
			video_block = video_data.read(block_size)
			after = time.time()
			dl_bytes = len(video_block)
			if dl_bytes == 0:
				break
			byte_counter += dl_bytes
			video_file.write(video_block)
			block_size = new_block_size(before, after, dl_bytes)
		
		if video_len is not None and byte_counter != video_len:
			error_advice_exit('server did not send the expected amount of data')
		
		video_file.close()
		cond_print('done.\n')
		cond_print('Video data saved to %s\n' % video_filename)
	
	except (urllib2.URLError, ValueError, httplib.HTTPException, TypeError, socket.error):
		cond_print('failed.\n')
		error_advice_exit('unable to download video data')
	
	except KeyboardInterrupt:
		sys.exit('\n')
# Finish
sys.exit()