Create initial preview version of the new youtube-dl

.hgignore

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+youtube-dl-old

youtube-dl

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+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+# Author: Ricardo Garcia Gonzalez
+# License: Public domain code
+import htmlentitydefs
+import httplib
+import math
+import netrc
+import os
+import os.path
+import re
+import socket
+import string
+import sys
+import time
+import urllib
+import urllib2
+
+std_headers = {	
+	'User-Agent': 'UserAgent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9) Gecko/2008052906 Firefox/3.0',
+	'Accept-Charset': 'ISO-8859-1,utf-8;q=0.7,*;q=0.7',
+	'Accept': 'text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5',
+	'Accept-Language': 'en-us,en;q=0.5',
+}
+
+simple_title_chars = string.ascii_letters.decode('ascii') + string.digits.decode('ascii')
+
+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 it's able to handle it. The InfoExtractor returns
+	all the information to the FileDownloader and the latter downloads the
+	file or does whatever it's instructed to do.
+
+	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 get_params()
+	method 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.
+	format:		Video format code.
+	outtmpl:	Template for output names.
+	"""
+
+	_params = None
+	_ies = []
+
+	def __init__(self, params):
+		self._ies = []
+		self.set_params(params)
+	
+	@staticmethod
+	def pmkdir(filename):
+		"""Create directory components in filename. Similar to Unix "mkdir -p"."""
+		components = filename.split(os.sep)
+		aggregate = [os.sep.join(components[0:x]) for x in xrange(1, len(components))]
+		for dir in aggregate:
+			if not os.path.exists(dir):
+				os.mkdir(dir)
+	
+	@staticmethod
+	def format_bytes(bytes):
+		if bytes is None:
+			return 'N/A'
+		if bytes == 0:
+			exponent = 0
+		else:
+			exponent = long(math.log(float(bytes), 1024.0))
+		suffix = 'bkMGTPEZY'[exponent]
+		if exponent == 0:
+			return '%s%s' % (bytes, suffix)
+		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 '%9s' % 'N/A 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 int(new_max)
+		rate = bytes / elapsed_time
+		if rate > new_max:
+			return int(new_max)
+		if rate < new_min:
+			return int(new_min)
+		return int(rate)
+
+	def set_params(self, params):
+		"""Sets parameters."""
+		if type(params) != dict:
+			raise ValueError('params: dictionary expected')
+		self._params = params
+	
+	def get_params(self):
+		"""Get parameters."""
+		return self._params
+
+	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 download(self, url_list):
+		"""Download a given list of URLs."""
+		for url in url_list:
+			suitable_found = False
+			for ie in self._ies:
+				if not ie.suitable(url):
+					continue
+				# Suitable InfoExtractor found
+				suitable_found = True
+				for result in ie.extract(url):
+					if result is None:
+						continue
+					try:
+						filename = self._params['outtmpl'] % result
+					except (KeyError), err:
+						sys.stderr.write('ERROR: invalid output template: %s\n' % str(err))
+						continue
+					try:
+						self.pmkdir(filename)
+					except (OSError, IOError), err:
+						sys.stderr.write('ERROR: unable to create directories: %s\n' % str(err))
+						continue
+					try:
+						outstream = open(filename, 'wb')
+					except (OSError, IOError), err:
+						sys.stderr.write('ERROR: unable to open for writing: %s\n' % str(err))
+						continue
+					try:
+						self._do_download(outstream, result['url'])
+						outstream.close()
+					except (OSError, IOError), err:
+						sys.stderr.write('ERROR: unable to write video data: %s\n' % str(err))
+						continue
+					except (urllib2.URLError, httplib.HTTPException, socket.error), err:
+						sys.stderr.write('ERROR: unable to download video data: %s\n' % str(err))
+						continue
+				break
+			if not suitable_found:
+				sys.stderr.write('ERROR: no suitable InfoExtractor: %s\n' % url)
+	
+	def _do_download(self, stream, url):
+		request = urllib2.Request(url, None, std_headers)
+		data = urllib2.urlopen(request)
+		data_len = data.info().get('Content-length', None)
+		data_len_str = self.format_bytes(data_len)
+		byte_counter = 0
+		block_size = 1024
+		start = time.time()
+		while True:
+			percent_str = self.calc_percent(byte_counter, data_len)
+			eta_str = self.calc_eta(start, time.time(), data_len, byte_counter)
+			speed_str = self.calc_speed(start, time.time(), byte_counter)
+
+			if not self._params.get('quiet', False):
+				sys.stdout.write('\r[download] %s of %s at %s ETA %s' %
+						(percent_str, data_len_str, speed_str, eta_str))
+				sys.stdout.flush()
+
+			before = time.time()
+			data_block = data.read(block_size)
+			after = time.time()
+			data_block_len = len(data_block)
+			if data_block_len == 0:
+				break
+			byte_counter += data_block_len
+			stream.write(data_block)
+			block_size = self.best_block_size(after - before, data_block_len)
+
+		if not self._params.get('quiet', False):
+			print
+
+		if data_len is not None and str(byte_counter) != data_len:
+			raise ValueError('Content too short: %s/%s bytes' % (byte_counter, data_len))
+
+class InfoExtractor(object):
+	"""Information Extractor class.
+
+	Information extractors are the classes that, given a URL, extract
+	information from the video (or videos) the URL refers to. This
+	information includes the real video URL, the video title and simplified
+	title, author and others. It is returned in a list of dictionaries when
+	calling its extract() method. It is a list because a URL can refer to
+	more than one video (think of playlists). The dictionaries must include
+	the following fields:
+
+	id:		Video identifier.
+	url:		Final video URL.
+	uploader:	Nickname of the video uploader.
+	title:		Literal title.
+	stitle:		Simplified title.
+	ext:		Video filename extension.
+
+	Subclasses of this one should re-define the _real_initialize() and
+	_real_extract() methods, as well as the suitable() static method.
+	Probably, they should also be instantiated and added to the main
+	downloader.
+	"""
+
+	_ready = False
+	_downloader = None
+
+	def __init__(self, downloader=None):
+		"""Constructor. Receives an optional downloader."""
+		self._ready = False
+		self.set_downloader(downloader)
+
+	@staticmethod
+	def suitable(url):
+		"""Receives a URL and returns True if suitable for this IE."""
+		return True
+
+	def initialize(self):
+		"""Initializes an instance (login, etc)."""
+		if not self._ready:
+			self._real_initialize()
+			self._ready = True
+
+	def extract(self, url):
+		"""Extracts URL information and returns it in list of dicts."""
+		self.initialize()
+		return self._real_extract(url)
+
+	def set_downloader(self, downloader):
+		"""Sets the downloader for this IE."""
+		self._downloader = downloader
+	
+	def to_stdout(self, message):
+		if self._downloader is None or not self._downloader.get_params().get('quiet', False):
+			print message
+	
+	def to_stderr(self, message):
+		sys.stderr.write('%s\n' % message)
+
+	def _real_initialize(self):
+		"""Real initialization process. Redefine in subclasses."""
+		pass
+
+	def _real_extract(self, url):
+		"""Real extraction process. Redefine in subclasses."""
+		pass
+
+class YoutubeIE(InfoExtractor):
+	"""Information extractor for youtube.com."""
+
+	_LOGIN_URL = 'http://www.youtube.com/login?next=/'
+	_AGE_URL = 'http://www.youtube.com/verify_age?next_url=/'
+	_NETRC_MACHINE = 'youtube'
+
+	def _real_initialize(self):
+		if self._downloader is None:
+			return
+
+		username = None
+		password = None
+		downloader_params = self._downloader.get_params()
+
+		# Attempt to use provided username and password or .netrc data
+		if downloader_params.get('username', None) is not None:
+			username = downloader_params['username']
+			password = downloader_params['password']
+		elif downloader_params.get('usenetrc', False):
+			try:
+				info = netrc.netrc().authenticators(self._NETRC_MACHINE)
+				if info is not None:
+					username = info[0]
+					password = info[2]
+				else:
+					raise netrc.NetrcParseError('No authenticators for %s' % self._NETRC_MACHINE)
+			except (IOError, netrc.NetrcParseError), err:
+				self.to_stderr('WARNING: parsing .netrc: %s' % str(err))
+				return
+
+		if username is None:
+			return
+
+		# Log in
+		login_form = {	'current_form': 'loginForm',
+				'next':		'/',
+				'action_login':	'Log In',
+				'username':	username,
+				'password':	password,	}
+		request = urllib2.Request(self._LOGIN_URL, urllib.urlencode(login_form), std_headers)
+		try:
+			self.to_stdout('[youtube] Logging in')
+			login_results = urllib2.urlopen(request).read()
+			if re.search(r'(?i)<form[^>]* name="loginForm"', login_results) is not None:
+				self.to_stderr('WARNING: Unable to log in: bad username or password')
+				return
+		except (urllib2.URLError, httplib.HTTPException, socket.error), err:
+			self.to_stderr('WARNING: Unable to log in: %s' % str(err))
+			return
+	
+		# Confirm age
+		age_form = {	'next_url':		'/',
+				'action_confirm':	'Confirm',	}
+		request = urllib2.Request(self._AGE_URL, urllib.urlencode(age_form), std_headers)
+		try:
+			self.to_stdout('[youtube] Confirming age')
+			age_results = urllib2.urlopen(request).read()
+		except (urllib2.URLError, httplib.HTTPException, socket.error), err:
+			sys.exit('ERROR: Unable to confirm age: %s' % str(err))
+
+	def _real_extract(self, url):
+		# Extract video id from URL
+		mobj = re.match(r'^((?:http://)?(?:\w+\.)?youtube\.com/(?:(?:v/)|(?:(?:watch(?:\.php)?)?\?(?:.+&)?v=)))?([0-9A-Za-z_-]+)(?(1).+)?$', url)
+		if mobj is None:
+			self.to_stderr('ERROR: Invalid URL: %s' % url)
+			return [None]
+		video_id = mobj.group(2)
+
+		# Downloader parameters
+		format_param = None
+		if self._downloader is not None:
+			params = self._downloader.get_params()
+			format_param = params.get('format', None)
+
+		# Extension
+		video_extension = {18: 'mp4'}.get(format_param, 'flv')
+
+		# Normalize URL, including format
+		normalized_url = 'http://www.youtube.com/watch?v=%s' % video_id
+		if format_param is not None:
+			normalized_url = '%s&fmt=%s' % (normalized_url, format_param)
+		request = urllib2.Request(normalized_url, None, std_headers)
+		try:
+			self.to_stdout('[youtube] %s: Downloading video webpage' % video_id)
+			video_webpage = urllib2.urlopen(request).read()
+		except (urllib2.URLError, httplib.HTTPException, socket.error), err:
+			sys.exit('ERROR: Unable to download video: %s' % str(err))
+		self.to_stdout('[youtube] %s: Extracting video information' % video_id)
+		
+		# "t" param
+		mobj = re.search(r', "t": "([^"]+)"', video_webpage)
+		if mobj is None:
+			self.to_stderr('ERROR: Unable to extract "t" parameter')
+			return [None]
+		video_real_url = 'http://www.youtube.com/get_video?video_id=%s&t=%s' % (video_id, mobj.group(1))
+		if format_param is not None:
+			video_real_url = '%s&fmt=%s' % (video_real_url, format_param)
+
+		# uploader
+		mobj = re.search(r'More From: ([^<]*)<', video_webpage)
+		if mobj is None:
+			self.to_stderr('ERROR: Unable to extract uploader nickname')
+			return [None]
+		video_uploader = mobj.group(1)
+
+		# title
+		mobj = re.search(r'(?im)<title>YouTube - ([^<]*)</title>', video_webpage)
+		if mobj is None:
+			self.to_stderr('ERROR: Unable to extract video title')
+			return [None]
+		video_title = mobj.group(1).decode('utf-8')
+		video_title = re.sub(u'&(.+?);', lambda x: unichr(htmlentitydefs.name2codepoint[x.group(1)]), video_title)
+
+		# simplified title
+		simple_title = re.sub(u'([^%s]+)' % simple_title_chars, u'_', video_title)
+		simple_title = simple_title.strip(u'_')
+
+		# Return information
+		return [{	'id':		video_id,
+				'url':		video_real_url,
+				'uploader':	video_uploader,
+				'title':	video_title,
+				'stitle':	simple_title,
+				'ext':		video_extension,
+				}]
+
+if __name__ == '__main__':
+	try:
+		# General configuration
+		urllib2.install_opener(urllib2.build_opener(urllib2.ProxyHandler()))
+		urllib2.install_opener(urllib2.build_opener(urllib2.HTTPCookieProcessor()))
+
+		# Information extractors
+		youtube_ie = YoutubeIE()
+
+		# File downloader
+		fd = FileDownloader({	'usenetrc': False,
+					'username': None,
+					'password': None,
+					'quiet': False,
+					'format': None,
+					'outtmpl': '%(id)s.%(ext)s'
+					})
+		fd.add_info_extractor(youtube_ie)
+		fd.download([	'http://www.youtube.com/watch?v=t7qdwI7TVe8',
+				'http://www.youtube.com/watch?v=IJyn3pRcy_Q',
+				'http://www.youtube.com/watch?v=DZRXe1wtC-M',	])
+
+	except KeyboardInterrupt:
+		sys.exit('\nERROR: Interrupted by user')