[appletrailers] Use centralized format selection
[youtube-dl] / youtube-dl
index b80d71f88579b22b2f8ae072ba2f8ca7aeeb8287..e3eb8774caa258ddbaa51323938fbd36c4fc170d 100755 (executable)
 #!/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': 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.1) Gecko/2008070208 Firefox/3.0.1',
-       '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 DownloadError(Exception):
-       """Download Error exception.
-       
-       This exception may be thrown by FileDownloader objects if they are not
-       configured to continue on errors. They will contain the appropriate
-       error message.
-       """
-       pass
-
-class SameFileError(Exception):
-       """Same File exception.
-
-       This exception will be thrown by FileDownloader objects if they detect
-       multiple files would have to be downloaded to the same file on disk.
-       """
-       pass
-
-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 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.
-       forceurl:       Force printing final URL.
-       forcetitle:     Force printing title.
-       simulate:       Do not download the video files.
-       format:         Video format code.
-       outtmpl:        Template for output names.
-       ignoreerrors:   Do not stop on download errors.
-       ratelimit:      Download speed limit, in bytes/sec.
-       """
-
-       _params = None
-       _ies = []
-
-       def __init__(self, params):
-               """Create a FileDownloader object with the given options."""
-               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))]
-               aggregate = ['%s%s' % (x, os.sep) for x in aggregate] # Finish names with separator
-               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]
-               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 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)
-
-       @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 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 to_stdout(self, message, skip_eol=False):
-               """Print message to stdout if not in quiet mode."""
-               if not self._params.get('quiet', False):
-                       print u'%s%s' % (message, [u'\n', u''][skip_eol]),
-                       sys.stdout.flush()
-       
-       def to_stderr(self, message):
-               """Print message to stderr."""
-               print >>sys.stderr, message
-       
-       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 it
-               doesn't raise, it returns an error code suitable to be returned
-               later as a program exit code to indicate error.
-               """
-               if message is not None:
-                       self.to_stderr(message)
-               if not self._params.get('ignoreerrors', False):
-                       raise DownloadError(message)
-               return 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 report_destination(self, filename):
-               """Report destination filename."""
-               self.to_stdout(u'[download] Destination: %s' % filename)
-       
-       def report_progress(self, percent_str, data_len_str, speed_str, eta_str):
-               """Report download progress."""
-               self.to_stdout(u'\r[download] %s of %s at %s ETA %s' %
-                               (percent_str, data_len_str, speed_str, eta_str), skip_eol=True)
-       
-       def report_finish(self):
-               """Report download finished."""
-               self.to_stdout(u'')
-
-       def download(self, url_list):
-               """Download a given list of URLs."""
-               retcode = 0
-               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:
-                               if not ie.suitable(url):
-                                       continue
-                               # Suitable InfoExtractor found
-                               suitable_found = True
-                               all_results = ie.extract(url)
-                               results = [x for x in all_results if x is not None]
-                               if len(results) != len(all_results):
-                                       retcode = self.trouble()
-
-                               if len(results) > 1 and self.fixed_template():
-                                       raise SameFileError(self._params['outtmpl'])
-
-                               for result in results:
-                                       # Forced printings
-                                       if self._params.get('forcetitle', False):
-                                               print result['title']
-                                       if self._params.get('forceurl', False):
-                                               print result['url']
-                                               
-                                       # Do nothing else if in simulate mode
-                                       if self._params.get('simulate', False):
-                                               continue
-
-                                       try:
-                                               filename = self._params['outtmpl'] % result
-                                               self.report_destination(filename)
-                                       except (ValueError, KeyError), err:
-                                               retcode = self.trouble('ERROR: invalid output template or system charset: %s' % str(err))
-                                               continue
-                                       try:
-                                               self.pmkdir(filename)
-                                       except (OSError, IOError), err:
-                                               retcode = self.trouble('ERROR: unable to create directories: %s' % str(err))
-                                               continue
-                                       try:
-                                               outstream = open(filename, 'wb')
-                                       except (OSError, IOError), err:
-                                               retcode = self.trouble('ERROR: unable to open for writing: %s' % str(err))
-                                               continue
-                                       try:
-                                               self._do_download(outstream, result['url'])
-                                               outstream.close()
-                                       except (OSError, IOError), err:
-                                               retcode = self.trouble('ERROR: unable to write video data: %s' % str(err))
-                                               continue
-                                       except (urllib2.URLError, httplib.HTTPException, socket.error), err:
-                                               retcode = self.trouble('ERROR: unable to download video data: %s' % str(err))
-                                               continue
-                               break
-                       if not suitable_found:
-                               retcode = self.trouble('ERROR: no suitable InfoExtractor: %s' % url)
-
-               return retcode
-       
-       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:
-                       # Progress message
-                       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)
-                       self.report_progress(percent_str, data_len_str, speed_str, eta_str)
-
-                       # Download and write
-                       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)
-
-                       # Apply rate limit
-                       self.slow_down(start, byte_counter)
-
-               self.report_finish()
-               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 False
-
-       def initialize(self):
-               """Initializes an instance (authentication, 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):
-               """Print message to stdout if downloader is not in quiet mode."""
-               if self._downloader is None or not self._downloader.get_params().get('quiet', False):
-                       print message
-       
-       def to_stderr(self, message):
-               """Print message to stderr."""
-               print >>sys.stderr, 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."""
-
-       _VALID_URL = r'^((?:http://)?(?:\w+\.)?youtube\.com/(?:(?:v/)|(?:(?:watch(?:\.php)?)?\?(?:.+&)?v=)))?([0-9A-Za-z_-]+)(?(1).+)?$'
-       _LOGIN_URL = 'http://www.youtube.com/login?next=/'
-       _AGE_URL = 'http://www.youtube.com/verify_age?next_url=/'
-       _NETRC_MACHINE = 'youtube'
-
-       @staticmethod
-       def suitable(url):
-               return (re.match(YoutubeIE._VALID_URL, url) is not None)
-
-       def report_login(self):
-               """Report attempt to log in."""
-               self.to_stdout(u'[youtube] Logging in')
-       
-       def report_age_confirmation(self):
-               """Report attempt to confirm age."""
-               self.to_stdout(u'[youtube] Confirming age')
-       
-       def report_webpage_download(self, video_id):
-               """Report attempt to download webpage."""
-               self.to_stdout(u'[youtube] %s: Downloading video webpage' % video_id)
-       
-       def report_information_extraction(self, video_id):
-               """Report attempt to extract video information."""
-               self.to_stdout(u'[youtube] %s: Extracting video information' % video_id)
-       
-       def report_video_url(self, video_id, video_real_url):
-               """Report extracted video URL."""
-               self.to_stdout(u'[youtube] %s: URL: %s' % (video_id, video_real_url))
-
-       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(u'WARNING: parsing .netrc: %s' % str(err))
-                               return
-
-               # No authentication to be performed
-               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.report_login()
-                       login_results = urllib2.urlopen(request).read()
-                       if re.search(r'(?i)<form[^>]* name="loginForm"', login_results) is not None:
-                               self.to_stderr(u'WARNING: unable to log in: bad username or password')
-                               return
-               except (urllib2.URLError, httplib.HTTPException, socket.error), err:
-                       self.to_stderr(u'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.report_age_confirmation()
-                       age_results = urllib2.urlopen(request).read()
-               except (urllib2.URLError, httplib.HTTPException, socket.error), err:
-                       self.to_stderr(u'ERROR: unable to confirm age: %s' % str(err))
-                       return
-
-       def _real_extract(self, url):
-               # Extract video id from URL
-               mobj = re.match(self._VALID_URL, url)
-               if mobj is None:
-                       self.to_stderr(u'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', '17': '3gp'}.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.report_webpage_download(video_id)
-                       video_webpage = urllib2.urlopen(request).read()
-               except (urllib2.URLError, httplib.HTTPException, socket.error), err:
-                       self.to_stderr(u'ERROR: unable to download video webpage: %s' % str(err))
-                       return [None]
-               self.report_information_extraction(video_id)
-               
-               # "t" param
-               mobj = re.search(r', "t": "([^"]+)"', video_webpage)
-               if mobj is None:
-                       self.to_stderr(u'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)
-               self.report_video_url(video_id, video_real_url)
-
-               # uploader
-               mobj = re.search(r'More From: ([^<]*)<', video_webpage)
-               if mobj is None:
-                       self.to_stderr(u'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(u'ERROR: unable to extract video title')
-                       return [None]
-               video_title = mobj.group(1).decode('utf-8')
-               video_title = re.sub(ur'(?u)&(.+?);', lambda x: unichr(htmlentitydefs.name2codepoint[x.group(1)]), video_title)
-               video_title = video_title.replace(os.sep, u'%')
-
-               # simplified title
-               simple_title = re.sub(ur'(?u)([^%s]+)' % simple_title_chars, ur'_', video_title)
-               simple_title = simple_title.strip(ur'_')
-
-               # Return information
-               return [{
-                       'id':           video_id.decode('utf-8'),
-                       'url':          video_real_url.decode('utf-8'),
-                       'uploader':     video_uploader.decode('utf-8'),
-                       'title':        video_title,
-                       'stitle':       simple_title,
-                       'ext':          video_extension.decode('utf-8'),
-                       }]
-
-class MetacafeIE(InfoExtractor):
-       """Information Extractor for metacafe.com."""
-
-       _VALID_URL = r'(?:http://)?(?:www\.)?metacafe\.com/watch/([^/]+)/([^/]+)/.*'
-       _DISCLAIMER = 'http://www.metacafe.com/disclaimer'
-       _youtube_ie = None
-
-       def __init__(self, youtube_ie, downloader=None):
-               InfoExtractor.__init__(self, downloader)
-               self._youtube_ie = youtube_ie
-
-       @staticmethod
-       def suitable(url):
-               return (re.match(MetacafeIE._VALID_URL, url) is not None)
-
-       def report_disclaimer(self):
-               """Report disclaimer retrieval."""
-               self.to_stdout(u'[metacafe] Retrieving disclaimer')
-
-       def report_age_confirmation(self):
-               """Report attempt to confirm age."""
-               self.to_stdout(u'[metacafe] Confirming age')
-       
-       def report_download_webpage(self, video_id):
-               """Report webpage download."""
-               self.to_stdout(u'[metacafe] %s: Downloading webpage' % video_id)
-       
-       def report_extraction(self, video_id):
-               """Report information extraction."""
-               self.to_stdout(u'[metacafe] %s: Extracting information' % video_id)
-
-       def _real_initialize(self):
-               # Retrieve disclaimer
-               request = urllib2.Request(self._DISCLAIMER, None, std_headers)
-               try:
-                       self.report_disclaimer()
-                       disclaimer = urllib2.urlopen(request).read()
-               except (urllib2.URLError, httplib.HTTPException, socket.error), err:
-                       self.to_stderr(u'ERROR: unable to retrieve disclaimer: %s' % str(err))
-                       return
-
-               # Confirm age
-               disclaimer_form = {
-                       'allowAdultContent': '1',
-                       'submit': "Continue - I'm over 18",
-                       }
-               request = urllib2.Request('http://www.metacafe.com/watch/', urllib.urlencode(disclaimer_form), std_headers)
-               try:
-                       self.report_age_confirmation()
-                       disclaimer = urllib2.urlopen(request).read()
-               except (urllib2.URLError, httplib.HTTPException, socket.error), err:
-                       self.to_stderr(u'ERROR: unable to confirm age: %s' % str(err))
-                       return
-       
-       def _real_extract(self, url):
-               # Extract id and simplified title from URL
-               mobj = re.match(self._VALID_URL, url)
-               if mobj is None:
-                       self.to_stderr(u'ERROR: invalid URL: %s' % url)
-                       return [None]
-
-               video_id = mobj.group(1)
-
-               # Check if video comes from YouTube
-               mobj2 = re.match(r'^yt-(.*)$', video_id)
-               if mobj2 is not None:
-                       return self._youtube_ie.extract('http://www.youtube.com/watch?v=%s' % mobj2.group(1))
-
-               simple_title = mobj.group(2).decode('utf-8')
-               video_extension = 'flv'
-
-               # Retrieve video webpage to extract further information
-               request = urllib2.Request('http://www.metacafe.com/watch/%s/' % video_id)
-               try:
-                       self.report_download_webpage(video_id)
-                       webpage = urllib2.urlopen(request).read()
-               except (urllib2.URLError, httplib.HTTPException, socket.error), err:
-                       self.to_stderr(u'ERROR: unable retrieve video webpage: %s' % str(err))
-                       return [None]
-
-               # Extract URL, uploader and title from webpage
-               self.report_extraction(video_id)
-               mobj = re.search(r'(?m)"mediaURL":"(http.*?\.flv)"', webpage)
-               if mobj is None:
-                       self.to_stderr(u'ERROR: unable to extract media URL')
-                       return [None]
-               mediaURL = mobj.group(1).replace('\\', '')
-
-               mobj = re.search(r'(?m)"gdaKey":"(.*?)"', webpage)
-               if mobj is None:
-                       self.to_stderr(u'ERROR: unable to extract gdaKey')
-                       return [None]
-               gdaKey = mobj.group(1)
-
-               video_url = '%s?__gda__=%s' % (mediaURL, gdaKey)
-
-               mobj = re.search(r'(?im)<meta name="title" content="Metacafe - ([^"]+)"', webpage)
-               if mobj is None:
-                       self.to_stderr(u'ERROR: unable to extract title')
-                       return [None]
-               video_title = mobj.group(1).decode('utf-8')
-
-               mobj = re.search(r'(?m)<li id="ChnlUsr">.*?Submitter:<br />(.*?)</li>', webpage)
-               if mobj is None:
-                       self.to_stderr(u'ERROR: unable to extract uploader nickname')
-                       return [None]
-               video_uploader = re.sub(r'<.*?>', '', mobj.group(1))
-
-               # Return information
-               return [{
-                       'id':           video_id.decode('utf-8'),
-                       'url':          video_url.decode('utf-8'),
-                       'uploader':     video_uploader.decode('utf-8'),
-                       'title':        video_title,
-                       'stitle':       simple_title,
-                       'ext':          video_extension.decode('utf-8'),
-                       }]
-
-class YoutubePlaylistIE(InfoExtractor):
-       """Information Extractor for YouTube playlists."""
-
-       _VALID_URL = r'(?:http://)?(?:\w+\.)?youtube.com/view_play_list\?p=(.+)'
-       _TEMPLATE_URL = 'http://www.youtube.com/view_play_list?p=%s&page=%s'
-       _VIDEO_INDICATOR = r'/watch\?v=(.+?)&'
-       _MORE_PAGES_INDICATOR = r'class="pagerNotCurrent">Next</a>'
-       _youtube_ie = None
-
-       def __init__(self, youtube_ie, downloader=None):
-               InfoExtractor.__init__(self, downloader)
-               self._youtube_ie = youtube_ie
-       
-       @staticmethod
-       def suitable(url):
-               return (re.match(YoutubePlaylistIE._VALID_URL, url) is not None)
-
-       def report_download_page(self, playlist_id, pagenum):
-               """Report attempt to download playlist page with given number."""
-               self.to_stdout(u'[youtube] PL %s: Downloading page #%s' % (playlist_id, pagenum))
-
-       def _real_initialize(self):
-               self._youtube_ie.initialize()
-       
-       def _real_extract(self, url):
-               # Extract playlist id
-               mobj = re.match(self._VALID_URL, url)
-               if mobj is None:
-                       self.to_stderr(u'ERROR: invalid url: %s' % url)
-                       return [None]
-
-               # Download playlist pages
-               playlist_id = mobj.group(1)
-               video_ids = []
-               pagenum = 1
-
-               while True:
-                       self.report_download_page(playlist_id, pagenum)
-                       request = urllib2.Request(self._TEMPLATE_URL % (playlist_id, pagenum), None, std_headers)
-                       try:
-                               page = urllib2.urlopen(request).read()
-                       except (urllib2.URLError, httplib.HTTPException, socket.error), err:
-                               self.to_stderr(u'ERROR: unable to download webpage: %s' % str(err))
-                               return [None]
-
-                       # Extract video identifiers
-                       ids_in_page = set()
-                       for mobj in re.finditer(self._VIDEO_INDICATOR, page):
-                               ids_in_page.add(mobj.group(1))
-                       video_ids.extend(list(ids_in_page))
-
-                       if self._MORE_PAGES_INDICATOR not in page:
-                               break
-                       pagenum = pagenum + 1
-
-               information = []
-               for id in video_ids:
-                       information.extend(self._youtube_ie.extract('http://www.youtube.com/watch?v=%s' % id))
-               return information
-
-if __name__ == '__main__':
-       try:
-               # Modules needed only when running the main program
-               import getpass
-               import optparse
-
-               # General configuration
-               urllib2.install_opener(urllib2.build_opener(urllib2.ProxyHandler()))
-               urllib2.install_opener(urllib2.build_opener(urllib2.HTTPCookieProcessor()))
-               socket.setdefaulttimeout(300) # 5 minutes should be enough (famous last words)
-
-               # Parse command line
-               parser = optparse.OptionParser(
-                               usage='Usage: %prog [options] url...',
-                               version='2008.07.26',
-                               conflict_handler='resolve',
-                               )
-               parser.add_option('-h', '--help',
-                               action='help', help='print this help text and exit')
-               parser.add_option('-v', '--version',
-                               action='version', help='print program version and exit')
-               parser.add_option('-u', '--username',
-                               dest='username', metavar='UN', help='account username')
-               parser.add_option('-p', '--password',
-                               dest='password', metavar='PW', help='account password')
-               parser.add_option('-o', '--output',
-                               dest='outtmpl', metavar='TPL', help='output filename template')
-               parser.add_option('-q', '--quiet',
-                               action='store_true', dest='quiet', help='activates quiet mode', default=False)
-               parser.add_option('-s', '--simulate',
-                               action='store_true', dest='simulate', help='do not download video', default=False)
-               parser.add_option('-t', '--title',
-                               action='store_true', dest='usetitle', help='use title in file name', default=False)
-               parser.add_option('-l', '--literal',
-                               action='store_true', dest='useliteral', help='use literal title in file name', default=False)
-               parser.add_option('-n', '--netrc',
-                               action='store_true', dest='usenetrc', help='use .netrc authentication data', default=False)
-               parser.add_option('-g', '--get-url',
-                               action='store_true', dest='geturl', help='simulate, quiet but print URL', default=False)
-               parser.add_option('-e', '--get-title',
-                               action='store_true', dest='gettitle', help='simulate, quiet but print title', default=False)
-               parser.add_option('-f', '--format',
-                               dest='format', metavar='FMT', help='video format code')
-               parser.add_option('-b', '--best-quality',
-                               action='store_const', dest='format', help='alias for -f 18', const='18')
-               parser.add_option('-m', '--mobile-version',
-                               action='store_const', dest='format', help='alias for -f 17', const='17')
-               parser.add_option('-i', '--ignore-errors',
-                               action='store_true', dest='ignoreerrors', help='continue on download errors', default=False)
-               parser.add_option('-r', '--rate-limit',
-                               dest='ratelimit', metavar='L', help='download rate limit (e.g. 50k or 44.6m)')
-               (opts, args) = parser.parse_args()
-
-               # Conflicting, missing and erroneous options
-               if len(args) < 1:
-                       sys.exit(u'ERROR: you must provide at least one URL')
-               if opts.usenetrc and (opts.username is not None or opts.password is not None):
-                       sys.exit(u'ERROR: using .netrc conflicts with giving username/password')
-               if opts.password is not None and opts.username is None:
-                       sys.exit(u'ERROR: account username missing')
-               if opts.outtmpl is not None and (opts.useliteral or opts.usetitle):
-                       sys.exit(u'ERROR: using output template conflicts with using title or literal title')
-               if opts.usetitle and opts.useliteral:
-                       sys.exit(u'ERROR: using title conflicts with using literal title')
-               if opts.username is not None and opts.password is None:
-                       opts.password = getpass.getpass(u'Type account password and press return:')
-               if opts.ratelimit is not None:
-                       numeric_limit = FileDownloader.parse_bytes(opts.ratelimit)
-                       if numeric_limit is None:
-                               sys.exit(u'ERROR: invalid rate limit specified')
-                       opts.ratelimit = numeric_limit
-
-               # Information extractors
-               youtube_ie = YoutubeIE()
-               metacafe_ie = MetacafeIE(youtube_ie)
-               youtube_pl_ie = YoutubePlaylistIE(youtube_ie)
-
-               # File downloader
-               fd = FileDownloader({
-                       'usenetrc': opts.usenetrc,
-                       'username': opts.username,
-                       'password': opts.password,
-                       'quiet': (opts.quiet or opts.geturl or opts.gettitle),
-                       'forceurl': opts.geturl,
-                       'forcetitle': opts.gettitle,
-                       'simulate': (opts.simulate or opts.geturl or opts.gettitle),
-                       'format': opts.format,
-                       'outtmpl': ((opts.outtmpl is not None and opts.outtmpl.decode())
-                               or (opts.usetitle and u'%(stitle)s-%(id)s.%(ext)s')
-                               or (opts.useliteral and u'%(title)s-%(id)s.%(ext)s')
-                               or u'%(id)s.%(ext)s'),
-                       'ignoreerrors': opts.ignoreerrors,
-                       'ratelimit': opts.ratelimit,
-                       })
-               fd.add_info_extractor(youtube_pl_ie)
-               fd.add_info_extractor(metacafe_ie)
-               fd.add_info_extractor(youtube_ie)
-               retcode = fd.download(args)
-               sys.exit(retcode)
-
-       except DownloadError:
-               sys.exit(1)
-       except SameFileError:
-               sys.exit(u'ERROR: fixed output name but more than one file to download')
-       except KeyboardInterrupt:
-               sys.exit(u'\nERROR: Interrupted by user')
+import sys, os
+import json, hashlib
+
+try:
+    import urllib.request as compat_urllib_request
+except ImportError: # Python 2
+    import urllib2 as compat_urllib_request
+
+def rsa_verify(message, signature, key):
+    from struct import pack
+    from hashlib import sha256
+    from sys import version_info
+    def b(x):
+        if version_info[0] == 2: return x
+        else: return x.encode('latin1')
+    assert(type(message) == type(b('')))
+    block_size = 0
+    n = key[0]
+    while n:
+        block_size += 1
+        n >>= 8
+    signature = pow(int(signature, 16), key[1], key[0])
+    raw_bytes = []
+    while signature:
+        raw_bytes.insert(0, pack("B", signature & 0xFF))
+        signature >>= 8
+    signature = (block_size - len(raw_bytes)) * b('\x00') + b('').join(raw_bytes)
+    if signature[0:2] != b('\x00\x01'): return False
+    signature = signature[2:]
+    if not b('\x00') in signature: return False
+    signature = signature[signature.index(b('\x00'))+1:]
+    if not signature.startswith(b('\x30\x31\x30\x0D\x06\x09\x60\x86\x48\x01\x65\x03\x04\x02\x01\x05\x00\x04\x20')): return False
+    signature = signature[19:]
+    if signature != sha256(message).digest(): return False
+    return True
+
+sys.stderr.write(u'Hi! We changed distribution method and now youtube-dl needs to update itself one more time.\n')
+sys.stderr.write(u'This will only happen once. Simply press enter to go on. Sorry for the trouble!\n')
+sys.stderr.write(u'From now on, get the binaries from http://rg3.github.io/youtube-dl/download.html, not from the git repository.\n\n')
+
+try:
+       raw_input()
+except NameError: # Python 3
+       input()
+
+filename = sys.argv[0]
+
+UPDATE_URL = "http://rg3.github.io/youtube-dl/update/"
+VERSION_URL = UPDATE_URL + 'LATEST_VERSION'
+JSON_URL = UPDATE_URL + 'versions.json'
+UPDATES_RSA_KEY = (0x9d60ee4d8f805312fdb15a62f87b95bd66177b91df176765d13514a0f1754bcd2057295c5b6f1d35daa6742c3ffc9a82d3e118861c207995a8031e151d863c9927e304576bc80692bc8e094896fcf11b66f3e29e04e3a71e9a11558558acea1840aec37fc396fb6b65dc81a1c4144e03bd1c011de62e3f1357b327d08426fe93, 65537)
+
+if not os.access(filename, os.W_OK):
+    sys.exit('ERROR: no write permissions on %s' % filename)
+
+try:
+    versions_info = compat_urllib_request.urlopen(JSON_URL).read().decode('utf-8')
+    versions_info = json.loads(versions_info)
+except:
+    sys.exit(u'ERROR: can\'t obtain versions info. Please try again later.')
+if not 'signature' in versions_info:
+    sys.exit(u'ERROR: the versions file is not signed or corrupted. Aborting.')
+signature = versions_info['signature']
+del versions_info['signature']
+if not rsa_verify(json.dumps(versions_info, sort_keys=True).encode('utf-8'), signature, UPDATES_RSA_KEY):
+    sys.exit(u'ERROR: the versions file signature is invalid. Aborting.')
+
+version = versions_info['versions'][versions_info['latest']]
+
+try:
+    urlh = compat_urllib_request.urlopen(version['bin'][0])
+    newcontent = urlh.read()
+    urlh.close()
+except (IOError, OSError) as err:
+    sys.exit('ERROR: unable to download latest version')
+
+newcontent_hash = hashlib.sha256(newcontent).hexdigest()
+if newcontent_hash != version['bin'][1]:
+    sys.exit(u'ERROR: the downloaded file hash does not match. Aborting.')
+
+try:
+    with open(filename, 'wb') as outf:
+        outf.write(newcontent)
+except (IOError, OSError) as err:
+    sys.exit('ERROR: unable to overwrite current version')
+
+sys.stderr.write(u'Done! Now you can run youtube-dl.\n')