Raphaël G. Git Repositories - youtubedl/blob - youtube-dl

   1 #!/usr/bin/env python
   2 #
   3 # Copyright (c) 2006-2008 Ricardo Garcia Gonzalez
   4 #
   5 # Permission is hereby granted, free of charge, to any person obtaining a
   6 # copy of this software and associated documentation files (the "Software"),
   7 # to deal in the Software without restriction, including without limitation
   8 # the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9 # and/or sell copies of the Software, and to permit persons to whom the
  10 # Software is furnished to do so, subject to the following conditions:
  11 #
  12 # The above copyright notice and this permission notice shall be included
  13 # in all copies or substantial portions of the Software.
  14 #
  15 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16 # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17 # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  18 # THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  19 # OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  20 # ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  21 # OTHER DEALINGS IN THE SOFTWARE.
  22 #
  23 # Except as contained in this notice, the name(s) of the above copyright
  24 # holders shall not be used in advertising or otherwise to promote the
  25 # sale, use or other dealings in this Software without prior written
  26 # authorization.
  27 #
  28 import getpass
  29 import httplib
  30 import math
  31 import netrc
  32 import optparse
  33 import os
  34 import re
  35 import socket
  36 import string
  37 import sys
  38 import time
  39 import urllib2
  40
  41 # Global constants
  42 const_1k = 1024
  43 const_initial_block_size = 10 * const_1k
  44 const_epsilon = 0.0001
  45 const_timeout = 120
  46
  47 const_video_url_str = 'http://www.youtube.com/watch?v=%s'
  48 const_video_url_re = re.compile(r'^((?:http://)?(?:\w+\.)?youtube\.com/(?:v/|(?:watch(?:\.php)?)?\?(?:.+&)?v=))?([0-9A-Za-z_-]+)(?(1)[&/].*)?$')
  49 const_video_url_format_suffix = '&fmt=%s'
  50 const_best_quality_format = 18
  51 const_login_url_str = 'http://www.youtube.com/login?next=/watch%%3Fv%%3D%s'
  52 const_login_post_str = 'current_form=loginForm&next=%%2Fwatch%%3Fv%%3D%s&username=%s&password=%s&action_login=Log+In'
  53 const_age_url_str = 'http://www.youtube.com/verify_age?next_url=/watch%%3Fv%%3D%s'
  54 const_age_post_str = 'next_url=%%2Fwatch%%3Fv%%3D%s&action_confirm=Confirm'
  55 const_url_t_param_re = re.compile(r', "t": "([^"]+)"')
  56 const_video_url_real_str = 'http://www.youtube.com/get_video?video_id=%s&t=%s'
  57 const_video_title_re = re.compile(r'<title>YouTube - ([^<]*)</title>', re.M | re.I)
  58
  59 # Print error message, followed by standard advice information, and then exit
  60 def error_advice_exit(error_text):
  61         sys.stderr.write('Error: %s.\n' % error_text)
  62         sys.stderr.write('Try again several times. It may be a temporary problem.\n')
  63         sys.stderr.write('Other typical problems:\n\n')
  64         sys.stderr.write('* Video no longer exists.\n')
  65         sys.stderr.write('* Video requires age confirmation but you did not provide an account.\n')
  66         sys.stderr.write('* You provided the account data, but it is not valid.\n')
  67         sys.stderr.write('* The connection was cut suddenly for some reason.\n')
  68         sys.stderr.write('* YouTube changed their system, and the program no longer works.\n')
  69         sys.stderr.write('\nTry to confirm you are able to view the video using a web browser.\n')
  70         sys.stderr.write('Use the same video URL and account information, if needed, with this program.\n')
  71         sys.stderr.write('When using a proxy, make sure http_proxy has http://host:port format.\n')
  72         sys.stderr.write('Try again several times and contact me if the problem persists.\n')
  73         sys.exit('\n')
  74
  75 # Wrapper to create custom requests with typical headers
  76 def request_create(url, extra_headers, post_data):
  77         retval = urllib2.Request(url)
  78         if post_data is not None:
  79                 retval.add_data(post_data)
  80         # Try to mimic Firefox, at least a little bit
  81         retval.add_header('User-Agent', 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.11) Gecko/20071127 Firefox/2.0.0.11')
  82         retval.add_header('Accept-Charset', 'ISO-8859-1,utf-8;q=0.7,*;q=0.7')
  83         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')
  84         retval.add_header('Accept-Language', 'en-us,en;q=0.5')
  85         if extra_headers is not None:
  86                 for header in extra_headers:
  87                         retval.add_header(header[0], header[1])
  88         return retval
  89
  90 # Perform a request, process headers and return response
  91 def perform_request(url, headers=None, data=None):
  92         request = request_create(url, headers, data)
  93         response = urllib2.urlopen(request)
  94         return response
  95
  96 # Conditional print
  97 def cond_print(str):
  98         global cmdl_opts
  99         if not (cmdl_opts.quiet or cmdl_opts.get_url):
 100                 sys.stdout.write(str)
 101                 sys.stdout.flush()
 102
 103 # Title string normalization
 104 def title_string_norm(title):
 105         title = ''.join((x in string.ascii_letters or x in string.digits) and x or ' ' for x in title)
 106         title = '_'.join(title.split())
 107         title = title.lower()
 108         return title
 109
 110 # Generic download step
 111 def download_step(return_data_flag, step_title, step_error, url, post_data=None):
 112         try:
 113                 cond_print('%s... ' % step_title)
 114                 data = perform_request(url, data=post_data).read()
 115                 cond_print('done.\n')
 116                 if return_data_flag:
 117                         return data
 118                 return None
 119
 120         except (urllib2.URLError, ValueError, httplib.HTTPException, TypeError, socket.error):
 121                 cond_print('failed.\n')
 122                 error_advice_exit(step_error)
 123
 124         except KeyboardInterrupt:
 125                 sys.exit('\n')
 126
 127 # Generic extract step
 128 def extract_step(step_title, step_error, regexp, data):
 129         try:
 130                 cond_print('%s... ' % step_title)
 131                 match = regexp.search(data)
 132
 133                 if match is None:
 134                         cond_print('failed.\n')
 135                         error_advice_exit(step_error)
 136
 137                 extracted_data = match.group(1)
 138                 cond_print('done.\n')
 139                 return extracted_data
 140
 141         except KeyboardInterrupt:
 142                 sys.exit('\n')
 143
 144 # Calculate new block size based on previous block size
 145 def new_block_size(before, after, bytes):
 146         new_min = max(bytes / 2.0, 1.0)
 147         new_max = max(bytes * 2.0, 1.0)
 148         dif = after - before
 149         if dif < const_epsilon:
 150                 return int(new_max)
 151         rate = bytes / dif
 152         if rate > new_max:
 153                 return int(new_max)
 154         if rate < new_min:
 155                 return int(new_min)
 156         return int(rate)
 157
 158 # Get optimum 1k exponent to represent a number of bytes
 159 def optimum_k_exp(num_bytes):
 160         global const_1k
 161         if num_bytes == 0:
 162                 return 0
 163         return long(math.log(num_bytes, const_1k))
 164
 165 # Get optimum representation of number of bytes
 166 def format_bytes(num_bytes):
 167         global const_1k
 168         try:
 169                 exp = optimum_k_exp(num_bytes)
 170                 suffix = 'bkMGTPEZY'[exp]
 171                 if exp == 0:
 172                         return '%s%s' % (num_bytes, suffix)
 173                 converted = float(num_bytes) / float(const_1k**exp)
 174                 return '%.2f%s' % (converted, suffix)
 175         except IndexError:
 176                 sys.exit('Error: internal error formatting number of bytes.')
 177
 178 # Calculate ETA and return it in string format as MM:SS
 179 def calc_eta(start, now, total, current):
 180         dif = now - start
 181         if current == 0 or dif < const_epsilon:
 182                 return '--:--'
 183         rate = float(current) / dif
 184         eta = long((total - current) / rate)
 185         (eta_mins, eta_secs) = divmod(eta, 60)
 186         if eta_mins > 99:
 187                 return '--:--'
 188         return '%02d:%02d' % (eta_mins, eta_secs)
 189
 190 # Calculate speed and return it in string format
 191 def calc_speed(start, now, bytes):
 192         dif = now - start
 193         if bytes == 0 or dif < const_epsilon:
 194                 return 'N/A b'
 195         return format_bytes(float(bytes) / dif)
 196
 197
 198 # Title string minimal transformation
 199 def title_string_touch(title):
 200         return title.replace(os.sep, '%')
 201
 202 # Create the command line options parser and parse command line
 203 cmdl_usage = 'usage: %prog [options] video_url'
 204 cmdl_version = '2008.03.22'
 205 cmdl_parser = optparse.OptionParser(usage=cmdl_usage, version=cmdl_version, conflict_handler='resolve')
 206 cmdl_parser.add_option('-h', '--help', action='help', help='print this help text and exit')
 207 cmdl_parser.add_option('-v', '--version', action='version', help='print program version and exit')
 208 cmdl_parser.add_option('-u', '--username', dest='username', metavar='USERNAME', help='account username')
 209 cmdl_parser.add_option('-p', '--password', dest='password', metavar='PASSWORD', help='account password')
 210 cmdl_parser.add_option('-o', '--output', dest='outfile', metavar='FILE', help='output video file name')
 211 cmdl_parser.add_option('-q', '--quiet', action='store_true', dest='quiet', help='activates quiet mode')
 212 cmdl_parser.add_option('-s', '--simulate', action='store_true', dest='simulate', help='do not download video')
 213 cmdl_parser.add_option('-t', '--title', action='store_true', dest='use_title', help='use title in file name')
 214 cmdl_parser.add_option('-l', '--literal', action='store_true', dest='use_literal', help='use literal title in file name')
 215 cmdl_parser.add_option('-n', '--netrc', action='store_true', dest='use_netrc', help='use .netrc authentication data')
 216 cmdl_parser.add_option('-g', '--get-url', action='store_true', dest='get_url', help='print final video URL only')
 217 cmdl_parser.add_option('-2', '--title-too', action='store_true', dest='get_title', help='used with -g, print title too')
 218 cmdl_parser.add_option('-f', '--format', dest='video_format', metavar='FORMAT', help='append &fmt=FORMAT to the URL')
 219 cmdl_parser.add_option('-b', '--best-quality', action='store_true', dest='best_quality', help='alias for -f 18')
 220 (cmdl_opts, cmdl_args) = cmdl_parser.parse_args()
 221
 222 # Set socket timeout
 223 socket.setdefaulttimeout(const_timeout)
 224
 225 # Get video URL
 226 if len(cmdl_args) != 1:
 227         cmdl_parser.print_help()
 228         sys.exit('\n')
 229 video_url_cmdl = cmdl_args[0]
 230
 231 # Verify video URL format and convert to "standard" format
 232 video_url_mo = const_video_url_re.match(video_url_cmdl)
 233 if video_url_mo is None:
 234         sys.exit('Error: URL does not seem to be a youtube video URL. If it is, report a bug.')
 235 video_url_id = video_url_mo.group(2)
 236 video_url = const_video_url_str % video_url_id
 237
 238 video_format = None
 239 if cmdl_opts.best_quality:
 240         video_format = const_best_quality_format
 241         video_extension = '.mp4'
 242 else:
 243         video_extension = '.flv'
 244
 245 if cmdl_opts.video_format is not None:
 246         if video_format is not None and video_format != cmdl_opts.video_format:
 247                 sys.exit('Error: conflicting video formats specified\n')
 248         video_format = cmdl_opts.video_format
 249
 250 if video_format is not None:
 251         video_url = '%s%s' % (video_url, const_video_url_format_suffix % video_format)
 252
 253 # Check conflicting options
 254 if cmdl_opts.outfile is not None and (cmdl_opts.simulate or cmdl_opts.get_url):
 255         sys.stderr.write('Warning: video file name given but will not be used.\n')
 256
 257 if cmdl_opts.outfile is not None and (cmdl_opts.use_title or cmdl_opts.use_literal):
 258         sys.exit('Error: using the video title conflicts with using a given file name.')
 259
 260 if cmdl_opts.use_title and cmdl_opts.use_literal:
 261         sys.exit('Error: cannot use title and literal title at the same time.')
 262
 263 if cmdl_opts.quiet and cmdl_opts.get_url:
 264         sys.exit('Error: cannot be quiet and print final URL at the same time.')
 265
 266 # Incorrect option formatting
 267 if cmdl_opts.username is None and cmdl_opts.password is not None:
 268         sys.exit('Error: password give but username is missing.')
 269
 270 if cmdl_opts.use_netrc and (cmdl_opts.username is not None or cmdl_opts.password is not None):
 271         sys.exit('Error: cannot use netrc and username/password at the same time.')
 272
 273 if cmdl_opts.get_url is None and cmdl_opts.get_title is not None:
 274         sys.exit('Error: getting title requires getting URL.')
 275
 276 # Get account information if any
 277 account_username = None
 278 account_password = None
 279
 280 if cmdl_opts.use_netrc:
 281         try:
 282                 info = netrc.netrc().authenticators('youtube')
 283                 if info is None:
 284                         sys.exit('Error: no authenticators for machine youtube.')
 285                 account_username = info[0]
 286                 account_password = info[2]
 287         except IOError:
 288                 sys.exit('Error: unable to read .netrc file.')
 289         except netrc.NetrcParseError:
 290                 sys.exit('Error: unable to parse .netrc file.')
 291 else:
 292         account_username = cmdl_opts.username
 293         if account_username is not None:
 294                 if cmdl_opts.password is None:
 295                         account_password = getpass.getpass('Type YouTube password and press return: ')
 296                 else:
 297                         account_password = cmdl_opts.password
 298
 299 # Get output file name
 300 if cmdl_opts.outfile is None:
 301         video_filename = '%s%s' % (video_url_id, video_extension)
 302 else:
 303         video_filename = cmdl_opts.outfile
 304
 305 # Install cookie and proxy handlers
 306 urllib2.install_opener(urllib2.build_opener(urllib2.ProxyHandler()))
 307 urllib2.install_opener(urllib2.build_opener(urllib2.HTTPCookieProcessor()))
 308
 309 # Log in and confirm age if needed
 310 if account_username is not None:
 311         url = const_login_url_str % video_url_id
 312         post = const_login_post_str % (video_url_id, account_username, account_password)
 313         download_step(False, 'Logging in', 'unable to log in', url, post)
 314
 315         url = const_age_url_str % video_url_id
 316         post = const_age_post_str % video_url_id
 317         download_step(False, 'Confirming age', 'unable to confirm age', url, post)
 318
 319 # Retrieve video webpage
 320 video_webpage = download_step(True, 'Retrieving video webpage', 'unable to retrieve video webpage', video_url)
 321
 322 # Extract video title if needed
 323 if cmdl_opts.use_title or cmdl_opts.use_literal or cmdl_opts.get_title:
 324         video_title = extract_step('Extracting video title', 'unable to extract video title', const_video_title_re, video_webpage)
 325
 326 # Extract needed video URL parameters
 327 video_url_t_param = extract_step('Extracting URL "t" parameter', 'unable to extract URL "t" parameter', const_url_t_param_re, video_webpage)
 328 video_url_real = const_video_url_real_str % (video_url_id, video_url_t_param)
 329 if video_format is not None:
 330         video_url_real = '%s%s' % (video_url_real, const_video_url_format_suffix % video_format)
 331
 332 # Rebuild filename if needed
 333 if cmdl_opts.use_title or cmdl_opts.use_literal:
 334         if cmdl_opts.use_title:
 335                 prefix = title_string_norm(video_title)
 336         else:
 337                 prefix = title_string_touch(video_title)
 338         video_filename = '%s-%s%s' % (prefix, video_url_id, video_extension)
 339
 340 # Check name
 341 if not video_filename.lower().endswith(video_extension):
 342         sys.stderr.write('Warning: video file name does not end in %s\n' % video_extension)
 343
 344 # Retrieve video data
 345 try:
 346         cond_print('Requesting video file... ')
 347         video_data = perform_request(video_url_real)
 348         cond_print('done.\n')
 349         cond_print('Video data found at %s\n' % video_data.geturl())
 350
 351         if cmdl_opts.get_title:
 352                 print video_title
 353
 354         if cmdl_opts.get_url:
 355                 print video_data.geturl()
 356
 357         if cmdl_opts.simulate or cmdl_opts.get_url:
 358                 sys.exit()
 359
 360         try:
 361                 video_file = open(video_filename, 'wb')
 362         except (IOError, OSError):
 363                 sys.exit('Error: unable to open "%s" for writing.' % video_filename)
 364         try:
 365                 video_len = long(video_data.info()['Content-length'])
 366                 video_len_str = format_bytes(video_len)
 367         except KeyError:
 368                 video_len = None
 369                 video_len_str = 'N/A'
 370
 371         byte_counter = 0
 372         block_size = const_initial_block_size
 373         start_time = time.time()
 374         while True:
 375                 if video_len is not None:
 376                         percent = float(byte_counter) / float(video_len) * 100.0
 377                         percent_str = '%.1f' % percent
 378                         eta_str = calc_eta(start_time, time.time(), video_len, byte_counter)
 379                 else:
 380                         percent_str = '---.-'
 381                         eta_str = '--:--'
 382                 counter = format_bytes(byte_counter)
 383                 speed_str = calc_speed(start_time, time.time(), byte_counter)
 384                 cond_print('\rRetrieving video data: %5s%% (%8s of %s) at %8s/s ETA %s ' % (percent_str, counter, video_len_str, speed_str, eta_str))
 385
 386                 before = time.time()
 387                 video_block = video_data.read(block_size)
 388                 after = time.time()
 389                 dl_bytes = len(video_block)
 390                 if dl_bytes == 0:
 391                         break
 392                 byte_counter += dl_bytes
 393                 video_file.write(video_block)
 394                 block_size = new_block_size(before, after, dl_bytes)
 395
 396         if video_len is not None and byte_counter != video_len:
 397                 error_advice_exit('server did not send the expected ammount of data')
 398
 399         video_file.close()
 400         cond_print('done.\n')
 401         cond_print('Video data saved to %s\n' % video_filename)
 402
 403 except (urllib2.URLError, ValueError, httplib.HTTPException, TypeError, socket.error):
 404         cond_print('failed.\n')
 405         error_advice_exit('unable to download video data')
 406
 407 except KeyboardInterrupt:
 408         sys.exit('\n')
 409
 410 # Finish
 411 sys.exit()