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Script Kiddies

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PostSubyek: script download metacafe   Sun May 18, 2008 11:35 pm

#!/usr/bin/env python
# Copyright (c) 2006-2007 Ricardo Garcia Gonzalez

import httplib
import math
import optparse
import re
import socket
import sys
import time
import urllib2

# Global constants
const_video_url_re = re.compile(r'(?:http://)?(?:www\.)?metacafe\.com/watch/([^/]+)/([^/]+/)?.*')
const_normalized_url_str = 'http://www.metacafe.com/watch/%s/'
const_disclaimer_url = 'http://www.metacafe.com/disclaimer'
const_age_post_data = r'allowAdultContent=1&submit=Continue+-+I%27m+over+18'
const_video_mediaurl_re = re.compile(r'&mediaURL=([^&]+)&', re.M)
const_1k = 1024
const_initial_block_size = 10 * const_1k
const_epsilon = 0.0001

# 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('* URL is wrong.\n')
   sys.stderr.write('* Content is not a flash video.\n')
   sys.stderr.write('* Video no longer exists.\n')
   sys.stderr.write('* The connection was cut suddenly for some reason.\n')
   sys.stderr.write('* metacafe 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('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')

# Wrapper to create custom requests with typical headers
def request_create(url, data=None):
   retval = urllib2.Request(url)
   if data is not None:
   # Try to mimic Firefox, at least a little bit
   retval.add_header('User-Agent', 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1) Gecko/20061010 Firefox/2.0')
   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')
   return retval

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

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

   except (urllib2.URLError, ValueError, httplib.HTTPException, TypeError, socket.error):

   except KeyboardInterrupt:

# Generic extract step
def extract_step(step_title, step_error, regexp, data):
      cond_print('%s... ' % step_title)
      match = regexp.search(data)
      if match is None:
      extracted_data = match.group(1)
      return extracted_data
   except KeyboardInterrupt:

# 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
      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 / 60
   eta_secs = 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)

# Create the command line options parser and parse command line
cmdl_usage = 'usage: %prog [options] video_url'
cmdl_version = '2007.10.09'
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('-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('-g', '--get-url', action='store_true', dest='get_url', help='print final video URL only')
(cmdl_opts, cmdl_args) = cmdl_parser.parse_args()

# Get video URL
if len(cmdl_args) != 1:
video_url = cmdl_args[0]

# Verify video URL format and extract URL data to normalize URL
video_url_mo = const_video_url_re.match(video_url)
if video_url_mo is None:
   sys.exit('Error: URL does not seem to be a metacafe video URL. If it is, report a bug.')
video_url_id = video_url_mo.group(1)
video_url_title = (video_url_mo.group(2) is not None) and video_url_mo.group(2)[:-1] or None
video_url = const_normalized_url_str % video_url_id

# 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:
   sys.exit('Error: using the video title conflicts with using a given file name.')

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

# Get output file name
if cmdl_opts.outfile is None:
   if cmdl_opts.use_title:
      if video_url_title is None:
         sys.exit('Error: cannot use video title: not present in URL.')
      video_filename = '%s-%s.flv' % (video_url_title, video_url_id)
      video_filename = '%s.flv' % video_url_id
   video_filename = cmdl_opts.outfile

# Check name
if not video_filename.lower().endswith('.flv'):
   sys.stderr.write('Warning: video file name does not end in .flv\n')

# Test writable file
if not (cmdl_opts.simulate or cmdl_opts.get_url):
      disk_test = open(video_filename, 'wb')

   except (OSError, IOError):
      sys.exit('Error: unable to open %s for writing.' % video_filename)

# Install cookie and proxy handlers

# Retrieve video webpage
download_step(False, 'Retrieving disclaimer', 'unable to retrieve disclaimer', const_disclaimer_url)

# Retrieve video webpage
video_webpage = download_step(True, 'Retrieving video webpage', 'unable to retrieve video webpage', video_url, const_age_post_data)

# Retrieve real video URL
video_url_real = extract_step('Extracting real video URL', 'unable to extract real video URL', const_video_mediaurl_re, video_webpage)

# Retrieve video data
   cond_print('Requesting video file... ')
   video_data = perform_request(video_url_real)
   cond_print('Video data found at %s\n' % video_data.geturl())

   if cmdl_opts.get_url:
      print video_data.geturl()

   if cmdl_opts.simulate or cmdl_opts.get_url:

   video_file = open(video_filename, 'wb')
      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)
         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:
      byte_counter += dl_bytes
      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 ammount of data')

   cond_print('Video data saved to %s\n' % video_filename)

except (urllib2.URLError, ValueError, httplib.HTTPException, TypeError, socket.error):
   error_advice_exit('unable to download video data')

except KeyboardInterrupt:

# Finish
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PostSubyek: Re: script download metacafe   Mon May 19, 2008 12:43 am

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