Create initial preview version of the new youtube-dl
This commit is contained in:
Ricardo Garcia
Ricardo Garcia
commit
4fa74b5252
438
youtube-dl
Executable file
438
youtube-dl
Executable file
@ -0,0 +1,438 @@
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#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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# Author: Ricardo Garcia Gonzalez
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# License: Public domain code
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import htmlentitydefs
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import httplib
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import math
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import netrc
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import os
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import os.path
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import re
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import socket
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import string
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import sys
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import time
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import urllib
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import urllib2
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std_headers = {
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'User-Agent': 'UserAgent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9) Gecko/2008052906 Firefox/3.0',
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'Accept-Charset': 'ISO-8859-1,utf-8;q=0.7,*;q=0.7',
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'Accept': 'text/xml,application/xml,application/xhtml+xml,text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5',
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'Accept-Language': 'en-us,en;q=0.5',
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}
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simple_title_chars = string.ascii_letters.decode('ascii') + string.digits.decode('ascii')
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class FileDownloader(object):
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"""File Downloader class.
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File downloader objects are the ones responsible of downloading the
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actual video file and writing it to disk if the user has requested
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it, among some other tasks. In most cases there should be one per
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program. As, given a video URL, the downloader doesn't know how to
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extract all the needed information, task that InfoExtractors do, it
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has to pass the URL to one of them.
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For this, file downloader objects have a method that allows
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InfoExtractors to be registered in a given order. When it is passed
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a URL, the file downloader handles it to the first InfoExtractor it
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finds that reports it's able to handle it. The InfoExtractor returns
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all the information to the FileDownloader and the latter downloads the
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file or does whatever it's instructed to do.
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File downloaders accept a lot of parameters. In order not to saturate
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the object constructor with arguments, it receives a dictionary of
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options instead. These options are available through the get_params()
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method for the InfoExtractors to use. The FileDownloader also registers
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itself as the downloader in charge for the InfoExtractors that are
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added to it, so this is a "mutual registration".
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Available options:
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username: Username for authentication purposes.
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password: Password for authentication purposes.
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usenetrc: Use netrc for authentication instead.
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quiet: Do not print messages to stdout.
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format: Video format code.
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outtmpl: Template for output names.
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"""
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_params = None
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_ies = []
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def __init__(self, params):
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self._ies = []
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self.set_params(params)
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@staticmethod
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def pmkdir(filename):
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"""Create directory components in filename. Similar to Unix "mkdir -p"."""
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components = filename.split(os.sep)
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aggregate = [os.sep.join(components[0:x]) for x in xrange(1, len(components))]
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for dir in aggregate:
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if not os.path.exists(dir):
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os.mkdir(dir)
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@staticmethod
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def format_bytes(bytes):
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if bytes is None:
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return 'N/A'
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if bytes == 0:
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exponent = 0
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else:
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exponent = long(math.log(float(bytes), 1024.0))
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suffix = 'bkMGTPEZY'[exponent]
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if exponent == 0:
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return '%s%s' % (bytes, suffix)
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converted = float(bytes) / float(1024**exponent)
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return '%.2f%s' % (converted, suffix)
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@staticmethod
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def calc_percent(byte_counter, data_len):
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if data_len is None:
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return '---.-%'
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return '%6s' % ('%3.1f%%' % (float(byte_counter) / float(data_len) * 100.0))
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@staticmethod
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def calc_eta(start, now, total, current):
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if total is None:
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return '--:--'
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dif = now - start
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if current == 0 or dif < 0.001: # One millisecond
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return '--:--'
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rate = float(current) / dif
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eta = long((float(total) - float(current)) / rate)
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(eta_mins, eta_secs) = divmod(eta, 60)
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if eta_mins > 99:
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return '--:--'
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return '%02d:%02d' % (eta_mins, eta_secs)
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@staticmethod
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def calc_speed(start, now, bytes):
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dif = now - start
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if bytes == 0 or dif < 0.001: # One millisecond
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return '%9s' % 'N/A b/s'
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return '%10s' % ('%s/s' % FileDownloader.format_bytes(float(bytes) / dif))
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@staticmethod
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def best_block_size(elapsed_time, bytes):
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new_min = max(bytes / 2.0, 1.0)
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new_max = min(max(bytes * 2.0, 1.0), 4194304) # Do not surpass 4 MB
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if elapsed_time < 0.001:
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return int(new_max)
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rate = bytes / elapsed_time
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if rate > new_max:
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return int(new_max)
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if rate < new_min:
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return int(new_min)
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return int(rate)
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def set_params(self, params):
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"""Sets parameters."""
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if type(params) != dict:
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raise ValueError('params: dictionary expected')
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self._params = params
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def get_params(self):
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"""Get parameters."""
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return self._params
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def add_info_extractor(self, ie):
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"""Add an InfoExtractor object to the end of the list."""
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self._ies.append(ie)
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ie.set_downloader(self)
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def download(self, url_list):
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"""Download a given list of URLs."""
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for url in url_list:
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suitable_found = False
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for ie in self._ies:
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if not ie.suitable(url):
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continue
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# Suitable InfoExtractor found
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suitable_found = True
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for result in ie.extract(url):
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if result is None:
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continue
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try:
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filename = self._params['outtmpl'] % result
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except (KeyError), err:
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sys.stderr.write('ERROR: invalid output template: %s\n' % str(err))
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continue
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try:
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self.pmkdir(filename)
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except (OSError, IOError), err:
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sys.stderr.write('ERROR: unable to create directories: %s\n' % str(err))
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continue
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try:
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outstream = open(filename, 'wb')
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except (OSError, IOError), err:
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sys.stderr.write('ERROR: unable to open for writing: %s\n' % str(err))
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continue
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try:
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self._do_download(outstream, result['url'])
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outstream.close()
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except (OSError, IOError), err:
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sys.stderr.write('ERROR: unable to write video data: %s\n' % str(err))
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continue
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except (urllib2.URLError, httplib.HTTPException, socket.error), err:
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sys.stderr.write('ERROR: unable to download video data: %s\n' % str(err))
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continue
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break
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if not suitable_found:
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sys.stderr.write('ERROR: no suitable InfoExtractor: %s\n' % url)
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def _do_download(self, stream, url):
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request = urllib2.Request(url, None, std_headers)
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data = urllib2.urlopen(request)
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data_len = data.info().get('Content-length', None)
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data_len_str = self.format_bytes(data_len)
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byte_counter = 0
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block_size = 1024
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start = time.time()
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while True:
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percent_str = self.calc_percent(byte_counter, data_len)
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eta_str = self.calc_eta(start, time.time(), data_len, byte_counter)
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speed_str = self.calc_speed(start, time.time(), byte_counter)
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if not self._params.get('quiet', False):
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sys.stdout.write('\r[download] %s of %s at %s ETA %s' %
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(percent_str, data_len_str, speed_str, eta_str))
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sys.stdout.flush()
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before = time.time()
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data_block = data.read(block_size)
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after = time.time()
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data_block_len = len(data_block)
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if data_block_len == 0:
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break
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byte_counter += data_block_len
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stream.write(data_block)
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block_size = self.best_block_size(after - before, data_block_len)
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if not self._params.get('quiet', False):
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print
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if data_len is not None and str(byte_counter) != data_len:
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raise ValueError('Content too short: %s/%s bytes' % (byte_counter, data_len))
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class InfoExtractor(object):
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"""Information Extractor class.
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Information extractors are the classes that, given a URL, extract
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information from the video (or videos) the URL refers to. This
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information includes the real video URL, the video title and simplified
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title, author and others. It is returned in a list of dictionaries when
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calling its extract() method. It is a list because a URL can refer to
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more than one video (think of playlists). The dictionaries must include
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the following fields:
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id: Video identifier.
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url: Final video URL.
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uploader: Nickname of the video uploader.
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title: Literal title.
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stitle: Simplified title.
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ext: Video filename extension.
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Subclasses of this one should re-define the _real_initialize() and
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_real_extract() methods, as well as the suitable() static method.
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Probably, they should also be instantiated and added to the main
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downloader.
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"""
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_ready = False
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_downloader = None
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def __init__(self, downloader=None):
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"""Constructor. Receives an optional downloader."""
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self._ready = False
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self.set_downloader(downloader)
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@staticmethod
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def suitable(url):
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"""Receives a URL and returns True if suitable for this IE."""
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return True
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def initialize(self):
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"""Initializes an instance (login, etc)."""
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if not self._ready:
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self._real_initialize()
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self._ready = True
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def extract(self, url):
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"""Extracts URL information and returns it in list of dicts."""
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self.initialize()
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return self._real_extract(url)
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def set_downloader(self, downloader):
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"""Sets the downloader for this IE."""
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self._downloader = downloader
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def to_stdout(self, message):
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if self._downloader is None or not self._downloader.get_params().get('quiet', False):
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print message
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def to_stderr(self, message):
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sys.stderr.write('%s\n' % message)
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def _real_initialize(self):
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"""Real initialization process. Redefine in subclasses."""
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pass
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def _real_extract(self, url):
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"""Real extraction process. Redefine in subclasses."""
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pass
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class YoutubeIE(InfoExtractor):
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"""Information extractor for youtube.com."""
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_LOGIN_URL = 'http://www.youtube.com/login?next=/'
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_AGE_URL = 'http://www.youtube.com/verify_age?next_url=/'
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_NETRC_MACHINE = 'youtube'
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def _real_initialize(self):
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if self._downloader is None:
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return
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username = None
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password = None
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downloader_params = self._downloader.get_params()
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# Attempt to use provided username and password or .netrc data
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if downloader_params.get('username', None) is not None:
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username = downloader_params['username']
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password = downloader_params['password']
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elif downloader_params.get('usenetrc', False):
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try:
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info = netrc.netrc().authenticators(self._NETRC_MACHINE)
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if info is not None:
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username = info[0]
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password = info[2]
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else:
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raise netrc.NetrcParseError('No authenticators for %s' % self._NETRC_MACHINE)
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except (IOError, netrc.NetrcParseError), err:
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self.to_stderr('WARNING: parsing .netrc: %s' % str(err))
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return
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if username is None:
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return
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# Log in
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login_form = { 'current_form': 'loginForm',
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'next': '/',
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'action_login': 'Log In',
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'username': username,
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'password': password, }
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request = urllib2.Request(self._LOGIN_URL, urllib.urlencode(login_form), std_headers)
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try:
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self.to_stdout('[youtube] Logging in')
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login_results = urllib2.urlopen(request).read()
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if re.search(r'(?i)<form[^>]* name="loginForm"', login_results) is not None:
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self.to_stderr('WARNING: Unable to log in: bad username or password')
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return
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except (urllib2.URLError, httplib.HTTPException, socket.error), err:
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self.to_stderr('WARNING: Unable to log in: %s' % str(err))
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return
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# Confirm age
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age_form = { 'next_url': '/',
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'action_confirm': 'Confirm', }
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request = urllib2.Request(self._AGE_URL, urllib.urlencode(age_form), std_headers)
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try:
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self.to_stdout('[youtube] Confirming age')
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age_results = urllib2.urlopen(request).read()
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except (urllib2.URLError, httplib.HTTPException, socket.error), err:
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sys.exit('ERROR: Unable to confirm age: %s' % str(err))
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def _real_extract(self, url):
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# Extract video id from URL
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mobj = re.match(r'^((?:http://)?(?:\w+\.)?youtube\.com/(?:(?:v/)|(?:(?:watch(?:\.php)?)?\?(?:.+&)?v=)))?([0-9A-Za-z_-]+)(?(1).+)?$', url)
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if mobj is None:
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self.to_stderr('ERROR: Invalid URL: %s' % url)
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return [None]
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video_id = mobj.group(2)
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# Downloader parameters
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format_param = None
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if self._downloader is not None:
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params = self._downloader.get_params()
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format_param = params.get('format', None)
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# Extension
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video_extension = {18: 'mp4'}.get(format_param, 'flv')
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# Normalize URL, including format
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normalized_url = 'http://www.youtube.com/watch?v=%s' % video_id
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if format_param is not None:
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normalized_url = '%s&fmt=%s' % (normalized_url, format_param)
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request = urllib2.Request(normalized_url, None, std_headers)
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try:
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self.to_stdout('[youtube] %s: Downloading video webpage' % video_id)
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video_webpage = urllib2.urlopen(request).read()
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except (urllib2.URLError, httplib.HTTPException, socket.error), err:
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sys.exit('ERROR: Unable to download video: %s' % str(err))
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self.to_stdout('[youtube] %s: Extracting video information' % video_id)
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# "t" param
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mobj = re.search(r', "t": "([^"]+)"', video_webpage)
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if mobj is None:
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self.to_stderr('ERROR: Unable to extract "t" parameter')
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return [None]
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video_real_url = 'http://www.youtube.com/get_video?video_id=%s&t=%s' % (video_id, mobj.group(1))
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if format_param is not None:
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video_real_url = '%s&fmt=%s' % (video_real_url, format_param)
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# uploader
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mobj = re.search(r'More From: ([^<]*)<', video_webpage)
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if mobj is None:
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self.to_stderr('ERROR: Unable to extract uploader nickname')
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return [None]
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video_uploader = mobj.group(1)
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# title
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mobj = re.search(r'(?im)<title>YouTube - ([^<]*)</title>', video_webpage)
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if mobj is None:
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self.to_stderr('ERROR: Unable to extract video title')
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return [None]
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video_title = mobj.group(1).decode('utf-8')
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video_title = re.sub(u'&(.+?);', lambda x: unichr(htmlentitydefs.name2codepoint[x.group(1)]), video_title)
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# simplified title
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simple_title = re.sub(u'([^%s]+)' % simple_title_chars, u'_', video_title)
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simple_title = simple_title.strip(u'_')
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# Return information
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return [{ 'id': video_id,
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'url': video_real_url,
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'uploader': video_uploader,
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'title': video_title,
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'stitle': simple_title,
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'ext': video_extension,
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}]
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if __name__ == '__main__':
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try:
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# General configuration
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urllib2.install_opener(urllib2.build_opener(urllib2.ProxyHandler()))
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urllib2.install_opener(urllib2.build_opener(urllib2.HTTPCookieProcessor()))
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# Information extractors
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youtube_ie = YoutubeIE()
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# File downloader
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fd = FileDownloader({ 'usenetrc': False,
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'username': None,
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'password': None,
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'quiet': False,
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'format': None,
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'outtmpl': '%(id)s.%(ext)s'
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})
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fd.add_info_extractor(youtube_ie)
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fd.download([ 'http://www.youtube.com/watch?v=t7qdwI7TVe8',
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'http://www.youtube.com/watch?v=IJyn3pRcy_Q',
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'http://www.youtube.com/watch?v=DZRXe1wtC-M', ])
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except KeyboardInterrupt:
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sys.exit('\nERROR: Interrupted by user')
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