#!/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 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. """ _params = None _ies = [] def __init__(self, params): self._ies = [] self.set_params(params) @staticmethod def pmkdir(filename): """Create directory components in filename. Similar to Unix "mkdir -p".""" components = filename.split(os.sep) aggregate = [os.sep.join(components[0:x]) for x in xrange(1, len(components))] for dir in aggregate: if not os.path.exists(dir): os.mkdir(dir) @staticmethod def format_bytes(bytes): if bytes is None: return 'N/A' if bytes == 0: exponent = 0 else: exponent = long(math.log(float(bytes), 1024.0)) suffix = 'bkMGTPEZY'[exponent] 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) 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): sys.stdout.write('%s%s' % (message, ['\n', ''][skip_eol])) sys.stdout.flush() def to_stderr(self, message): """Print message to stderr.""" sys.stderr.write('%s\n' % message) def fixed_template(self): """Checks if the output template is fixed.""" return (re.search(ur'(?u)%\(.+?\)s', self._params['outtmpl']) is None) def download(self, url_list): """Download a given list of URLs.""" if len(url_list) > 1 and self.fixed_template(): sys.exit('ERROR: fixed output name but more than one file to download') 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 results = [x for x in ie.extract(url) if x is not None] if len(results) > 1 and self.fixed_template(): sys.exit('ERROR: fixed output name but more than one file to download') 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 except (ValueError, KeyError), err: self.to_stderr('ERROR: invalid output template: %s' % str(err)) continue try: self.pmkdir(filename) except (OSError, IOError), err: self.to_stderr('ERROR: unable to create directories: %s' % str(err)) continue try: outstream = open(filename, 'wb') except (OSError, IOError), err: self.to_stderr('ERROR: unable to open for writing: %s' % str(err)) continue try: self._do_download(outstream, result['url']) outstream.close() except (OSError, IOError), err: self.to_stderr('ERROR: unable to write video data: %s' % str(err)) continue except (urllib2.URLError, httplib.HTTPException, socket.error), err: self.to_stderr('ERROR: unable to download video data: %s' % str(err)) continue break if not suitable_found: self.to_stderr('ERROR: no suitable InfoExtractor: %s' % url) def _do_download(self, stream, url): request = urllib2.Request(url, None, std_headers) data = urllib2.urlopen(request) data_len = data.info().get('Content-length', None) data_len_str = self.format_bytes(data_len) byte_counter = 0 block_size = 1024 start = time.time() while True: percent_str = self.calc_percent(byte_counter, data_len) eta_str = self.calc_eta(start, time.time(), data_len, byte_counter) speed_str = self.calc_speed(start, time.time(), byte_counter) self.to_stdout('\r[download] %s of %s at %s ETA %s' % (percent_str, data_len_str, speed_str, eta_str), skip_eol=True) 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) self.to_stdout('') if data_len is not None and str(byte_counter) != data_len: raise ValueError('Content too short: %s/%s bytes' % (byte_counter, data_len)) class InfoExtractor(object): """Information Extractor class. Information extractors are the classes that, given a URL, extract information from the video (or videos) the URL refers to. This information includes the real video URL, the video title and simplified title, author and others. It is returned in a list of dictionaries when calling its extract() method. It is a list because a URL can refer to more than one video (think of playlists). The dictionaries must include the following fields: id: Video identifier. url: Final video URL. uploader: Nickname of the video uploader. title: Literal title. stitle: Simplified title. ext: Video filename extension. Subclasses of this one should re-define the _real_initialize() and _real_extract() methods, as well as the suitable() static method. Probably, they should also be instantiated and added to the main downloader. """ _ready = False _downloader = None def __init__(self, downloader=None): """Constructor. Receives an optional downloader.""" self._ready = False self.set_downloader(downloader) @staticmethod def suitable(url): """Receives a URL and returns True if suitable for this IE.""" return True def initialize(self): """Initializes an instance (login, etc).""" if not self._ready: self._real_initialize() self._ready = True def extract(self, url): """Extracts URL information and returns it in list of dicts.""" self.initialize() return self._real_extract(url) def set_downloader(self, downloader): """Sets the downloader for this IE.""" self._downloader = downloader def to_stdout(self, message): if self._downloader is None or not self._downloader.get_params().get('quiet', False): print message def to_stderr(self, message): sys.stderr.write('%s\n' % message) def _real_initialize(self): """Real initialization process. Redefine in subclasses.""" pass def _real_extract(self, url): """Real extraction process. Redefine in subclasses.""" pass class YoutubeIE(InfoExtractor): """Information extractor for youtube.com.""" _LOGIN_URL = 'http://www.youtube.com/login?next=/' _AGE_URL = 'http://www.youtube.com/verify_age?next_url=/' _NETRC_MACHINE = 'youtube' def _real_initialize(self): if self._downloader is None: return username = None password = None downloader_params = self._downloader.get_params() # Attempt to use provided username and password or .netrc data if downloader_params.get('username', None) is not None: username = downloader_params['username'] password = downloader_params['password'] elif downloader_params.get('usenetrc', False): try: info = netrc.netrc().authenticators(self._NETRC_MACHINE) if info is not None: username = info[0] password = info[2] else: raise netrc.NetrcParseError('No authenticators for %s' % self._NETRC_MACHINE) except (IOError, netrc.NetrcParseError), err: self.to_stderr('WARNING: parsing .netrc: %s' % str(err)) return if username is None: return # Log in login_form = { 'current_form': 'loginForm', 'next': '/', 'action_login': 'Log In', 'username': username, 'password': password, } request = urllib2.Request(self._LOGIN_URL, urllib.urlencode(login_form), std_headers) try: self.to_stdout('[youtube] Logging in') login_results = urllib2.urlopen(request).read() if re.search(r'(?i)