# coding: utf-8
-import collections
import errno
import io
import itertools
import json
import os.path
import re
-import struct
import traceback
-import zlib
from .common import InfoExtractor, SearchInfoExtractor
from .subtitles import SubtitlesInfoExtractor
from ..jsinterp import JSInterpreter
+from ..swfinterp import SWFInterpreter
from ..utils import (
compat_chr,
compat_parse_qs,
"""Indicate the download will use the RTMP protocol."""
self.to_screen(u'RTMP download detected')
- def _extract_signature_function(self, video_id, player_url, slen):
- id_m = re.match(r'.*-(?P<id>[a-zA-Z0-9_-]+)\.(?P<ext>[a-z]+)$',
- player_url)
+ def _signature_cache_id(self, example_sig):
+ """ Return a string representation of a signature """
+ return u'.'.join(compat_str(len(part)) for part in example_sig.split('.'))
+
+ def _extract_signature_function(self, video_id, player_url, example_sig):
+ id_m = re.match(
+ r'.*-(?P<id>[a-zA-Z0-9_-]+)(?:/watch_as3|/html5player)?\.(?P<ext>[a-z]+)$',
+ player_url)
+ if not id_m:
+ raise ExtractorError('Cannot identify player %r' % player_url)
player_type = id_m.group('ext')
player_id = id_m.group('id')
# Read from filesystem cache
- func_id = '%s_%s_%d' % (player_type, player_id, slen)
+ func_id = '%s_%s_%s' % (
+ player_type, player_id, self._signature_cache_id(example_sig))
assert os.path.basename(func_id) == func_id
cache_dir = get_cachedir(self._downloader.params)
if cache_enabled:
try:
- test_string = u''.join(map(compat_chr, range(slen)))
+ test_string = u''.join(map(compat_chr, range(len(example_sig))))
cache_res = res(test_string)
cache_spec = [ord(c) for c in cache_res]
try:
return res
- def _print_sig_code(self, func, slen):
+ def _print_sig_code(self, func, example_sig):
def gen_sig_code(idxs):
def _genslice(start, end, step):
starts = u'' if start == 0 else str(start)
else:
yield _genslice(start, i, step)
- test_string = u''.join(map(compat_chr, range(slen)))
+ test_string = u''.join(map(compat_chr, range(len(example_sig))))
cache_res = func(test_string)
cache_spec = [ord(c) for c in cache_res]
expr_code = u' + '.join(gen_sig_code(cache_spec))
- code = u'if len(s) == %d:\n return %s\n' % (slen, expr_code)
+ signature_id_tuple = '(%s)' % (
+ ', '.join(compat_str(len(p)) for p in example_sig.split('.')))
+ code = (u'if tuple(len(p) for p in s.split(\'.\')) == %s:\n'
+ u' return %s\n') % (signature_id_tuple, expr_code)
self.to_screen(u'Extracted signature function:\n' + code)
def _parse_sig_js(self, jscode):
return lambda s: initial_function([s])
def _parse_sig_swf(self, file_contents):
- if file_contents[1:3] != b'WS':
- raise ExtractorError(
- u'Not an SWF file; header is %r' % file_contents[:3])
- if file_contents[:1] == b'C':
- content = zlib.decompress(file_contents[8:])
- else:
- raise NotImplementedError(u'Unsupported compression format %r' %
- file_contents[:1])
-
- def extract_tags(content):
- pos = 0
- while pos < len(content):
- header16 = struct.unpack('<H', content[pos:pos+2])[0]
- pos += 2
- tag_code = header16 >> 6
- tag_len = header16 & 0x3f
- if tag_len == 0x3f:
- tag_len = struct.unpack('<I', content[pos:pos+4])[0]
- pos += 4
- assert pos+tag_len <= len(content)
- yield (tag_code, content[pos:pos+tag_len])
- pos += tag_len
-
- code_tag = next(tag
- for tag_code, tag in extract_tags(content)
- if tag_code == 82)
- p = code_tag.index(b'\0', 4) + 1
- code_reader = io.BytesIO(code_tag[p:])
-
- # Parse ABC (AVM2 ByteCode)
- def read_int(reader=None):
- if reader is None:
- reader = code_reader
- res = 0
- shift = 0
- for _ in range(5):
- buf = reader.read(1)
- assert len(buf) == 1
- b = struct.unpack('<B', buf)[0]
- res = res | ((b & 0x7f) << shift)
- if b & 0x80 == 0:
- break
- shift += 7
- return res
-
- def u30(reader=None):
- res = read_int(reader)
- assert res & 0xf0000000 == 0
- return res
- u32 = read_int
-
- def s32(reader=None):
- v = read_int(reader)
- if v & 0x80000000 != 0:
- v = - ((v ^ 0xffffffff) + 1)
- return v
-
- def read_string(reader=None):
- if reader is None:
- reader = code_reader
- slen = u30(reader)
- resb = reader.read(slen)
- assert len(resb) == slen
- return resb.decode('utf-8')
-
- def read_bytes(count, reader=None):
- if reader is None:
- reader = code_reader
- resb = reader.read(count)
- assert len(resb) == count
- return resb
-
- def read_byte(reader=None):
- resb = read_bytes(1, reader=reader)
- res = struct.unpack('<B', resb)[0]
- return res
-
- # minor_version + major_version
- read_bytes(2 + 2)
-
- # Constant pool
- int_count = u30()
- for _c in range(1, int_count):
- s32()
- uint_count = u30()
- for _c in range(1, uint_count):
- u32()
- double_count = u30()
- read_bytes((double_count-1) * 8)
- string_count = u30()
- constant_strings = [u'']
- for _c in range(1, string_count):
- s = read_string()
- constant_strings.append(s)
- namespace_count = u30()
- for _c in range(1, namespace_count):
- read_bytes(1) # kind
- u30() # name
- ns_set_count = u30()
- for _c in range(1, ns_set_count):
- count = u30()
- for _c2 in range(count):
- u30()
- multiname_count = u30()
- MULTINAME_SIZES = {
- 0x07: 2, # QName
- 0x0d: 2, # QNameA
- 0x0f: 1, # RTQName
- 0x10: 1, # RTQNameA
- 0x11: 0, # RTQNameL
- 0x12: 0, # RTQNameLA
- 0x09: 2, # Multiname
- 0x0e: 2, # MultinameA
- 0x1b: 1, # MultinameL
- 0x1c: 1, # MultinameLA
- }
- multinames = [u'']
- for _c in range(1, multiname_count):
- kind = u30()
- assert kind in MULTINAME_SIZES, u'Invalid multiname kind %r' % kind
- if kind == 0x07:
- u30() # namespace_idx
- name_idx = u30()
- multinames.append(constant_strings[name_idx])
- else:
- multinames.append('[MULTINAME kind: %d]' % kind)
- for _c2 in range(MULTINAME_SIZES[kind]):
- u30()
-
- # Methods
- method_count = u30()
- MethodInfo = collections.namedtuple(
- 'MethodInfo',
- ['NEED_ARGUMENTS', 'NEED_REST'])
- method_infos = []
- for method_id in range(method_count):
- param_count = u30()
- u30() # return type
- for _ in range(param_count):
- u30() # param type
- u30() # name index (always 0 for youtube)
- flags = read_byte()
- if flags & 0x08 != 0:
- # Options present
- option_count = u30()
- for c in range(option_count):
- u30() # val
- read_bytes(1) # kind
- if flags & 0x80 != 0:
- # Param names present
- for _ in range(param_count):
- u30() # param name
- mi = MethodInfo(flags & 0x01 != 0, flags & 0x04 != 0)
- method_infos.append(mi)
-
- # Metadata
- metadata_count = u30()
- for _c in range(metadata_count):
- u30() # name
- item_count = u30()
- for _c2 in range(item_count):
- u30() # key
- u30() # value
-
- def parse_traits_info():
- trait_name_idx = u30()
- kind_full = read_byte()
- kind = kind_full & 0x0f
- attrs = kind_full >> 4
- methods = {}
- if kind in [0x00, 0x06]: # Slot or Const
- u30() # Slot id
- u30() # type_name_idx
- vindex = u30()
- if vindex != 0:
- read_byte() # vkind
- elif kind in [0x01, 0x02, 0x03]: # Method / Getter / Setter
- u30() # disp_id
- method_idx = u30()
- methods[multinames[trait_name_idx]] = method_idx
- elif kind == 0x04: # Class
- u30() # slot_id
- u30() # classi
- elif kind == 0x05: # Function
- u30() # slot_id
- function_idx = u30()
- methods[function_idx] = multinames[trait_name_idx]
- else:
- raise ExtractorError(u'Unsupported trait kind %d' % kind)
-
- if attrs & 0x4 != 0: # Metadata present
- metadata_count = u30()
- for _c3 in range(metadata_count):
- u30() # metadata index
-
- return methods
-
- # Classes
+ swfi = SWFInterpreter(file_contents)
TARGET_CLASSNAME = u'SignatureDecipher'
- searched_idx = multinames.index(TARGET_CLASSNAME)
- searched_class_id = None
- class_count = u30()
- for class_id in range(class_count):
- name_idx = u30()
- if name_idx == searched_idx:
- # We found the class we're looking for!
- searched_class_id = class_id
- u30() # super_name idx
- flags = read_byte()
- if flags & 0x08 != 0: # Protected namespace is present
- u30() # protected_ns_idx
- intrf_count = u30()
- for _c2 in range(intrf_count):
- u30()
- u30() # iinit
- trait_count = u30()
- for _c2 in range(trait_count):
- parse_traits_info()
-
- if searched_class_id is None:
- raise ExtractorError(u'Target class %r not found' %
- TARGET_CLASSNAME)
-
- method_names = {}
- method_idxs = {}
- for class_id in range(class_count):
- u30() # cinit
- trait_count = u30()
- for _c2 in range(trait_count):
- trait_methods = parse_traits_info()
- if class_id == searched_class_id:
- method_names.update(trait_methods.items())
- method_idxs.update(dict(
- (idx, name)
- for name, idx in trait_methods.items()))
-
- # Scripts
- script_count = u30()
- for _c in range(script_count):
- u30() # init
- trait_count = u30()
- for _c2 in range(trait_count):
- parse_traits_info()
-
- # Method bodies
- method_body_count = u30()
- Method = collections.namedtuple('Method', ['code', 'local_count'])
- methods = {}
- for _c in range(method_body_count):
- method_idx = u30()
- u30() # max_stack
- local_count = u30()
- u30() # init_scope_depth
- u30() # max_scope_depth
- code_length = u30()
- code = read_bytes(code_length)
- if method_idx in method_idxs:
- m = Method(code, local_count)
- methods[method_idxs[method_idx]] = m
- exception_count = u30()
- for _c2 in range(exception_count):
- u30() # from
- u30() # to
- u30() # target
- u30() # exc_type
- u30() # var_name
- trait_count = u30()
- for _c2 in range(trait_count):
- parse_traits_info()
-
- assert p + code_reader.tell() == len(code_tag)
- assert len(methods) == len(method_idxs)
-
- method_pyfunctions = {}
-
- def extract_function(func_name):
- if func_name in method_pyfunctions:
- return method_pyfunctions[func_name]
- if func_name not in methods:
- raise ExtractorError(u'Cannot find function %r' % func_name)
- m = methods[func_name]
-
- def resfunc(args):
- registers = ['(this)'] + list(args) + [None] * m.local_count
- stack = []
- coder = io.BytesIO(m.code)
- while True:
- opcode = struct.unpack('!B', coder.read(1))[0]
- if opcode == 36: # pushbyte
- v = struct.unpack('!B', coder.read(1))[0]
- stack.append(v)
- elif opcode == 44: # pushstring
- idx = u30(coder)
- stack.append(constant_strings[idx])
- elif opcode == 48: # pushscope
- # We don't implement the scope register, so we'll just
- # ignore the popped value
- stack.pop()
- elif opcode == 70: # callproperty
- index = u30(coder)
- mname = multinames[index]
- arg_count = u30(coder)
- args = list(reversed(
- [stack.pop() for _ in range(arg_count)]))
- obj = stack.pop()
- if mname == u'split':
- assert len(args) == 1
- assert isinstance(args[0], compat_str)
- assert isinstance(obj, compat_str)
- if args[0] == u'':
- res = list(obj)
- else:
- res = obj.split(args[0])
- stack.append(res)
- elif mname == u'slice':
- assert len(args) == 1
- assert isinstance(args[0], int)
- assert isinstance(obj, list)
- res = obj[args[0]:]
- stack.append(res)
- elif mname == u'join':
- assert len(args) == 1
- assert isinstance(args[0], compat_str)
- assert isinstance(obj, list)
- res = args[0].join(obj)
- stack.append(res)
- elif mname in method_pyfunctions:
- stack.append(method_pyfunctions[mname](args))
- else:
- raise NotImplementedError(
- u'Unsupported property %r on %r'
- % (mname, obj))
- elif opcode == 72: # returnvalue
- res = stack.pop()
- return res
- elif opcode == 79: # callpropvoid
- index = u30(coder)
- mname = multinames[index]
- arg_count = u30(coder)
- args = list(reversed(
- [stack.pop() for _ in range(arg_count)]))
- obj = stack.pop()
- if mname == u'reverse':
- assert isinstance(obj, list)
- obj.reverse()
- else:
- raise NotImplementedError(
- u'Unsupported (void) property %r on %r'
- % (mname, obj))
- elif opcode == 93: # findpropstrict
- index = u30(coder)
- mname = multinames[index]
- res = extract_function(mname)
- stack.append(res)
- elif opcode == 97: # setproperty
- index = u30(coder)
- value = stack.pop()
- idx = stack.pop()
- obj = stack.pop()
- assert isinstance(obj, list)
- assert isinstance(idx, int)
- obj[idx] = value
- elif opcode == 98: # getlocal
- index = u30(coder)
- stack.append(registers[index])
- elif opcode == 99: # setlocal
- index = u30(coder)
- value = stack.pop()
- registers[index] = value
- elif opcode == 102: # getproperty
- index = u30(coder)
- pname = multinames[index]
- if pname == u'length':
- obj = stack.pop()
- assert isinstance(obj, list)
- stack.append(len(obj))
- else: # Assume attribute access
- idx = stack.pop()
- assert isinstance(idx, int)
- obj = stack.pop()
- assert isinstance(obj, list)
- stack.append(obj[idx])
- elif opcode == 128: # coerce
- u30(coder)
- elif opcode == 133: # coerce_s
- assert isinstance(stack[-1], (type(None), compat_str))
- elif opcode == 164: # modulo
- value2 = stack.pop()
- value1 = stack.pop()
- res = value1 % value2
- stack.append(res)
- elif opcode == 208: # getlocal_0
- stack.append(registers[0])
- elif opcode == 209: # getlocal_1
- stack.append(registers[1])
- elif opcode == 210: # getlocal_2
- stack.append(registers[2])
- elif opcode == 211: # getlocal_3
- stack.append(registers[3])
- elif opcode == 214: # setlocal_2
- registers[2] = stack.pop()
- elif opcode == 215: # setlocal_3
- registers[3] = stack.pop()
- else:
- raise NotImplementedError(
- u'Unsupported opcode %d' % opcode)
-
- method_pyfunctions[func_name] = resfunc
- return resfunc
-
- initial_function = extract_function(u'decipher')
+ searched_class = swfi.extract_class(TARGET_CLASSNAME)
+ initial_function = swfi.extract_function(searched_class, u'decipher')
return lambda s: initial_function([s])
def _decrypt_signature(self, s, video_id, player_url, age_gate=False):
if player_url.startswith(u'//'):
player_url = u'https:' + player_url
try:
- player_id = (player_url, len(s))
+ player_id = (player_url, self._signature_cache_id(s))
if player_id not in self._player_cache:
func = self._extract_signature_function(
- video_id, player_url, len(s)
+ video_id, player_url, s
)
self._player_cache[player_id] = func
func = self._player_cache[player_id]
if self._downloader.params.get('youtube_print_sig_code'):
- self._print_sig_code(func, len(s))
+ self._print_sig_code(func, s)
return func(s)
except Exception as e:
tb = traceback.format_exc()
raise ExtractorError(
- u'Automatic signature extraction failed: ' + tb, cause=e)
+ u'Signature extraction failed: ' + tb, cause=e)
def _get_available_subtitles(self, video_id, webpage):
try:
age_gate = True
# We simulate the access to the video from www.youtube.com/v/{video_id}
# this can be viewed without login into Youtube
- data = compat_urllib_parse.urlencode({'video_id': video_id,
- 'el': 'player_embedded',
- 'gl': 'US',
- 'hl': 'en',
- 'eurl': 'https://youtube.googleapis.com/v/' + video_id,
- 'asv': 3,
- 'sts':'1588',
- })
+ data = compat_urllib_parse.urlencode({
+ 'video_id': video_id,
+ 'eurl': 'https://youtube.googleapis.com/v/' + video_id,
+ 'sts': self._search_regex(
+ r'"sts"\s*:\s*(\d+)', video_webpage, 'sts'),
+ })
video_info_url = proto + '://www.youtube.com/get_video_info?' + data
video_info_webpage = self._download_webpage(video_info_url, video_id,
note=False,
url_map = {}
for url_data_str in encoded_url_map.split(','):
url_data = compat_parse_qs(url_data_str)
- if 'itag' in url_data and 'url' in url_data:
- url = url_data['url'][0]
- if 'sig' in url_data:
- url += '&signature=' + url_data['sig'][0]
- elif 's' in url_data:
- encrypted_sig = url_data['s'][0]
- if self._downloader.params.get('verbose'):
- if age_gate:
- if player_url is None:
- player_version = 'unknown'
- else:
- player_version = self._search_regex(
- r'-(.+)\.swf$', player_url,
- u'flash player', fatal=False)
+ if 'itag' not in url_data or 'url' not in url_data:
+ continue
+ format_id = url_data['itag'][0]
+ url = url_data['url'][0]
+
+ if 'sig' in url_data:
+ url += '&signature=' + url_data['sig'][0]
+ elif 's' in url_data:
+ encrypted_sig = url_data['s'][0]
+
+ if not age_gate:
+ jsplayer_url_json = self._search_regex(
+ r'"assets":.+?"js":\s*("[^"]+")',
+ video_webpage, u'JS player URL')
+ player_url = json.loads(jsplayer_url_json)
+ if player_url is None:
+ player_url_json = self._search_regex(
+ r'ytplayer\.config.*?"url"\s*:\s*("[^"]+")',
+ video_webpage, u'age gate player URL')
+ player_url = json.loads(player_url_json)
+
+ if self._downloader.params.get('verbose'):
+ if player_url is None:
+ player_version = 'unknown'
+ player_desc = 'unknown'
+ else:
+ if player_url.endswith('swf'):
+ player_version = self._search_regex(
+ r'-(.+?)(?:/watch_as3)?\.swf$', player_url,
+ u'flash player', fatal=False)
player_desc = 'flash player %s' % player_version
else:
player_version = self._search_regex(
- r'html5player-(.+?)\.js', video_webpage,
+ r'html5player-([^/]+?)(?:/html5player)?\.js',
+ player_url,
'html5 player', fatal=False)
player_desc = u'html5 player %s' % player_version
- parts_sizes = u'.'.join(compat_str(len(part)) for part in encrypted_sig.split('.'))
- self.to_screen(u'encrypted signature length %d (%s), itag %s, %s' %
- (len(encrypted_sig), parts_sizes, url_data['itag'][0], player_desc))
-
- if not age_gate:
- jsplayer_url_json = self._search_regex(
- r'"assets":.+?"js":\s*("[^"]+")',
- video_webpage, u'JS player URL')
- player_url = json.loads(jsplayer_url_json)
-
- signature = self._decrypt_signature(
- encrypted_sig, video_id, player_url, age_gate)
- url += '&signature=' + signature
- if 'ratebypass' not in url:
- url += '&ratebypass=yes'
- url_map[url_data['itag'][0]] = url
+ parts_sizes = self._signature_cache_id(encrypted_sig)
+ self.to_screen(u'{%s} signature length %s, %s' %
+ (format_id, parts_sizes, player_desc))
+
+ signature = self._decrypt_signature(
+ encrypted_sig, video_id, player_url, age_gate)
+ url += '&signature=' + signature
+ if 'ratebypass' not in url:
+ url += '&ratebypass=yes'
+ url_map[format_id] = url
formats = _map_to_format_list(url_map)
elif video_info.get('hlsvp'):
manifest_url = video_info['hlsvp'][0]
Rapsys Git / youtubedl / blobdiff