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Modify bytes combination

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This commit is contained in:
taizan-hokuto
2020-04-18 00:55:56 +09:00
parent 3243d69d7a
commit 84bae4ad2a
2 changed files with 101 additions and 94 deletions
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68
pytchat/paramgen/arcparam.py
View File

@@ -12,6 +12,7 @@ Author: taizan-hokuto (2019) @taizan205
ver 0.0.1 2019.10.05
'''
def _gen_vid(video_id):
"""generate video_id parameter.
Parameter
@@ -23,7 +24,7 @@ def _gen_vid(video_id):
bytes : base64 encoded video_id parameter.
"""
header_magic = b'\x0A\x0F\x1A\x0D\x0A'
header_id = video_id.encode()
header_id = video_id.encode()
header_sep_1 = b'\x1A\x13\xEA\xA8\xDD\xB9\x01\x0D\x0A\x0B'
header_terminator = b'\x20\x01'
@@ -40,42 +41,46 @@ def _gen_vid(video_id):
b64enc(reduce(lambda x, y: x+y, item)).decode()
).encode()
def _nval(val):
"""convert value to byte array"""
if val<0: raise ValueError
if val < 0:
raise ValueError
buf = b''
while val >> 7:
m = val & 0xFF | 0x80
buf += m.to_bytes(1,'big')
buf += m.to_bytes(1, 'big')
val >>= 7
buf += val.to_bytes(1,'big')
buf += val.to_bytes(1, 'big')
return buf
def _build(video_id, seektime, topchat_only):
switch_01 = b'\x04' if topchat_only else b'\x01'
if seektime < 0:
times =_nval(0)
switch = b'\x04'
elif seektime == 0:
times =_nval(1)
switch = b'\x03'
times = _nval(0)
switch = b'\x04'
elif seektime == 0:
times = _nval(1)
switch = b'\x03'
else:
times =_nval(int(seektime*1000000))
times = _nval(int(seektime*1000000))
switch = b'\x03'
parity = b'\x00'
header_magic= b'\xA2\x9D\xB0\xD3\x04'
sep_0 = b'\x1A'
vid = _gen_vid(video_id)
time_tag = b'\x28'
timestamp1 = times
sep_1 = b'\x30\x00\x38\x00\x40\x00\x48'
sep_2 = b'\x52\x1C\x08\x00\x10\x00\x18\x00\x20\x00'
chkstr = b'\x2A\x0E\x73\x74\x61\x74\x69\x63\x63\x68\x65\x63\x6B\x73\x75\x6D\x40'
sep_3 = b'\x00\x58\x03\x60'
sep_4 = b'\x68' + parity + b'\x72\x04\x08'
sep_5 = b'\x10' + parity + b'\x78\x00'
body = [
header_magic = b'\xA2\x9D\xB0\xD3\x04'
sep_0 = b'\x1A'
vid = _gen_vid(video_id)
time_tag = b'\x28'
timestamp1 = times
sep_1 = b'\x30\x00\x38\x00\x40\x00\x48'
sep_2 = b'\x52\x1C\x08\x00\x10\x00\x18\x00\x20\x00'
chkstr = b'\x2A\x0E\x73\x74\x61\x74\x69\x63\x63\x68\x65\x63\x6B\x73\x75\x6D\x40'
sep_3 = b'\x00\x58\x03\x60'
sep_4 = b'\x68' + parity + b'\x72\x04\x08'
sep_5 = b'\x10' + parity + b'\x78\x00'
body = b''.join([
sep_0,
_nval(len(vid)),
vid,
@@ -90,18 +95,17 @@ def _build(video_id, seektime, topchat_only):
sep_4,
switch_01,
sep_5
]
])
body = reduce(lambda x, y: x+y, body)
return urllib.parse.quote(
b64enc( header_magic +
_nval(len(body)) +
body
).decode()
)
return urllib.parse.quote(
b64enc(header_magic +
_nval(len(body)) +
body
).decode()
)
def getparam(video_id, seektime = 0, topchat_only = False):
def getparam(video_id, seektime=0, topchat_only=False):
'''
Parameter
---------

127
pytchat/paramgen/liveparam.py
View File

@@ -11,6 +11,8 @@ Author: taizan-hokuto (2019) @taizan205
ver 0.0.1 2019.10.05
'''
def _gen_vid(video_id):
"""generate video_id parameter.
Parameter
@@ -22,11 +24,11 @@ def _gen_vid(video_id):
byte[] : base64 encoded video_id parameter.
"""
header_magic = b'\x0A\x0F\x0A\x0D\x0A'
header_id = video_id.encode()
header_id = video_id.encode()
header_sep_1 = b'\x1A'
header_sep_2 = b'\x43\xAA\xB9\xC1\xBD\x01\x3D\x0A'
header_suburl = ('https://www.youtube.com/live_chat?v='
f'{video_id}&is_popout=1').encode()
f'{video_id}&is_popout=1').encode()
header_terminator = b'\x20\x02'
item = [
@@ -44,62 +46,66 @@ def _gen_vid(video_id):
b64enc(reduce(lambda x, y: x+y, item)).decode()
).encode()
def _tzparity(video_id,times):
t=0
for i,s in enumerate(video_id):
def _tzparity(video_id, times):
t = 0
for i, s in enumerate(video_id):
ss = ord(s)
if(ss % 2 == 0):
t += ss*(12-i)
else:
t ^= ss*i
return ((times^t) % 2).to_bytes(1,'big')
return ((times ^ t) % 2).to_bytes(1, 'big')
def _nval(val):
"""convert value to byte array"""
if val<0: raise ValueError
if val < 0:
raise ValueError
buf = b''
while val >> 7:
m = val & 0xFF | 0x80
buf += m.to_bytes(1,'big')
buf += m.to_bytes(1, 'big')
val >>= 7
buf += val.to_bytes(1,'big')
buf += val.to_bytes(1, 'big')
return buf
def _build(video_id, _ts1, _ts2, _ts3, _ts4, _ts5, topchat_only):
#_short_type2
# _short_type2
switch_01 = b'\x04' if topchat_only else b'\x01'
parity = _tzparity(video_id, _ts1^_ts2^_ts3^_ts4^_ts5)
parity = _tzparity(video_id, _ts1 ^ _ts2 ^ _ts3 ^ _ts4 ^ _ts5)
header_magic= b'\xD2\x87\xCC\xC8\x03'
sep_0 = b'\x1A'
vid = _gen_vid(video_id)
time_tag = b'\x28'
timestamp1 = _nval(_ts1)
sep_1 = b'\x30\x00\x38\x00\x40\x02\x4A'
un_len = b'\x2B'
sep_2 = b'\x08'+parity+b'\x10\x00\x18\x00\x20\x00'
chkstr = b'\x2A\x0E\x73\x74\x61\x74\x69\x63\x63\x68\x65\x63\x6B\x73\x75\x6D'
sep_3 = b'\x3A\x00\x40\x00\x4A'
sep_4_len = b'\x02'
sep_4 = b'\x08\x01'
ts_2_start = b'\x50'
timestamp2 = _nval(_ts2)
ts_2_end = b'\x58'
sep_5 = b'\x03'
ts_3_start = b'\x50'
timestamp3 = _nval(_ts3)
ts_3_end = b'\x58'
timestamp4 = _nval(_ts4)
sep_6 = b'\x68'
#switch
sep_7 = b'\x82\x01\x04\x08'
#switch
sep_8 = b'\x10\x00'
sep_9 = b'\x88\x01\x00\xA0\x01'
timestamp5 = _nval(_ts5)
header_magic = b'\xD2\x87\xCC\xC8\x03'
sep_0 = b'\x1A'
vid = _gen_vid(video_id)
time_tag = b'\x28'
timestamp1 = _nval(_ts1)
sep_1 = b'\x30\x00\x38\x00\x40\x02\x4A'
un_len = b'\x2B'
sep_2 = b'\x08'+parity+b'\x10\x00\x18\x00\x20\x00'
chkstr = b'\x2A\x0E\x73\x74\x61\x74\x69\x63\x63\x68\x65\x63\x6B\x73\x75\x6D'
sep_3 = b'\x3A\x00\x40\x00\x4A'
sep_4_len = b'\x02'
sep_4 = b'\x08\x01'
ts_2_start = b'\x50'
timestamp2 = _nval(_ts2)
ts_2_end = b'\x58'
sep_5 = b'\x03'
ts_3_start = b'\x50'
timestamp3 = _nval(_ts3)
ts_3_end = b'\x58'
timestamp4 = _nval(_ts4)
sep_6 = b'\x68'
# switch
sep_7 = b'\x82\x01\x04\x08'
# switch
sep_8 = b'\x10\x00'
sep_9 = b'\x88\x01\x00\xA0\x01'
timestamp5 = _nval(_ts5)
body = [
body = b''.join([
sep_0,
_nval(len(vid)),
vid,
@@ -121,37 +127,35 @@ def _build(video_id, _ts1, _ts2, _ts3, _ts4, _ts5, topchat_only):
ts_3_end,
timestamp4,
sep_6,
switch_01,#
switch_01,
sep_7,
switch_01,#
switch_01,
sep_8,
sep_9,
timestamp5
]
])
return urllib.parse.quote(
b64enc(header_magic +
_nval(len(body)) +
body
).decode()
)
body = reduce(lambda x, y: x+y, body)
return urllib.parse.quote(
b64enc( header_magic +
_nval(len(body)) +
body
).decode()
)
def _times(past_sec):
n = int(time.time())
_ts1= n - random.uniform(0,1*3)
_ts2= n - random.uniform(0.01,0.99)
_ts3= n - past_sec + random.uniform(0,1)
_ts4= n - random.uniform(10*60,60*60)
_ts5= n - random.uniform(0.01,0.99)
return list(map(lambda x:int(x*1000000),[_ts1,_ts2,_ts3,_ts4,_ts5]))
_ts1 = n - random.uniform(0, 1*3)
_ts2 = n - random.uniform(0.01, 0.99)
_ts3 = n - past_sec + random.uniform(0, 1)
_ts4 = n - random.uniform(10*60, 60*60)
_ts5 = n - random.uniform(0.01, 0.99)
return list(map(lambda x: int(x*1000000), [_ts1, _ts2, _ts3, _ts4, _ts5]))
def getparam(video_id, past_sec = 0, topchat_only = False):
def getparam(video_id, past_sec=0, topchat_only=False):
'''
Parameter
---------
@@ -160,5 +164,4 @@ def getparam(video_id, past_sec = 0, topchat_only = False):
topchat_only : bool
if True, fetch only 'top chat'
'''
return _build(video_id,*_times(past_sec),topchat_only)
return _build(video_id, *_times(past_sec), topchat_only)