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barrage.py
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# -*- coding: utf-8 -*-
"""
101: "SC_HEARTBEAT_ACK",
103: "SC_ERROR",
105: "SC_INFO",
300: "SC_ENTER_ROOM_ACK",
310: "SC_FEED_PUSH",
330: "SC_RED_PACK_FEED",
340: "SC_LIVE_WATCHING_LIST",
370: "SC_GUESS_OPENED",
371: "SC_GUESS_CLOSED",
412: "SC_RIDE_CHANGED",
441: "SC_BET_CHANGED",
442: "SC_BET_CLOSED"
"""
class MessageDecode:
def __init__(self, buf):
self.buf = buf
self.pos = 0
self.message = {}
def __len__(self):
return len(self.buf)
def int_(self):
res = 0
i = 0
while self.buf[self.pos] >= 128:
res = res | (127 & self.buf[self.pos]) << 7 * i
self.pos += 1
i += 1
res = res | self.buf[self.pos] << 7 * i
self.pos += 1
return res
@staticmethod
def hex_(n):
res = []
while n > 128:
res.append(int((n & 127) | 128))
n = n >> 7
res.append(int(n))
return res
def bytes(self):
e = self.int_()
if e + self.pos > len(self.buf):
raise Exception('长度不匹配')
res = self.buf[self.pos:e + self.pos]
self.pos += e
return res
def skip(self, e=None):
"""跳过多少字节"""
if e is None:
while self.pos < len(self.buf):
if 128 & self.buf[self.pos] == 0:
self.pos += 1
return
self.pos += 1
return
self.pos += e
if self.pos >= len(self.buf):
self.pos -= 1
def skipType(self, e):
if e == 0:
self.skip()
elif e == 1:
self.skip(8)
elif e == 2:
self.skip(self.int_())
elif e == 3:
while True:
e = 7 & self.int_()
if 4 != e:
self.skipType(e)
elif e == 5:
self.skip(4)
else:
raise Exception('跳过类型错误')
def decode(self):
"""只处理弹幕"""
length = len(self)
while self.pos < length:
t = self.int_()
tt = t >> 3
if tt == 1:
self.message['payloadType'] = self.int_()
if self.message['payloadType'] != 310: # 非弹幕
return False
elif tt == 2:
self.message['compressionType'] = self.int_()
elif tt == 3:
self.message['payload'] = self.bytes()
else:
self.skipType(t & 7)
return True
def string(self):
e = self.bytes()
n = len(e)
if n < 1:
return ""
s = []
t = 0
while t < n:
r = e[t]
t += 1
if r < 128:
s.append(r)
elif 191 < r < 224:
s.append((31 & r) << 6 | 63 & e[t])
t += 1
elif 239 < r < 365:
x = (7 & r) << 18 | (63 & e[t]) << 12
t += 1
y = (63 & e[t]) << 6
t += 1
z = 63 & e[t]
t += 1
r = (x | y | z) - 65536
s.append(55296 + (r >> 10))
s.append(56320 + (1023 & r))
else:
x = (15 & r) << 12
y = (63 & e[t]) << 6
t += 1
z = 63 & e[t]
t += 1
s.append(x | y | z)
string = ''
for w in s:
try:
string += unichr(w) # python2
except:
string += chr(w) # python3
return string
def user_info_decode(self, r, l):
c = self.pos + l
m = {}
while self.pos < c:
t = self.int_()
tt = t >> 3
if tt == 1:
m['principalId'] = self.string()
elif tt == 2:
m['userName'] = self.string()
elif tt == 3:
m['headUrl'] = self.string()
else:
self.skipType(t & 7)
return m
def web_like_feed_decode(self, r, l):
c = self.pos + l
m = {}
while self.pos < c:
t = self.int_()
tt = t >> 3
if tt == 1:
m['id'] = self.string()
elif tt == 2:
m['user'] = self.user_info_decode(self.buf, self.int_())
elif tt == 3:
m['sortRank'] = self.int_()
elif tt == 4:
m['deviceHash'] = self.string()
else:
self.skipType(t & 7)
return m
def comment_decode(self, r, l):
c = self.pos + l
m = {}
while self.pos < c:
t = self.int_()
tt = t >> 3
if tt == 1:
m['id'] = self.string()
elif tt == 2:
m['user'] = self.user_info_decode(self.buf, self.int_())
elif tt == 3:
m['content'] = self.string()
elif tt == 4:
m['deviceHash'] = self.string()
elif tt == 5:
m['sortRank'] = self.int_()
elif tt == 6:
m['color'] = self.string()
elif tt ==7:
m['showType']=self.int_()
else:
self.skipType(t & 7)
return m
def gift_decode(self, r, l):
c = self.pos + l
m = {}
while self.pos < c:
t = self.int_()
tt = t >> 3
if tt == 1:
m['id'] = self.string()
elif tt == 2:
m['user'] = self.user_info_decode(self.buf, self.int_())
elif tt == 3:
m['time'] = self.int_()
elif tt == 4:
m['giftId'] = self.int_()
elif tt == 5:
m['sortRank'] = self.int_()
elif tt == 6:
m['mergeKey'] = self.string()
elif tt == 7:
m['batchSize'] = self.int_()
elif tt == 8:
m['comboCount'] = self.int_()
elif tt == 9:
m['rank'] = self.int_()
elif tt == 10:
m['expireDuration'] = self.int_()
elif tt == 11:
m['clientTimestamp'] = self.int_()
elif tt == 12:
m['slotDisplayDuration'] = self.int_()
elif tt == 13:
m['starLevel'] = self.int_()
elif tt == 14:
m['styleType'] = self.int_()
elif tt == 15:
m['liveAssistantType'] = self.int_()
elif tt == 16:
m['deviceHash'] = self.string()
elif tt == 17:
m['danmakuDisplay'] = self.bool()
else:
self.skipType(t & 7)
return m
def feed_decode(self):
self.pos = 0
self.buf = self.message['payload']
length = len(self.buf)
while self.pos < length:
t = self.int_()
tt = t >> 3
if tt == 1:
self.message['displayWatchingCount'] = self.string()
# print("观看人数：" + self.message['displayWatchingCount'])
elif tt == 2:
self.message['displayLikeCount'] = self.string()
# print("点赞数：" + self.message['displayLikeCount'])
elif tt == 5:
if not self.message.get('user'):
self.message['user'] = []
self.message['user'].append(self.comment_decode(self.buf, self.int_()))
elif tt==6:
self.string()
elif tt==8:
self.web_like_feed_decode(self.buf, self.int_())
elif tt == 9: # 礼物
if not self.message.get('gift'):
self.message['gift'] = []
self.message['gift'].append(self.gift_decode(self.buf, self.int_()))