三、wss连接B站弹幕
2018-09-29 本文已影响0人
ouczbs
环境 ws4py+
pip install ws4py
from ws4py.client.threadedclient import WebSocketClient
一、websocket协议
- 先与wss://broadcastlv.chat.bilibili.com/sub建立连接
- 发送登录包
{
"uid": 0表示未登录，否则为用户ID,
"roomid": 房间ID,
"protover": 1,
"platform": "web",
"clientver": "1.4.0"
} - 每隔一段时间发送心跳包（30秒）
Python只有延迟功能threading.Timer(delay,fun)
需要自定义一个不断循环的定时器 -
接收响应
响应由头部和数据组成
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- 解析响应得到数据
这里有个细节 b站可能一次返回了好几帧数据
先解析操作码再由操作码解析数据段 - 把数据交给主程序去处理
需要自定义一个事件类
用来实现事件的注册on和分发功能emit
二、工具层 utils.py - 定时器类
可取消 - 事件类
注册事件 （可重复）
分发事件
取消事件
class Timer():
def __init__(self,delay,fun):
self.delay,self.f=delay,fun
self.t=threading.Timer(self.delay,self.fun)
self.t.start()
def fun(self):
if self.f:self.f()
self.t=threading.Timer(self.delay,self.fun)
self.t.start()
def cancel(self):
self.t.cancel()
print("threading cancel")
class Event():
def __init__(self):
self.map=[]
self.keys=[]
def index(self,k):
i=-1
for key in self.keys:
i+=1
if key==k:return i
return -1
def on(self,key,fun):
i=self.index(key)
if i==-1:
self.map.append({"key":key,"funs":[fun]})
self.keys.append(key)
else:
self.map[i]["funs"].append(fun)
def emit(self,key,data=None):
i=self.index(key)
if i==-1:
print("no regist event:"+str(key))
return
for f in self.map[i]["funs"]:f(data)
def rm(self,key,fun):
i=self.index(key)
if i==-1:
print("no regist event:"+str(key))
return
funs=self.map[i]["funs"]
for j in range(len(funs)):
if funs[j]==fun:funs[j]=None
self.map[i]["funs"]=list(filter(None,funs))
三、服务层 DanmuWS.py
opened(self) 连接建立后父类会自动调用
closed(self,code,reason) 连接关闭后父类会自动调用
需要进行断线重连
received_message(self,message) 接收到数据时会自动调用
在这里解析数据并分发给主程序处理
send(self,data)父类发送数据的方法
sendLoginPacket 发送登录包
sendHeartBeatPacket 发送心跳包
bind 绑定主程序处理数据和事件的函数
import threading
import json
import struct
from ws4py.client.threadedclient import WebSocketClient
from utils import Event,Timer
event=Event()
class DanmuWebSocket(WebSocketClient):
def __init__(self,info,serveraddress='wss://broadcastlv.chat.bilibili.com/sub'):
self.serveraddress=serveraddress
WebSocketClient.__init__(self,serveraddress)
DanmuWebSocket.event=event
DanmuWebSocket.headerLength=16
self.Info=info
def opened(self):
self.sendLoginPacket(self.Info['uid'],self.Info['roomid'],self.Info['protover'],self.Info['platform'],self.Info['clientver'])
self.sendHeartBeatPacket();
self.heartBeatHandler = Timer(20,self.sendHeartBeatPacket)
print("opened")
def delay_close(self):
dws=DanmuWebSocket(self.Info,self.serveraddress)
event.emit('reconnect',dws);
def closed(self, code, reason=None):
print("Closed", code, reason)
if hasattr(self,"heartBeatHandler"):self.heartBeatHandler.cancel();
if code == 1000: return
threading.Timer(5,self.delay_close).start()
print("Closed", code, reason)
def received_message(self, message):
position,length=0,len(message.data)-1
while position<length:
header_pack=struct.unpack(">IHHII",message.data[position:position+16])
length_pack=header_pack[0]
operation=header_pack[3]
if operation==3:
num=header_pack[1]+position
num=struct.unpack(">I",message.data[num:num+4])[0]
event.emit('heartbeat',num)
elif operation==5:
data=json.loads(message.data[position+16:position+length_pack])
event.emit('cmd',data)
#print("recv:"+data["cmd"])
else:
event.emit('login');
position+=length_pack
def sendData(self,data, protover = 1, operation = 2, sequence = 1):
if type(data)==dict:
data=json.dumps(data).encode()
elif type(data)==str:
data=data.encode()
header=struct.pack(">IHHII",DanmuWebSocket.headerLength+len(data),DanmuWebSocket.headerLength,protover,operation,sequence)
self.send(header+data)
def sendLoginPacket(self,uid, roomid, protover = 1, platform = 'web', clientver = '1.4.6'):
# Uint(4byte) + 00 10 + 00 01 + 00 00 00 07 + 00 00 00 01 + Data 登录数据包
data = {
'uid': int(uid),
'roomid': int(roomid),
'protover': protover,
'platform': platform,
'clientver': clientver
}
print("sendLoginPacket")
data=json.dumps(data)
data=data.replace(' ','')
self.sendData(data.encode(),1,7,1)
def sendHeartBeatPacket(self):
# Uint(4byte) + 00 10 + 00 01 + 00 00 00 02 + 00 00 00 01 + Data 心跳数据包
self.sendData(b'[object Object]', 1, 2, 1);
def bind(self,onreconnect=None,onlogin=None,onheartbeat=None,oncmd=None,onreceive =None):
if "cmd" in event.keys:return
if hasattr(onreconnect,"__call__"):event.on("reconnect",onreconnect)
if hasattr(onlogin,"__call__"):event.on("login",onlogin)
if hasattr(onheartbeat,"__call__"):event.on("heartbeat",onheartbeat)
if hasattr(oncmd,"__call__"):event.on("cmd",oncmd)
if hasattr(onreceive,"__call__"):event.on("receive",onreceive)
四、测试代码
利用前面写的二维码登录代码
登录上Bilibili获取个人uid
oncmd 处理弹幕数据
onlogin 连接成功时的处理函数
onreconnect 断线重连时调用更新ws
onheartbeat 处理服务器发送的直播间人气值
from server import Login
headers={
'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:62.0) Gecko/20100101 Firefox/62.0',
'Accept': 'application/json, text/plain, */*',
'Accept-Language': 'zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2',
'Accept-Encoding': 'gzip, deflate, br',
'Referer': 'https://live.bilibili.com/',
'Origin': 'https://live.bilibili.com',
'Connection': 'keep-alive'
}
s=session(headers,'cookie.txt')
login=Login(s)
while not login.isLogin():
login.get_vdcode()
login.loop_vdcode()
info={
"uid": login.info['uid'],
"roomid": 7603080,
"protover": 1,
"platform": "web",
"clientver": "1.4.0"
}
from DanmuWS import DanmuWebSocket
def oncmd(data):
cmd=data["cmd"]
if cmd=="SYS_MSG":
print(data)
elif cmd=="SPECIAL_GIFT":
print(data)
else:
print(data)
def onlogin(data):
print("login success")
def onreconnect(dws):
global ws
ws=dws
def onheartbeat(num):
print(num)
try:
ws = DanmuWebSocket(info,'wss://broadcastlv.chat.bilibili.com/sub')
ws.connect()
ws.bind(None,onlogin,onheartbeat,oncmd)
ws.run_forever()
except:
ws.close()
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