三、wss连接B站弹幕

环境

pip install ws4py
from ws4py.client.threadedclient import websocketclient

一、websocket协议

1. 先建立连接 wss://broadcastlv.chat.bilibili.com/sub
2. 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"
   }
3. 每隔一段时间发送心跳包
4. 接收响应
   响应由头部和数据组成
   
   
5. 解析响应得到数据
6. 注册事件分发事件

二、工具层 utils.py

1. 定时器类
   可取消
2. 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

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

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()