3、wss鏈接B站彈幕

環境

pip install ws4py
from ws4py.client.threadedclient import WebSocketClient

1、websocket協議

1. 先創建鏈接 wss://broadcastlv.chat.bilibili.com/sub
2. 發送登陸包
   {
   "uid": 0表示未登陸，不然爲用戶ID,
   "roomid": 房間ID,
   "protover": 1,
   "platform": "web",
   "clientver": "1.4.0"
   }
3. 每隔一段時間發送心跳包
4. 接收響應
   響應由頭部和數據組成
   
   
5. 解析響應獲得數據
6. 註冊事件分發事件

2、工具層 utils.py

1. 定時器類
   可取消
2. 事件類
   註冊事件 （可重複）
   分發事件
   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))

3、服務層 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 登陸數據包
        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 心跳數據包
        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)

4、測試代碼

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()