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client.go
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client.go
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package main
import (
"bytes"
"encoding/binary"
"encoding/json"
"fmt"
"github.com/gorilla/websocket"
"github.com/pkg/errors"
"log"
"sync"
"time"
)
type BiliWsClientConfig struct {
Name string
Host string
Port int64
RoomId int64
AuthBody string
}
type BiliWsClient struct {
*websocket.Conn
conf *BiliWsClientConfig
dispather *protoDispather
decoder *DecodeManager
bufPool sync.Pool // TODO
sequenceId int32
closeFlag chan struct{}
authed bool
retryCnt int64
disconnecd bool
msgBuf chan *Proto
}
// NewBiliWsClient 新建一个ws请求头
func NewBiliWsClient(conf *BiliWsClientConfig) *BiliWsClient {
if conf == nil {
panic("[BiliWsClient | NewBiliWsClient] conf == nil")
}
c := &BiliWsClient{
conf: conf,
dispather: newMessageDispather(),
closeFlag: make(chan struct{}),
decoder: NewDecodeManager(),
msgBuf: make(chan *Proto, 1024),
}
var err error
wsAddr := fmt.Sprintf("ws://%s:%d/sub", c.conf.Host, c.conf.Port)
//wss连接
c.Conn, _, err = websocket.DefaultDialer.Dial(wsAddr, nil)
if err != nil {
log.Fatal("[BiliWsClient | NewBiliWsClient] connect err")
return nil
}
log.Println("[BiliWsClient | NewBiliWsClient] connect success")
//认证结果插入
c.registerProtoHandler(OP_AUTH_REPLY, c.authResp)
//心跳包插入
c.registerProtoHandler(OP_HEARTBEAT_REPLY, c.heartBeatResp)
//消息插入
c.registerProtoHandler(OP_SEND_SMS_REPLY, c.msgResp)
//发送认证
err = c.sendAuth(c.conf.AuthBody)
if err != nil {
log.Fatal("[BiliWsClient | NewBiliWsClient] sendAuth err:", err)
return nil
}
return c
}
// Run 运行协程
func (c *BiliWsClient) Run() {
wg := sync.WaitGroup{}
wg.Add(2)
go func() {
defer wg.Done()
c.doReadLoop()
}()
go func() {
defer wg.Done()
c.doEventLoop()
}()
wg.Done()
}
// 发送认证
func (c *BiliWsClient) sendAuth(authBody string) (err error) {
p := &Proto{
Operation: OP_AUTH,
Body: []byte(authBody),
}
return c.sendMsg(p)
}
// 心跳头部处理
func (c *BiliWsClient) sendHeartBeat() {
if !c.authed {
return
}
msg := &Proto{}
msg.Operation = OP_HEARTBEAT
msg.SequenceId = c.sequenceId
c.sequenceId++
err := c.sendMsg(msg)
if err != nil {
log.Fatal("[BiliWsClient | sendHeartBeat] err", err)
return
}
log.Println("[BiliWsClient | sendHeartBeat] seq:", msg.SequenceId)
}
func (c *BiliWsClient) registerProtoHandler(cmd int32, logic protoLogic) {
c.dispather.register(cmd, logic)
}
func (c *BiliWsClient) Close() {
}
// 认证头部处理
func (c *BiliWsClient) sendMsg(msg *Proto) (err error) {
dataBuff := &bytes.Buffer{}
packLen := int32(RawHeaderSize + len(msg.Body))
msg.HeaderLength = RawHeaderSize
binary.Write(dataBuff, binary.BigEndian, packLen)
binary.Write(dataBuff, binary.BigEndian, int16(RawHeaderSize))
binary.Write(dataBuff, binary.BigEndian, msg.Version)
binary.Write(dataBuff, binary.BigEndian, msg.Operation)
binary.Write(dataBuff, binary.BigEndian, msg.SequenceId)
binary.Write(dataBuff, binary.BigEndian, msg.Body)
err = c.Conn.WriteMessage(websocket.BinaryMessage, dataBuff.Bytes())
if err != nil {
err = errors.Wrapf(err, "[BiliWsClient | SendMsg] WriteMessage err")
return
}
return
}
// 读取返回消息
func (c *BiliWsClient) readMsg() {
retProto := &Proto{}
//读出返回消息存放buff中
_, buf, err := c.Conn.ReadMessage()
if err != nil {
retProto.ErrMsg = errors.Wrapf(err, "[BiliWsClient | ReadMsg] conn err")
return
}
//判断buff里面的长度是否小于16
if len(buf) < RawHeaderSize {
retProto.ErrMsg = errors.Wrapf(err, "[BiliWsClient | ReadMsg] buf:%d less", len(buf))
return
}
//此处可参考: https://open-live.bilibili.com/document/doc&tool/api/websocket.html#_1-%E5%8F%91%E9%80%81auth%E5%8C%85
//读整包长度
retProto.PacketLength = int32(binary.BigEndian.Uint32(buf[PackOffset:HeaderOffset]))
//读包头长度
retProto.HeaderLength = int16(binary.BigEndian.Uint16(buf[HeaderOffset:VerOffset]))
//读版本信息
retProto.Version = int16(binary.BigEndian.Uint16(buf[VerOffset:OperationOffset]))
//读消息类型
retProto.Operation = int32(binary.BigEndian.Uint32(buf[OperationOffset:SeqIdOffset]))
//保留字段
retProto.SequenceId = int32(binary.BigEndian.Uint32(buf[SeqIdOffset:]))
if retProto.PacketLength < 0 || retProto.PacketLength > MaxPackSize {
retProto.ErrMsg = errors.Wrapf(err, "[BiliWsClient | ReadMsg] PacketLength:%d err", retProto.PacketLength)
return
}
if retProto.HeaderLength != RawHeaderSize {
retProto.ErrMsg = errors.Wrapf(err, "[BiliWsClient | ReadMsg] HeaderLength:%d err", retProto.PacketLength)
return
}
//判断是否为压缩包
if bodyLen := int(retProto.PacketLength - int32(retProto.HeaderLength)); bodyLen > 0 {
retProto.Body = buf[retProto.HeaderLength:retProto.PacketLength]
} else {
retProto.ErrMsg = errors.Wrapf(err, "[BiliWsClient | ReadMsg] BodyLength:%d err", bodyLen)
return
}
//根据版本信息解码信息
retProto.BodyMuti, err = c.decoder.Decode(int64(retProto.Version), retProto.Body)
if len(retProto.BodyMuti) > 0 {
retProto.Body = retProto.BodyMuti[0]
}
c.msgBuf <- retProto
}
// 主计时器,查看解码好的数据
func (c *BiliWsClient) doEventLoop() {
ticker := time.NewTicker(time.Second * 5)
for {
select {
case p := <-c.msgBuf:
if p == nil {
log.Fatal("[BiliWsClient | ReadMsg] p == nil")
continue
}
if p.ErrMsg != nil {
log.Fatal("[BiliWsClient | ReadMsg] err:", p.ErrMsg)
continue
}
err := c.dispather.do(p)
if err != nil {
log.Fatal("[BiliWsClient | ReadMsg] dispather err:", err)
continue
}
case <-c.closeFlag:
goto exit
case <-ticker.C:
c.sendHeartBeat()
}
}
exit:
c.Close()
}
// 等待服务器返回消息
func (c *BiliWsClient) doReadLoop() {
for {
c.readMsg()
}
}
// 认证返回信息
func (c *BiliWsClient) authResp(msg *Proto) (err error) {
resp := &AuthRespParam{}
err = json.Unmarshal(msg.Body, resp)
if err != nil {
err = errors.Wrapf(err, "[BiliWsClient | AuthResp] Unmarshal err")
return
}
if resp.Code != 0 {
err = fmt.Errorf("[BiliWsClient | AuthResp] code:%d", resp.Code)
return
}
c.authed = true
log.Println("[BiliWsClient | AuthResp] auth success")
return
}
// 心跳包
func (c *BiliWsClient) heartBeatResp(msg *Proto) (err error) {
log.Println("[BiliWsClient | HeartBeatResp] recv HeartBeat resp", msg.Body)
return
}
// MsgResp 可以这里做回调
func (c *BiliWsClient) msgResp(msg *Proto) (err error) {
for index, cmd := range msg.BodyMuti {
log.Printf("[BiliWsClient | HeartBeatResp] recv MsgResp index:%d ver:%d cmd:%s", index, msg.Version, string(cmd))
}
return
}
type protoLogic func(p *Proto) (err error)
type protoDispather struct {
dispather map[int32]protoLogic
}
func newMessageDispather() *protoDispather {
return &protoDispather{
dispather: map[int32]protoLogic{},
}
}
func (m *protoDispather) register(Op int32, f protoLogic) {
if m.dispather[Op] != nil {
panic(fmt.Sprintf("[MessageDispather | Register] Op:%d repeated", Op))
}
m.dispather[Op] = f
}
func (m *protoDispather) do(p *Proto) (err error) {
f, exist := m.dispather[p.Operation]
if exist {
fmt.Println("proto:", p.Version)
err = f(p)
if err != nil {
errors.Wrapf(err, "[MessageDispather | Do] process err")
}
return
}
return fmt.Errorf("[MessageDispather | Do] Op:%d not found", p.Operation)
}