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srv.go
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srv.go
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package wsrv
import (
"encoding/json"
"fmt"
"runtime/debug"
"sync"
"time"
"github.com/go-eyas/toolkit/util"
"github.com/go-eyas/toolkit/websocket"
)
// WebsocketServer 服务器
type WebsocketServer struct {
Engine *websocket.WS
Config *websocket.Config
logger websocket.LoggerI
routes map[string][]WSHandler // 路由
Session map[uint64]map[string]interface{} // map[sid]SessionData
heartbeat *sync.Map // 心跳
// requestMiddlewares []WSHandler // 请求中间件
// responseMiddlewares []WSHandler // 响应中间件
handlerMiddlewares []WSHandler // 中间件
}
// WSHandler 请求处理器
type WSHandler func(*Context)
var sessionMu sync.Mutex
// New 新建服务器实例
func New(conf *websocket.Config) *WebsocketServer {
if conf.Logger == nil {
conf.Logger = websocket.EmptyLogger
}
if conf.MsgType == 0 {
conf.MsgType = websocket.BinaryMessage
}
ws := websocket.New(conf)
server := &WebsocketServer{
Config: conf,
logger: conf.Logger,
Engine: ws,
routes: make(map[string][]WSHandler),
Session: make(map[uint64]map[string]interface{}),
heartbeat: &sync.Map{},
handlerMiddlewares: make([]WSHandler, 0),
// requestMiddlewares: make([]WSHandler, 0),
// responseMiddlewares: make([]WSHandler, 0),
}
ws.HandleClose(server.onClose)
ws.HandleCreate(server.onCreate)
go server.receive()
go server.checkHeartbeat()
return server
}
func (ws *WebsocketServer) receive() {
ch := ws.Engine.Receive()
for {
req := <-ch
go func(req *websocket.Message) {
ws.heartbeat.Store(req.SID, time.Now().Unix())
// 心跳包
if len(req.Payload) == 0 {
return
}
ctx := &Context{
SessionID: req.SID,
Socket: req.Socket,
RawMessage: req,
Engine: ws.Engine,
Payload: req.Payload,
Request: &WSRequest{},
Server: ws,
logger: ws.logger,
}
sessionMu.Lock()
vals, ok := ws.Session[req.SID]
if !ok {
ws.Session[req.SID] = make(map[string]interface{})
vals = ws.Session[req.SID]
}
sessionMu.Unlock()
ctx.Values = vals
ctx.logger.Infof("[WS] <-- RECV CMD=%s data=%s", ctx.CMD, string(ctx.Payload))
err := json.Unmarshal(ctx.Payload, ctx.Request)
if err != nil {
ctx.logger.Errorf("WS request json parse error: %v", err)
return
}
ctx.CMD = ctx.Request.CMD
ctx.Seqno = ctx.Request.Seqno
ctx.Response = &WSResponse{
CMD: ctx.Request.CMD,
Seqno: ctx.Request.Seqno,
Status: -1,
Msg: "not implement",
Data: map[string]interface{}{},
}
defer func() {
if err := recover(); err != nil {
ws.logger.Errorf("%v", err)
debug.PrintStack()
r := util.ParseError(err)
ctx.Response.Status = r.Status
ctx.Response.Msg = r.Msg
ctx.Response.Data = r.Data
}
ctx.writeResponse()
}()
handlers := append([]WSHandler{}, ws.handlerMiddlewares...)
handler, ok := ws.routes[ctx.CMD]
if ok {
handlers = append(handlers, handler...)
}
ctx.handlers = handlers
ctx.handlerIndex = -1
for !ctx.isAbort && ctx.handlerIndex < len(ctx.handlers) {
ctx.Next()
}
// for _, mdl := range ws.requestMiddlewares {
// mdl(ctx)
// if ctx.isAbort {
// break
// }
// }
// if !ctx.isAbort {
// handler, ok := ws.routes[ctx.CMD]
// if !ok {
// return
// } else {
// ctx.Response.Status = 1
// ctx.Response.Msg = "empty implement"
// }
// if !ctx.isAbort {
// for _, h := range handler {
// h(ctx)
// if ctx.isAbort {
// break
// }
// }
// }
// }
//
// for _, mdl := range ws.responseMiddlewares {
// mdl(ctx)
// if ctx.isAbort {
// break
// }
// }
}(req)
}
}
// // UseRequest 请求中间件
// func (ws *WebsocketServer) UseRequest(h WSHandler) {
// ws.requestMiddlewares = append(ws.requestMiddlewares, h)
// }
//
// // UseResponse 响应中间件
// func (ws *WebsocketServer) UseResponse(h WSHandler) {
// ws.responseMiddlewares = append(ws.responseMiddlewares, h)
// }
// 处理器中间件
func (srv *WebsocketServer) Use(h ...WSHandler) {
srv.handlerMiddlewares = append(srv.handlerMiddlewares, h...)
}
// Handle 注册 CMD 路由监听器
func (ws *WebsocketServer) Handle(cmd string, handlers ...WSHandler) {
h, ok := ws.routes[cmd]
if !ok {
h = handlers
} else {
h = append(h, handlers...)
}
ws.routes[cmd] = h
}
// Push 服务器推送消息到客户端
func (ws *WebsocketServer) Push(sid uint64, data *WSResponse) error {
conn, ok := ws.Engine.Clients[sid]
if !ok {
return fmt.Errorf("sid=%d is invalid", sid)
}
if data.Seqno == "" {
data.Seqno = util.RandomStr(8)
}
if data.Status == 0 && data.Msg == "" {
data.Msg = "ok"
}
payload, err := json.Marshal(data)
if err != nil {
return err
}
return conn.Send(&websocket.Message{
SID: sid,
Payload: payload,
Socket: conn,
MsgType: ws.Config.MsgType,
})
}
// Destroy 销毁清理连接
func (ws *WebsocketServer) Destroy(sid uint64) {
conn, ok := ws.Engine.Clients[sid]
if ok {
conn.Destroy()
}
ws.heartbeat.Delete(sid)
sessionMu.Lock()
delete(ws.Session, sid)
sessionMu.Unlock()
}
func (ws *WebsocketServer) onCreate(conn *websocket.Conn) {
sid := conn.ID
ws.heartbeat.Store(sid, time.Now().Unix())
sessionMu.Lock()
ws.Session[sid] = make(map[string]interface{})
sessionMu.Unlock()
}
func (ws *WebsocketServer) onClose(conn *websocket.Conn) {
sid := conn.ID
ws.Destroy(sid)
}
func (ws *WebsocketServer) checkHeartbeat() {
for {
time.Sleep(time.Second)
now := time.Now().Unix() - 30
ws.heartbeat.Range(func(key, val interface{}) bool {
sid, ok := key.(uint64)
if !ok {
return true
}
hbTime, ok := val.(int64)
if !ok {
return true
}
if hbTime < now {
go ws.Destroy(sid)
}
return true
})
}
}