/
connection.go
274 lines (235 loc) · 5.63 KB
/
connection.go
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package znets
import (
"bytes"
"errors"
"golang.org/x/text/encoding/simplifiedchinese"
"golang.org/x/text/transform"
"io/ioutil"
"net"
"sync"
)
type HandleFunc func(*net.TCPConn, []byte, int) error
type Connection struct {
//连接的套接字
Conn *net.TCPConn
//连接的ID
ConnID uint32
//连接状态
isClosed bool
//写通道退出状态的channel
ExitChan chan bool
//当前连接的处理方法
Handles IHandler
//无缓冲的读写channel
dataChan chan []byte
//父server
server IServer
//保护属性
property map[string]interface{}
//保护锁
propertyLock sync.RWMutex
packProto IPack //协议解析
connWg *sync.WaitGroup //进程中协程连接同步等待,用于在需要结束进程时等待处理未完成连接
}
func NewConnection(server IServer, conn *net.TCPConn, id uint32, handler IHandler, wg *sync.WaitGroup) IConnection {
c := &Connection{
Conn: conn,
ConnID: id,
isClosed: false,
ExitChan: make(chan bool, 1),
Handles: handler,
dataChan: make(chan []byte),
server: server,
property: make(map[string]interface{}),
connWg: wg,
}
c.server.GetManager().Add(c)
return c
}
func (c *Connection) SetPackProto(proto IPack) {
c.packProto = proto
}
//主动踢掉连接
func (c *Connection) closeConn() {
err := c.Conn.SetLinger(-1)
if err != nil {
Log.Error("Error when setting linger:%s", err.Error())
return
}
//<-time.After(2 * time.Second)
c.Stop()
}
//发送数据处理
func (c *Connection) StartWriter() {
for {
select {
case data := <-c.dataChan:
//收到nil则关闭掉连接
if data == nil {
c.closeConn()
return
}
//读写channel有数据时
if _, err := c.Conn.Write(data); err != nil {
Log.Error("Send data err:%s", err.Error())
return
}
case <-c.ExitChan:
return
}
}
}
//收到数据处理
func (c *Connection) StartReader() {
defer c.Stop()
var recvBuff string
var currentPackageLength int
for {
var buff [65535]byte
n, err := c.Conn.Read(buff[:])
if err != nil {
Log.Error("read msg data err:%s", err.Error())
break
}
gBbuff, _ := GbToUtf8(buff[:n]) //通讯中有中文简单处理
recvBuff += string(gBbuff)
recvBuffLen := len(recvBuff)
if c.packProto != nil {
for recvBuff != "" {
var message string
currentPackageLength = c.packProto.Input(recvBuff) //解析数据输入分割
if currentPackageLength > 0 {
if currentPackageLength == recvBuffLen {
message = recvBuff
recvBuff = ""
recvBuffLen = 0
} else {
message = recvBuff[:currentPackageLength]
recvBuff = recvBuff[currentPackageLength:]
recvBuffLen -= currentPackageLength
}
message = string(c.packProto.UnPack([]byte(message)))
msg := &Message{
Data: []byte(message),
Length: uint32(currentPackageLength),
}
currentPackageLength = 0
//调用通知处理
rid := c.server.GetRid()
clientId := AddressToClientId(c)
req := NewRequest(c, msg, rid, clientId)
*(rid)++
c.Handles.SendToTasks(req)
} else {
break
}
}
continue
}
if recvBuff == "" {
continue
}
msg := &Message{
Data: []byte(recvBuff),
Length: uint32(len(recvBuff)),
}
recvBuff = ""
recvBuffLen = 0
//调用通知处理
rid := c.server.GetRid()
clientId := AddressToClientId(c)
req := NewRequest(c, msg, rid, clientId)
*(rid)++
c.Handles.SendToTasks(req)
}
}
//启动连接
func (c *Connection) Start() {
Log.Info("connection coming in, ConnID = %d, Addr = %s", c.ConnID, c.GetConn().RemoteAddr().String())
//启动读数据业务
go c.StartReader()
// 启动写数据业务
go c.StartWriter()
go c.server.runOnStart(c)
}
//关闭连接
func (c *Connection) Stop() {
Log.Info("connection close, ConnID = %d, Addr = %s", c.ConnID, c.GetConn().RemoteAddr().String())
if c.isClosed == true {
return
}
c.isClosed = true
c.server.runOnStop(c)
c.Conn.Close()
c.ExitChan <- true
close(c.ExitChan)
close(c.dataChan)
c.connWg.Done() //连接wg -1
c.server.GetManager().Del(c)
}
//获取当前连接绑定的conn
func (c *Connection) GetConn() *net.TCPConn {
return c.Conn
}
//获取当前连接的id
func (c *Connection) GetID() uint32 {
return c.ConnID
}
//获取远程客户端信息
func (c *Connection) RemoteAddr() net.Addr {
return c.Conn.RemoteAddr()
}
//发送数据
func (c *Connection) Send(data []byte) error {
if c.isClosed {
return errors.New("Connection closes")
}
if c.packProto != nil {
data = c.packProto.Pack(data)
}
data, _ = Utf8ToGb(data) //处理中文
c.dataChan <- data
return nil
}
//获取主sever
func (c *Connection) GetServer() IServer {
return c.server
}
//添加当前连接额外kye-value
func (c *Connection) SetProperty(key string, val interface{}) {
c.propertyLock.Lock()
defer c.propertyLock.Unlock()
c.property[key] = val
}
func (c *Connection) GetProperty(key string) (interface{}, error) {
c.propertyLock.RLock()
defer c.propertyLock.RUnlock()
if val, ok := c.property[key]; ok {
return val, nil
}
return nil, errors.New("No Property")
}
func (c *Connection) DelProperty(key string) {
c.propertyLock.Lock()
defer c.propertyLock.Unlock()
delete(c.property, key)
}
func (c *Connection) SetProtoPack(proto IPack) {
c.packProto = proto
}
func GbToUtf8(s []byte) ([]byte, error) {
reader := transform.NewReader(bytes.NewReader(s), simplifiedchinese.GBK.NewDecoder())
d, e := ioutil.ReadAll(reader)
if e != nil {
return nil, e
}
return d, nil
}
func Utf8ToGb(s []byte) ([]byte, error) {
reader := transform.NewReader(bytes.NewReader(s), simplifiedchinese.GBK.NewEncoder())
d, e := ioutil.ReadAll(reader)
if e != nil {
return nil, e
}
return d, nil
}