601 lines
12 KiB
Go
601 lines
12 KiB
Go
package cmd
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import (
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"bufio"
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"encoding/json"
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"fmt"
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"github.com/go-basic/uuid"
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"unicode/utf8"
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//"github.com/go-basic/uuid"
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"log"
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"net"
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"os"
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"strconv"
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"strings"
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"sync"
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"time"
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)
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type Client struct {
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wlock sync.Mutex // write lock
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rlock sync.Mutex // read lock
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appname string // local appname
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addr string // host:port
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conn net.Conn // socket conn
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createTime time.Time // client create time
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groupid string // client group id
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subFun map[string]func(v string) // subscribe topic and callback function
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timerFun map[string]func() // subscribe timer amd callback function
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chSend chan []string // chan of send message
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chReceive chan []string // chan of receive message
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timerReceive chan []string // chan of timer
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lockFlag map[string]*Lock // chan of lock
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}
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type Lock struct {
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Key string // lock Key
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Uuid string // lock Uuid
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flagChan chan int //
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// starttime uint32 // lock start time
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// duration int // lock duration
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}
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func Create(appname string, addr string, groupid string) (*Client, error) {
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conn, err := net.Dial("tcp", addr)
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if err != nil {
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return &Client{}, err
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}
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client := Client{
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wlock: sync.Mutex{},
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rlock: sync.Mutex{},
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appname: appname,
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addr: addr,
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conn: conn,
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groupid: groupid,
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createTime: time.Now(),
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subFun: make(map[string]func(v string)),
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timerFun: make(map[string]func()),
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chSend: make(chan []string, 100),
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chReceive: make(chan []string, 100),
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timerReceive: make(chan []string, 100),
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lockFlag: make(map[string]*Lock),
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}
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client.send("groupid " + groupid)
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client.init()
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return &client, err
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}
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func (c *Client) reconn() (err error) {
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for n := 1; n < 10; n++ {
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conn, err := net.Dial("tcp", c.addr)
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if err != nil {
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log.Println("reconn", err)
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time.Sleep(time.Second * 3)
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continue
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} else if err == nil {
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c.conn = conn
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c.send("groupid " + c.groupid)
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go c.receive()
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// 重新订阅
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for topic, _ := range c.subFun {
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c.Subscribe(topic, nil)
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}
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for topic, _ := range c.timerFun {
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c.Timer(topic, nil)
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}
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break
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}
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}
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return
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}
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func (c *Client) init() {
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// 消费 topic 消息
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go func() {
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for {
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select {
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case vs := <-c.chReceive:
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fun := c.subFun[vs[1]]
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if fun == nil {
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log.Println("topic received, nothing to do", vs[1], vs[2])
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continue
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}
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fun(vs[2])
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case vs := <-c.timerReceive:
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fun := c.timerFun[vs[1]]
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if fun == nil {
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log.Println("timer received, nothing to do", vs[1])
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continue
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}
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fun()
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}
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}
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}()
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c.rpcInit()
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go c.receive()
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}
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/*
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// subscribe topic
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---
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subscribe x y z
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---
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*/
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func (c *Client) Subscribe(topic string, fun func(v string)) {
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c.send("subscribe " + topic)
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if fun != nil {
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c.wlock.Lock()
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defer c.wlock.Unlock()
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c.subFun[topic] = fun
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}
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}
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func (c *Client) Unsubscribe(topic string) {
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c.send("unsubscribe " + topic)
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delete(c.subFun, topic)
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}
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/*
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---
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ping
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---
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*/
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func (c *Client) ping() {
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c.send("ping")
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}
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//Publish -------------------------------------- pub-sub --------------------------------------
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/*
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send topic message :
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---
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*3
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$7
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message
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$8
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my-topic
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$24
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{username:xx,mobile:xxx}
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---
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*/
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func (c *Client) Publish(topic string, message string) error {
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return c.send("publish", topic, message)
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}
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func (c *Client) Broadcast(topic string, message string) error {
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return c.send("broadcast", topic, message)
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}
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func (c *Client) Delay(topic string, message string, delay int) error {
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return c.send("delay", topic, message, strconv.Itoa(delay))
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}
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/*
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Timer
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func (c *Client) Timer(topic string, expr string, fun func()) {
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c.timerFun[topic] = fun
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c.send("timer", topic, expr, "x")
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}*/
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func (c *Client) Timer(topic string, fun func()) {
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if fun != nil {
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c.timerFun[topic] = fun
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}
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c.send("timer", topic)
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}
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// send cmd
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func (c *Client) Cmd(cmd ...string) {
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if len(cmd) == 1 {
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c.send("cmd", cmd[0])
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} else if len(cmd) > 1 {
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cmdx := make([]string, 0)
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cmdx = append(cmdx, "cmd")
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cmdx = append(cmdx, cmd...)
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c.send(cmdx...)
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}
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}
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func (c *Client) Close() {
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c.conn.Close()
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}
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// Lock Key
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func (c *Client) Lock(key string, duration int) Lock {
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uuid := uuid.New()
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c.send("lock", key, uuid, strconv.Itoa(duration))
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lockChan := make(chan int, 2)
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go func() {
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c.wlock.Lock()
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defer c.wlock.Unlock()
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c.lockFlag[uuid] = &Lock{
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Key: key,
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Uuid: uuid,
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flagChan: lockChan,
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}
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}()
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select {
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case <-lockChan:
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log.Println("lock-ok", time.Now().UnixNano()/1e6, uuid)
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}
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return Lock{Key: key, Uuid: uuid}
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}
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func (c *Client) Unlock(l Lock) {
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c.send("unlock", l.Key, l.Uuid)
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delete(c.lockFlag, l.Uuid)
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}
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// -------------------------------------- rpc --------------------------------------
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var rpcMap = make(map[string]*Rpc)
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var rpcLock = sync.RWMutex{}
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func (c *Client) rpcInit() {
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// 添加 appname 主题订阅处理
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c.Subscribe(c.appname, func(v string) {
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log.Println("rpc back:", v)
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rpcLock.Lock()
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defer rpcLock.Unlock()
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result := RpcResult{}
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err := json.Unmarshal([]byte(v), &result)
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if err != nil {
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// 返回失败处理
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log.Println("rpc result parse error:", err)
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return
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}
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rpc := rpcMap[result.Ruk]
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if rpc == nil {
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return // 本地已无 rpc 请求等待，如:超时结束
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}
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rpc.RpcResult = result
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close(rpc.Ch) // 发送事件
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delete(rpcMap, result.Ruk)
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})
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}
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type Rpc struct {
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Ruk string `json:"ruk"`
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Topic string `json:"topic"`
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Value string `json:"value"`
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Ch chan int `json:"-"` //请求返回标记
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RpcResult RpcResult `json:"-"`
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}
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type RpcResult struct {
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Ruk string `json:"ruk"`
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Retcode int `json:"retcode"`
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Retinfo string `json:"retinfo"`
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Result string `json:"result"`
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}
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func (r Rpc) backTopic() string {
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return strings.Split(r.Ruk, "::")[0]
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}
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func (c Client) Rpc(topic string, message string, back func(res RpcResult)) {
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rpc := Rpc{
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Ruk: c.appname + "::" + uuid.New(),
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Topic: topic,
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Value: message,
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Ch: make(chan int, 0),
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}
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bytes, err := json.Marshal(&rpc)
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if err != nil {
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log.Println("rpc marshal error:", err)
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}
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log.Println("rpc call:", string(bytes[:]))
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c.Publish(topic, string(bytes[:]))
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rpcLock.Lock()
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rpcMap[rpc.Ruk] = &rpc
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rpcLock.Unlock()
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select {
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case <-rpc.Ch:
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// ch 事件（rpc 返回）
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case <-time.After(time.Second * 15):
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// rpc 超时
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x, _ := json.Marshal(rpc)
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log.Println("rpc timeout:", x)
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rpc.RpcResult = RpcResult{
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Retcode: 505,
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Retinfo: "请求超时",
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}
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}
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back(rpc.RpcResult)
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}
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// rpc subscribe
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func (c Client) RpcSubscribe(topic string, fun func(Rpc Rpc) RpcResult) {
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c.Subscribe(topic, func(v string) {
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rpc := Rpc{}
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err := json.Unmarshal([]byte(v), &rpc)
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if err != nil {
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return
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}
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result := fun(rpc)
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result.Ruk = rpc.Ruk
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res, _ := json.Marshal(result)
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c.Publish(rpc.backTopic(), string(res[:]))
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})
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}
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// --------------------------------------------------------------------------------
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/*func (c *Client) subscribes(topics ...string) error {
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if len(topics) == 0 {
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return nil
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}
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messages := "subscribe"
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for _, topic := range topics {
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messages += " " + topic
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}
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c.send(messages)
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return nil
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}*/
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/*
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send socket message :
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if len(vs) equal 1 will send message `vs[0] + "\r\n"`
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else if len(vs) gt 1 will send message `* + len(vs)+ "\r\n" +"$"+ len(vs[n])+ "\r\n" + vs[n] + "\r\n" ...`
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*/
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func (c *Client) send(vs ...string) (err error) {
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//chSend <- vs
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c.wlock.Lock()
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defer c.wlock.Unlock()
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a:
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if len(vs) == 1 {
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_, err = c.conn.Write([]byte(vs[0] + "\r\n"))
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} else if len(vs) > 1 {
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data := "*" + strconv.Itoa(len(vs)) + "\r\n"
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for _, v := range vs {
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data += "$" + strconv.Itoa(utf8.RuneCountInString(v)) + "\r\n"
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data += v + "\r\n"
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}
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_, err = c.conn.Write([]byte(data))
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}
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if err != nil {
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log.Println(err)
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time.Sleep(time.Second * 3)
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goto a
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}
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return err
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}
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func (c *Client) receive() {
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c.rlock.Lock()
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defer c.rlock.Unlock()
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r := bufio.NewReader(c.conn)
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for {
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v, _, err := r.ReadLine()
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if err != nil {
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log.Println("receive error and reconn: ", err)
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if err = c.reconn(); err == nil {
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r = bufio.NewReader(c.conn)
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} else {
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}
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time.Sleep(time.Second * 3)
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continue
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} else if len(v) == 0 {
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log.Println("receive empty")
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continue
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}
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switch string(v[0:1]) {
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case "*": // 订阅消息
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// 数据行数
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vlen, err := strconv.Atoi(string(v[1:]))
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if err != nil {
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log.Println("receive parse len error: ", err, string(v))
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continue
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}
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// 读取完整数据
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vs := make([]string, 0)
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for i := 0; i < vlen; i++ {
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r.ReadLine() // $x
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v, _, err = r.ReadLine()
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if err != nil {
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log.Println("receive parse v error: ", err)
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}
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vs = append(vs, string(v))
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}
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if len(vs) == 3 && strings.EqualFold(vs[0], "message") {
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if strings.EqualFold(vs[1], "lock") { // message lock Uuid
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go func() {
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log.Println("lock:" + vs[2])
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c.wlock.Lock()
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defer c.wlock.Unlock()
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if c.lockFlag[vs[2]] == nil {
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return
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}
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c.lockFlag[vs[2]].flagChan <- 0
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}()
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continue
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}
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c.chReceive <- vs
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continue
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}
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if len(vs) == 2 && strings.EqualFold(vs[0], "timer") {
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c.timerReceive <- vs
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continue
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}
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/*if len(vs) == 2 && strings.EqualFold(vs[0], "delay") {
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c.delayFun[vs[1]]()
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delete(c.delayFun, vs[1])
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continue
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}*/
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continue
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case "+": // +pong, +xxx
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if strings.EqualFold("+ping", string(v)) { // 心跳消息回复
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c.send("+pong")
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}
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case "-":
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fmt.Println("error:", string(v))
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case ":":
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}
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}
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}
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// -------------------------------------- k-v --------------------------------------
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/*
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*3
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$3
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set
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$n
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x
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$m
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xx
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*/
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func (c *Client) set(key string, value interface{}) error {
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return nil
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}
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func (c *Client) get(key string) string {
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return ""
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}
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// -------------------------------------- hm --------------------------------------
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// ==============================================================================
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var reconnect = 0
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// client 命令行程序
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func ClientRun(addr string) {
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conn, err := net.Dial("tcp", fmt.Sprintf("%s", addr))
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for {
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if err != nil {
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log.Println(err)
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time.Sleep(time.Second * 3)
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conn, err = net.Dial("tcp", fmt.Sprintf("%s", addr))
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continue
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}
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fmt.Println(fmt.Sprintf("had connected server: %s", addr))
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break
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}
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defer func() {
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if reconnect == 1 {
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conn.Close()
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ClientRun(addr)
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}
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}()
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go clientRead(conn)
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for {
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inReader := bufio.NewReader(os.Stdin)
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line, err := inReader.ReadString('\n')
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if err != nil {
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fmt.Println(err)
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return
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} else if reconnect == 1 {
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return
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}
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line = strings.Trim(line, "\r\n")
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line = strings.Trim(line, "\n")
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line = strings.Trim(line, " ")
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if strings.EqualFold(line, "") {
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continue
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} else if strings.EqualFold(line, ":exit") {
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fmt.Println("exit!")
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return
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}
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//fmt.Println("发送数据：" + line)
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line = strings.ReplaceAll(line, " ", "")
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parr := strings.Split(line, " ")
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conn.Write([]byte("*" + strconv.Itoa(len(parr)) + "\r\n"))
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for i := range parr {
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conn.Write([]byte("$" + strconv.Itoa(len(parr[i])) + "\r\n"))
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conn.Write([]byte(parr[i] + "\r\n"))
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}
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}
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}
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func clientRead(conn net.Conn) {
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defer func() {
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if r := recover(); r != nil {
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fmt.Println("Recovered:", r)
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}
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reconnect = 1
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}()
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reader := bufio.NewReader(conn)
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for {
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rcmd := make([]string, 0)
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line, _, err := reader.ReadLine()
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if err != nil {
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log.Println("connection error: ", err)
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return
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} else if len(line) == 0 {
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continue
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}
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switch string(line[:1]) {
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case "*":
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n, _ := strconv.Atoi(string(line[1:]))
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for i := 0; i < n; i++ {
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reader.ReadLine()
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v, _, _ := reader.ReadLine()
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rcmd = append(rcmd, string(v))
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}
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case "+":
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rcmd = append(rcmd, string(line))
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case "-":
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rcmd = append(rcmd, string(line))
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case ":":
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rcmd = append(rcmd, string(line))
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case "h":
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if strings.EqualFold(string(line), "help-start") {
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for {
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v, _, _ := reader.ReadLine()
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if strings.EqualFold(string(v), "help-end") {
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break
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}
|
||
rcmd = append(rcmd, string(v)+"\r\n")
|
||
}
|
||
}
|
||
default:
|
||
rcmd = append(rcmd, string(line))
|
||
}
|
||
|
||
fmt.Println(">", strings.Join(rcmd, " "))
|
||
}
|
||
}
|