noticer: 发送邮件通知

bin/web/server.go

@@ -2,6 +2,7 @@ package main
 
 import (
 	"net"
+	"time"
 
 	"github.com/cockroachdb/cmux"
 
@@ -33,6 +34,13 @@ func main() {
 		return
 	}
 
+	noticer, err := models.NewMail(10 * time.Second)
+	if err != nil {
+		log.Error(err.Error())
+		return
+	}
+	go models.StartNoticer(noticer)
+
 	go func() {
 		err := httpServer.Serve(httpL)
 		if err != nil {

conf/conf.go

@@ -49,6 +49,7 @@ type Conf struct {
 	Once    string // 马上执行任务路径
 	Lock    string // job lock 路径
 	Group   string // 节点分组
+	Noticer string // 通知
 
 	Ttl        int64 // 节点超时时间，单位秒
 	ReqTimeout int   // 请求超时时间，单位秒
@@ -128,10 +129,13 @@ func (c *Conf) parse() error {
 	}
 	log.InitConf(c.Log)
 
-	c.Cmd = cleanKeyPrefix(c.Cmd)
 	c.Node = cleanKeyPrefix(c.Node)
 	c.Proc = cleanKeyPrefix(c.Proc)
+	c.Cmd = cleanKeyPrefix(c.Cmd)
+	c.Once = cleanKeyPrefix(c.Once)
+	c.Lock = cleanKeyPrefix(c.Lock)
 	c.Group = cleanKeyPrefix(c.Group)
+	c.Noticer = cleanKeyPrefix(c.Noticer)
 
 	return nil
 }
@@ -185,7 +189,7 @@ func (c *Conf) reload() {
 	}
 
 	// etcd key 选项需要重启
-	cf.Node, cf.Proc, cf.Cmd, cf.Once, cf.Lock, cf.Group = c.Node, c.Proc, c.Cmd, c.Once, c.Lock, c.Group
+	cf.Node, cf.Proc, cf.Cmd, cf.Once, cf.Lock, cf.Group, cf.Noticer = c.Node, c.Proc, c.Cmd, c.Once, c.Lock, c.Group, c.Noticer
 
 	*c = *cf
 	log.Noticef("config file[%s] reload success", *confFile)

conf/files/base.json.sample

@@ -6,6 +6,7 @@
     "Once": "/cronsun/once/",
     "Lock": "/cronsun/lock/",
     "Group": "/cronsun/group/",
+    "Noticer": "/cronsun/noticer/",
     "#Ttl": "节点超时时间，单位秒",
     "Ttl": 10,
     "#ReqTimeout": "etcd 请求超时时间，单位秒",

models/noticer.go

@@ -1,8 +1,11 @@
 package models
 
 import (
+	"encoding/json"
+	"fmt"
 	"time"
 
+	client "github.com/coreos/etcd/clientv3"
 	"github.com/go-gomail/gomail"
 
 	"sunteng/commons/log"
@@ -28,9 +31,25 @@ type Mail struct {
 	msgChan chan *Message
 }
 
-func NewMail() (m *Mail, err error) {
-	cf := conf.Config.Mail
-	sc, err := cf.Dialer.Dial()
+func NewMail(timeout time.Duration) (m *Mail, err error) {
+	var (
+		sc   gomail.SendCloser
+		done = make(chan struct{})
+		cf   = conf.Config.Mail
+	)
+
+	// qq 邮箱的 Auth 出错后， 501 命令超时 2min 才能退出
+	go func() {
+		sc, err = cf.Dialer.Dial()
+		close(done)
+	}()
+
+	select {
+	case <-done:
+	case <-time.After(timeout):
+		err = fmt.Errorf("connect to smtp timeout")
+	}
+
 	if err != nil {
 		return
 	}
@@ -47,6 +66,7 @@ func NewMail() (m *Mail, err error) {
 
 func (m *Mail) Serve() {
 	var err error
+	sm := gomail.NewMessage()
 	for {
 		select {
 		case msg := <-m.msgChan:
@@ -59,7 +79,7 @@ func (m *Mail) Serve() {
 				m.open = true
 			}
 
-			sm := gomail.NewMessage()
+			sm.Reset()
 			sm.SetHeader("From", m.cf.Username)
 			sm.SetHeader("To", msg.To...)
 			sm.SetHeader("Subject", msg.Subject)
@@ -79,3 +99,26 @@ func (m *Mail) Serve() {
 		}
 	}
 }
+
+func (m *Mail) Send(msg *Message) {
+	m.msgChan <- msg
+}
+
+func StartNoticer(n Noticer) {
+	go n.Serve()
+	rch := DefalutClient.Watch(conf.Config.Noticer, client.WithPrefix())
+	var err error
+	for wresp := range rch {
+		for _, ev := range wresp.Events {
+			switch {
+			case ev.IsCreate(), ev.IsModify():
+				msg := new(Message)
+				if err = json.Unmarshal(ev.Kv.Value, msg); err != nil {
+					log.Warnf("msg[%s] umarshal err: %s", string(ev.Kv.Value), err.Error())
+					continue
+				}
+				n.Send(msg)
+			}
+		}
+	}
+}