配置文件 conf.json
{
"Username": "sunxxg@163.com",
"Password": "123456",
"Smtphost":"smtp.163.com:25"
}
主程序 sendmail.go
package main
import (
"encoding/json"
"fmt"
"io"
"log"
"net/smtp"
"os"
"strings"
)
type cfgmail struct {
Username string
Password string
Smtphost string
}
type cfg struct {
Name, Text string
}
func main() {
// 从json文件中读取发送邮件服务器配置信息
cfgjson := getConf()
var cfg cfgmail
dec := json.NewDecoder(strings.NewReader(cfgjson))
if err := dec.Decode(&cfg); err == io.EOF {
break
} else if err != nil {
log.Fatal(err)
}
//fmt.Printf("%sn%sn%sn", cfg.Username, cfg.Password, cfg.Smtphost)
username := cfg.Username
password := cfg.Password
host := cfg.Smtphost
to := "10010@qq.com"
fmt.Printf("============")
fmt.Println(username)
subject := "能否收到邮件哟？Test send email by golang"
body := `
<html>
<body>
<h3>
"Test send email by golang，来个测试试一下"
</h3>
</body>
</html>
`
err := SendMail(username, password, host, to, subject, body, "html")
if err != nil {
fmt.Println("send mail error!")
fmt.Println(err)
} else {
fmt.Println("send mail success!")
}
}
func SendMail(user, password, host, to, subject, body, mailtype string) error {
hp := strings.Split(host, ":")
auth := smtp.PlainAuth("", user, password, hp[0])
var content_type string
if mailtype == "html" {
content_type = "Content-Type: text/" + mailtype + "; charset=UTF-8"
} else {
content_type = "Content-Type: text/plain" + "; charset=UTF-8"
}
msg := []byte("To: " + to + "rnFrom: " + user + "<" + user + ">rnSubject: " + subject + "rn" + content_type + "rnrn" + body)
send_to := strings.Split(to, ";")
err := smtp.SendMail(host, auth, user, send_to, msg)
return err
}
func getConf() string {
filename := "conf.json"
file, err := os.Open(filename)
defer file.Close()
if err != nil {
fmt.Println("read conf file error")
log.Fatal(err)
}
buf := make([]byte, 512)
var str1 string
for {
n, _ := file.Read(buf)
if 0 == n {
break
}
//os.Stdout.Write(buf[:n])
str := string(buf[:n])
str1 = str1 + str
}
return str1
}
然后执行
$ go run sendmail.go
即可.
对于一些文件的操作，可参考：https://github.com/astaxie/build-web-application-with-golang/blob/master/ebook/07.0.md