4、golang 发送电子邮件

在golang中发送电子邮件有两种方式：

• 使用net/smtp
• 使用gopkg.in/gomail.v2

• 使用net/smtp

  package model
  
  import (
  	"fmt"
      "net/smtp"
  	"strings"
  )
  
  func SendToMail(userName, password, mailServer, to, subject, body, mailType string) error {
  
  	// 拼接消息体
  	var contentType string
  	if mailType == "html" {
  		contentType = "Content-Type: text/" + mailType + "; charset=UTF-8"
  	} else {
  		contentType = "Content-Type: text/plain" + "; charset=UTF-8"
  	}
  	msg := []byte("To: " + to + "rnFrom: " + userName + "rnSubject: " + subject + "rn" + contentType + "rnrn" + body)
  
  	// msg 内容输出查看
  	fmt.Println("To: " + to + "rn" +
  		"From: " + userName + "rn" +
  		"Subject: " + subject + "rn" +
  		"" + contentType + "rnrn" +
  		"" + body)
  
  	// 进行身份认证
  	hp := strings.Split(mailServer, ":")
  	auth := smtp.PlainAuth("", userName, password, hp[0])
  
  	sendTo := strings.Split(to, ";")
  	err := smtp.SendMail(mailServer, auth, userName, sendTo, msg)
  	return err
  }
  
  
  func main()  {
  	var userName  = "***@163.com"
  	var password = "***"
  	var mailServer = "smtp.163.com:25"
  	var to = "**@qq.com"
  	var subject = "犀点意象安全团队"
  
  	body := `
  		您的服务存在异常，请查收！！！
  		`
  	bodyHtml :=`
  					
  						您的服务存在异常
  					
  				
  				`
  	fmt.Println("send email")
  	var err error
  	err = SendToMail(userName, password, mailServer, to, subject, body, "")
  	if err != nil {
  		fmt.Println("Send text-mail error!")
  		fmt.Println(err)
  	} else {
  		fmt.Println("Send text-mail success!")
  	}
  	err = SendToMail(userName, password, mailServer, to, subject, bodyHtml, "html")
  	if err != nil {
  		fmt.Println("Send html-mail error!")
  		fmt.Println(err)
  	} else {
  		fmt.Println("Send html-mail success!")
  	}
  }
  

• 使用gopkg.in/gomail.v2

  package model
  
  import (
  	"fmt"
  	"gopkg.in/gomail.v2"
  	"net/smtp"
  	"strings"
  )
  
  const (
  	// 邮件服务器地址
  	MailHost = "smtp.163.com"
  	// 端口
  	MailPort = 25
  	// 发送邮件用户账号
  	MailUser = "******@163.com"
  	// 授权密码
  	MailPwd = "********"
  )
  
  
  func SendGoMail(mailAddress []string, subject string, body string) error {
  	m := gomail.NewMessage()
  	// 这种方式可以添加别名，即 nickname， 也可以直接用m.SetHeader("From", MAIL_USER)
  	nickname := "gomail"
  	m.SetHeader("From",nickname + "<" +MailUser+ ">")
  	// 发送给多个用户
  	m.SetHeader("To", mailAddress...)
  	// 设置邮件主题
  	m.SetHeader("Subject", subject)
  	// 设置邮件正文
  	m.SetBody("text/html", body)
  	d := gomail.NewDialer(MailHost, MailPort, MailUser, MailPwd)
  	// 发送邮件
  	err := d.DialAndSend(m)
  	return err
  }
  
  

  package model
  
  import "testing"
  
  func TestSendGoMail(t *testing.T) {
  	type args struct {
  		mailAddress []string
  		subject     string
  		body        string
  	}
  	tests := []struct {
  		name    string
  		args    args
  		wantErr bool
  	}{
  		// TODO: Add test cases.
  		{
  			name: "01",
  			args:
  				args{
  					subject:"您好，这是gomail-text测试邮件",
  					mailAddress:[]string{"******@qq.com"},
  					body:`
  					您的服务存在异常，请查收！！！
  				`} ,
  			wantErr:false },
  		{
  			name: "02",
  			args:
  				args{
  					subject:"您好，这是gomail-html测试邮件",
  					mailAddress:[]string{"*****@qq.com"},
  					body:`
  							
  								您的服务存在异常
  							
  						
  				`} ,
  			wantErr:false },
  	}
  	for _, tt := range tests {
  		t.Run(tt.name, func(t *testing.T) {
  			if err := SendGoMail(tt.args.mailAddress, tt.args.subject, tt.args.body); (err != nil) != tt.wantErr {
  				t.Errorf("SendGoMail() error = %v, wantErr %v", err, tt.wantErr)
  			}
  		})
  	}
  }