使用golang每天给自己发送一封天气预报的邮件

https://restapi.amap.com/v3/weather/weatherInfo?parameters

func doHttpGetRequest(url string) (rlt string,err error)  {
	resp,err := http.Get(url)
	if err!=nil {
		return "",err
	} else {
		defer resp.Body.Close()
		body,err := ioutil.ReadAll(resp.Body)
		if err != nil {
			return "",err
		} else {
			return string(body),err
		}
	}
}

func getWeather() (string,string,error) {
	url := "https://restapi.amap.com/v3/weather/weatherInfo?"
	key := "你的appkey"
	city := "370211"
	ext := "all"
	rlt,err:=doHttpGetRequest(url + "city=" + city + "&key=" + key + "&extensions=" + ext)
	var data Weather
	var fore Forecast
	var cast Cast
	json.Unmarshal([]byte(rlt),&data)
	if err != nil {
		return err.Error(),"",err
	} else {
		fore = data.Forecasts[0]
		output := fore.Province + fore.City + " 预报时间：" + fore.Reporttime + "\n"
		var str,subject string
		for i := 0; i < len(fore.Casts); i++ {
			cast = fore.Casts[i]
			str += "日期：" +cast.Date+ "\t星期"+NumToStr(cast.Week)+
				"\n白天：【天气："+cast.Dayweather+"\t	温度："+cast.Daytemp+"\t	风向："+cast.Daywind+"\t	风力："+cast.Daypower+"】"+
				"\n夜晚：【天气："+cast.Nightweather+"\t	温度："+cast.Nighttemp+"\t\t	风向："+cast.Nightwind+"\t	风力："+cast.Nightpower+"】\r\n"
		}
		subject = verity(fore.Casts[0].Dayweather,fore.Casts[0].Nightweather)
		return subject,output+str,nil
	}
}

func verity(dayweather,nightweather string) string {
	var sub string
	rain := "雨"
	snow := "雪"
	sub = "收藏点赞投硬币，新的一天会有好事发生哝 ||今日天气预报"
	if strings.Contains(dayweather,rain) || strings.Contains(nightweather,rain) {
		sub = sub + "今天将降雨，出门请别忘带伞"
	}
	if strings.Contains(dayweather,snow) || strings.Contains(nightweather,snow) {
		sub = sub + "    下雪了"
	}
	return sub
}

func NumToStr(str string) string {
	switch str {
	case "1":
		return "一"
	case "2":
		return "二"
	case "3":
		return "三"
	case "4":
		return "四"
	case "5":
		return "五"
	case "6":
		return "六"
	case "7":
		return "日"
	}
	return ""
}

type Weather struct {
	Status 		string 		`json:"status"返回状态`
	Count		string		`json:"count"返回结果总条数`
	Info 		string		`json:"info"返回的状态信息`
	Infocode	string		`json:"infocode"返回状态说明`
	Forecasts 	[]Forecast	`json:"forecasts"预报天气信息数据`
}
type Forecast struct {
	City 		string		`json:"city"城市名称`
	Adcode		string		`json:"adcode"城市编码`
	Province	string		`json:"province"省份`
	Reporttime	string		`json:"reporttime"预报时间`
	Casts		[]Cast		`json:casts预报数据`
}
type Cast struct {
	Date 		string		`json:"date"日期`
	Week 		string		`json:"week"星期`
	Dayweather 	string		`json:"dayweather"白天天气`
	Nightweather string		`json:"nightweather"晚上天气`
	Daytemp		string		`json:"daytemp"白天温度`
	Nighttemp	string		`json:"nighttemp"晚上温度`
	Daywind		string		`json:"daywind"白天风向`
	Nightwind 	string		`json:"nightwind"晚上风向`
	Daypower 	string		`json:"daypower"白天风力`
	Nightpower	string		`json:"nightpower"晚上风力`
}

func sendToMail(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 +"\r\nFrom: " + user + "<"+
		user + ">\r\nSubject: "+ subject + "\r\n" +
		content_type + "\r\n\r\n" + body)
	send_to := strings.Split(to,";")
	err := smtp.SendMail(host,auth,user,send_to,msg)
	return err
}

func sendEmail(subject,body string)  {
	user := "发件箱"
	pwd := "发件箱的授权码"
	host := "smtp.126.com:25"
	to := "收件箱"//可以用;隔开发送多个
	fmt.Println("send email")
	err := sendToMail(user,pwd,host,to,subject,body,"html")
	if err != nil {
		fmt.Println("Send mail error!")
		fmt.Println(err)
	} else {
		fmt.Println("Send mail success!")
	}
}

func main() {
	TimeSettle()
}

//定时结算
func TimeSettle()  {
	d := time.Duration(time.Minute)
	t := time.NewTicker(d)
	defer t.Stop()
	for  {
		currentTime := time.Now()
		if currentTime.Hour() == 8 {
			sendinfo()
			time.Sleep(time.Hour)
		}
		<-t.C
	}
}