Go实现爬取城市七天内的天气

packagemainimport (
"flag""github.com/go-rod/rod""log")
const (
nationwideUrl="https://www.tianqi.com/chinacity.html")
funcmain() {
varcity=flag.String("c", "", "the config file")
flag.Parse()
url :=cityUrl(*city)
ifurl=="" {
log.Fatalf("url is empty")
return    }
weatherData(url)
}
funcweatherData(urlstring) {
page :=rod.New().MustConnect().MustPage(url)
//直接使用选择器选择七天天气内容体projects :=page.MustElement("ul.weaul").MustElements("li")
for_, project :=rangeprojects {
var (
datestringweatherstringcentigradestring        )
//获取日期ifok, dateEle, _ :=project.Has(".weaul_q"); ok {
ifdateEle.MustHas(".fl") {
date=dateEle.MustElement(".fl").MustText()
            }
        }
for_, weatherEle :=rangeproject.MustElements(".weaul_z") {
//如果存在span则是温度 否则是天气情况ifweatherEle.MustHas("span") {
var (
startCstringendCstring                )
//获取温度fork, cEle :=rangeweatherEle.MustElements("span") {
ifk==0 {
startC=cEle.MustText()
                    } else {
endC=cEle.MustText()
                    }
                }
centigrade=startC+"~"+endC            } else {
weather=weatherEle.MustText()
            }
        }
log.Printf("日期：%s｜天气：%s｜摄氏度：%s℃\n", date, weather, centigrade)
    }
}
funccityUrl(citystring) string {
cityMap :=make(map[string]string)
page :=rod.New().MustConnect().MustPage(nationwideUrl)
provinceProjects :=page.MustElement(".citybox").MustElements("h2")
cityProjects :=page.MustElement(".citybox").MustElements("span")
for_, section :=rangeprovinceProjects {
cityMap[section.MustElement("a").MustText()] =section.MustElement("a").MustProperty("href").String()
    }
for_, section :=rangecityProjects {
for_, a :=rangesection.MustElements("a") {
cityMap[a.MustText()] =a.MustProperty("href").String()
        }
    }
ifhref, ok :=cityMap[city]; ok {
returnhref+"7/"    }
return""}