go如何爬取eth价格

package mainimport (   "encoding/json"   "fmt"   "github.com/PuerkitoBio/goquery"   "net/http"   "strconv"   "strings")func main() {   var (      res    *http.Response      reqest *http.Request      client = &http.Client{}      err    error   )   reqest, err = http.NewRequest("POST", "http://srh.bankofchina.com/search/whpj/search.jsp", strings.NewReader("pjname=1316"))   reqest.Header.Add("User-Agent", "Mozilla/5.0 (X11; Fedora; Linux x86_64) AppleWebKit/537.36 (KHTML, like "+      "Gecko) Chrome/73.0.3683.75 Safari/537.36")   reqest.Header.Set("Content-Type", "application/x-www-form-urlencoded")   reqest.Header.Add("Referer", "http://www.boc.cn/sourcedb/whpj/")   reqest.Header.Add("Origin", "http://srh.bankofchina.com")   reqest.Header.Add("Cookie", "JSESSIONID=0000poVLE_MQLZrCgwhZtvexMYX:-1")   reqest.Header.Add("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,"+      "image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3")   reqest.Header.Add("Host", "srh.bankofchina.com")   if res, err = client.Do(reqest); err != nil {      return   }   defer res.Body.Close()   test()}func test() {   var (      doc *goquery.Document   )   resp, err := http.Get("https://www.feixiaohao.com/currencies/ethereum/")   if err != nil {      // handle error   }   defer resp.Body.Close()   if doc, err = goquery.NewDocumentFromReader(resp.Body); err != nil {      return   }   //ll := doc.Find(`.priceInfo .convert`).Text()   //fmt.Println(ll)   doc.Find(`.priceInfo`).Each(func(i int, selection *goquery.Selection) {      t := selection.Find(".convert").Text()      fmt.Println(t)      a := ""      for _i, v := range t {         if string(v) == "$" {            a = t[:_i]         }      }      fmt.Println(a)   })}func priGetEthPrice() (ret float64, err error) {   var (      url  = "http://api.zb.cn/data/v1/ticker?market=eth_usdt"      resp *http.Response      doc  *goquery.Document      data float64   )   // 获取数据   if resp, err = http.Get(url); err == nil {      defer resp.Body.Close()   } else {      return   }   // 解析参数   if doc, err = goquery.NewDocumentFromReader(resp.Body); err != nil {      return   }   var d *struct {      Ticker struct {         Buy string `json:"buy"`      }   }   if err = json.Unmarshal([]byte(doc.Text()), &d); err != nil {      return   }   if data, err = strconv.ParseFloat(d.Ticker.Buy, 64); err != nil {      return   }   ret = data   return}