116 lines
2.9 KiB
Go
116 lines
2.9 KiB
Go
package main
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import (
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"encoding/xml"
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"fmt"
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"io"
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"net/http"
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"strconv"
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"strings"
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"time"
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"golang.org/x/text/encoding/charmap"
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)
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type ValCurs struct {
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XMLName xml.Name `xml:"ValCurs"`
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Text string `xml:",chardata"`
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Date string `xml:"Date,attr"`
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Name string `xml:"name,attr"`
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Valute []struct {
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Text string `xml:",chardata"`
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ID string `xml:"ID,attr"`
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NumCode string `xml:"NumCode"`
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CharCode string `xml:"CharCode"`
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Nominal string `xml:"Nominal"`
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Name string `xml:"Name"`
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Value string `xml:"Value"`
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} `xml:"Valute"`
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}
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type result struct {
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name string
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value float64
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CharCode string
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date string
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}
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func CharsetReader(char string, data io.Reader) (io.Reader, error) {
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if char == "windows-1251" {
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return charmap.Windows1251.NewDecoder().Reader(data), nil
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}
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return nil, fmt.Errorf("Кодировка не поддерживается")
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}
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func MaxMinAvg(Curss []*ValCurs) (map[string]result, *float64) {
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var min, max result
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var agv, summ float64
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var summItem int
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res := make(map[string]result)
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for i := 0; i < len(Curss); i++ {
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for j := 0; j < len(Curss[i].Valute); j++ {
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val, err := strconv.ParseFloat(strings.Replace(Curss[i].Valute[j].Value, ",", ".", 1), 64)
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if err != nil {
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fmt.Println(err)
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return nil, nil
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}
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if val < min.value || min.value == 0 {
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min.value = val
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min.name = Curss[i].Valute[j].Name
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min.CharCode = Curss[i].Valute[j].CharCode
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min.date = Curss[i].Date
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}
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if val > max.value {
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max.value = val
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max.name = Curss[i].Valute[j].Name
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max.CharCode = Curss[i].Valute[j].CharCode
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max.date = Curss[i].Date
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}
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summ += val
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summItem += i
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}
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}
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res["Min"] = min
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res["Max"] = max
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agv = summ / float64(summItem)
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return res, &agv
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}
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func main() {
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Curss := []*ValCurs{}
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Client := http.Client{
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Timeout: time.Second * 10,
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}
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t := time.Now()
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fmt.Println("Пожалуйста подождите....")
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for i := 0; i <= 90; i++ {
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buff := ValCurs{}
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data := fmt.Sprint(t.Add((-2160 + 24*time.Duration(i)) * time.Hour).Format("02/01/2006"))
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req, err := http.NewRequest("GET", "http://www.cbr.ru/scripts/XML_daily_eng.asp?date_req="+data, nil)
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if err != nil {
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fmt.Println(err)
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}
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req.Header.Add("User-Agent", "PostmanRuntime/7.31.3")
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res, err := Client.Do(req)
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if err != nil {
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fmt.Println(err)
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}
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defer res.Body.Close()
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dacoder := xml.NewDecoder(res.Body)
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dacoder.CharsetReader = CharsetReader
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err = dacoder.Decode(&buff)
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if err != nil {
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fmt.Println(err)
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}
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Curss = append(Curss, &buff)
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}
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MaxMin, avg := MaxMinAvg(Curss)
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fmt.Println("Минимальный Курс")
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fmt.Println(MaxMin["Min"].value, " ", MaxMin["Min"].name, " ", MaxMin["Min"].CharCode, " ", MaxMin["Min"].date)
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fmt.Println("Максимальный Курс")
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fmt.Println(MaxMin["Max"].value, " ", MaxMin["Max"].name, " ", MaxMin["Max"].CharCode, " ", MaxMin["Max"].date)
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fmt.Println("Среднее значение курса", float32(*avg))
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}
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