init

pkg/exchangeRate/exchangeRate.go

@@ -0,0 +1,54 @@
+package exchangeRate
+
+import (
+	"errors"
+	"strconv"
+	"time"
+
+	"github.com/go-resty/resty/v2"
+)
+
+const (
+	Url = "https://api.exchangerate.host"
+)
+
+type Response struct {
+	Success bool   `json:"success"`
+	Terms   string `json:"terms"`
+	Privacy string `json:"privacy"`
+	Query   struct {
+		From   string  `json:"from"`
+		To     string  `json:"to"`
+		Amount float64 `json:"amount"`
+	} `json:"query"`
+	Info struct {
+		Timestamp int64   `json:"timestamp"`
+		Quote     float64 `json:"quote"`
+	} `json:"info"`
+	Result float64 `json:"result"`
+}
+
+func GetExchangeRete(form, to, access string, amount float64) (float64, error) {
+	client := resty.New()
+	client.SetRetryCount(3)
+	client.SetTimeout(5 * time.Second)
+	client.SetBaseURL(Url)
+	// amount  to string
+	amountStr := strconv.FormatFloat(amount, 'f', -1, 64)
+
+	client.SetQueryParams(map[string]string{
+		"from":       form,
+		"to":         to,
+		"amount":     amountStr,
+		"access_key": access,
+	})
+	resp := new(Response)
+	_, err := client.R().SetResult(resp).Get("/convert")
+	if err != nil {
+		return 0, err
+	}
+	if !resp.Success {
+		return 0, errors.New("exchange rate failed")
+	}
+	return resp.Result, nil
+}

pkg/exchangeRate/exchange_rate_test.go

@@ -0,0 +1,12 @@
+package exchangeRate
+
+import "testing"
+
+func TestGetExchangeRete(t *testing.T) {
+	t.Skip("skip TestGetExchangeRete")
+	result, err := GetExchangeRete("USD", "CNY", "90734e5af4f5353114cdaf3bb9c3f2e3", 1)
+	if err != nil {
+		t.Fatal(err)
+	}
+	t.Log(result)
+}