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coincheck_market_price.10s.go http://hitoriblog.com/?p=50182
package main
import (
"encoding/json"
"fmt"
"io/ioutil"
"net/http"
"os"
"strconv"
)
// Rate json struct
type Rate struct {
Rate string `json:"rate"`
}
var jsonFile = os.Getenv("HOME") + "/coincheck.json"
func init() {
// os.Setenv("HTTP_PROXY", "http://192.168.0.2:3128")
}
func putsMenu() {
fmt.Println("---")
fmt.Println("ビットコイン(Bitcoin)価格チャート 5分足 | href=https://coincheck.com/ja/exchange/charts/coincheck/btc_jpy/300")
fmt.Println("ビットコイン(Bitcoin)価格チャート 15分足 | href=https://coincheck.com/ja/exchange/charts/coincheck/btc_jpy/900")
fmt.Println("ビットコイン(Bitcoin)価格チャート 1時間足 | href=https://coincheck.com/ja/exchange/charts/coincheck/btc_jpy/3600")
fmt.Println("ビットコイン(Bitcoin)価格チャート 4時間足 | href=https://coincheck.com/ja/exchange/charts/coincheck/btc_jpy/14400")
fmt.Println("ビットコイン(Bitcoin)価格チャート 24時間足 | href=https://coincheck.com/ja/exchange/charts/coincheck/btc_jpy/86400")
}
func main() {
color := "black"
diff := "0.0"
resp, err := http.Get("https://coincheck.com/api/rate/btc_jpy")
defer resp.Body.Close()
if err != nil {
panic(err)
}
jsonData, err := ioutil.ReadAll(resp.Body)
if err != nil {
panic(err)
}
var rate Rate
if err := json.Unmarshal(jsonData, &rate); err != nil {
panic(err)
}
current, _ := strconv.ParseFloat(rate.Rate, 64)
if _, err := os.Stat(jsonFile); err == nil {
var previousRate Rate
j, err := ioutil.ReadFile(jsonFile)
if err != nil {
panic(err)
}
if err := json.Unmarshal(j, &previousRate); err != nil {
panic(err)
}
previous, _ := strconv.ParseFloat(previousRate.Rate, 64)
if d := current - previous; d > 0 {
color = "green"
diff = fmt.Sprintf("+%.01f", d)
} else if d < 0 {
color = "red"
diff = fmt.Sprintf("%.01f", d)
}
}
ioutil.WriteFile(jsonFile, jsonData, os.ModePerm)
fmt.Printf("%.01f (%s) | color=%s\n", current, diff, color)
putsMenu()
}
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