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Go: Yahoo 郵便番号検索API の使い方

Posted at

参考ページ
郵便番号検索API

get_address.go
// ---------------------------------------------------------------
//
//	get_address.go
//
//					Jul/31/2022
// ---------------------------------------------------------------
package main

import (
	"os"
	"fmt"
	"io/ioutil"
	"net/http"
	"encoding/json"
	"github.com/joho/godotenv"
)

// ---------------------------------------------------------------
func json_parse_proc(str_json string) {
	var jsonBlob = []byte(str_json)
	var jsonObj interface{}
	_ = json.Unmarshal(jsonBlob, &jsonObj)

	address := jsonObj.(map[string]interface{})["Feature"].([]interface{})[0].(map[string]interface{})["Property"].(map[string]interface{})["Address"]

	fmt.Println(address)
}

// ---------------------------------------------------------------
func main() {
	fmt.Fprintf (os.Stderr,"*** 開始 ***\n")

	err := godotenv.Load(".env")
	if err != nil {
		panic(err)
		}

	appid := os.Getenv("APPID")

	code_zip := os.Args[1]
	fmt.Fprintf (os.Stderr,"%s\n",code_zip)
	url_base := "https://map.yahooapis.jp/search/zip/V1/zipCodeSearch"
	url_target := url_base + "?query=" + code_zip + "&output=json"
	req, _ := http.NewRequest("GET", url_target, nil)
	req.Header.Set("USER-AGENT", "Yahoo AppID: " + appid)
	client := new(http.Client)
	res, err := client.Do(req)
	if err != nil {
		fmt.Println("Request error:", err)
		return
	}
	defer res.Body.Close()

	body, err := ioutil.ReadAll(res.Body)
	if err != nil {
		fmt.Println("Request error:", err)
		return
	}

	str_json := string(body)

	json_parse_proc(str_json)

	fmt.Fprintf (os.Stderr,"*** 終了 ***\n")
}

// ---------------------------------------------------------------
.env
APPID = 'dj0zaiZpPW9NN3F****'

実行の準備

go mod init member
go mod tidy

実行例

$ go run get_address.go 131-8634
*** 開始 ***
131-8634
東京都墨田区押上1-1-2東京スカイツリーイーストタワー11F
*** 終了 ***

次のバージョンで確認しました。

$ go version
go version go1.18.4 linux/amd64
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