Go: stripe API 使い方 (List all customers)

こちらのページの続きです。
stripe API 使い方 (List all customers)

#Go http でカスタマーの一覧を取得#

必要なライブラリーのインストール

go get github.com/joho/godotenv

go mod init get_customers_http
go mod tidy

get_customers_http.go

// ---------------------------------------------------------------
//	get_customers_http.go
//
//					Dec/17/2021
// ---------------------------------------------------------------

package main

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

// ---------------------------------------------------------------
func main() {
	fmt.Printf ("*** 開始 ***\n")
	err := godotenv.Load(".env")
	if err != nil {
		panic(err)
		}

	secret_key := os.Getenv("SECRET_KEY")

	url_target := "https://api.stripe.com/v1/customers"
	req, _ := http.NewRequest("GET", url_target, nil)
	req.Header.Set("Authorization", "Bearer " + secret_key)
	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)
	var dict_aa map[string]interface{}
	json.Unmarshal ([]byte(str_json), &dict_aa )

	slice_aa := dict_aa["data"].([]interface{})
        nn := len(slice_aa)
        fmt.Printf("nn = %d\n", nn)

	for it := 0; it < nn; it++ {
		unit := dict_aa["data"].([]interface{})[it]
		fmt.Println(unit.(map[string]interface{})["id"])
	}

	fmt.Printf ("*** 終了 ***\n")
}

// ---------------------------------------------------------------

実行結果

$ go run get_customers_http.go
*** 開始 ***
nn = 4
cus_KmrIU4hzWqYt7R
cus_KmoG4k1wiKxSDc
cus_KmnqmJhBAvPGMq
cus_KmnpiRFjm8he97
*** 終了 ***

#Go sdk でカスタマーの一覧を取得#

sdk のインストール

go get github.com/stripe/stripe-go/v72

go mod init get_customers_sdk
go mod tidy

get_customers_sdk.go

// ---------------------------------------------------------------
//	get_customers_sdk.go
//
//					Dec/17/2021
// ---------------------------------------------------------------

package main

import (
	"os"
	"fmt"
	"github.com/stripe/stripe-go/v72"
	"github.com/stripe/stripe-go/v72/customer"
	"github.com/joho/godotenv"
)

// ---------------------------------------------------------------
func main () {

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

stripe.Key = os.Getenv("SECRET_KEY")

params := &stripe.CustomerListParams{}
params.Filters.AddFilter("limit", "", "10")
ii := customer.List(params)
for ii.Next() {
	cc := ii.Customer()
	fmt.Println(cc.ID)
	}

}

// ---------------------------------------------------------------

実行結果

$ go run get_customers_sdk.go
cus_KmrIU4hzWqYt7R
cus_KmoG4k1wiKxSDc
cus_KmnqmJhBAvPGMq
cus_KmnpiRFjm8he97