[Tutoriel] Unmarchal JSON en utilisant Golang

Ceci est un exemple de la manière à suivre pour décoder un JSON avec Golang en utilisant des structures.

	/* Expected output:
	{success {198aMn6ZYAczwrE5NvNTUMyJ5qkfy4g3Hi false 8000.00236957 0 8000.00236957 33 {2009-02-22T10:50:53Z 0f0fbcc18fd0d090ad3402574df8404cec1176bc000f9aa0dc19f8d832ff94db 0 400 432048} {2016-08-11T16:33:24Z c653ac1e7a66117e097dd16cfd122b24b0f92060d096d8754a1e550d4c64f520 0 0.0002 12549} true} 200 }
	>------------------------------<
	Status: success
	Code: 200
	Message:
	Address: 198aMn6ZYAczwrE5NvNTUMyJ5qkfy4g3Hi
	Is known: false
	Balance: 8000.002370
	Balance Multi Signature: 0.000000
	Total Recieved: 8000.002370
	NB Transactions: 33.000000
	First Transaction Tx: 0f0fbcc18fd0d090ad3402574df8404cec1176bc000f9aa0dc19f8d832ff94db
	Last Transaction Tx: c653ac1e7a66117e097dd16cfd122b24b0f92060d096d8754a1e550d4c64f520
	*/
	/*
	NB: The default concrete Go types are:
	- bool for JSON booleans
	- float64 for JSON numbers
	- string for JSON strings
	- nil for JSON null
	*/
	package main
	import (
	"encoding/json"
	"fmt"
	"log"
	)
	var my_json string = `{
	"status":"success",
	"data":{
	"address":"198aMn6ZYAczwrE5NvNTUMyJ5qkfy4g3Hi",
	"is_unknown":false,
	"balance":8000.00236957,
	"balance_multisig":0,
	"totalreceived":8000.00236957,
	"nb_txs":33,
	"first_tx":
	{
	"time_utc":"2009-02-22T10:50:53Z",
	"tx":"0f0fbcc18fd0d090ad3402574df8404cec1176bc000f9aa0dc19f8d832ff94db",
	"block_nb":"5219",
	"value":400,
	"confirmations":432048
	},
	"last_tx":
	{
	"time_utc":"2016-08-11T16:33:24Z",
	"tx":"c653ac1e7a66117e097dd16cfd122b24b0f92060d096d8754a1e550d4c64f520",
	"block_nb":"424718",
	"value":0.0002,
	"confirmations":12549
	},
	"is_valid":true
	},
	"code":200,
	"message":""
	}`
	type Response struct {
	Status string `json:"status"`
	Data ResponseData `json:"data"`
	Code float64 `json:"code"`
	Message string `json:"message"`
	}
	type ResponseData struct {
	Address string `json:"address"`
	IsKnown bool `json:"is_unknown"`
	Balance float64 `json:"balance"`
	BalanceMultiSig float64 `json:"balance_multisig"`
	TotalRecieved float64 `json:"totalreceived"`
	NbTxs float64 `json:"nb_txs"`
	FirstTxs ResponseFirstTxs `json:"first_tx"`
	LastTxs ResponseLastTxs `json:"last_tx"`
	IsValid bool `json:"is_valid"`
	}
	type ResponseFirstTxs struct {
	Time string `json:"time_utc"`
	Tx string `json:"tx"`
	BlockNb string `json:"block_nb"`
	Value float64 `json:"value"`
	Confirmations int64 `json:"confirmations"`
	}
	type ResponseLastTxs struct {
	Time string `json:"time_utc"`
	Tx string `json:"tx"`
	BlockNb string `json:block_nb"`
	Value float64 `json:value"`
	Confirmations int64 `json:confirmations"`
	}
	func main() {
	res := Response{}
	err := json.Unmarshal([]byte(my_json), &res)
	if err != nil {
	log.Fatal("Unmarchal failed!\n", err)
	}
	fmt.Println(res)
	fmt.Println(">------------------------------<")
	fmt.Printf("Status: %s\n", res.Status)
	fmt.Printf("Code: %.0f\n", res.Code)
	fmt.Printf("Message: %s\n", res.Message)
	fmt.Printf("Address: %s\n", res.Data.Address)
	fmt.Printf("Is known: %v\n", res.Data.IsKnown)
	fmt.Printf("Balance: %f\n", res.Data.Balance)
	fmt.Printf("Balance Multi Signature: %f\n", res.Data.BalanceMultiSig)
	fmt.Printf("Total Recieved: %f\n", res.Data.TotalRecieved)
	fmt.Printf("NB Transactions: %f\n", res.Data.NbTxs)
	fmt.Printf("First Transaction Tx: %s\n", res.Data.FirstTxs.Tx)
	fmt.Printf("Last Transaction Tx: %s\n", res.Data.LastTxs.Tx)
	}

view raw GoUnmarchalComplexJSON.go hosted with ❤ by GitHub