Golang : Get all countries currencies code in JSON format

For this tutorial, we will learn how to get all the currencies names from http://country.io/currency.json and un-marshall them into a map. The next challenge will be getting their values against the US dollar, but we will put that into another tutorial.

Here you go!

 package main

 import (
  "encoding/json"
  "fmt"
  "io/ioutil"
  "net/http"
  "os"
 )

 func main() {

  resp, err := http.Get("http://country.io/currency.json")

  if err != nil {
 fmt.Println(err)
 os.Exit(1)
  }

  defer resp.Body.Close()

  jsonCurrenciesData, err := ioutil.ReadAll(resp.Body)

  if err != nil {
 fmt.Println(err)
 os.Exit(1)
  }

  //fmt.Println(string(jsonData))

  currenciesMap := make(map[string]interface{})

  // Decode JSON into our map
  err = json.Unmarshal([]byte(jsonCurrenciesData), &currenciesMap)

  if err != nil {
 println(err)
 return
  }

  for iso2, moneyName := range currenciesMap {
 fmt.Println("ISO2 code:", iso2, "Currency name :", moneyName)
  }

 }

Output :

 ISO2 code: BL Currency name : EUR
 ISO2 code: GE Currency name : GEL
 ISO2 code: SO Currency name : SOS
 ISO2 code: SH Currency name : SHP
 ISO2 code: SC Currency name : SCR
 ISO2 code: UM Currency name : USD
 ISO2 code: TG Currency name : XOF
 ISO2 code: GM Currency name : GMD
 ISO2 code: MF Currency name : EUR
 ISO2 code: MQ Currency name : EUR
 ISO2 code: MX Currency name : MXN
 ISO2 code: VU Currency name : VUV
 ISO2 code: LC Currency name : XCD
 ISO2 code: LV Currency name : EUR
 ISO2 code: AO Currency name : AOA
 ISO2 code: TC Currency name : USD
 ISO2 code: BS Currency name : BSD
 ISO2 code: OM Currency name : OMR
 ISO2 code: PE Currency name : PEN
 ISO2 code: MG Currency name : MGA
 ISO2 code: MU Currency name : MUR
 ISO2 code: NE Currency name : XOF
 ISO2 code: KP Currency name : KPW
 ISO2 code: SN Currency name : XOF
 ISO2 code: IM Currency name : GBP
 ISO2 code: AL Currency name : ALL
 ISO2 code: NA Currency name : NAD
 ISO2 code: NU Currency name : NZD
 ISO2 code: DO Currency name : DOP
 ISO2 code: AE Currency name : AED
 ISO2 code: TK Currency name : NZD
 ISO2 code: KG Currency name : KGS
 ISO2 code: LA Currency name : LAK
 ISO2 code: AQ Currency name : <----- empty??
 ISO2 code: WF Currency name : XPF
 ISO2 code: GF Currency name : EUR
 ISO2 code: KY Currency name : KYD
 ISO2 code: SG Currency name : SGD
 ISO2 code: DK Currency name : DKK
 ISO2 code: AR Currency name : ARS
 ISO2 code: BA Currency name : BAM
 ISO2 code: BJ Currency name : XOF
 ISO2 code: PL Currency name : PLN
 ISO2 code: GN Currency name : GNF
 ISO2 code: ZA Currency name : ZAR
 ISO2 code: MV Currency name : MVR
 ISO2 code: CA Currency name : CAD
 ISO2 code: CF Currency name : XAF
 ISO2 code: BR Currency name : BRL
 ISO2 code: ZM Currency name : ZMK
 ISO2 code: MM Currency name : MMK
 ISO2 code: BN Currency name : BND
 ISO2 code: BY Currency name : BYR
 ISO2 code: RU Currency name : RUB
 ISO2 code: GS Currency name : GBP
 ISO2 code: MP Currency name : USD
 ISO2 code: HU Currency name : HUF
 ISO2 code: PF Currency name : XPF
 ISO2 code: FO Currency name : DKK
 ISO2 code: TD Currency name : XAF
 ISO2 code: IN Currency name : INR
 ISO2 code: GP Currency name : EUR
 ISO2 code: ST Currency name : STD
 ISO2 code: VI Currency name : USD
 ISO2 code: MT Currency name : EUR
 ISO2 code: MR Currency name : MRO
 ISO2 code: VC Currency name : XCD
 ISO2 code: PR Currency name : USD
 ISO2 code: PG Currency name : PGK
 ISO2 code: PK Currency name : PKR
 ISO2 code: CG Currency name : XAF
 ISO2 code: KZ Currency name : KZT
 ISO2 code: BV Currency name : NOK
 ISO2 code: DJ Currency name : DJF
 ISO2 code: MZ Currency name : MZN
 ISO2 code: SI Currency name : EUR
 ISO2 code: GH Currency name : GHS
 ISO2 code: EH Currency name : MAD
 ISO2 code: ME Currency name : EUR
 ISO2 code: MH Currency name : USD
 ISO2 code: MK Currency name : MKD
 ISO2 code: MY Currency name : MYR
 ISO2 code: NL Currency name : EUR
 ISO2 code: AS Currency name : USD
 ISO2 code: RE Currency name : EUR
 ISO2 code: SX Currency name : ANG
 ISO2 code: SR Currency name : SRD
 ISO2 code: MA Currency name : MAD
 ISO2 code: FI Currency name : EUR
 ISO2 code: CN Currency name : CNY
 ISO2 code: SY Currency name : SYP
 ISO2 code: EE Currency name : EUR
 ISO2 code: MN Currency name : MNT
 ISO2 code: AT Currency name : EUR
 ISO2 code: GQ Currency name : XAF
 ISO2 code: HM Currency name : AUD
 ISO2 code: CI Currency name : XOF
 ISO2 code: CW Currency name : ANG
 ISO2 code: DZ Currency name : DZD
 ISO2 code: EC Currency name : USD
 ISO2 code: CY Currency name : EUR
 ISO2 code: TV Currency name : AUD
 ISO2 code: BW Currency name : BWP
 ISO2 code: GA Currency name : XAF
 ISO2 code: IQ Currency name : IQD
 ISO2 code: BB Currency name : BBD
 ISO2 code: TN Currency name : TND
 ISO2 code: NF Currency name : AUD
 ISO2 code: KE Currency name : KES
 ISO2 code: DM Currency name : XCD
 ISO2 code: JO Currency name : JOD
 ISO2 code: CL Currency name : CLP
 ISO2 code: SK Currency name : EUR
 ISO2 code: AF Currency name : AFN
 ISO2 code: IO Currency name : USD
 ISO2 code: FK Currency name : FKP
 ISO2 code: LR Currency name : LRD
 ISO2 code: TH Currency name : THB
 ISO2 code: GY Currency name : GYD
 ISO2 code: EG Currency name : EGP
 ISO2 code: MS Currency name : XCD
 ISO2 code: NC Currency name : XPF
 ISO2 code: NZ Currency name : NZD
 ISO2 code: CM Currency name : XAF
 ISO2 code: CX Currency name : AUD
 ISO2 code: AI Currency name : XCD
 ISO2 code: AW Currency name : AWG
 ISO2 code: QA Currency name : QAR
 ISO2 code: FJ Currency name : FJD
 ISO2 code: NR Currency name : AUD
 ISO2 code: YT Currency name : EUR
 ISO2 code: LT Currency name : LTL
 ISO2 code: SA Currency name : SAR
 ISO2 code: UG Currency name : UGX
 ISO2 code: CC Currency name : AUD
 ISO2 code: SZ Currency name : SZL
 ISO2 code: KH Currency name : KHR
 ISO2 code: SB Currency name : SBD
 ISO2 code: NO Currency name : NOK
 ISO2 code: BE Currency name : EUR
 ISO2 code: MC Currency name : EUR
 ISO2 code: FR Currency name : EUR
 ISO2 code: LK Currency name : LKR
 ISO2 code: GD Currency name : XCD
 ISO2 code: UY Currency name : UYU
 ISO2 code: BH Currency name : BHD
 ISO2 code: BQ Currency name : USD
 ISO2 code: TT Currency name : TTD
 ISO2 code: WS Currency name : WST
 ISO2 code: GW Currency name : XOF
 ISO2 code: HK Currency name : HKD
 ISO2 code: NG Currency name : NGN
 ISO2 code: BI Currency name : BIF
 ISO2 code: CD Currency name : CDF
 ISO2 code: KI Currency name : AUD
 ISO2 code: LB Currency name : LBP
 ISO2 code: TO Currency name : TOP
 ISO2 code: AG Currency name : XCD
 ISO2 code: IS Currency name : ISK
 ISO2 code: PS Currency name : ILS
 ISO2 code: PA Currency name : PAB
 ISO2 code: CK Currency name : NZD
 ISO2 code: CH Currency name : CHF
 ISO2 code: VG Currency name : USD
 ISO2 code: TZ Currency name : TZS
 ISO2 code: YE Currency name : YER
 ISO2 code: LS Currency name : LSL
 ISO2 code: BF Currency name : XOF
 ISO2 code: BM Currency name : BMD
 ISO2 code: RO Currency name : RON
 ISO2 code: ER Currency name : ERN
 ISO2 code: LI Currency name : CHF
 ISO2 code: VE Currency name : VEF
 ISO2 code: IL Currency name : ILS
 ISO2 code: SS Currency name : SSP
 ISO2 code: SE Currency name : SEK
 ISO2 code: JP Currency name : JPY
 ISO2 code: HN Currency name : HNL
 ISO2 code: PY Currency name : PYG
 ISO2 code: IT Currency name : EUR
 ISO2 code: DE Currency name : EUR
 ISO2 code: ID Currency name : IDR
 ISO2 code: GR Currency name : EUR
 ISO2 code: GG Currency name : GBP
 ISO2 code: PN Currency name : NZD
 ISO2 code: SM Currency name : EUR
 ISO2 code: AM Currency name : AMD
 ISO2 code: TR Currency name : TRY
 ISO2 code: BZ Currency name : BZD
 ISO2 code: TJ Currency name : TJS
 ISO2 code: MW Currency name : MWK
 ISO2 code: FM Currency name : USD
 ISO2 code: KM Currency name : KMF
 ISO2 code: SL Currency name : SLL
 ISO2 code: SD Currency name : SDG
 ISO2 code: HR Currency name : HRK
 ISO2 code: PH Currency name : PHP
 ISO2 code: BD Currency name : BDT
 ISO2 code: VN Currency name : VND
 ISO2 code: NI Currency name : NIO
 ISO2 code: CO Currency name : COP
 ISO2 code: CV Currency name : CVE
 ISO2 code: LU Currency name : EUR
 ISO2 code: BG Currency name : BGN
 ISO2 code: BT Currency name : BTN
 ISO2 code: RW Currency name : RWF
 ISO2 code: GT Currency name : GTQ
 ISO2 code: CU Currency name : CUP
 ISO2 code: JE Currency name : GBP
 ISO2 code: GB Currency name : GBP
 ISO2 code: KN Currency name : XCD
 ISO2 code: IR Currency name : IRR
 ISO2 code: UA Currency name : UAH
 ISO2 code: RS Currency name : RSD
 ISO2 code: GI Currency name : GIP
 ISO2 code: PM Currency name : EUR
 ISO2 code: MD Currency name : MDL
 ISO2 code: TW Currency name : TWD
 ISO2 code: IE Currency name : EUR
 ISO2 code: XK Currency name : EUR
 ISO2 code: ET Currency name : ETB
 ISO2 code: UZ Currency name : UZS
 ISO2 code: CZ Currency name : CZK
 ISO2 code: KW Currency name : KWD
 ISO2 code: AX Currency name : EUR
 ISO2 code: AZ Currency name : AZN
 ISO2 code: SJ Currency name : NOK
 ISO2 code: AD Currency name : EUR
 ISO2 code: JM Currency name : JMD
 ISO2 code: PT Currency name : EUR
 ISO2 code: US Currency name : USD
 ISO2 code: TM Currency name : TMT
 ISO2 code: HT Currency name : HTG
 ISO2 code: LY Currency name : LYD
 ISO2 code: GL Currency name : DKK
 ISO2 code: PW Currency name : USD
 ISO2 code: ML Currency name : XOF
 ISO2 code: MO Currency name : MOP
 ISO2 code: TF Currency name : EUR
 ISO2 code: BO Currency name : BOB
 ISO2 code: GU Currency name : USD
 ISO2 code: ZW Currency name : ZWL
 ISO2 code: CR Currency name : CRC
 ISO2 code: KR Currency name : KRW
 ISO2 code: AU Currency name : AUD
 ISO2 code: TL Currency name : USD
 ISO2 code: SV Currency name : USD
 ISO2 code: ES Currency name : EUR
 ISO2 code: NP Currency name : NPR
 ISO2 code: VA Currency name : EUR

References :

https://www.socketloop.com/tutorials/golang-display-list-of-countries-and-iso-codes