curl --request GET \
  --url https://api.ext.lyseo.com/v1/purchaseOrders/{reference}

import requests

url = "https://api.ext.lyseo.com/v1/purchaseOrders/{reference}"

response = requests.get(url)

print(response.text)

const options = {method: 'GET'};

fetch('https://api.ext.lyseo.com/v1/purchaseOrders/{reference}', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.ext.lyseo.com/v1/purchaseOrders/{reference}",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "GET",
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"net/http"
	"io"
)

func main() {

	url := "https://api.ext.lyseo.com/v1/purchaseOrders/{reference}"

	req, _ := http.NewRequest("GET", url, nil)

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.get("https://api.ext.lyseo.com/v1/purchaseOrders/{reference}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.ext.lyseo.com/v1/purchaseOrders/{reference}")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Get.new(url)

response = http.request(request)
puts response.read_body

{
  "po_number": "PO5792303",
  "supplier_name": "Detroit Factory",
  "purchase_order_lines": [
    {
      "reference": "Delivery #1",
      "product": {
        "sku": "REF0123458",
        "name": "blue t-shirt",
        "hs_code": "96032930",
        "description": "blue shirt with a T shape",
        "is_hazardous": "false",
        "hazardous_description": "UN1993",
        "custom_parameters": [
          {
            "name": "parameter1",
            "value": "value1"
          }
        ]
      },
      "ordered_quantity": 500,
      "unit_price": {
        "amount": 150357.99,
        "currency": "USD"
      },
      "assigned_order_lines": [
        {
          "lyseo_shipment_id": "BATE",
          "assigned_quantity": 200,
          "shipped_order_lines": [
            {
              "container_number": "HLCU1234567",
              "shipped_quantity": 150,
              "packaging_total_volume": 5,
              "number_of_packages": 10,
              "packaging_type": "box",
              "net_weight": 100,
              "gross_weight": 110,
              "volume_unit": "m3",
              "weight_unit": "kg"
            }
          ]
        }
      ]
    }
  ],
  "desired_ex_factory_date": "2021-10-11",
  "desired_delivery_date": "2021-10-11",
  "custom_parameters": [
    {
      "name": "parameter1",
      "value": "value1"
    }
  ]
}

{}