Compute Nest:Validate service instance validity

import requests
import json
import hashlib
import time
import sys
from urllib.request import urlopen

def get_region_id():
    """Get the region ID (for example, cn-hangzhou) from the Alibaba Cloud metadata service."""
    try:
        with urlopen(
            "http://100.100.100.200/latest/meta-data/region-id",
            timeout=2
        ) as response:
            return response.read().decode().strip()
    except Exception as e:
        print(f"Failed to get region ID: {str(e)}", file=sys.stderr)
        sys.exit(1)

def checkout_license():
    # Dynamically get the region ID and build the URL.
    region_id = get_region_id()
    url = f"https://{region_id}.axt.aliyun.com/computeNest/license/check_out_license"

    # Send the POST request.
    try:
        response = requests.post(
            url,
            json={
              # Optional: Include ServiceId to scope the check to a specific service.
              # If omitted, Compute Nest identifies the service from resource tags.
              # "ServiceId": "service-ec9cbf77f9be443db938"
            },
            headers={"Content-Type": "application/json"}
        )
        print(f"Request URL: {url}")
        print(f"Status Code: {response.status_code}")
        print(f"Response: {response.text}")
    except Exception as e:
        print(f"Request Failed: {str(e)}", file=sys.stderr)

if __name__ == "__main__":
    # Call the function.
    checkout_license()

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.security.MessageDigest;     

public class CheckoutLicense {
    public static void main(String[] args) {
        try {
            // === Dynamically get the region ID ===
            String regionId = getRegionId();
            System.out.println("Detected Region ID: " + regionId);

            String checkoutLicenseString = "{}";
            // Optional: Include ServiceId to scope the check to a specific service.
            // If omitted, Compute Nest identifies the service from resource tags.
            // String checkoutLicenseString = "{\"ServiceId\": \"service-ec9cbf77f9be443db938\"}";

            // === Send the POST request ===
            String urlStr = "https://" + regionId + ".axt.aliyun.com/computeNest/license/check_out_license";
            URL url = new URL(urlStr);
            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
            conn.setRequestMethod("POST");
            conn.setRequestProperty("Content-Type", "application/json");
            conn.setDoOutput(true);

            try (OutputStream os = conn.getOutputStream()) {
                byte[] input = checkoutLicenseString.getBytes("UTF-8");
                os.write(input, 0, input.length);
            }

            // === Read the response ===
            try (BufferedReader br = new BufferedReader(new InputStreamReader(conn.getInputStream()))) {
                StringBuilder response = new StringBuilder();
                String responseLine;
                while ((responseLine = br.readLine()) != null) {
                    response.append(responseLine);
                }
                System.out.println("Response: " + response.toString());
            }
            conn.disconnect();
            System.out.println("Request URL: " + urlStr);

        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    // === Get the region ID from the Alibaba Cloud metadata service ===
    private static String getRegionId() throws Exception {
        String regionIdUrl = "http://100.100.100.200/latest/meta-data/region-id";
        HttpURLConnection conn = (HttpURLConnection) new URL(regionIdUrl).openConnection();
        conn.setRequestMethod("GET");
        conn.setConnectTimeout(2000); // 2-second timeout
        conn.setReadTimeout(2000);

        try (BufferedReader in = new BufferedReader(
            new InputStreamReader(conn.getInputStream()))) {
            return in.readLine().trim();
        }
    }
}