(Java) Google Cloud Storage List Buckets

See more Google Cloud Storage Examples

Demonstrates how to retrieve a list of buckets for a given project.

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import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    // This example uses a previously obtained access token having permission for the 
    // scope "https://www.googleapis.com/auth/cloud-platform"

    CkJsonObject jsonToken = new CkJsonObject();
    boolean success = jsonToken.LoadFile("qa_data/tokens/googleCloudStorage.json");
    if (success == false) {
        System.out.println(jsonToken.lastErrorText());
        return;
        }

    CkHttp http = new CkHttp();
    http.put_AuthToken(jsonToken.stringOf("access_token"));

    // For more info see Cloud Storage Documentation - Buckets: list 
    // 
    success = http.SetUrlVar("PROJECT_ID","chilkattest-1050");
    CkHttpResponse resp = http.QuickGetObj("https://www.googleapis.com/storage/v1/b?project={$PROJECT_ID}");
    if (http.get_LastMethodSuccess() == false) {
        System.out.println(http.lastErrorText());
        return;
        }

    int responseCode = resp.get_StatusCode();
    if (responseCode == 401) {
        System.out.println(resp.bodyStr());
        System.out.println("If invalid credentials, then it is likely the access token expired.");
        System.out.println("Your app should automatically fetch a new access token and re-try.");

        return;
        }

    System.out.println("Response code: " + responseCode);
    System.out.println("Response body");

    CkJsonObject json = new CkJsonObject();
    success = json.Load(resp.bodyStr());

    json.put_EmitCompact(false);

    System.out.println(json.emit());

    // A response code = 200 indicates success, and the response body contains JSON such as this:

    // {
    //   "kind": "storage#buckets",
    //   "items": [
    //     {
    //       "kind": "storage#bucket",
    //       "id": "chilkat-bucket",
    //       "selfLink": "https://www.googleapis.com/storage/v1/b/chilkat-bucket",
    //       "projectNumber": "5332332985",
    //       "name": "chilkat-bucket",
    //       "timeCreated": "2018-10-23T00:04:44.507Z",
    //       "updated": "2018-10-23T00:04:44.507Z",
    //       "metageneration": "1",
    //       "iamConfiguration": {
    //         "bucketPolicyOnly": {
    //           "enabled": false
    //         }
    //       },
    //       "location": "US",
    //       "storageClass": "MULTI_REGIONAL",
    //       "etag": "CAE="
    //     },
    //     {
    //       "kind": "storage#bucket",
    //       "id": "chilkat-images",
    //       "selfLink": "https://www.googleapis.com/storage/v1/b/chilkat-images",
    //       "projectNumber": "5332332985",
    //       "name": "chilkat-images",
    //       "timeCreated": "2018-10-23T11:24:43.000Z",
    //       "updated": "2018-10-23T11:24:43.000Z",
    //       "metageneration": "1",
    //       "iamConfiguration": {
    //         "bucketPolicyOnly": {
    //           "enabled": false
    //         }
    //       },
    //       "location": "US",
    //       "storageClass": "MULTI_REGIONAL",
    //       "etag": "CAE="
    //     }
    //   ]
    // }

    // Use this online tool to generate parsing code from sample JSON: 
    // Generate Parsing Code from JSON

    String kind;
    int i;
    int count_i;
    String id;
    String selfLink;
    String projectNumber;
    String name;
    String timeCreated;
    String updated;
    String metageneration;
    boolean iamConfigurationBucketPolicyOnlyEnabled;
    String location;
    String storageClass;
    String etag;

    kind = json.stringOf("kind");
    i = 0;
    count_i = json.SizeOfArray("items");
    while (i < count_i) {
        json.put_I(i);
        kind = json.stringOf("items[i].kind");
        id = json.stringOf("items[i].id");
        selfLink = json.stringOf("items[i].selfLink");
        projectNumber = json.stringOf("items[i].projectNumber");
        name = json.stringOf("items[i].name");
        timeCreated = json.stringOf("items[i].timeCreated");
        updated = json.stringOf("items[i].updated");
        metageneration = json.stringOf("items[i].metageneration");
        iamConfigurationBucketPolicyOnlyEnabled = json.BoolOf("items[i].iamConfiguration.bucketPolicyOnly.enabled");
        location = json.stringOf("items[i].location");
        storageClass = json.stringOf("items[i].storageClass");
        etag = json.stringOf("items[i].etag");
        i = i+1;
        }
  }
}