Java

Google Cloud Storage List Buckets

See more Google Cloud Storage Examples

Demonstrates how to retrieve a list of buckets for a given project. Chilkat2 Java

import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.Http;
import com.chilkatsoft.chilkat2.HttpResponse;
import com.chilkatsoft.chilkat2.JsonObject;

public class ChilkatExample {

    public static void main(String[] args) {
        // 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"

        JsonObject jsonToken = new JsonObject();
        try {
            jsonToken.loadFile("qa_data/tokens/googleCloudStorage.json");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        Http http = new Http();
        http.setAuthToken(jsonToken.stringOf("access_token"));

        // For more info see Cloud Storage Documentation - Buckets: list 
        //
        http.setUrlVar("PROJECT_ID", "chilkattest-1050");
        HttpResponse resp = new HttpResponse();
        try {
            http.httpNoBody("GET", "https://www.googleapis.com/storage/v1/b?project={$PROJECT_ID}", resp);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        int responseCode = resp.getStatusCode();
        if (responseCode == 401) {
            System.out.println(resp.getBodyStr());
            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");

        JsonObject json = new JsonObject();
        json.load(resp.getBodyStr());

        json.setEmitCompact(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 id = "";
        String selfLink = "";
        String projectNumber = "";
        String name = "";
        String timeCreated = "";
        String updated = "";
        String metageneration = "";
        boolean iamConfigurationBucketPolicyOnlyEnabled = false;
        String location = "";
        String storageClass = "";
        String etag = "";

        String kind = json.stringOf("kind");
        int i = 0;
        int count_i = json.sizeOfArray("items");
        while (i < count_i) {
            json.setI(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;
        }
    }
}