Objective-C

Google Cloud Storage List Buckets

See more Google Cloud Storage Examples

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

#import <CkoJsonObject.h>
#import <CkoHttp.h>
#import <CkoHttpResponse.h>
#import <NSString.h>

BOOL success = NO;

//  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"

CkoJsonObject *jsonToken = [[CkoJsonObject alloc] init];
success = [jsonToken LoadFile: @"qa_data/tokens/googleCloudStorage.json"];
if (success == NO) {
    NSLog(@"%@",jsonToken.LastErrorText);
    return;
}

CkoHttp *http = [[CkoHttp alloc] init];
http.AuthToken = [jsonToken StringOf: @"access_token"];

//  For more info see Cloud Storage Documentation - Buckets: list 
//  
success = [http SetUrlVar: @"PROJECT_ID" value: @"chilkattest-1050"];
CkoHttpResponse *resp = [[CkoHttpResponse alloc] init];
success = [http HttpNoBody: @"GET" url: @"https://www.googleapis.com/storage/v1/b?project={$PROJECT_ID}" response: resp];
if (success == NO) {
    NSLog(@"%@",http.LastErrorText);
    return;
}

int responseCode = [resp.StatusCode intValue];
if (responseCode == 401) {
    NSLog(@"%@",resp.BodyStr);
    NSLog(@"%@",@"If invalid credentials, then it is likely the access token expired.");
    NSLog(@"%@",@"Your app should automatically fetch a new access token and re-try.");
    return;
}

NSLog(@"%@%d",@"Response code: ",responseCode);
NSLog(@"%@",@"Response body");

CkoJsonObject *json = [[CkoJsonObject alloc] init];
success = [json Load: resp.BodyStr];

json.EmitCompact = NO;

NSLog(@"%@",[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

NSString *kind = 0;
int i;
int count_i;
NSString *id = 0;
NSString *selfLink = 0;
NSString *projectNumber = 0;
NSString *name = 0;
NSString *timeCreated = 0;
NSString *updated = 0;
NSString *metageneration = 0;
BOOL iamConfigurationBucketPolicyOnlyEnabled;
NSString *location = 0;
NSString *storageClass = 0;
NSString *etag = 0;

kind = [json StringOf: @"kind"];
i = 0;
count_i = [[json SizeOfArray: @"items"] intValue];
while (i < count_i) {
    json.I = [NSNumber numberWithInt: 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;
}