(C#) Google Cloud Storage List Bucket Objects

See more Google Cloud Storage Examples

List the objects in a Google Cloud Storage bucket.

For more information, see https://cloud.google.com/storage/docs/json_api/v1/objects/list

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// 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"

// In this example, Get Google Cloud Storage OAuth2 Access Token, 
// the service account access token was saved to a text file.  This example fetches the access token from the file..
Chilkat.StringBuilder sbToken = new Chilkat.StringBuilder();
sbToken.LoadFile("qa_data/tokens/googleCloudStorageAccessToken.txt","utf-8");

Chilkat.Http http = new Chilkat.Http();
http.AuthToken = sbToken.GetAsString();

// For more info see Cloud Storage Documentation - Objects: list 
// 
bool success = http.SetUrlVar("bucket","chilkat-ocean");
success = http.SetUrlVar("PROJECT_NAME","ChilkatCloud");

Chilkat.HttpResponse resp = http.QuickGetObj("https://www.googleapis.com/storage/v1/b/{$bucket}/o?project={$ChilkatCloud}");
if (http.LastMethodSuccess == false) {
    Debug.WriteLine(http.LastErrorText);
    return;
}

int responseCode = resp.StatusCode;
if (responseCode == 401) {
    Debug.WriteLine(resp.BodyStr);
    Debug.WriteLine("If invalid credentials, then it is likely the access token expired.");
    Debug.WriteLine("Your app should automatically fetch a new access token and re-try.");

    return;
}

Debug.WriteLine("Response code: " + Convert.ToString(responseCode));
Debug.WriteLine("Response body");

Chilkat.JsonObject json = new Chilkat.JsonObject();
success = json.Load(resp.BodyStr);

json.EmitCompact = false;

Debug.WriteLine(json.Emit());

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

// {
//   "kind": "storage#objects",
//   "items": [
//     {
//       "kind": "storage#object",
//       "id": "chilkat-ocean/file with space char.jpg/1555776690752366",
//       "selfLink": "https://www.googleapis.com/storage/v1/b/chilkat-ocean/o/file%20with%20space%20char.jpg",
//       "mediaLink": "https://www.googleapis.com/download/storage/v1/b/chilkat-ocean/o/file%20with%20space%20char.jpg?generation=1555776690752366&alt=media",
//       "name": "file with space char.jpg",
//       "bucket": "chilkat-ocean",
//       "generation": "1555776690752366",
//       "metageneration": "1",
//       "contentType": "image/jpeg",
//       "storageClass": "MULTI_REGIONAL",
//       "size": "6229",
//       "md5Hash": "LpxZ2/JmI2fcl9/dqF2gSA==",
//       "crc32c": "9RjgwQ==",
//       "etag": "CO6WguiH3+ECEAE=",
//       "timeCreated": "2019-04-20T16:11:30.752Z",
//       "updated": "2019-04-20T16:11:30.752Z",
//       "timeStorageClassUpdated": "2019-04-20T16:11:30.752Z"
//     },
//     {
//       "kind": "storage#object",
// 
//       "id": "chilkat-ocean/penguins.jpg/1555775749593296",
//       "selfLink": "https://www.googleapis.com/storage/v1/b/chilkat-ocean/o/penguins.jpg",
//       "mediaLink": "https://www.googleapis.com/download/storage/v1/b/chilkat-ocean/o/penguins.jpg?generation=1555775749593296&alt=media",
//       "name": "penguins.jpg",
//       "bucket": "chilkat-ocean",
//       "generation": "1555775749593296",
//       "metageneration": "1",
//       "contentType": "image/jpeg",
//       "storageClass": "MULTI_REGIONAL",
//       "size": "777835",
//       "md5Hash": "nTd7EM53jEk4s8fixjoimg==",
//       "crc32c": "ixxYVw==",
//       "etag": "CNCxnqeE3+ECEAE=",
//       "timeCreated": "2019-04-20T15:55:49.593Z",
//       "updated": "2019-04-20T15:55:49.593Z",
//       "timeStorageClassUpdated": "2019-04-20T15:55:49.593Z"
//     },
//     {
//       "kind": "storage#object",
//       "id": "chilkat-ocean/starfish.jpg/1628958192639968",
//       "selfLink": "https://www.googleapis.com/storage/v1/b/chilkat-ocean/o/starfish.jpg",
//       "mediaLink": "https://www.googleapis.com/download/storage/v1/b/chilkat-ocean/o/starfish.jpg?generation=1628958192639968&alt=media",
//       "name": "starfish.jpg",
//       "bucket": "chilkat-ocean",
//       "generation": "1628958192639968",
//       "metageneration": "1",
//       "contentType": "image/jpeg",
//       "storageClass": "MULTI_REGIONAL",
//       "size": "6229",
//       "md5Hash": "LpxZ2/JmI2fcl9/dqF2gSA==",
//       "crc32c": "9RjgwQ==",
//       "etag": "COC/tJP2sPICEAE=",
//       "timeCreated": "2021-08-14T16:23:12.660Z",
//       "updated": "2021-08-14T16:23:12.660Z",
//       "timeStorageClassUpdated": "2021-08-14T16:23:12.660Z"
//     }
//   ]
// }

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

string id;
string selfLink;
string mediaLink;
string name;
string bucket;
string generation;
string metageneration;
string contentType;
string storageClass;
string size;
string md5Hash;
string crc32c;
string etag;
string timeCreated;
string updated;
string timeStorageClassUpdated;

string kind = json.StringOf("kind");
int i = 0;
int count_i = json.SizeOfArray("items");
while (i < count_i) {
    json.I = i;
    kind = json.StringOf("items[i].kind");
    id = json.StringOf("items[i].id");
    selfLink = json.StringOf("items[i].selfLink");
    mediaLink = json.StringOf("items[i].mediaLink");
    name = json.StringOf("items[i].name");
    bucket = json.StringOf("items[i].bucket");
    generation = json.StringOf("items[i].generation");
    metageneration = json.StringOf("items[i].metageneration");
    contentType = json.StringOf("items[i].contentType");
    storageClass = json.StringOf("items[i].storageClass");
    size = json.StringOf("items[i].size");
    md5Hash = json.StringOf("items[i].md5Hash");
    crc32c = json.StringOf("items[i].crc32c");
    etag = json.StringOf("items[i].etag");
    timeCreated = json.StringOf("items[i].timeCreated");
    updated = json.StringOf("items[i].updated");
    timeStorageClassUpdated = json.StringOf("items[i].timeStorageClassUpdated");
    i = i + 1;
}