Java
Chilkat2 Java
Google Cloud Storage List Bucket Objects
See more Google Cloud Storage Examples
List the objects in a Google Cloud Storage bucket.Chilkat Java Downloads
import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.Http;
import com.chilkatsoft.chilkat2.HttpResponse;
import com.chilkatsoft.chilkat2.JsonObject;
import com.chilkatsoft.chilkat2.StringBuilder;
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"
// 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..
StringBuilder sbToken = new StringBuilder();
sbToken.loadFile("qa_data/tokens/googleCloudStorageAccessToken.txt", "utf-8");
Http http = new Http();
http.setAuthToken(sbToken.getAsString());
// For more info see Cloud Storage Documentation - Objects: list
//
http.setUrlVar("bucket", "chilkat-ocean");
http.setUrlVar("PROJECT_NAME", "ChilkatCloud");
HttpResponse resp = new HttpResponse();
try {
http.httpNoBody("GET", "https://www.googleapis.com/storage/v1/b/{$bucket}/o?project={$ChilkatCloud}", 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#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.setI(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;
}
}
}