Zig

Manage Bucket Storage Class

See more Google Cloud Storage Examples

Demonstrates how to manage a bucket's default storage class.

See Cloud Storage Classes for information about storage classes.

Zig

const std = @import("std");
const chilkat = @import("chilkat");

pub fn main(init: std.process.Init) !void {
    const alloc = init.arena.allocator();

    // 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..
    const sb_token = try chilkat.StringBuilder.init();
    defer sb_token.deinit();
    sb_token.loadFile("qa_data/tokens/googleCloudStorageAccessToken.txt", "utf-8") catch {};

    // ---- Step 1
    // Create the JSON body of the PUT request that will be sent.

    // {
    //   "storageClass": "[STORAGE_CLASS]"
    // }
    //

    const json = try chilkat.JsonObject.init();
    defer json.deinit();
    // Be careful if using the "regional" storage class.  See the note below about the 400 error response.
    json.updateString("storageClass", "nearline") catch {};

    // ---- Step 2
    // Send a PUT equivalent to this curl command

    // curl -X PUT --data-binary @[JSON_FILE_NAME].json \
    //     -H "Authorization: Bearer [OAUTH2_TOKEN]" \
    //     -H "Content-Type: application/json" \
    //     "https://www.googleapis.com/storage/v1/b/[BUCKET_NAME]?fields=storageClass"

    const http = try chilkat.Http.init();
    defer http.deinit();
    http.setAuthToken(try sb_token.getAsString(alloc));

    http.setUrlVar("bucket_name", "chilkat-ocean") catch {};
    const url = "https://www.googleapis.com/storage/v1/b/{$bucket_name}?fields=storageClass";
    const resp = try chilkat.HttpResponse.init();
    defer resp.deinit();
    http.httpJson("PUT", url, json, "application/json", resp) catch {
        std.debug.print("{s}\n", .{try http.getLastErrorText(alloc)});
        return;
    };

    const response_code = resp.getStatusCode();
    if (response_code == 401) {
        std.debug.print("{s}\n", .{try resp.getBodyStr(alloc)});
        std.debug.print("If invalid credentials, then it is likely the access token expired.\n", .{});
        std.debug.print("Your app should automatically fetch a new access token and re-try.\n", .{});
        return;
    }

    // On my first try at running this code, I received the following error response:
    // Response code: 400
    // Response body
    // {
    //  "error": {
    //   "errors": [
    //    {
    //     "domain": "global",
    //     "reason": "invalid",
    //     "message": "The combination of locationConstraint and storageClass you provided is not supported for your project"
    //    }
    //   ],
    //   "code": 400,
    //   "message": "The combination of locationConstraint and storageClass you provided is not supported for your project"
    //  }
    // }
    //

    // This was because my storage location was a Multi-regional location, and I tried to assign the "regional" storage class,
    // which is not allowed.

    std.debug.print("Response code: {d}\n", .{response_code});
    std.debug.print("Response body\n", .{});
    std.debug.print("{s}\n", .{try resp.getBodyStr(alloc)});

    // A response code = 200 indicates success, and the response body contains the JSON
    //
    // Response code: 200
    // Response body
    // {
    //  "storageClass": "NEARLINE"
    // }
    //
}