Zig

Get Access Token for Google Tasks using Service Account JSON Key

See more Google Tasks Examples

Demonstrates how to get an access token for the Google Tasks API using a Service Account JSON key. 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.

    // First load the JSON key into a string.
    const fac = try chilkat.FileAccess.init();
    defer fac.deinit();
    const json_key = fac.readEntireTextFile(alloc, "qa_data/googleSvcAccountKeys/ChilkatCloud-48f7737c7505.json", "utf-8") catch {
        std.debug.print("{s}\n", .{try fac.getLastErrorText(alloc)});
        return;
    };

    // A JSON private key should look like this:

    // {
    //   "type": "service_account",
    //   "project_id": "chilkatcloud",
    //   "private_key_id": "48f7737c7505bb88eee6a20d09993e10605d466e",
    //   "private_key": "-----BEGIN PRIVATE KEY----- ... -----END PRIVATE KEY-----\n",
    //   "client_email": "pip-564@chilkatcloud.iam.gserviceaccount.com",
    //   "client_id": "109982228323456925225",
    //   "auth_uri": "https://accounts.google.com/o/oauth2/auth",
    //   "token_uri": "https://oauth2.googleapis.com/token",
    //   "auth_provider_x509_cert_url": "https://www.googleapis.com/oauth2/v1/certs",
    //   "client_x509_cert_url": "https://www.googleapis.com/robot/v1/metadata/x509/pip-564%40chilkatcloud.iam.gserviceaccount.com"
    // }

    const g_auth = try chilkat.AuthGoogle.init();
    defer g_auth.deinit();
    g_auth.setJsonKey(json_key);

    // Choose the scope for read/write access.
    g_auth.setScope("https://www.googleapis.com/auth/tasks");

    // Request an access token that is valid for this many seconds.
    g_auth.setExpireNumSeconds(3600);

    g_auth.setSubEmailAddress("");

    // Connect to www.googleapis.com using TLS
    const tls_sock = try chilkat.Socket.init();
    defer tls_sock.deinit();
    tls_sock.connect("www.googleapis.com", 443, true, 5000) catch {
        std.debug.print("{s}\n", .{try tls_sock.getLastErrorText(alloc)});
        return;
    };

    // Send the request to obtain the access token.
    g_auth.obtainAccessToken(tls_sock) catch {
        std.debug.print("{s}\n", .{try g_auth.getLastErrorText(alloc)});
        return;
    };

    // Examine the access token:
    std.debug.print("Access Token: {s}\n", .{try g_auth.getAccessToken(alloc)});

    // Save our access token to a file.
    try fac.writeEntireTextFile("qa_data/tokens/googleTasks.txt", try g_auth.getAccessToken(alloc), "utf-8", false);
}