Rust

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. Rust

// 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.
let fac = chilkat::FileAccess::new();
let Ok(json_key) = fac.read_entire_text_file("qa_data/googleSvcAccountKeys/ChilkatCloud-48f7737c7505.json", "utf-8") else {
    println!("{}", fac.last_error_text());
    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"
// }

let g_auth = chilkat::AuthGoogle::new();
g_auth.set_json_key(&json_key);

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

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

g_auth.set_sub_email_address("");

// Connect to www.googleapis.com using TLS
let tls_sock = chilkat::Socket::new();
if tls_sock.connect("www.googleapis.com", 443, true, 5000).is_err() {
    println!("{}", tls_sock.last_error_text());
    return;
}

// Send the request to obtain the access token.
if g_auth.obtain_access_token(&tls_sock).is_err() {
    println!("{}", g_auth.last_error_text());
    return;
}

// Examine the access token:
println!("Access Token: {}", g_auth.access_token());

// Save our access token to a file.
let _ = fac.write_entire_text_file("qa_data/tokens/googleTasks.txt", &g_auth.access_token(), "utf-8", false).is_ok();