Rust

Google People API Refresh Access Token

See more Google People Examples

Demonstrates how to refresh a Google Access Token for the Google People API. Rust

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

// It is assumed we previously obtained an OAuth2 access token.
// This example loads the JSON access token file 
// saved by this example: Get Google People API OAuth2 Access Token

let json_token = chilkat::JsonObject::new();
if json_token.load_file("qa_data/tokens/googlePeople.json").is_err() {
    println!("Failed to load googlePeople.json");
    return;
}

// The access token JSON looks like this:

// {
//   "access_token": "ya29.a0AfH6S ... LAZYFUkf0",
//   "expires_in": 3599,
//   "refresh_token": "1//0fL_Ov ... ee0",
//   "scope": "https://www.googleapis.com/auth/contacts",
//   "token_type": "Bearer"
// }

let oauth2 = chilkat::OAuth2::new();

oauth2.set_token_endpoint("https://www.googleapis.com/oauth2/v4/token");

// Replace these with actual values.
oauth2.set_client_id("GOOGLE-CLIENT-ID");
oauth2.set_client_secret("GOOGLE-CLIENT-SECRET");

// Get the "refresh_token"
oauth2.set_refresh_token(&json_token.string_of("refresh_token").unwrap_or_default());

// Send the HTTP POST to refresh the access token..
if oauth2.refresh_access_token().is_err() {
    println!("{}", oauth2.last_error_text());
    return;
}

// The response contains a new access token, but we must keep
// our existing refresh token for when we need to refresh again in the future.
let _ = json_token.update_string("access_token", &oauth2.access_token());

// Save the new JSON access token response to a file.
let sb_json = chilkat::StringBuilder::new();
json_token.set_emit_compact(false);
let _ = json_token.emit_sb(&sb_json);
let _ = sb_json.write_file("qa_data/tokens/googlePeople.json", "utf-8", false);

println!("OAuth2 authorization granted!");
println!("New Access Token = {}", oauth2.access_token());