Rust

Refresh QuickBooks OAuth2 Access Token

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Demonstrates how to refresh a QuickBooks OAuth2 access token. Rust

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

// See Get QuickBooks OAuth2 Access Token 
// for sample code showing how to obtain a QuickBooks access token for desktop apps.

// This example assumes we previously obtained an OAuth2 access token for QuickBooks.

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

// The access token JSON looks something like this:

// {
//   "expires_in": 3600,
//   "x_refresh_token_expires_in": 8726400,
//   "refresh_token": "L011546037639r ... 3vR2DrbOmg0Sdagw",
//   "access_token": "eyJlbmMiOiJBMTI4Q0 ... oETJEMbeggg",
//   "token_type": "bearer"
// }

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

oauth2.set_token_endpoint("https://oauth.platform.intuit.com/oauth2/v1/tokens/bearer");

// Replace these with actual values.
oauth2.set_client_id("QUICKBOOKS-CLIENT-ID");
oauth2.set_client_secret("QUICKBOOKS-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.
// The access + refresh tokens contained in this JSON will be needed for the next refresh.
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/qb-access-token.json", "utf-8", false);

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