Rust

RSAP Union API - Get OAuth2 Access Token

See more _Miscellaneous_ Examples

Demonstrates how to get an OAuth2 access token for the RSAP Union API. Note: This uses the client credentials flow, which does NOT require an interactive engagement using a browser. Rust

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

let http = chilkat::Http::new();

// The following JSON is sent in the request body.

// {
//   "grant_type": "client_credentials",
//   "client_id": 1234,
//   "client_secret": "23456abcde"
// }

let json = chilkat::JsonObject::new();
let _ = json.update_string("grant_type", "client_credentials");
let _ = json.update_int("client_id", 1234);
let _ = json.update_string("client_secret", "23456abcde");

http.set_request_header("Content-type", "application/json");

// Add the client certificate TLS authentication.
let cert = chilkat::Cert::new();
if cert.load_from_file("qa_data/certs_and_keys/union_client_certificate.crt").is_err() {
    println!("{}", cert.last_error_text());
    return;
}

let priv_key = chilkat::PrivateKey::new();
if priv_key.load_any_format_file("qa_data/certs_and_keys/union_client_certificate.nopass.key", "").is_err() {
    println!("{}", priv_key.last_error_text());
    return;
}

// Associate the private key with the cert.
// This will fail if the private key is not actually the correct one that corresponds to the public key stored within the cert.
if cert.set_private_key(&priv_key).is_err() {
    println!("{}", cert.last_error_text());
    return;
}

// Tell HTTP to use the cert for client TLS certificate authentication.
if http.set_ssl_client_cert(&cert).is_err() {
    println!("{}", http.last_error_text());
    return;
}

let resp = chilkat::HttpResponse::new();
if http.http_json("POST", "https://api-test.rsap.ca/oauth/token", &json, "application/json", &resp).is_err() {
    println!("{}", http.last_error_text());
    return;
}

let sb_response_body = chilkat::StringBuilder::new();
let _ = resp.get_body_sb(&sb_response_body);
let j_resp = chilkat::JsonObject::new();
let _ = j_resp.load_sb(&sb_response_body);
j_resp.set_emit_compact(false);

println!("Response Body:");
println!("{}", j_resp.emit().unwrap_or_default());

let resp_status_code = resp.status_code();
println!("Response Status Code = {}", resp_status_code);
if resp_status_code >= 400 {
    println!("Response Header:");
    println!("{}", resp.header());
    println!("Failed.");
    return;
}

// Sample JSON response:
// (Sample code for parsing the JSON response is shown below)

// {
//   "token_type": "Bearer",
//   "expires_in": 3600,
//   "access_token": "eyJ0eXAi...LnE"
// }

// This token expires in 1 hour.  Your application could re-use the same token for up to an hour,
// or it can simply get a new access token before each request (if you're not doing too many requests).
let _ = j_resp.write_file("qa_data/tokens/rsapToken.json").is_ok();