Rust Requires Chilkat v10.1.2+

Slack OAuth2

See more OAuth2 Examples

Slack OAuth2 Rust

// For more information about the OAuth2, see OAuth 2.0 Authorization Flow

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

// This example is for desktop applicatons (it is not for code that runs on a web server).

// Your applicaton must use your own public web server as an intermediate
// to receive and forward the redirect to localhost.
// See Using Your Web Server as an Intermediary for OAuth2 Redirect to localhost

// This is the Redirect URL defined for your Slack App in the Slack developer portal, and contains the above PHP.
oauth2.set_app_callback_url("https://yourwebserver.com/oauth2_redirect");
oauth2.set_listen_port(3017);

oauth2.set_authorization_endpoint("https://slack.com/oauth/authorize");
oauth2.set_token_endpoint("https://slack.com/api/oauth.access");

// Replace these with actual values.
oauth2.set_client_id("CLIENT_ID");
oauth2.set_client_secret("CLIENT_SECRET");

oauth2.set_scope("team:read users:read");

// Begin the OAuth2 Authorization code flow.  This returns a URL that should be loaded in a browser.
let Ok(url) = oauth2.start_auth() else {
    println!("{}", oauth2.last_error_text());
    return;
};

println!("url = {}", url);

// Launch the default browser on the system and navigate to the url.
// The LaunchBrowser method was added in Chilkat v10.1.2.
if oauth2.launch_browser(&url).is_err() {
    println!("{}", oauth2.last_error_text());
    return;
}

// Wait for the user to approve or deny authorization in the browser.
let mut num_ms_waited = 0;
while (num_ms_waited < 90000) && (oauth2.auth_flow_state() < 3) {
    oauth2.sleep_ms(100);
    num_ms_waited = num_ms_waited + 100;
}

// If the browser does not respond within the specified time, AuthFlowState will be:
// 
// 1: Waiting for Redirect - The OAuth2 background thread is waiting for the browser's redirect request.
// 2: Waiting for Final Response - The thread is awaiting the final access token response.
// In either case, cancel the background task initiated by StartAuth.

if oauth2.auth_flow_state() < 3 {
    let _ = oauth2.cancel();
    println!("No response from the browser!");
    return;
}

// Check AuthFlowState to determine if authorization was granted, denied, or failed:
// 
// 3: Success - OAuth2 flow completed, the background thread exited, and the successful response is in AccessTokenResponse.
// 4: Access Denied - OAuth2 flow completed, the background thread exited, and the error response is in AccessTokenResponse.
// 5: Failure - OAuth2 flow failed before completion, the background thread exited, and error details are in FailureInfo.

if oauth2.auth_flow_state() == 5 {
    println!("OAuth2 failed to complete.");
    println!("{}", oauth2.failure_info());
    return;
}

if oauth2.auth_flow_state() == 4 {
    println!("OAuth2 authorization was denied.");
    println!("{}", oauth2.access_token_response());
    return;
}

if oauth2.auth_flow_state() != 3 {
    println!("Unexpected AuthFlowState:{}", oauth2.auth_flow_state());
    return;
}

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

// Get the full JSON response:
let json = chilkat::JsonObject::new();
let _ = json.load(&oauth2.access_token_response());
json.set_emit_compact(false);

// The JSON response looks like this:

// {
//   "ok": true,
//   "access_token": "xoxp-348475395242-348621810805-4768936228341-9f512b295124e7c9846ce63cb1464c4d",
//   "scope": "identify,team:read,users:read",
//   "user_id": "UA8HZRUPP",
//   "team_id": "TA3DZBN74",
//   "enterprise_id": null,
//   "team_name": "Chilkat Testing"
// }

println!("{}", json.emit().unwrap_or_default());

// Save the JSON to a file for future requests.
let fac = chilkat::FileAccess::new();
let _ = fac.write_entire_text_file("qa_data/tokens/slack.json", &json.emit().unwrap_or_default(), "utf-8", false);