Rust

Hotmail Refresh Access Token (also for Live.com, Outlook.com)

See more OAuth2 Examples

An OAuth2 access token is typically valid for 1 hour. Interaction with the Hotmail account owner via a browser is only needed for getting the initial access token. Once you have it, it can be continually refreshed without user interaction for a long time.

See: How Long can an OAuth2 Access Token be Refreshed?

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.

// Note: Refreshing an access token does not require user-interaction.  
// Only the act of getting the initial access token requires interactive authorization from the Hotmail account owner 
// (i.e. a browser is displayed and the Hotmail account owner authorizes access by the app).

// Once you have the initial access token, it can be refreshed for a long time.
// A typical strategy is to write your application to automatically refresh the access token 
// when authentication fails, and then retry the operation with the new access token.

let json_token = chilkat::JsonObject::new();
if json_token.load_file("qa_data/tokens/hotmail.json").is_err() {
    println!("Failed to load office365.json");
    return;
}

// The access token JSON looks like this:

// {
//   "token_type": "Bearer",
//   "scope": "https://outlook.office.com/SMTP.Send https://outlook.office.com/IMAP.AccessAsUser.All https://outlook.office.com/POP.AccessAsUser.All",
//   "expires_in": 3600,
//   "ext_expires_in": 3600,
//   "access_token": "EwBoA+ ... 7pOYcWr5pFwQgI=",
//   "refresh_token": "M.C546_BL2.0.U.-CkW ... g5CKSlDBQ$$",
//   "id_token": "eyJ0e ... 2iiu5iqBK9n7s3A"
// }

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

// See Microsoft OAuth2 Authorization Endpoint
oauth2.set_token_endpoint("https://login.microsoftonline.com/common/oauth2/v2.0/token");

// Replace this with your actual App Registration's Application (client) ID.
oauth2.set_client_id("CLIENT_ID");

// 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;
}

println!("{}", oauth2.last_error_text());

println!("New access token: {}", oauth2.access_token());
println!("New refresh token: {}", oauth2.refresh_token());

// Update the JSON with the new tokens.
let _ = json_token.update_string("access_token", &oauth2.access_token());
let _ = json_token.update_string("refresh_token", &oauth2.refresh_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/hotmail.json", "utf-8", false);

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