Rust

PayPal - Generate Invoice Number

See more PayPal Examples

Generates the next invoice number that is available to the user.

Note: This example requires Chilkat v9.5.0.65 or greater.

Rust

// Note: Requires Chilkat v9.5.0.65 or greater.

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

// Load our previously obtained access token. (see PayPal OAuth2 Access Token)
let json_token = chilkat::JsonObject::new();
let _ = json_token.load_file("qa_data/tokens/paypal.json");

// Build the Authorization request header field value.
let sb_auth = chilkat::StringBuilder::new();
// token_type should be "Bearer"
let _ = sb_auth.append(&json_token.string_of("token_type").unwrap_or_default());
let _ = sb_auth.append(" ");
let _ = sb_auth.append(&json_token.string_of("access_token").unwrap_or_default());

// Make the initial connection.
// A single REST object, once connected, can be used for many PayPal REST API calls.
// The auto-reconnect indicates that if the already-established HTTPS connection is closed,
// then it will be automatically re-established as needed.
let rest = chilkat::Rest::new();
let b_auto_reconnect = true;
if rest.connect("api.sandbox.paypal.com", 443, true, b_auto_reconnect).is_err() {
    println!("{}", rest.last_error_text());
    return;
}

// ----------------------------------------------------------------------------------------------
// The code above this comment could be placed inside a function/subroutine within the application
// because the connection does not need to be made for every request.  Once the connection is made
// the app may send many requests..
// ----------------------------------------------------------------------------------------------

// Clear the REST object of any headers or query params from previous requests.
let _ = rest.clear_all_headers();
let _ = rest.clear_all_query_params();

let _ = rest.add_header("Authorization", &sb_auth.get_as_string().unwrap_or_default());

// Send the POST request with an emtpy body and get the JSON response.
let sb_json_request = chilkat::StringBuilder::new();
let sb_json_response = chilkat::StringBuilder::new();
if rest.full_request_sb("POST", "/v1/invoicing/invoices/next-invoice-number", &sb_json_request, &sb_json_response).is_err() {
    println!("{}", rest.last_error_text());
    return;
}

let json = chilkat::JsonObject::new();
json.set_emit_compact(false);
let _ = json.load_sb(&sb_json_response);

println!("Response Status Code = {}", rest.response_status_code());

// Did we get a 200 success response?
if rest.response_status_code() != 200 {
    println!("{}", json.emit().unwrap_or_default());
    println!("Failed.");
    return;
}

// Sample JSON response is shown below.
println!("{}", json.emit().unwrap_or_default());
println!("----------------------");
println!("Next invoice number: {}", json.string_of("number").unwrap_or_default());
println!("success");

// ------------------------------------------------
// A sample JSON response:

// 	{ 
// 	  "number": "0003"
// 	}