Rust

Auth0 Server-to-Server Access Token (Client Credentials flow)

See more HTTP Examples

Demonstrates how to obtain an Auth0 access token using client credentials (client_id and client_secret).

This is just a matter of duplicating this CURL command:

curl --request POST
  --url 'https://chilkat.auth0.com/oauth/token' \
  --header 'content-type: application/json' \
  --data '{"grant_type":"client_credentials","client_id": "xxxx","client_secret": "xxxx","audience": "https://api.example.com/geocoding/v1/"}'

Rust

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

// We want to duplicate this curl command:
// 
// curl --request POST
//   --url 'https://chilkat.auth0.com/oauth/token' \
//   --header 'content-type: application/json' \
//   --data '{"grant_type":"client_credentials","client_id": "my_client_id","client_secret": "my_client_secret","audience": "https://api.example.com/geocoding/v1/"}'

// Build the JSON body of the request.
let json = chilkat::JsonObject::new();
let _ = json.update_string("grant_type", "client_credentials");
let _ = json.update_string("client_id", "AUTH0-CLIENT-ID");
let _ = json.update_string("client_secret", "AUTH0-CLIENT-SECRET");
let _ = json.update_string("audience", "https://api.example.com/geocoding/v1/");

// IMPORTANT: You would use your own url.  You would not use "chilkat.auth0.com".  
// Instead you would use "your_name.auth0.com"
let http = chilkat::Http::new();
let resp = chilkat::HttpResponse::new();
if http.http_json("POST", "https://chilkat.auth0.com/oauth/token", &json, "application/json", &resp).is_err() {
    println!("{}", http.last_error_text());
    return;
}

// A 200 response status code indicates success.  In the success case, the response body
// contains the JSON access token, such as: 
// {
//   "access_token": "eyJz93a...k4laUWw",
//   "token_type":"Bearer",
//   "expires_in":86400
// }
// 

println!("response status code = {}", resp.status_code());

// The repsonse is JSON if successful and also JSON for errors.
let json_resp = chilkat::JsonObject::new();
json_resp.set_emit_compact(false);
let _ = json_resp.load(&resp.body_str());

if resp.status_code() != 200 {
    // The response body contains error information in JSON format.
    println!("{}", json_resp.emit().unwrap_or_default());

    // An example of an error response:
    // 		{
    // 		  "error": "access_denied",
    // 		  "error_description": "Client is not authorized to access \"https://api.example.com/geocoding/v1/\". You might probably want to create a \"client-grant\" associated to this API. See: https://auth0.com/docs/api/v2#!/Client_Grants/post_client_grants"
    // 		}
    return;
}

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

// A successful JSON response body looks like this:

// {
//   "access_token": "eyJz93a...k4laUWw",
//   "token_type":"Bearer",
//   "expires_in":86400
// }