Zig

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/"}'

Zig

const std = @import("std");
const chilkat = @import("chilkat");

pub fn main(init: std.process.Init) !void {
    const alloc = init.arena.allocator();

    // 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.
    const json = try chilkat.JsonObject.init();
    defer json.deinit();
    json.updateString("grant_type", "client_credentials") catch {};
    json.updateString("client_id", "AUTH0-CLIENT-ID") catch {};
    json.updateString("client_secret", "AUTH0-CLIENT-SECRET") catch {};
    json.updateString("audience", "https://api.example.com/geocoding/v1/") catch {};

    // IMPORTANT: You would use your own url.  You would not use "chilkat.auth0.com".
    // Instead you would use "your_name.auth0.com"
    const http = try chilkat.Http.init();
    defer http.deinit();
    const resp = try chilkat.HttpResponse.init();
    defer resp.deinit();
    http.httpJson("POST", "https://chilkat.auth0.com/oauth/token", json, "application/json", resp) catch {
        std.debug.print("{s}\n", .{try http.getLastErrorText(alloc)});
        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
    // }
    //

    std.debug.print("response status code = {d}\n", .{resp.getStatusCode()});

    // The repsonse is JSON if successful and also JSON for errors.
    const json_resp = try chilkat.JsonObject.init();
    defer json_resp.deinit();
    json_resp.setEmitCompact(false);
    json_resp.load(try resp.getBodyStr(alloc)) catch {};

    if (resp.getStatusCode() != 200) {
        // The response body contains error information in JSON format.
        std.debug.print("{s}\n", .{try json_resp.emit(alloc)});

        // 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;
    }

    std.debug.print("Success!\n", .{});
    std.debug.print("{s}\n", .{try json_resp.emit(alloc)});

    // A successful JSON response body looks like this:

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