Objective-C

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/"}'

Objective-C

#import <CkoJsonObject.h>
#import <CkoHttp.h>
#import <CkoHttpResponse.h>

BOOL success = NO;

//  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.
CkoJsonObject *json = [[CkoJsonObject alloc] init];
[json UpdateString: @"grant_type" value: @"client_credentials"];
[json UpdateString: @"client_id" value: @"AUTH0-CLIENT-ID"];
[json UpdateString: @"client_secret" value: @"AUTH0-CLIENT-SECRET"];
[json UpdateString: @"audience" value: @"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"
CkoHttp *http = [[CkoHttp alloc] init];
CkoHttpResponse *resp = [[CkoHttpResponse alloc] init];
success = [http HttpJson: @"POST" url: @"https://chilkat.auth0.com/oauth/token" json: json contentType: @"application/json" response: resp];
if (success == NO) {
    NSLog(@"%@",http.LastErrorText);
    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
//  }
//  

NSLog(@"%@%d",@"response status code = ",[resp.StatusCode intValue]);

//  The repsonse is JSON if successful and also JSON for errors.
CkoJsonObject *jsonResp = [[CkoJsonObject alloc] init];
jsonResp.EmitCompact = NO;
[jsonResp Load: resp.BodyStr];

if ([resp.StatusCode intValue] != 200) {
    //  The response body contains error information in JSON format.
    NSLog(@"%@",[jsonResp Emit]);

    //  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;
}

NSLog(@"%@",@"Success!");
NSLog(@"%@",[jsonResp Emit]);

//  A successful JSON response body looks like this:

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