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/"}'

C

#include <C_CkJsonObject.h>
#include <C_CkHttp.h>
#include <C_CkHttpResponse.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkJsonObject json;
    HCkHttp http;
    HCkHttpResponse resp;
    HCkJsonObject jsonResp;

    success = FALSE;

    //  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.
    json = CkJsonObject_Create();
    CkJsonObject_UpdateString(json,"grant_type","client_credentials");
    CkJsonObject_UpdateString(json,"client_id","AUTH0-CLIENT-ID");
    CkJsonObject_UpdateString(json,"client_secret","AUTH0-CLIENT-SECRET");
    CkJsonObject_UpdateString(json,"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"
    http = CkHttp_Create();
    resp = CkHttpResponse_Create();
    success = CkHttp_HttpJson(http,"POST","https://chilkat.auth0.com/oauth/token",json,"application/json",resp);
    if (success == FALSE) {
        printf("%s\n",CkHttp_lastErrorText(http));
        CkJsonObject_Dispose(json);
        CkHttp_Dispose(http);
        CkHttpResponse_Dispose(resp);
        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
    //  }
    //  

    printf("response status code = %d\n",CkHttpResponse_getStatusCode(resp));

    //  The repsonse is JSON if successful and also JSON for errors.
    jsonResp = CkJsonObject_Create();
    CkJsonObject_putEmitCompact(jsonResp,FALSE);
    CkJsonObject_Load(jsonResp,CkHttpResponse_bodyStr(resp));

    if (CkHttpResponse_getStatusCode(resp) != 200) {
        //  The response body contains error information in JSON format.
        printf("%s\n",CkJsonObject_emit(jsonResp));

        //  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"
        //  		}
        CkJsonObject_Dispose(json);
        CkHttp_Dispose(http);
        CkHttpResponse_Dispose(resp);
        CkJsonObject_Dispose(jsonResp);
        return;
    }

    printf("Success!\n");
    printf("%s\n",CkJsonObject_emit(jsonResp));

    //  A successful JSON response body looks like this:

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


    CkJsonObject_Dispose(json);
    CkHttp_Dispose(http);
    CkHttpResponse_Dispose(resp);
    CkJsonObject_Dispose(jsonResp);

    }