ABAP code calling REST service OAuth2.0 without OA2C

[bhakti2]

hello. all the sample ABAP code snippets i found for calling OAuth2 rest service were with OA2C

i am on older version, i dont have the method execute_cc_flow in class cl_oauth_client. my version in srm 750 sp 20. im told tat i cant use oa2c.

so i have written below code to get the token and i am getting error http 400 "Missing Grant_type"
im looking for how to pass key and parameter , Grant_type = Client credentials while calling the method. Could you please help me with this and tell me if u think im doing right?

thanks in advance.

    data: lo_http_client type ref to if_http_client,
          lo_rest_client type ref to cl_rest_http_client,
          lo_request     type ref to if_rest_entity,
          lo_response    type ref to if_rest_entity,
          lv_url         type        string,
          lv_body        type        string.
    lv_url = 'https://xxxxx.us20.hana.ondemand.com/oauth/token'.
     cl_http_client=>create_by_url(
         exporting
           url                = lv_url
         importing
           client             = lo_http_client
         exceptions
           argument_not_found = 1
           plugin_not_active  = 2
           internal_error     = 3
           others             = 4 ).
    lo_http_client->propertytype_logon_popup = lo_http_client->co_disabled.

    data l_username type string.
    data l_password type string.
    l_username = 'sb-mdm-mdmdev!t557'.
    l_password = 'RhefQVuQe3sDdc4zg1X1ATSQF5g='.
    call method lo_http_client->authenticate
      exporting
        username = l_username
        password = l_password.
* Create REST client instance
    create object lo_rest_client exporting io_http_client = lo_http_client.
* Create request instance
    lo_request = lo_rest_client->if_rest_client~create_request_entity( ).
    lo_http_client->request->set_header_field( name = 'grant_type' value = 'client_credentials' ).
    lo_request->set_content_type( exporting iv_media_type = if_rest_media_type=>gc_appl_www_form_url_encoded ).
* HTTP Post
    lo_rest_client->if_rest_resource~post( lo_request ).
* HTTP response
    lo_response = lo_rest_client->if_rest_client~get_response_entity( ).
    lo_response->set_content_type( exporting iv_media_type = if_rest_media_type=>gc_appl_json ).
* HTTP return status
    data(http_status)   = lo_response->get_header_field( '~status_code' ).
* HTTP JSON return string
    data(json_response) = lo_response->get_string_data( ).

[former_member771070]

Hi Bhakti,

You may try out the client credential options with POSTMAN once to confirm if its working standalone as desired or there is any issue with custom code.

Regarding the OA2C_CONFIG/OA2C_GRANT, I had come across a very nice and detailed wiki page which has step by step details of using 'Authorization code' option and steps relevant to OA2C_GRANT.

https://wiki.scn.sap.com/wiki/display/Security/Access+Google+APIs+using+the+OAuth+2.0+Client+API

This would help you.

Note -

In order to be able to use OA2C_GRANT, you would need the below authorization granted from security perspective

• Object - S_OA2C_USE
  • PROFILE = <OAuth2.0 Client profile you have created>
  • ACTVT = 16

[bhakti2]

thank you . it’s working in my system now . without oa2c . by creating sm59 destination