Delphi ActiveX Requires Chilkat v11.5.0+

Box: Get a Service Account Token with Client Credentials

See more Box Examples

Obtain a Box service-account token using the client credentials grant. Configure and authorize a Server app first. Load credentials from protected application configuration; do not ship a client secret in a public client.

See the Box API guide for setup and the complete workflow.

Delphi ActiveX

var
success: Integer;
curl: TChilkatHttpCurl;
authorizedCommand1: TChilkatStringBuilder;
headerReplacement1: Integer;

begin
success := 0;

//  Requires Chilkat 11.5.0 or later and a previously unlocked Chilkat bundle.
//  See Global Unlock Sample.
//  Guide: Box API Guide.

success := 0;

curl := TChilkatHttpCurl.Create(Self);
curl.SetVar('client_id','BOX_CLIENT_ID');
curl.SetVar('client_secret','BOX_CLIENT_SECRET');
curl.SetVar('enterprise_id','BOX_ENTERPRISE_ID');
//  enterprise identifies the app's service account. This is not an admin-user token.
curl.ClearTargetOutput('*');
curl.ClearVar('access_token');
curl.AddTargetOutput('access_token','access_token');
success := curl.DoYourThing('curl -X POST "https://api.box.com/oauth2/token" --data-urlencode "grant_type=client_credentials" --data-urlencode "client_id={{client_id}}" --data-urlencode "client_secret={{client_secret}}" --data-urlencode "box_subject_type=enterprise" --data-urlencode "box_subject_id={{enterprise_id}}"');
if ((success <> 1) or (curl.StatusCode <> 200)) then
  begin
    Memo1.Lines.Add('Box request failed. HTTP status: ' + IntToStr(curl.StatusCode));
    Memo1.Lines.Add('Failure reason: ' + IntToStr(curl.FailReason));
    Exit;
  end;
if (curl.VarDefined('!') <> 1) then
  begin
    Memo1.Lines.Add('Expected response fields are missing.');
    Exit;
  end;
//  Keep this token in protected application memory; reacquire it when it expires.
//  Do not print tokens or the complete token response.
Memo1.Lines.Add('Service-account access token obtained.');
curl.ClearTargetOutput('*');
authorizedCommand1 := TChilkatStringBuilder.Create(Self);
authorizedCommand1.SetString('curl -X GET "https://api.box.com/2.0/users/me?fields=id,name,login" -H "Authorization: Bearer {{access_token}}"');
headerReplacement1 := authorizedCommand1.Replace('{{access_token}}',curl.GetVar('access_token'));
success := curl.DoYourThing(authorizedCommand1.GetAsString());
if ((success <> 1) or (curl.StatusCode <> 200)) then
  begin
    Memo1.Lines.Add('Box request failed. HTTP status: ' + IntToStr(curl.StatusCode));
    Memo1.Lines.Add('Failure reason: ' + IntToStr(curl.FailReason));
    Memo1.Lines.Add(curl.ResponseBodyStr);
    Exit;
  end;
Memo1.Lines.Add(curl.ResponseBodyStr);