Bearer Authorization does not work

c_miesenberger
c_miesenberger Member Posts: 5
in NAV Three Tier
I am currently working on an API with GraphQL that uses Bearer tokens for authentication. It's strange because it always works in Postman, but when I try it in Business Central, it doesn't.

It seems like the API doesn't recognize that I want to use Bearer tokens for authentication because I always get some HTML code as a response.

Here is my code:
kpvdhzfsknce.png


Answers

  • ftornero
    ftornero Member Posts: 524
    Hello @c_miesenberger,

    I never use the DefaultRequestHeaders, you can try something like this that works for me
            RequestHeader.Clear();
        HttpRequestMessage.GetHeaders(RequestHeader);
        RequestHeader.Add('Authorization', 'Bearer '  + LunarAPI.GetAccessToken());
...............

    Where RequestHeader is 
    RequestHeader: HttpHeaders;

    Regards.
  • c_miesenberger
    c_miesenberger Member Posts: 5
    Unfortunately, that didn't work either; the same error keeps occurring. However, while debugging, I noticed that the RequestUri of the RequestMessage changes after HttpClient.Send(). Maybe it has something to do with that?
  • SanderDk
    SanderDk Member Posts: 507
    This piece of code works with Bearer tokens, perhaps you can make use of something like this: 
    internal procedure CallAPI(): text
    var
        OccuredErr: Label 'An error occured: %1';
        Client: HttpClient;
        header: HttpHeaders;
        Response: HttpResponseMessage;
        Request: HttpRequestMessage;
        respTxt: text;
    begin
        Request.GetHeaders(header);
        header.Add('Authorization', 'Bearer ' + GetAccessToken());
        Request.Method('GET');
        request.SetRequestUri(BuildURL());
        Client.Send(Request, Response);
        if Response.IsSuccessStatusCode then begin
            Response.Content.ReadAs(respTxt);
            //Handle Reponse here
        end
        else
            Error(OccuredErr, GetLastErrorText())
    end;
    For help, do not use PM, use forum instead, perhaps other people have the same question, or better answers.

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