How to add Authentication token in HttpRequest in Adaptive dialog?

Question

I am using Botframework adaptive dialog template (c#). I already obtained a token from a HttpRequest and saved it as a conversation state property conversation.token , now I am trying to use this token to make another API call with HttpRequest. But from the official document of HttpRequest Class , it seems there is no options to add the authentication token. I tried to add the token in the Headers, but did not work, it showed 401 Unauthorized error. How should the authorization be handled in HttpRequest in adaptive dialog?

new HttpRequest()
{
    Url = "http://example.com/json",
    ResultProperty = "conversation.httpResponse",
    Method = HttpRequest.HttpMethod.GET,
    ResponseType = HttpRequest.ResponseTypes.Json,
    Headers = new Dictionary<string, AdaptiveExpressions.Properties.StringExpression>()
    {
        {"Authorization", "Bearer ${conversation.token.content.token}"},
    },
},
new SendActivity("${conversation.httpResponse}"),

Answer 1

Instead of using HttpRequest, I made the API call inside CodeAction with custom code. First make a POST request to get the token, then make a GET request to call the main API. In the GET request, the authorization can be added in this way: client.DefaultRequestHeaders.Add("Authorization", "Bearer " + accessToken); .

new CodeAction(async (dc, options) =>
{
    var my_jsondata = new
    {
        Username = "username",
        Password = "password"
    };
    var json = JsonConvert.SerializeObject(my_jsondata);
    var data = new StringContent(json, Encoding.UTF8, "application/json");
    var Tokenurl = "https://example.com/token?HTTP/1.1";
    using var Tokenclient = new HttpClient();
    var Tokenresponse = await Tokenclient.PostAsync(Tokenurl, data);
    string Toeknresult = Tokenresponse.Content.ReadAsStringAsync().Result;
    var Tokenjo = JObject.Parse(Tokenresult);
                                
    using var client = new HttpClient();
    var url = "https://example.com/mainapi?HTTP/1.1";
    var accessToken = Tokenjo["token"];
    client.DefaultRequestHeaders.Add("Authorization", "Bearer " + accessToken);
    var response = await client.GetAsync(url);
    string result = response.Content.ReadAsStringAsync().Result;
                               
    dc.State.SetValue("conversation.httpresponse", response);
    dc.State.SetValue("conversation.result", result);

    return await dc.EndDialogAsync();
}),