Bot Framework C# Luis Getting > Exception: Response status code does not indicate success: 400 (Bad Request)

Question

I need assistance with integrating my Luis App into C# Bot Framework Bot

When I add Luis App to my C# Microsoft Bot Framework chatbot and run in the emulator I get an exception.

Exception: Response status code does not indicate success: 400 (Bad Request).

A debugging post from another developer on Github suggested adding domain, which I have to my LuisModel (see below). This did not resolve the issue.

[LuisModel("", "", domain: "australiaeast.api.cognitive.microsoft.com", Staging = true)]

Stepping through the code, my locals seem correct when it calls the new Dialog.RootLuisDialog() Here is a screen grab

Message Controller Code Snippet

public async Task<HttpResponseMessage> Post([FromBody] Activity activity)
{
    // check if activity is of type message
    if (activity.Type == ActivityTypes.Message)
    {
        await Conversation.SendAsync(activity, () => new Dialogs.RootLuisDialog());
    }
    else
    {
        HandleSystemMessage(activity);
    }
    var response = Request.CreateResponse(HttpStatusCode.OK);
    return response;
}

Luis Dialog Class

namespace HalChatBot.Dialogs
{
        [LuisModel("<MyLuisAppID>", "<MyLuisKey>", 
            domain: "australiaeast.api.cognitive.microsoft.com", Staging = true)]
        [Serializable]
        public class RootLuisDialog : LuisDialog<object>
        {
            [LuisIntent("")]
            [LuisIntent("None")]
            public async Task None(IDialogContext context, LuisResult result)
            {
                await context.PostAsync("I am the Default intent");
                context.Wait(MessageReceived);
            }

           [LuisIntent("Greeting")]
           public async Task Greeting(IDialogContext context, LuisResult result)
           {
                await context.PostAsync("I am the Greeting intent");
                context.Wait(MessageReceived);
           }
        }
}

HTTP error 400 means the server tells you it doesn't like what you sent (or doesn't understand it). You can use a tool such as fiddler to check if it sent additional info in the HTTP response body so you can fix your code. — Simon Mourier
Thanks @SimonMourier, Fiddler shows Model not published. Please publish your model before hitting the Endpoint. I have published the Luis App and just went back and republished. Any other ideas? — Adam
If it keeps telling you your model is published, nope, beside checking you published the proper model :-) — Simon Mourier

Adam Adam · Accepted Answer · 2018-04-03T09:19:05

Ran fiddler, encrypted 400 (Bad Request) which stated Model not published. Please publish your model before hitting the endpoint
Republished MyLuisApp
Removed staging from LuisModel [LuisModel("<MyLuisAppID>", "<MyLuisKey>", domain: "australiaeast.api.cognitive.microsoft.com")]

Now Luis integration is working.

Bot Framework C# Luis Getting > Exception: Response status code does not indicate success: 400 (Bad Request)

1 Answers