AdapterWithErrorHandler.cs

// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License.

using System;
using Microsoft.Bot.Builder;
using Microsoft.Bot.Builder.BotFramework;
using Microsoft.Bot.Builder.Integration.AspNet.WebApi;
using Microsoft.Bot.Builder.TraceExtensions;
using Microsoft.Bot.Connector.Authentication;
using Microsoft.Bot.Schema;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Logging;

namespace Microsoft.BotBuilderSamples
{
    public class AdapterWithErrorHandler : BotFrameworkHttpAdapter
    {
        public AdapterWithErrorHandler(ICredentialProvider credentialProvider, ILogger<BotFrameworkHttpAdapter> logger, ConversationState conversationState = null)
            : base(credentialProvider: credentialProvider, logger: logger)
        {
            OnTurnError = async (turnContext, exception) =>
            {
                // Log any leaked exception from the application.
                logger.LogError(exception, $"[OnTurnError] unhandled error : {exception.Message}");

                // Send a message to the user
                var errorMessageText = "The bot encountered an error or bug.";
                var errorMessage = MessageFactory.Text(errorMessageText, errorMessageText, InputHints.ExpectingInput);
                await turnContext.SendActivityAsync(errorMessage);

                errorMessageText = "To continue to run this bot, please fix the bot source code.";
                errorMessage = MessageFactory.Text(errorMessageText, errorMessageText, InputHints.ExpectingInput);
                await turnContext.SendActivityAsync(errorMessage);

                if (conversationState != null)
                {
                    try
                    {
                        // Delete the conversationState for the current conversation to prevent the
                        // bot from getting stuck in a error-loop caused by being in a bad state.
                        // ConversationState should be thought of as similar to "cookie-state" in a Web pages.
                        await conversationState.DeleteAsync(turnContext);
                    }
                    catch (Exception e)
                    {
                        logger.LogError(e, $"Exception caught on attempting to Delete ConversationState : {e.Message}");
                    }
                }

                // Send a trace activity, which will be displayed in the Bot Framework Emulator
                await turnContext.TraceActivityAsync("OnTurnError Trace", exception.Message, "https://www.botframework.com/schemas/error", "TurnError");
            };
        }
    }
}