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Saturday, January 7, 2017

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BotFramework: Quick Start

[UPDATE: this blog was moved to a new one]

Quick Overview

Instead of having you reading all the official documentation, I hope this gives you a good starting point.

What is BotFramework?

It is a framework developed by Microsoft that allows devs to create bots that can interact with users in a natural way. It can be used in a website, app, Skype, Slack, Facebook Messenger, and many others.

What can a bot do?

The idea behind is that the users of your application (whatever and wherever it is) will be able to get stuff done trhough a conversation with your bot. It is not only empowered to just give an answer, but to show rich information, propose actions, execute commands, etc.

How does it work?

Basically, with the open-source SDK we'll be using, we create a REST API that receives and sends back known models (schemas) that we will discuss later.

What do I need to get started?

*Note that we are covering the .Net path, but it is also possible to do it with Node.js or via REST API.
Only few things:
  • Visual Studio 2015 with all the extensions updated
  • The BotFramework Template: Download it and put the zip in "%USERPROFILE%\Documents\Visual Studio 2015\Templates\ProjectTemplates\Visual C#\"
  • Now in Visual Studio, when creating a new project you should see in C# templates the Bot Application template
  • Download the BotFramework Emulator 
You could have more (app registration with Microsoft Bot Framework, Azure, etc), but to have your first hands-on, this is more than enough.

Enough of talking, hands on!

Yes, sorry. Let's start. Follow along this steps and in 10 minutes you should have your first bot working.

Create the Bot

 Open Visual Studio and create a new project based on Bot Application template we just installed.

The code you get

You get a fully functioning  Bot. The template as of the day of the writing of this article, in the controllers/messages controller, has a built-in Post method that receives an Activity. The only implemented path is the one where the Activity is of type Message. In this case, the code counts the number of characters of the Message's Text and creates the Activity that will be sent back as an answer with the text telling the lenght of the message received. 

In my case, I changed it a bit. As of today, it has a hardcoded (I know... that is a forbidden word!) greeting and a call to an external API to generate a random person identity, like this:

You can find the code on my Github (but it might have evolved!)

How to test it

Go ahead and run the application (in my case, Chrome is the default browser). You will see the following screen

Now, go ahead and open the BotFramework Emulator app. Click on the blue top bar and enter the URL where your application was launched (remember to include the port and to add "api/messages"), just like this:

As we did not register our app yet, leave the Microsoft App Id and Microsoft App Password fields empty, and click Connect:

Now you should be able to just enter a message in the text box that appears in the bottom and get the answer from your Bot with how many characters you have sent. You can normally debug your bot by setting breakpoints anywhere in your code, and the emulator gives you good hints on what errors might happen. A successful conversation should look like the picture below:

Cool! Now, what?

That is a great question. Picture all the possibilities this brings you and your users. I can think of tons of useful use cases. Next step will be to dive a bit on what kind of features we can give to our bot (starting from the built-in we find in the SDK and extending it with Microsoft Cognitive Services), how to publish it and how to integrate it in different places. 

As usual, any feedback is very welcomed. Hope you liked it!

About Nereo Lopez

Hi, this is Nereo. I've spent my first professional years as .Net Software Engineer, and then moved more into Agile Methodologies. Anyway, I keep playing with all the new technologies that appear, and specially love Hybrid Apps!

2 comentarios:

  1. Great post! Very aclaratory! It is a great way to get started with the Bot Framework! Hope to see soon an integration with the mighty Microsoft's LUIS!