Twilio is a cloud service for sending and receiving SMS, MMS and voice calls within your application. In this presentation I walked through building a simple service that would help you get out of meetings by sending a "rescue" text message at the right time.

1. Rescue Me!
Make your escape with Twilio

2. Robert Horvick

3. @bubbafat

4. Custom .NET Development and Training

5. How to get out of
meetings

11. Escape

16. Freedom!

17. How would
we do that?

19. SMS
MMS
Voice

20. Enough Talk
Let’s build something

21. public class EchoController : TwilioController
{
[HttpPost]
public ActionResult Index(SmsRequest message)
{
TwilioResponse response = new TwilioResponse();
response.Message(message.Body);
return TwiML(response);
}
}

22. public class EchoController : TwilioController
{
[HttpPost]
public ActionResult Index(SmsRequest message)
{
TwilioResponse response = new TwilioResponse();
response.Message(message.Body);
return TwiML(response);
}
}

23. public class EchoController : TwilioController
{
[HttpPost]
public ActionResult Index(SmsRequest message)
{
TwilioResponse response = new TwilioResponse();
response.Message(message.Body);
return TwiML(response);
}
}

24. public class EchoController : TwilioController
{
[HttpPost]
public ActionResult Index(SmsRequest message)
{
TwilioResponse response = new TwilioResponse();
response.Message(message.Body);
return TwiML(response);
}
}

25. public class EchoController : TwilioController
{
[HttpPost]
public ActionResult Index(SmsRequest message)
{
TwilioResponse response = new TwilioResponse();
response.Message(message.Body);
return TwiML(response);
}
}

26. public class EchoController : TwilioController
{
[HttpPost]
public ActionResult Index(SmsRequest message)
{
TwilioResponse response = new TwilioResponse();
response.Message(message.Body);
return TwiML(response);
}
}

27. TwiML?

28. <?xml version="1.0" encoding="utf-8"?>
<Response>
<Message>The SMS Message!</Message>
</Response>

29. MVC
SMS POST
TwiMLSMS

30. MVC
SMS POST
TwiMLSMS

31. Try It!

32. Security?

33. Things We Know…
URL Path and Query String
POST Parameters
HTTP Headers

34. Things We Hope…
The request is from Twilio

35. X-Twilio-Signature

36. X-Twilio-Signature
URL Path and Query String
POST Parameters
HMAC-SHA1 (Auth Token)

37. Shhhh…
Your authentication token is
a secret.

38. ValidateRequest
Twilio Authentication: The Easy Way

39. Why are we
building APIs using
MVC?

40. Web API

41. Nope!
• MVC Only
• Derives from Controller
• ValidateRequest uses MVC Filters

42. Twilio.WebApi
• Nuget Package
• Derives from ApiController
• ValidateRequest works
• MVC Code-Compatible

43. Web API
It’s easier, right?

44. Sending Messages
It’s even easier

45. Rescue Me!

47. Web Role

48. Web Role
Azure Service Bus Queue
Worker Role

49. Web Role
Azure Service Bus Queue
Worker Role

50. Rescue Me!
Web, Worker and Stuff

51. 919-261-3536