Modern Web 2016

Using Golang to build smart IM Bot

Evan Lin @LinkerNetworkshttp://goo.gl/IYv1BU

About Me• Cloud Architect @ Linker

Networks • Top 10 Taiwan Golang open

source contributor (github award)

• Developer, Curator, Blogger

Agenda• What is IM Bot • Introduce Golang

• Build Line Bot

• Build FB Bot

• Build a smart IM Bot • Future

• Q&A

Instant Message Bot

What is IM? (Instant Messenger)

What is IM Bot?

How to choose programming language

• Easy to Write • Fast in Run and

Compile • Powerful Concurrency • Powerful Built-in

Toolchain

Pokemon GO

Programming GO

What is Go(lang)• Create by Google • Design by

• Ken Thompson • Rob Pike • Robert Griesemer,

• Feature:

• Compiled • Statically Typed • Garbage Collection

Why Golang

• GO Fast! • Compile Fast! • Run Fast!

Go is Fast

Why Golang

• Make programming fun again.

gofmt / goimport

Before we look code

Before we look code (cont)

After file save..

Go Vet Analysis on source code and reports

suspicious constructs.

Go Lint Coding style suggestions

GoRoutine: Multiple Thread in C

GoRoutine: Multiple Thread in Go

GoRoutine and Channel: Multiple Thread in Go

GoRoutine and Channel: Multiple Thread in Go

GoRoutine and Channel: Multiple Thread in Go

https://talks.golang.org/2014/gocon-tokyo.slide

Golang - HTTPS Server

Golang - HTTPS Server

Supported HTTP/2

After Go 1.6

Golang - Built-In Test

Golang - Built-In Benchmark Test

GoMobileOriginal Work Flow

Golang Sample Console

Sometime Failed

Work

Failed on Some Model

GoMobileUsing Golang in Mobile

GolangGoMobilePackage

Golang Sample Console

Go Playground: Write A snippet Go code online

https://play.golang.org/

Go JSON Tutorial

Go JSON Tutorial

Go JSON Tutorial

Golang IDE (Integrated Development Environment)

Golang IDE (Integrated Development Environment)

VIM-GO

Golang IDE (Integrated Development Environment)

Visual Studio Code Go Extension

Let’s build IM Bot.

Wait! What is IM Bot working

flow?

IM Bot Working Flow:

HTTPS Webhook

How to prepare HTTPS server?

• Prepare a machine with public IP

• Install related OS and runtime for your programming language

• Purchase CA signed for SSL Key ($$)

• Run a HTTPS Webserver (Apache or Go native Web Server)

Introduce Heroku (Platform As A Service)

Free-tier

Heroku (Platform As A Service)

• Free-tier: • USES AN ACCOUNT-

BASED POOL

• OF FREE DYNO HOURS

• SLEEPS AFTER 30 MINS OF INACTIVITY

• CUSTOM DOMAINS

• HTTPS connection (for non-custom domains)

• Support one click deploy

IM Bot Working Flow (update)

HTTPS Webhook

Build IM Line Bot

Step 1: Request Line Bot Trial AccountApply Line Bot trial account here

(Only 1 per Line Account)

Step 2: Deploy to Heroku by one click

Link : https://github.com/kkdai/LineBotTemplate

Step 2: Deploy to Heroku by one click

Remember this address

Step 3. Fill your Heroku App Callback address to Line Bot• Copy your app

address from Heroku to Line Dashboard.

• It will be something like “ https://xxxxxx.herokuapp.com:443/callback”

Fill your app dress here

Step 4. Get related Line Bot info for Heroku App setting

• Need copy following variable:

• Channel ID • Channel Secret • MID

Need copy those three

Step 5. Fill your Line Bot Information to Heroku Variables• In Heroku [Dashboard] ->

[Settings]-> [Config Variables]

• Create following variables:

• ChannelID • ChannelSecret • MID

• Fill with you just got from Line Bot Dashboard.

Send a Image to user

Parse bot request to received result

Send a Image to user

Make sure it is text message not operation

Send a Image to user

Send image to who text to the bot

“Hello” message from Line Bot

Hello

Send a “Hello” message when add bot as friend

Determine the operation type

Send a “Hello” message when add bot as friend

Get request from ID, this is only way for now

Example: PetNeedMehttps://github.com/kkdai/LineBotPetNeedMe

Build Facebook Bot

Step 1: Deploy to Heroku

Link : https://github.com/kkdai/FBBotTemplate

Remember this address

Step 2: Create Facebook Page

Step 3: Create App for Messenger

• Create new app “Web App”

• Select new product “Messenger”

Step 4: Create App Token

• Select generate token.

• Need a “Page”

Step 5: Paste token to Heroku Variable

Step 6: Setup Page Subscription for Messenger Bot

https://APP_ADDRESS.herokuapp.com/webhook

Token we just generate

Step 7: Select a Page for your Webhooks

Step 8: Select a Page for your Webhooks

Example: PetNeedMe

Build A Smart IM Bot

IM ?

IM Bot 10 years ago “ ”

: https://briian.com/2536/msn-bot.html

IM Bot 10 years later “Fugle ”

• Left Brain • Logical • Verbal • Language

?

?

?

?

?

??

??

?

?Intent: ??

Entity: ??

?Intent: Check Weather

Entity: ??

?Intent: Check Weather

Entity: Taipei

Use LUIS to build smart Bot

Use LUIS to build smart Bot

LUIS

Other Natural Language Processing Tool

Future

Future : Bot to Bot (No more API)

\

Future : Customer Service Bot

http://www.mobile01.com/topicdetail.php?f=383&t=4078424

Future : For Your Website and Business

Future : For Your Website and Business

Future : How About Build Right Brain?

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We are Hiring..

1. NFV/SDN Expert2. Data Engineer

http://weekly.codetengu.com/

Go Call For Speaker