serverless.md

Serverless Architecture

About Me

• @nodebotanist
• technically a student (studying for BSE in EE @ Arizona State)
• Developer Relations Engineer @ Auth0/Webtask IO
• Gender Non-Binary (they/them)

What is serverless?

• Why bother setting up an entire server just to run a webhook?
• Wanna customize slack without learning the entire API in a weekend?
• Want the ease of IFTTT but the power of Node.js?

Webtask.io

• Run Node code without setting up a server
• Have as little or as much control as you need
• Supports 600+ npm modules
• Custom slack slash commands with just a few clicks

The Webtask CLI

npm i -g wt-cli
wt init

more in the docs

The obligatory hello, world! example

module.exports = function(context, cb) {
    cb(null, { hello: context.data.name || 'Anonymous' });
}  

Full HTTP control

module.exports = function (context, req, res) {
    res.writeHead(200, { 'Content-Type': 'text/html '});
    res.end('<h1>Hello, world!</h1>');
}      

Using secrets

module.exports = function(ctx. cb){
    //common use: API keys for third-party services
    service.connect(ctx.secrets.myAPIKey);
}

wt create webtask.js --secret myAPIKey=doTHOhdeou8dhotedundh

Express

var app = new (require('express'))();
app.get('/', (req, res) => res.send('Hello World'));
module.exports = app;

Using Webtask for webhooks

• Write your webtask, using ctx.query if it will take GET requests and ctx.body if the webhook will take POST requests
• You'll get a URL when you deploy your webtask
• point the service at that URL

Using westask slack commands

docs

• Add the webtask app to your slack org
• run /wt create [name] in any channel
• you'll be pointed to the webtask editor to vrite your new commands

Having issues?

Open live-streaming logs using wt logs for the cli, they appear in the bottom pane of the web editor

Questions?

• @nodebotanist on Twitter, github, MLH slack
• [email protected]