middyjs/Lobby

🛵 The stylish Node.js middleware engine for AWS Lambda https://middy.js.org

Doruk Kutlu

@d0ruk

is there a reference repo for middy integration? i.e. examples

Luciano Mammino

@lmammino

@d0ruk, Do you mean writing your own middlewares?

Doruk Kutlu

@d0ruk

no, i read the docs.md

i meant a repo where i can scan some code

Luciano Mammino

@lmammino

regarding middy internals or use cases?

Doruk Kutlu

@d0ruk

to gauge best practices

use cases

Luciano Mammino

@lmammino

@DavidWells created an example repo, it might be useful: https://github.com/DavidWells/middy-example

Doruk Kutlu

@d0ruk

cheers

Luciano Mammino

@lmammino

You are welcome, @d0ruk, let us know if there's anything that is not clear or that we can improve in your opinion :)

Doruk Kutlu

@d0ruk

will do

Jose Santacruz

@joseSantacruz

Hi all, quick serverless question is there a way to preview the generated cloud formation files without building all the artifacts??

Chanlito

@chanlito

I found middyjs today, and I have to say, thank you, to @lmammino & all the contributors.

Luciano Mammino

@lmammino

@chanlito, thanks to your for trying middy :)

@joseSantacruz did you figure it out a way? I know that serverless framework has a command to build a package but not publish it, that way you should be able to see the cloudformation files

Thomas Edwards

@thomasedwards

I just found Middy today :heart_eyes:

Just casually re-writing my entire project now

dkatavic

@dkatavic

hello @thomasedwards . I hope you are gonna find it useful :smile:

Luciano Mammino

@lmammino

@thomasedwards looking forward to receiving your feedbacks :P

Today we just passed 200 stars!!! :)

Thomas Edwards

@thomasedwards

amazing!

has anybody ever had a Cannot destructure propertyhttpContentNegotiationof 'undefined' or 'null' error?

import middy from 'middy'

const {
  httpContentNegotiation,
  httpErrorHandler
} = middy.middlewares

const lovelyStuff = event => {
  // do stuff
}

const handler = middy(lovelyStuff)
  .use(httpContentNegotiation({ availableMediaTypes: ['application/json'] }))
  .use(jsonBodyParser())
  .use(httpErrorHandler())

export { handler }

I think it's because I'm using imports

Thomas Edwards

@thomasedwards

yup changed it to

const {
  httpContentNegotiation,
  httpErrorHandler,
  jsonBodyParser,
  validator
} = require('middy/middlewares')

Thomas Edwards

@thomasedwards

so when I import anything from middy/middlewares, I get the entire AWS library because of the S3 middleware?

this bumps up my file size from less than 1MB to 3.5MB

Thomas Edwards

@thomasedwards

done some digging and opened an issue: middyjs/middy#154

Luciano Mammino

@lmammino

Hello @thomasedwards , thanks a million for your contribution and sorry for the long wait, i was away for a conference :)

looking into your issue right now

Thomas Edwards

@thomasedwards

thank you! =)

have closed it, will investigate further

Thomas Edwards

@thomasedwards

also – any thoughts about giving more information from the validator? middyjs/middy#155

I have now realised that actually just editing the validator to pass the errors through as a string

rather than using 'Event object failed validation' would be possibly safer

Luciano Mammino

@lmammino

@thomasedwards thank you for pointing that out. I am currently slowly going over all the open issues an PR in my free time. I will try to address everything later this evening

Thomas Edwards

@thomasedwards

no worries! let me know if there's anything I can do to help

have replied to your comments, thanks @lmammino ! middyjs/middy#155

Thomas Edwards

@thomasedwards

Super loving 0.12 :thumbsup: Sooo much easier to debug now with the beautiful extreme logging – thanks team! :heart:

Thomas Edwards

@thomasedwards

Okay, I think I have a really tricky problem...

In one of my middlewares I have a promise that needs to return before it can continue

however, if I add async/await to the function, I get a whole load of errors and pain

Thomas Edwards

@thomasedwards

okay I found a way

I’m returning a promise to a variable set in the middleware

I don't do any async/await in the middleware

but then I await it when I use it later on

Andrea Falzetti

@rexromae_twitter

@vladgolubev hey mate, I'm trying to understand why the change that I've done to the docs, it's still not showing in the website. Did I miss any step?

Dan Van Brunt

@iDVB

HELP! Love Middy so far. Having an issue with writing jest tests with my custom middleware written with async/await. My middleware has a proper try/catch around the await. I've looked at the ssm middleware that is part of the core for ideas. My middleware works fine when I remove that single async call to S3. But with it I keep getting UnhandledPromiseRejectionWarning

Is there some special way to implement a middleware that uses async/await

Dan Van Brunt

@iDVB

@lmammino Would love if you have a moment to chime in on this. middyjs/middy#270 Seems like a current limitation when trying to test custom middleware.

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